International Journal of Global Warming (102 papers in press)
- by Ilan Kelman, Robert Stojanov, Shabana Khan, Oscar Alvarez Gila, Barbora Duží, Dmytro Vikhrov
Abstract: Climate change is stated as being likely to cause the forced movement of millions of people, especially from small island communities. Such statements are not always placed in wider and deeper understandings of mobility and non-mobility. Focusing on island communities, this paper assesses some of the implications inherent in mobility and non-mobility choices related to climate change in comparison to other factors and drivers. Culture and networks are examples of drivers demonstrating that it is not the norm for climate change to dominate mobility and non-mobility choices by islanders. Instead, choices often arise from social factors which, in turn, impact how climate change is and is not addressed. Without denying the major challenges which climate change has previously brought to some islanders and brings to many islanders today, climate change nonetheless brings little substantive change to discussions of islander mobilities.
Keywords: climate change, culture, displacement, environmental change, islanders, islands, migration, mobility, networks, refugee
- Biohydrogen production from normal starch wastewater with heat-treated mixed microorganisms from a starch factory
by Nusara Sinbuathong, Budsakorn Kanchanakhan, Suchat Leungprasert
Abstract: Biohydrogen production was studied from normal starch factory wastewater of approximately 20,000 mg chemical oxygen demand (COD)/l with heat-treated mixed microorganisms originating from the plant. Acclimated heat-treated microorganisms that produced H2 50% during the acclimation period were used as the parent culture. Experiments were performed in a batch and semi-continuous operation through dark fermentation. The results found that normal starch wastewater can be the sole carbon source for biohydrogen. For batch operation, the maximum hydrogen yield and specific hydrogen production rate of 250 ml at standard temperature and pressure (STP)/g COD degraded and 13.9 ml at STP/ g cells-hour were obtained when operating the system at initial wastewater pH 4. For semi-continuous operation, the maximum hydrogen yield of 100 ml at STP/g COD degraded was obtained when operating the system at an organic loading rate of 28.6 kg COD/m3-day or a hydraulic retention time of 18 hours. The fermentation medium pH should not be much higher than pH 5 during digestion.
Keywords: Anaerobic digestion;biogas;biohydrogen;global warming;mixed microorganisms;starch wastewater
- Long Term Rainfall Trends of Indian Urban Station and its Variation in Different Phases and Seasons
by Ramachandran Andimuthu, Anushiya Jeganathan
Abstract: This work studies rainfall trends for 196 years (1813-2009) of Meenambakkam Station, an old observatory located in Chennai, which is the fourth largest Metropolis in India. Precipitation data have been studied on the basis of months, seasons and periods. Long-term trends in rainfall were determined by Man-Kendall rank statistics and linear regression. There is a significant increase of long term Annual and Monsoon rainfall and insignificant increase of Winter and Post monsoon rainfall. Post monsoon, the main rainy season of Chennai contributes 59.8% of the annual rainfall, while contribution decreases to 57.6 % in 1951-2009 and a further decrease to 54.7% in the last nine years. Summer rainfall shows decreasing trend. Further, this study tries to find for an explanation for precipitation trends by two global climate phenomena, IOD and PDO. Annual rainfall has significant positive correlation with PDO and insignificant negative correlation with IOD. Rainfall in Post monsoon season has significant positive correlation with PDO. The negative PDO (PDO-) phases show a decrease in rainfall and positive phases shows excess rainfall. Teleconnections with other global indices have to be studied further and deeper.
Keywords: long term trend, seasonal variation, time periods, IOD, PDO
- Counting the non-CO2 diversion of biogenic carbon: An improvement suggested for the UNFCCC methodology
by Ijaz Ahmad, Ghulam Rasul Athar
Abstract: UNFCCC has developed a software to support Non-Annex I parties for preparation of their national GHG inventories. This paper identifies a weakness in the software on double counting of some GHG emissions. Most of the biogenic activities, livestock, rice cultivation, use of biomass, etc. are carbon neutral. However, these activities emit CH4 and CO consuming atmospheric CO2. The UNFCCC software counts CH4 and CO emissions without adjusting the consumed CO2.
GHG inventory of Pakistan was prepared for the year 2008 with the help of this software and guidelines of Intergovernmental Panel on Climate Change. The biogenic CH4 emissions, 34% of the 2008 GHG inventory, consumed 3.16 million tonnes of atmospheric carbon. The deduction of this carbon reduces the GHG inventory by 3.74%. This paper suggests improvements in the software to enhance the accuracy of GHG inventories.
Keywords: Pakistan; UNFCCC software; climate change; double counting; GHG inventories; atmospheric carbon; livestock; rice; biomass; biogenic CH4
- CLIMATE CHANGE ADAPTATION PROVISIONS FOR THE AGRICULTURAL SECTOR IN MALAYSIA
by Abul Quasem Al-Amin
Abstract: Malaysia has been experiencing an unusual harsh mixture of droughts and extreme rainfall events at present. As consequence, significant fall in crop production will be caused in the coming years. Current agriculture adaptation strategies are not significantly enough to cope with this issue. Therefore, this study aims to capture the scenarios in the field of climate change adaptation. The main focus of this study is to chalk out the adaptation efforts that the government and local stakeholders should consider. This study identifies the challenges associated with the implementation of adaptation options for the agricultural sector in response to climate change. Furthermore, this study presents some insight on the possible future strategies for adaptation that legislators may consider in designing and formulating the policy which may ultimately help the agricultural sector of Malaysia to be effective. Such adaptation framework actions and measures are adjudicated to assure cohesive participation of all concerned development bodies including government and non-government organizations along with local communities towards achieving the appropriate climate change response.
Keywords: Adaptation; Agriculture; Impacts; Climate Change; Malaysia
- Economic Implications of Climate Change: Evidence from Agricultural Productivity
by Inoussa Boubacar
Abstract: The increased frequency and severity of drought episodes have characterized the natural environment of the Sahel region in Africa during the past four decades. With little to no mitigation option available to them, countries of the Sahel will face a further deterioration of their economic environment, as an ill-agricultural sector will most likely drag down their whole economies. This paper uses a six-month standardized precipitation index and average temperature during the growing season days to quantify the adverse impacts of climate change on agricultural productivity. I first estimate a Malmquist productivity index and its efficiency and technical change components. I further assess the statistical significance of the indices by estimating confidence intervals around the point estimates using a bootstrap method. In the second stage of the analysis, I model the adverse effects of drought and temperature on agricultural productivity using a probit specification. The findings of this paper point to a dismal agricultural productivity. These findings also highlight the significant cumulative negative impacts of higher temperatures and recurrent droughts on agricultural-based economies.
Keywords: Agriculture productivity; climate change; drought; international development; Sahel; Sub-Saharan Africa.
- Trends of Climate Change as Related To Elevation above sea level
by Nada Jallo
Abstract: The HadCRUT3 data are used to analyze the dependence of the linear correlation slope parameter between monthly temperatures and atmospheric CO2 concentrations. The analysis demonstrated that the mean correlation coefficient at all elevation is always positive. This indicates an increase in the mean surface temperatures with increasing CO2 concentrations. Furthermore, it is shown that the positive values of the mean correlation coefficients are strongly related to the elevation above sea level. Most significantly is the decrease in this value at position located at 100-400 meter above sea level
Keywords: Climate change, Global Warming, HadCRUT3
- Adapting to climate variability: the views of peasant farmers in Nepal
by Sudarshan Chalise, Tek Narayan Maraseni, Jerry Maroulis
Abstract: There are growing concerns, especially from farmers in rural mid-east Nepal, about main-streaming locally-led climate adaptation strategies. Using a bottom-up approach, we analysed the bio-physical and socio-economic impacts on Nepalese agriculture from three focus group discussions and a survey of 60 peasant farmers to identify the relevant climate change impacts which were used to investigate how farmers practices overcome any climate-based barriers. The results suggest that farmers are partially able to minimize the impacts of climate-based barriers whereas they have difficulty in coping with non-climatic barriers. The results emphasise the role of government and other stakeholders in locally-led adaptation (not only in mitigation) as an avenue to combat the negative impacts of climate-based variability.
Keywords: climate variability, farmer perception, locally-led adaptation
- A NEW APPROACH TO CALCULATION OF ENERGY DEMAND AND AMOUNT OF EMISSION ACCORDING TO DIFFERENT INDOOR TEMPERATURE
by Mustafa ERTURK
Abstract: In this study, annual, monthly and hourly ambient temperature distributions are determined and analyzed for Karab
Keywords: heating degree-hour, energy change according to indoor reference temperature, energy, emission, carbon-dioxide and sulphur-dioxide.
- Assessment of Spatial Models for Interpolation of Elevation in Pakistan
by Ijaz Hussain
Abstract: Elevation has major impact on the climate change. Interpolation of elevation at any location in Pakistan may be useful for predicting environmental parameters such as precipitation, temperature, humidity and wind speed. Present study interpolates the amount of elevation at unobserved locations using: 1) model based ordinary kriging, 2) model based Bayesian kriging with constant trend, 3) model based Bayesian Kriging with varying trend,4) %spatial Gaussian process with andwithout trend and 5) spatial artificial neural network. Prediction maps of elevation for complete domain are estimated along with prediction standard deviation. The results of suggested methods are compared with means of leave one take others cross validation method. It is observed from cross validation method that model based Bayesian kriging with constant trend performs better than the other methods of predicting the amount of elevation in Pakistan.
Keywords: Bayesian kriging; elevation; ordinary kriging ; spatial artificial neural network
- INVESTIGATION OF EMISSIONS FROM THERMAL OXIDATION OF WASTE WOOD SAMPLES USING SPECTRAL METHODS
by Sema Yurdakul, Aysel Atimtay
Abstract: The objective of this study was to investigate the effects of chemical treatment and heating rate on the emissions released from various waste wood samples including untreated pine and chemically treated MDF, plywood and particleboard after thermal treatment. Emission characteristics of the samples were determined in situ by using their FTIR spectra. Some toxic and carcinogenic gases such as formaldehyde, isocyanate, ammonia and phenyl group were detected in emissions from low temperature combustion of treated samples. For this reason, urea-formaldehyde or melamine formaldehyde treated waste wood samples should be oxidatively pyrolyzed at low heating rates and low temperatures to remove nitrogen-containing toxic compounds such as ammonia and isocyanate.
Keywords: Biomass; Toxic Emissions; FTIR; Thermal oxidation; Chemical treatment;Formaldehyde
- Toward utilising geothermal waters for cleaner and sustainable production: potential of Li recovery from geothermal brines in Turkey
by Ziya Cetiner, Özgür Dogan, Göksel Özdilek, Pembe Özer Erdoğan
Abstract: Geothermal fluids are potentially significant sources of technology critical minerals and metals. As water flows through different geological layers of the earths crust, it gets heated and dissolves minerals and metals from the rocks. These geothermal fluids can be processed to recover valuable metals such as gold, silver, zinc, and lithium. Freely discharged geothermal water can be source of pollution in the environment. However recovery of some elements, such as mercury, arsenic, lithium, etc., can be a part of environmental protection in such areas. Interest and demand in lithium (Li) sources have increased in recent years. This is, in part, due to the wide applications of Li and its compounds in high-energy storage Li batteries, and in other technological fields e.g., nuclear energy systems. Moreover, the costs associated with resource extraction from geothermal fluids are believed to be relatively low, and therefore many possible recovery techniques have been suggested.
Lithium is one of the metals that dominate Na-Cl type of geothermal fluids in Turkey with its potential value. This article presents lithium concentrations of selected geothermal waters in Turkey and compares different methods that can be used to recover Li from them. Specifically, three methods will be discussed including direct precipitation as Li salts, separation by membrane filter and captured form through ion exchange resins.
Keywords: lithium recovery, geothermal waters, sustainable metal production, Turkey
- Impact of environmental education on mitigation of carbon dioxide emissions: a modeling study
by A. Misra, Maitri Verma
Abstract: Human activities have contributed significantly to the menace of global warming by enhancing the atmospheric level of carbon dioxide (CO2). Environmental education is an avenue to persuade people to reduce their CO2 emissions. Comprehension of the impact of environmental education on the reduction of CO2 emissions aids in devising effectual environmental education policies. In this view, we have formulated a nonlinear mathematical model to study the impact of educational programs on the abatement of CO2 emissions. It is considered that the educational programs are implemented at a rate proportional to the increase in atmospheric concentration of CO2 due to human activities. Model is analyzed by using stability theory of differential equations. Model analysis reveals that the educational programs are helpful in reduction of anthropogenic CO2 emissions. But if reduction rate of carbon footprint by educated people is small, increase in execution rate of educational programs and/or dissemination rate of education among people cannot effectively curtail CO2 emissions. Moreover, for high values of reduction rate coefficient of carbon footprint, atmospheric concentration of CO2 may not get stabilized. Numerical simulation is carried out to illustrate the theoretical findings.
Keywords: mathematical model, CO2 gas, environmental education, stability.
- Modeling of stand volume and tree density using Spot-4 satellite data: a case study in Devrez planning unit
by Alkan GUNLU, İlker ERCANLI, Sedat KELEŞ, Cihat ANLAR
Abstract: Estimation of forest stand attributes such as stand volume, basal area, tree density, crown closure and aboveground biomass in a large area using remotely sensed data are important for sustainable management and use of natural resources. Modeling forest stand attributes and combined characteristics are necessary for forest planning and management. The aim of this research was to evaluate the possibility of using Spot-4 satellite image for estimating stand volume and tree density in Devrez planning unit, northwestern part of Turkey. Based on a single Spot-4 satellite data, reflectance values and eight vegetation indices (VIs) were connected to the stand volume and tree density using multiple regression analysis to develop the stand volume and tree density models. Our results showed that a linear combination of Band 1, Band 3, SR, DVI, SAVI, EVI and IPVI were better predictors of stand volume (adjusted R2=67 %; root mean square error (RMSE) =8.93 m3 ha-1). In addition, the regression model with Band 1, Band 3, SR, DVI, NLI and IPVI as independent variables was a better predictor of tree density (adjusted R2= 62 %; RMSE=6.03 n ha-1). In conclusion, forest stand attributes including the stand volume and tree density can be estimated and modelled using the reflectance values and VIs obtained from spot-4 satellite image.
Keywords: Ground data, spot 4 satellite data, stand volume, tree density.
Keywords: Ground data, spot 4 satellite data, stand volume, tree density
- Analyzing the Environmental Kuznets Curve for CO2 Emissions in China Using Segmented Equations and Partial Least Squares
by Qian Gao, Ming Meng, Lei Wen, Dongxiao Niu
Abstract: This study investigates the dynamic relationship between economic growth and CO2 emissions in China from 1979 to 2010. We propose a segmented equation for the environmental Kuznets curve (EKC). The partial least squares method is used to estimate the equation parameters. The conclusions drawn are as follows. (1) Chinas CO2 emissions are still in the first stage of the EKC. A significant increase in income per capita is needed for Chinas CO2 emissions per capita to reach its peak point in the inverted U-shaped EKC. (2) The ideal equation used to simulate the relationship between Chinas income per capita and CO2 emissions per capita after 2010 is . This equation can help Chinas government set its ideal CO2 control target at a specific income per capita, at least until the income per capita reaches RMB 19137.2. (3) Chinas CO2 emissions per capita will peak some time between 2026 and 2027. After 2027, Chinas CO2 emissions per capita will decrease as income per capita increases.
Keywords: environmental Kuznets curve; China; CO2 emissions; segmented equation; partial least squares
- Fabrication, characterization and CO2/N2 gas permeance study of Novel blended membrane.
by Sarah Farrukh, Fozia T. Minhas, Arshad Hussain, Muhammad Mujahid
Abstract: The CO2 gas is the primary green house gas, which is the main cause of global warming. To capture CO2 gas, it is important to study the permeance behavior of CO2 and N2 gases from different membranes. In this work, 5,11,17,23-Tetra-tert-butyl-25,27-bis-(2-piprazinoethyl)-26-dihydroxycalixarene (CLP)was blended into Cellulose Acetate (CA) membrane to be used for gas permeation. Diffusion Induced Phase Separation (DIPS) method was applied to fabricate membranes. The CA/CLP membranes were fabricated by varying concentration of CLP with respect to CA at 10wt%, 20wt%, 30wt% and 40wt%.The prepared membranes were characterized via Fourier Transform Infra Red spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). CO2 and N2 gases were used for the gas permeation experiments. The increasing trend was observed in permeance of N2 gas as compared to CO2 gas for CA-CLP blended membranes.
Keywords: : calixene; cellulose acetate; global warming; green house gas; permeance; DIPS; N2/CO2; piprazene; blended membranes, fabricated membranes; FTIR; SEM analysis of membranes;
- Investigation of Alternative Blasting Process in Terms of Impact Behaviour of Blasting Materials for Green Shipyards
by Veysel Alankaya, Ugur Celebi
Abstract: Blasting process in shipyards could be marked as one of the most significant sources of waste; thus it is considered mandatory for the surface preparation before painting process in new shipbuilding or for the removal of the old paint from the surface of old vessels. The particulate emissions are contaminated by blasting abrasives and paint chips during surface preparation processes and might contain toxic metals concerning the production area, off-site and surrounding surface waters when blown off-site. Environmentally friendly shipyards have gained more importance due to global warming and its undeniable effects. Therefore, replacement of traditional production methods with less contaminating, more environmentally safe and alternative processes which do not affect human health as much is vital. In this study, abrasive-blasting materials for surface preparation are investigated by means of impact effectiveness of the material. The numerical results, derived from a commercial dynamic explicit finite element program, are presented denoting the blasting efficiency and damage behavior by material type, material geometry and particle velocity. A new point of view regarding choosing blasting material, decreasing amount of waste and pollution for a green world is tried to be presented.
Keywords: pollution sources; shipbuilding and ship repair industry; blasting materials; waste minimization
- Effect Of Nanoparticle Additives On Nox Emissions Of Diesel Fueled Compression Ignition Engine
by Tayfun OZGUR, Gökhan TÜCCAR, Erinc ULUDAMAR, Ceyla GUNGOR, Mustafa OZCANLI, Hasan SERIN, Kadir AYDIN
Abstract: The amount of emitted harmful emission gases increases in parallel with increasing energy consumption. This increase has forced many countries to take various precautions and various restrictions on emitted emissions have been carried. In this study, effects of addition of oxygen containing nanoparticle additives to NOx emissions of diesel fuel were investigated. Nine different nanoparticle additives namely Aluminum Oxide (Al2O3), Magnesium Oxide (MgO), Titanium Oxide (TiO2), Zinc Oxide (ZnO), Silicon Oxide (SiO2), Iron Oxide Fe2O3, Nickel Oxide (NiO), Nickel Iron Oxide (NiFe2O4) and Nickel Zinc Iron Oxide Zn0.5Ni0.5Fe2O4 were added to diesel fuel at the dosages of 25, 50 and 100 ppm. As a result, optimum additive and addition dosages were determined and NOx emissions were decreased with the addition of nanoparticles.
Keywords: Nanoparticle, nitrogen oxide, emission, additive, diesel
- Uncertainties, Risks and Challenges Relating to CO2 Emissions and Its Possible Impact on Climate Change in the United Arab Emirates
by Hasan Arman
Abstract: CO2 concentrations in the atmosphere have increased by around 35% since the beginning of the industrial era. Both human-induced and natural factors trigger climate changes and associated risks. Since the discovery of oil in the United Arab Emirates (UAE) around 1960, the country has experienced high population growth and very rapid economic development with associated high demand on energy in various sectors. The response to this remarkable energy demand was the burning of fossil fuel. CO2 emissions in the UAE in last 51 years have averaged about 32.4 metric tons per capita (mtcp). During the last 16 years the highest annual mean temperature maximum was 28.9oC in 2010. The lowest annual mean temperature maximum was 27.2oC in 1997. During the same period the highest yearly rainfall was 21.5 mm in 1995, while the lowest was 1.0 mm in 2001. The main objective of this paper is to identify and discuss the potential risks and uncertainties that trigger global warming and climate change, including the expected challenges to come from these changes, and to analyze the likely impact of CO2 emissions on the UAEs climate change, respectively.
Keywords: uncertainties; risks; challenges; CO2 emissions; climate change; global warming; U.A.E.
- Climate Change, Seasonal Changes in Cassava Production and Konzo Epidemics
by Olusegun Steven Ayodele Oluwole
Abstract: Abstract: Seasonal konzo epidemics, which occur during droughts in Central, East, and Southern Africa, are attributed to exposure to cyanide from cassava foods. Severe droughts of global warming are predicted to increase cassava production. Trends and seasonal changes of temperature, precipitation, and cassava production were analyzed, and a model was proposed to explain the impact of climate change on cassava production and seasonal konzo epidemics. Spectral analyses of temperature, precipitation and cassava production data from 1961 to 2012 were done. Temperature increased by 1.1 ∘C in 52 years, while cassava production increased by 13 % during low precipitation. Correlation of seasonal changes of precipitation and cassava production was 1 at periods of 4 and 6 years. Severe droughts of environmental warming will increase seasonal cassava production, water shortage, and seasonal konzo epidemics in areas of subsistence farming. Food and water programmes are needed to control seasonal konzo epidemics. rn
Keywords: keywords: Climate Change, Global Warming, Cassava, Cyanide, Konzo, Epidemic, Seasonal
- Potential of GHG Emission Reduction from Agriculture Sector
by Indrayani Nimkar, Anju Singh, Seema Unnikrishnan, Neelima Naik
Abstract: Land use change activities, use of fertilizers, and open field burning of agricultural waste are the major sources of greenhouse gas (GHG) emissions in the agriculture sector. Clean Development Mechanism (CDM) of Kyoto protocol has proved useful in the mitigation of such GHGs. A total of 167 CDM projects of the agriculture sector are being studied across 19 countries. Out of these, Brazil has implemented a maximum of 46 CDM projects. Expected carbon emission reduction from the above 167 projects was about 10,083,912 metric ton of CO2 equivalent (MtCO2e), out of which actual emission reduction achieved till October 2012 was 4,989,448 MtCO2e per annum. India has implemented 12 projects in the agriculture sector with estimated carbon emission of 620,457 metric ton CO2e, out of which actual emission reduction achieved was 265054 metric ton CO2e. Fifteen different methodologies were used worldwide in the above mentioned CDM projects, in which India has used 9 methodologies, followed by Chile with 7 methodologies. Methodology AMS-III.D Methane Recovery in Animal Manure Management Systems was used for 66 projects. Manure from livestock generates biogas, releasing methane directly into the atmosphere. Implementation of CDM methodology AMS-III.D pertains to the use of generated biogas for flaring or energy generation. Methodology AMS-I.D titled Grid Connected Renewable Electricity Generation was used in 49 projects. Application of the AMS-I.D methodology relates to the generation of renewable energy units that supply electricity to regional or national grid. CDM promotes projects that use renewable energy sources with clean technology leading to less dependency on conventional energy sources, ultimately reducing GHG emissions. It is, hence, valuable to have CDM projects in the agriculture sector as these provide various GHG mitigation options that reduce energy needs, recycle the generated waste and enable the use of alternate energy sources. This paper presents for the first time an overview of the contribution of CDM towards GHG mitigation in the agriculture sector.
Keywords: Clean Development Mechanism, Green House Gases (GHGs), Agriculture
- The Effectiveness of Climate Change Communication and Information Dissemination via the Internet: experiences from the On-Line Climate Conference Series
by Walter Leal Filho, Franziska Mannke, Evangelos Manolas
Abstract: Despite the importance of and the need for using internet-based approaches to promote information and raise awareness on climate change, there is a paucity of initiatives which may foster this cause on a long-term basis. This paper presents the concept, approaches, methods, experiences and results from an on-line climate change conference series led by the Hamburg University of Applied Sciences (HAW Hamburg), which, since its inception in 2008, has engaged over one million participants in over 150 countries. Covering a wide range of topics including water use, disasters management, and technologies, the on-line climate change conferences provide useful insights on matters which may be considered, in ensuring climate change can be successfully communicated via on-line tools.
Keywords: Communication; Climate change; Internet; Information; Dissemination
- Hydrogen Production by Spirulina Maxima 2342 Under Different Light Intensities And Quantification Employing A Fuel Cell
by Pathiyamattom Joseph Sebastian, Alina Juantorena, Orlando Lastres, Geovanni Hernandez, Armando Bustos, Delfeena Eapen
Abstract: In this work the photosynthetic hydrogen production employing Spirulina maxima 2342 microorganisms was determined under different experimental conditions, for the same biomass property (concentration) and three different light intensities (150, 112 and 75 μE/m2.s). The hydrogen production was quantified employing a Proton Exchange Membrane Fuel Cell (PEMFC) which produces electricity using the hydrogen produced in this experiment. The highest faradaic efficiency and hydrogen flow rate into the PEMFC (1,54 x10-8 kg/h) was obtained for a light intensity of 150 μE/m2. s.
Keywords: Hydrogen, photosynthetic microorganisms, Spirulina maxima 2342, PEMFC.
- TEMPERATURE DISTRIBUTION AND ENVIRONMENTAL IMPACT OF TEKIRDAG ATATURK FOREST NATURE PARK
by Murat Özyavuz, Bayram Cemil Bilgili, Gülşah Elkıran
Abstract: The term heat island describes built up areas that are hotter than nearby rural areas. The annual mean air temperature of a city with 1 million people or more can be 1.85.4
Keywords: Open and green space, temperature, geostatistics, landscape planning
- Development of methodology for the assessment of changes in household electricity consumption and calculation of CO2 emissions
by Ilze Laicane, Andra Blumberga, Marika Rosa, Dagnija Blumberga, Uldis Bariss
Abstract: This study outlines a methodology for assessing changes in household electricity consumption and CO2 emissions. The method is proposed to analyze large data sets of residential electricity consumption in the case study of the first smart metering pilot project in Latvia. The goal of the project is to achieve a reduction of electricity consumption in households by 10%. In order to do so project aims to increase household users awareness of smart technologies, as well as to promote households involvement in energy efficiency measures. The proposed methodology is based on several steps, including: 1) baseline situation analysis; 2) normalization of electricity consumption data; 3) identification of the factors affecting household electricity consumption; 4) an empirical analysis of households electricity consumption using regression analysis; 5) assessment of changes in electricity consumption at the end of evaluation period and 6) calculation of CO2 emissions. Finally, the first results of the smart metering pilot project in 9-month period has been presented. The recommendations for policy development on promoting smart metering has been raised at the end of this Paper
Keywords: Smart metering, electricity consumption, household, energy efficiency, CO2 emissions, data normalization, assessment of changes in household electricity consumption
- Climate Variability and its Impacts on Water Resources in the Upper Indus Basin under IPCC Climate Change Scenarios
by Juergen Pilz, Firdos Khan, Muhamad Amjad, David Wiberg
Abstract: The Upper Indus Basin (UIB), having latitude 320 N to 370 N and longitude 72.40 E to 810 E is chosen for hydrological impact assessment. The output of a Regional Climate Model (RCM), Providing Regional Climate for Impact Studies (PRECIS), is used as input data to the hydrological model to produce inflow projections at the Tarbela Reservoir on the Indus River. Maximum temperature, minimum temperature and precipitation are investigated for possible climate change in the region. The above mentioned variables are changing over time and clearly indicating that climate change is happening. The Best Easy Systematic (BES) estimator and Mean Monthly Correction Factor (MMCF) techniques were used for statistical bias correction in temperature and precipitation, respectively. The hydrological model was calibrated for the 1995-2004 period and validated for the 1990-1994 period with almost 90 % efficiencies. The results show that the variables have a slightly increasing trend under the A2 scenario compared to the B2 scenario. The projections of inflow to the Tarbela Reservoir show that there is an overall increase of 59.42 % and 34.27 % to the Tarbela Reservoir during the period of 2040-2069 under the A2 and the B2 scenarios, respectively. It is important that there will be much more water available in the future, with the highest inflow and comparatively more water shortage noted in the 2020s under the A2 scenario. Finally, the impacts of changing climates on the operation of Tarbela Dam are investigated. It is noted that there is no chance of overtopping the dam during the 2020s and the 2050s under the A2 and the B2 scenarios.
Keywords: Climate Change, Hydrological Model, Impacts assessment, Indus River, Inflow, Scenarios, Tarbela Reservoir, Reservoir management, Calibration, Bias correction.
- Examining the potential impact of land use/cover changes on the NPP ecosystem services of Yanan region of China: A scenario-based analysis
by Li Jing
Abstract: The main purpose of this study is to examine the potential impacts of the past and future land use/cover (LUC) changes on the ecosystem services of Yanan region of China, and discuss their implications for policy development and implementation. Remote sensing-derived LUC maps for 2009, a Geographic Information Systems-based LUC change model, and ecosystem service value of NPP were used to facilitate the analysis. The results forests have significantly higher NPP values than farmlands, whose NPP is approximately equal to that of brushlands. The scenario-based LUC change analysis revealed that if the urban LUC change pattern continues, the total ecosystem service value of NPP will also change, especially if the forest cover is not fully protected and conserved. Geospatial tools and techniques facilitate exploratory analysis critical to the understanding of the potential impacts of future LUC changes under different scenarios. Our results highlighted that under the great pressure of urbanization, there is a need to strengthen the proper implementation of policies in order to maintain and improve ecosystem services. Although there are limitations to the estimated ecosystem service value of NPP of yanan to be taken into account in future studies, the magnitude of the estimated changes in the LUC is substantial. Thus, it may still be possible to draw general inferences about the effect of the perceived LUC changes on the estimated ecosystem service value of NPP.
Keywords: ecosystem service; NPP; land use patterns; Yanâ€™an; scenario-based analysis
- DETERMINING THE ESSENTIAL PARAMETERS OF BEDLOAD AND SUSPENDED SEDIMENT LOAD
by Ali Osman Pektas
Abstract: Appropriate prediction of sediment load concentration being carried by streams has a vital importance of water resources quantity and quality studies. In most studies some dimensionless parameters are derived by using observed variables of sediment system and then used as inputs of predictive models. In this study, instead of deriving new variables, widely used non-dimensional sediment model parameters have been compiled and examined. The main purpose of the study is to decide the essential parameters to establish effective models in predicting for both bed load and suspended sediment load. Cluster analysis, principal component analysis, multiple regression analysis and sensitivity analysis in artificial neural networks are used to determine the most influential parameters. The results of all methods are evaluated together and the parameters that are found significant are detected as the most relevant parameters.
Keywords: Bed load; Suspended Sediment Load; Cluster analysis; Principal Component Analysis; Multiple Linear Regressions; Neural networks.
- Process Simulation of Ammonia-Based CO2 Capture and Regeneration in Packed Column
by Muhammad Asif, Woo-Seung Kim
Abstract: Post-combustion CO2 capture using aqueous ammonia offers advantages over the conventional amines solvent, including a lack of corrosion, an enhanced CO2 loading capacity, a lower solvent degradation rate and a low energy input requirement for solvent regeneration. In this paper, an aqueous ammonia-based CO2 absorption-desorption process integrated with a washing column is modeled and simulated in Aspen Plus
Keywords: aqueous ammonia, chemical absorption, CO2 capture, global warming, Post-combustion
- Climate change awareness, coping mechanisms and adaptation in poor rural coastal communities, Ben Tre Province, Vietnam
by Kim Anh T. Nguyen, Curtis M. Jolly, Trang T.H. Le, Chuong N.P.T. Bui
Abstract: Ben Tre Province in Vietnam is ranked among the most vulnerable places in Asia to climate change events. We conducted a study to evaluate community knowledge, awareness, perception severity, coping mechanism and adaptation to climate change in Ben Tre Province. Community members were aware of changing climatic conditions. About 90 percent of respondents suffered losses from salt water intrusion. Households adopted coping mechanisms to deal with these changes. Age, education and previous affliction with climate change events influence knowledge, awareness, perception of severity and preparedness to manage climate change events. Local governments proposed adaptation strategies such as building of dikes to prevent salt water intrusion and developing of irrigation systems. Of the two adaptation strategies evaluated to losses from climate change, the sea dike system protected more land but the irrigating system was more cost effective in mitigating losses from climate change
Keywords: Vietnam; climate; change; community; awareness; adaptation; mitigation; strategies; cost-effectiveness.
- A Preliminary Assessment of Observed and Projected trends in the Diurnal Temperature Ranges over South India under SRES A1B Scenario.
by Dhanya P, Ramachandran Andimuthu, Radhapriya P, Thirumurugan P
Abstract: In the present study, the PRECIS, a regional climate model, is employed to simulate the baseline (1970-2000) and future 2071-2100 (2080s) maximum, minimum and diurnal temperature range changes under SRES A1B scenario over the Kancheepuram district of Tamil Nadu, South India. A comparison of the simulated baseline results with observation data acquired from IMD show that PRECIS can well simulate the local distribution characteristics of diurnal temperature range over the study area with a correlation coefficient (R2) value of 0.948 with 1% significance level. Analyses of the simulated results in the 2080s under SRES A1B scenario relative to the baseline shows that there would be an overall increasing trend in the maximum and minimum temperatures over the study area and the warming amplitude in the north, west and interior parts are projected to be greater than in the east coastal areas. Sens slope estimator supported by the Man Kendal test shows that the diurnal temperature range in the 2080s under SRES A1B scenario relative to the baseline are projected to decrease annually by-0.015o C and a statistically significant decrease of -0.029o C during the southwest monsoon season in the overall study area.
Keywords: PRECIS, Climate change; Diurnal Temperature Range; Regional climate model; Dynamical Downscaling; SRES A1B Scenario;Maximum and Minimum Temperatures.
- CLIMATE CHANGE, FISH CATCH AND PREMIX FUEL SUPPLY TO FISHERMEN FOR SUSTAINABLE LIVELIHOODS OF COASTAL PEOPLE IN THE CENTRAL REGION OF GHANA
by Imoro Razak Jaha, Emmanuel Kodjo Ekumah
Abstract: Fish is Ghanas most important non-traditional export commodity and the fisheries sub-sector accounts for about five percent of the agricultural Gross Domestic Product (Dontwi et al., 2002). In 2002, export earnings from fish and fishery products amounted to nearly 96 million US Dollars (Dontwi et al.2002). Fishing activities in Ghana include artisanal, semi-industrial and industrial operations. However, this important gain in GDP from the fishery subsector is highly threatened by climate change and its variability. Climate change is the gradual, long-term alteration of worldwide weather patterns, especially increases in temperature and storm activity, attributable to the increased accumulation of greenhouse gases in the atmosphere (Yaqub, 2010). Changes in climate directly affect the productivity of fish as well as the ability for fish catch depends also on the supply of an essential component of the fishing activities which is the premix fuel. The supply of premix fuel determines the availability of fish since fishermen heavily rely on this product for their fishing activities. The paper examines the nexus among the three variables of climate change, fish catch and supply of premix fuel for sustainable livelihoods of the coastal people of Ghana.
Keywords: Key words: Climate Change, Fish catch, Premix fuel supply, Fishermen and sustainable livelihoods
- Regional and Sectoral Impacts of Climate Change Under International Climate Agreements
by Shin Sakaue, Koichi Yamaura, Toyoaki Washida
Abstract: This article examines regional and sectoral impacts of climate change under international climate agreements for abating GHGs. Using the IAM with sub-global CO2 abatement games involving players from three regions (Japan, China and the U.S.), we obtain both non-cooperative and cooperative solutions. Simulated results indicate: 1) there is little discrepancy between future temperature solutions if each region responds selfishly when reducing CO2 emissions; 2) cooperation between all game participants sees an increase in GDP, whilst non-participant regions suffer greater damage; 3) all sectors in participant countries increase in value-added, with other regions experiencing higher damages for most sectors under cooperation than under the scenarios proposed by the international community.
Keywords: EMEDA; integrated assessment model; IAMs; CGE models; global
warming; climate change; non-cooperative game; bargaining game; Nash equilibrium; Nash bargaining solution.
- Mainstreaming Ethnoclimatology for Climate Change Assessment and Adaptation in Mountain Ecosystems
by Bhaskar Padigala
Abstract: Native communities inhabiting the Himalayan environment are mostly susceptible to environmental and other drivers of transformations, but, these communities have been living in the highly variable climatic environment for centuries and thus, possess an vast amount of localised traditional knowledge that has helped these communities to survive and thrive in such extreme ecosystem. But, ongoing discourses on vulnerability and adaptation to climate change impacts these ethnic knowledge systems has not been given much of an importance. Hence, this study has tried to explore the different ethnoclimatological practices followed by local communities in Himachal Pradesh, India.
Changing social and economic scenarios and inadequate governmental interventions are slowly leading to the disappearance of the traditional knowledge. However, local ethnoscientific knowledge has a tremendous potential to meet the challenges of climate change impacts. Hence, there is a need to integrate traditional knowledge with the scientific understandings to develop sustainable local or regional climate change assessment, mitigation and adaptation strategies that are best suited for the local ecosystem and involve local communities participation.
Keywords: Ethnoclimatology, Traditional Knowledge, Local Communities, Climate Change, Adaptation
- Combined Heat & Power System Optimisation under Carbon Pricing Policy: A Comparison of Five Carbon Markets
by Chanel Gibson, Mehdi Aghaei Meybodi, Masud Behnia
Abstract: The installation and optimisation of a gas turbine combined heat and power system was studied in an effort to reduce or eliminate financial liability under five different carbon pricing schemes around the world by becoming more energy efficient. The system was applied to a case study and configured to operate under carbon prices in Australia, the UK (EU ETS), New Zealand, California (USA), and British Columbia (Canada). As a policy designed to promote a reduction in emissions; the policy was successful in three of the five schemes namely Australia, the UK and British Columbia. These results were identified by systems that became unprofitable once financial liability was introduced for carbon emissions. The Australian carbon price was also examined in terms of effectiveness in light of its expected repeal. The Australian system ranked fourth of the five markets studied in terms of financial benefit both when financially liable and not liable for carbon pricing.
Keywords: carbon prices; cogeneration; combined heat and power systems; emissions trading schemes; emissions reduction; gas turbines; partial load operation; thermo-economic optimization
- Investigation of sea level rise effect on saltwater intrusion in an unconfined coastal aquifer using sharp-interface approach
by Freydoon Vafaie, Seyed Sadjad Mehdizadeh
Abstract: A numerical sharp-interface model is developed to predict saltwater intrusion (SWI) into an unconfined coastal aquifer due to sea level rise (SLR). The model is applied to a conceptual field-scale aquifer to explore the sensitivity of the intrusion mechanism to various involved parameters. In all of the simulations, appropriate SLR rate has been applied to the sharp-interface model. The 90 years unsteady results showed that change in hydraulic conductivity, rainfall recharge and freshwater inflow have significant effect on intrusion but the model is not very sensitive to different values of porous media porosity and specific yield. Afterward, the seaside saltwater head is raised and the toe of new time dependent salt wedge is determined. The results demonstrated that the SLR leads to more SWI. This excess intrusion is not very clear when SLR rate is low (e.g. 0.2 mm/year) but saltwater intrudes significantly further when the rate gets the higher values (e.g. 8 mm/year).
Keywords: Saltwater intrusion, Unconfined aquifer, Sharp-interface approach, Sea level rise
- Analysis of potential GHG emissions reductions from methane recovery in livestock farming
by Michela Gallo, Adriana Del Borghi, Carlo Strazza
Abstract: Livestock farming is a significant source of greenhouse gases (GHG) owing to the high amount of methane emissions. The purpose of this paper is to present an analysis of the potential emission reductions and their enhancement during manure management through the optimization of the main parameters involved, such as temperature, manure characteristics, type of management system. The investigation of a swine manure management system is performed with calculation of GHG emissions reduction due to a methane recovery system coupled with on-site power generator. The analysis conducted on the three parameters considered shows a variation of the methane emissions from 390 (drylot) to 31,000 tCO2e /year (anaerobic lagoon or liquid/slurry). The findings demonstrate that the substitution of anaerobic lagoon systems with a methane recovery system can be considered as a promising process in terms of GHG emissions reduction also in case of not highly favorable conditions of temperature and manure characteristics.
Keywords: Biogas; Recovery; Manure; Anaerobic digestion; Global warming; Kyoto protocol; Greenhouse gases; GHG; Methane; Carbon dioxide; CO2 emissions; Livestock; Swine; Emission reduction; Energy generation.
- Risk of impacts from extreme weather and climate in river-based Tilapia cage culture in northern Thailand
by Phimphakan Lebel, Niwooti Whangchai, Chanagun Chitmanat, Louis Lebel
Abstract: This paper analyses the direct impacts of extreme weather, high and low flow events, seasonality and other climate-related phenomena on river-based tilapia cage aquaculture in Northern Thailand. An interdisciplinary approach was taken, which included analysis of secondary water flow and meteorological data, quantitative and qualitative surveys of farmers experiences with extreme events, and direct observations during critical periods. Findings show that extreme high and low flows adversely impact a substantial fraction of farms, causing damage to cages, fish deaths, slow growth and disease problems. Economic losses are significant and result in financial debt. Compensation and assistance following floods is modest relative to losses, and coverage is incomplete. Probability of extreme flows and impacts vary among locations, are highly seasonal, and vary inter-annually. These findings are important to improving management of climate-related risks, under both current and future climatic conditions.
Keywords: climate, floods, aquaculture, drought, adaptation, risk
- GREENHOUSE GAS EMISSIONS VARIATION AND CORPORATE PERFORMANCE IN INTERNATIONAL COMPANIES
by Isabel Gallego-Alvarez, Liliane Segura
Abstract: The purpose of this study is to analyse the impact that variations in greenhouse gas emissions (20072008) had on corporate performance during three time periods2008, 2009, and 2010while taking two variables as a measure of firm performanceROE and ROAand considering a time period affected by a financial crisis, all under the perspective of the resource-based theory. The empirical analysis was performed in two stages: (i) analysis of the data obtained through content analysis and (ii) analysis of the factors that influence corporate performance using a dependency modela multiple linear regression. Several variables were introduced to represent emissions variations, the size of the companies, leverage, public pressure, capital intensity, and the firms growth rate. Also, dummy variables have been incorporated for the activity sector in which the company operates. The results show that variations in greenhouse gas emissions (CO2) do not affect either ROE or ROA; therefore, the hypotheses could not be confirmed. Nonetheless, other variables, such as capital intensity, size, firm growth rate, and activity sector, have a positive and statistically significant effect on ROE and ROA.The findings of this work can be considered of great interest on the international level because on the one hand they show a reduction in greenhouse gas emissions by firms pertaining to strategic sectors in this sense, and on the other a dependence model is established to test how the variation in emissions affects firm performance under the resource-based view theory. Furthermore, certain control variables are considered, such as capital intensity, public pressure, and firm growth rate, which until now have seldom been analysed in this context.
Keywords: Greenhouse gas emissions, CO2 emissions variation, corporate performance, financial crisis, resource-based view theory, capital intensity, firm growth rate, public pressure
- Potential Evaluation of CO2 Flooding for EOR and Sequestration in YL Oilfield of China
by Liping He, Pingping Shen, Xinwei Liao, Hao Chen, Fangfang Li
Abstract: Ordos Basin is the largest low permeability onshore petroliferous basin in China, with the total reserve amount of over 1 billion tons. CO2 EOR and sequestration in this region enjoy huge potential and broad prospect. In this paper, eighteen oilfields in YL city and its surrounding area within 300 kilometers was taken as the study object, potential of CO2 flooding for EOR and sequestration was researched and evaluated. Results show that 8 oilfields are suitable for CO2 miscible flooding and 10 oilfields are suitable for CO2 immiscible flooding. The predicted enhanced recovery efficiencies are about 12% and 6.5%, respectively. The expected cumulative oil production is 80 million tons with CO2 storage of over 130 million tons.
Keywords: CO2 flooding, CO2 sequestration, enhanced oil recovery, Minimum miscible pressure
- Nexus between Energy Consumption and Economic Growth: The Comparison of Non-Renewable Natural Resource Poor and Rich Countries
by Bernur Acikgoz, Mine Yilmazer, Serkan Cinar
Abstract: The aim of this study is to determine the effects of renewable and non- renewable energy resources on economic growth in non-renewable natural resource poor and rich countries. For this purpose, a Cobb-Douglas production function is used by adding the energy source as an element of production from 1990 to 2012. In the models, the cointegration between resources and economic growth is tested by a panel cointegration technique. For long-term coefficient estimation, the panel autoregressive distributed lag (ARDL) test that is based on Pesaran et al. (1999) is used. According to the results of the pooled mean group (PMG), long-term and short-term results are consistent. Renewable resources have a relatively higher positive effect on economic growth in non-renewable natural resource rich countries. Moreover, these positive effects are higher in lower and upper middle-income countries (LMIC and UMIC) than in high-income countries (HIC). Our findings suggest LMIC and UMIC countries -especially in the group of non-renewable natural resource rich countries- value and consider the use of renewable energy resources for energy production decisions in their economic growth policies.
Keywords: Renewable energy, economic growth, non-renewable natural resource rich countries, non-renewable natural resource poor countries, panel cointegration, Panel ARDL.
- Loss and damage from typhoon-induced floods and landslides in the Philippines: Community Perceptions on climate impacts and adaptation options
by Lilibeth A. Acosta, Elena A. Eugenio, Paula Beatrice M. Macandog, Damasa B. Magcale-Macandog, Elaine Kuan-Hui Lin, Edwin Rosell Abucay, Alfi Lorenz Cura, Mary Grace Primavera
Abstract: Loss and damage from floods and landslides are escalating in the Philippines due to increasing frequency and intensity of typhoons. This paper investigates the types and scale of loss and damage in two municipalities that were affected by typhoon-induced floods and landslides in 2004 and 2012. It assesses peoples preferences on adaptation measures and perceptions on human-nature links on occurrence of disasters. It reveals that human loss and property damage are causing psychological distress to affected people, undermining capacity to adapt to the next disasters. Many vulnerable people are not aware of the link between climate and land use change. Moreover, many depend on unsustainable land use for source of livelihoods particularly after disasters. The preference for measures to reduce landslide risks through reforestation and logging/mining prevention is thus low. Insurance is not a preferred mechanism for reducing risks because regular payment of premium is not affordable to vulnerable people.
Keywords: adaptation, adaptive capacity, climate change, conjoint analysis, disasters, floods and landslides, Haiyan, loss and damage, mitigation, Philippines, risks, typhoons
- Wet Bulb Globe Temperature (WBGT) across Western Turkey according to the ENSEMBLES Project
by Hamza Altinsoy, Haci Ahmet Yildirim
Abstract: The direct effects of climate change on workers thermal comfort as well as its indirect effects on occupational health and safety are analyzed. The region of interest is western Turkey. The Regional Climate Model (RCM) results of daily maximum air temperature and relative humidity from the ENSEMBLES project are used to form past and future projections. There are various indices used to observe the thermal comfort conditions for workers. In this research, Wet Bulb Globe Temperature (WBGT) is used for outdoor environments as outdoor workers make the prime target group. The seasonal spatial distribution of WBGT across the selected region during the reference period (1970-1999) in addition to alterations thereof for the three future periods (namely, 2010-2039, 2040-2069 and 2070-2099) is calculated. The emerging monthly time series for the annual WBGT is analyzed for the time period from 1970 to 2100. By the end of the 21th century, this reaches 24 ˚C in June and August, particularly across southern Turkey.
Keywords: WBGT; Turkey; Thermal Comfort; ENSEMBLES Project; Climate Change; Regional Climate Model
- Impacts of Human Farm Activities on Tropical Deforestation and Climate Change: Interactive Statistical Models
by R Krishna Prasad
Abstract: The tropical rainforests are essential for sustainable development of earths ecosystem. The rainforests are rich storehouse of biodiversity, natural pharmaceutical products, source of sustained water resources and manage microclimate of their region. The forest regimes in Amazonian, Congo basin and South East Asian forest regions are under constant threat of degradation. The carbon dioxide concentration in the earths atmosphere has reached the highest ever seen by the human beings to 400 ppm level and mean surface temperature of earth has increased by 1oC in last fifty years. This study explores statistical relations for rainforest remaining in the earth and carbon dioxide concentration in the earths atmosphere as function of widespread human farm activities such as soya bean, corn and palm oil production as factors. The response surface methodology is used to analyze data from year 2000 to 2013 which shows that rate of world tropical rainforest degradation and CO2 concentration in the earths atmosphere increases with increase in world soy, corn and palm production and mathematical models predicting these relations were developed.
Keywords: Key words: Rainforest degradation, Response surface methodology, CO2 emissions, Climatic changes
- Utilising key climate element variability for the prediction of future climate change using a support vector machine Model
by Adamu Abubakar, Haruna Chiroma, Akram Zeki, Mueen Uddin
Abstract: This paper proposes a Support Vector Machine (SVM) Model to advance the prediction accuracy of Global Land-Ocean Temperature (GLOT), which is globally significant for understanding the future pattern of climate change. The GLOT dataset was collected from NASAs GLOT Index (C) (Anomaly with Base: 1951-1980) for the period 1880 to 2013. We categorise the dataset by decades to describe the behaviour of the GLOT within those decades. The dataset was used to build an SVM Model to predict future values of the GLOT. The performance of the model was compared with a multilayer perceptron neural network (MLPNN) and validated statistically. The SVM was found to perform significantly better than the MLPNN in terms of Mean Square Error and Root Mean Square Error, although computational times for the two models are statistically equal. The SVM model was used to project the GLOT from the pre-existing NASAs GLOT Index (C) (Anomaly with Base: 1951-1980) for the next twenty years (2013 - 2033). The projection results of our study can be of value to policy makers, such as the intergovernmental organisations related to environmental studies, e.g., the Intergovernmental Panel on Climate Change (IPCC).
Keywords: Global land-ocean temperature; Climate change indicators; Support Vector Machine
- Batch anaerobic digestion of simulated Bangladeshi food waste: Methane production at different inoculum-to-substrate ratios and kinetic analysis
by Shishir Behera, Mohd. Zafar, Tanziha Tasnim, Hung-Suck Park
Abstract: This study aims at investigating the anaerobic biodegradation characteristics of a typical simulated Bangladeshi food waste. Biochemical methane potential (BMP) tests carried out in 500 mL batch digesters showed the methane yields of cooked meat, cooked fish, boiled rice, vegetable and mixed food waste (MFW) to be 541, 402, 319, 274 and 484 ml CH4/gVS, respectively. The biodegradability of 87%, 83%, 75%, 76% and 82% were obtained for cooked meat, cooked fish, boiled rice, vegetable and MFW, respectively. At mesophilic temperature (35
Keywords: Food waste; ISR; Biodegradability; Methane yield; Kinetics
- Spatial Correlations and Distributions of Climatic Normals for Heating, Ventilation and Air-Conditioning in Turkey
by Ilhami Yildiz, Jin Yue, Tri Nguyen-Quang, Joshua Lowrey, Asena Yildiz
Abstract: Winter design dry-bulb temperatures at 99% and 97.5% frequency levels were developed and analyzed by multiple regression and spatial correlations developed using as regressors altitude, latitude and longitude. Winter design dry-bulb temperatures were negatively related to altitude and latitude. Latitude was the most influential regressor on the winter design dry-bulb temperature distributions. Summer design dry- and wet-bulb temperatures, and wet-bulb depressions at 1%, 2.5% and 5% frequency levels were also developed and analyzed by multiple regression and spatial correlations were developed using as regressors altitude, latitude and longitude. Altitude was the only statistically significant influential regressor on the summer design dry-bulb temperature distributions. Latitude was the most influential regressor on the summer design wet-bulb temperature distributions. Altitude was the only statistically significant influential regressor on the summer design wet-bulb depression distributions. Spatial correlations and distributions of prevailing wind speeds, mean daily ranges, and median of annual extreme temperatures were developed and mapped.
Keywords: Spatial correlations, spatial distributions, engineering climatic data, heating, ventilation, air-conditioning, HVAC, built environment, thermal comfort, Turkey
- Nitrous oxide emission from nitrogen fertiliser application in oil palm plantation of different stages
by Faradiella Kusin, Nurul Izzati Mat Akhir, Ferdaus Mohamat-Yusuff
Abstract: The release of nitrous oxide (N2O) from agricultural activities contributes to the increase of greenhouse gases in the atmosphere. In this study, the amount of nitrogen fertiliser used in an oil palm plantation of different stages (immature and mature) was estimated. Data of fertilising scheme at the oil palm plantation for oil palms varying in age (planted between 1986 and 2009) was used. Estimation of nitrous oxide emissions and the resulting CO2-equivalent (CO2-eq) emissions were calculated for each category of the oil palm. The amounts of N-fertiliser applied were between 102-137 kg N/ha. The resulting N2O emissions were between 19.07-22.10 kg N2O-N/ha, which corresponds to CO2-eq of between 2223.53-2700.42 kg CO2-eq/ha. It was also estimated that about 29.87-34.63 g CO2 were emitted per MJ crop. The N2O emission per ha oil palm was found to decrease from immature stage until maturely-developed stage spanning 20 years. The CO2-eq amount decreased only after 10 years of oil palm development. The results were also compared for synthetic nitrogen fertiliser-induced emissions within tropical regions.
Keywords: Nitrous oxide emission; CO2-equivalent; N-fertiliser; greenhouse gases; global warming; oil palm plantation
- Technical feasibility and application effect of coupled CO2 sequestration and EOR in tight sandstone oil reservoir
by Changlin Liao, Xinwei Liao, Wanglai Gao, Jing Chen, Huan Wang
Abstract: The increasing carbon dioxide (CO2) emissions in China have become a problem demanding prompt solution, and the performance of water flooding for tight sandstone oil reservoirs is unsatisfied and the production of single-well is low both of which has strong impacts on the economical benefit of oilfields. Therefore, this paper focused on the technical researches on CO2 sequestration and enhancing oil recovery (EOR) by CO2 flooding. Experiments and numerical reservoir simulation were conducted to study the technical feasibility and application effect of implementing CO2 sequestration and EOR in tight sandstone oil reservoirs. Several results were acquired as follows, small maximum pore throat radius, inefficient mercury withdrawal and large residual volume in pore together implied that the bad connectivity among pores would result in high percolating resistance in reservoir; when the saturation pressure met 21MPa, the viscosity dropped to 0.4264mPa.s a decrease of 49.53% over CO2 free situation; when the pressure was 13MPa, 15MPa and 17MPa the solubility of CO2 in formation water was 27.28 m3/ m3, 26.37 m3/ m3 and 27.28 m3/ m3, respectively; the displacement efficiency of miscible GCF in fractured cores was 49.1%, and it was 27.4% higher than water flooding; CO2 sequestration and EOR conducted through WAG-PMT turned out to have the highest NPV, and was followed by WAG. Several conclusions were obtained at last the low porosity, low permeability and defective connectivity among pores lead to the unsatisfied performance of water flooding; the physical properties of the oil are favorable for conducting CO2 sequestration and EOR; miscible flooding performs better than immiscible flooding; CO2 sequestration and EOR are easier to be implemented in the reservoirs with preferable homogeneity. A technology combining WAG with profile modification technology (WAG-PMT) was adopted to maximize the ability of CO2 injection and oil-producing for single well so that the economical benefit of CO2 sequestration and EOR can be improved more efficiently.
Keywords: CO2 sequestration; Enhanced oil recovery; Tight sandstone; Net present value; Technology
- Sustainable manufacturing and its application in machining processes: A review
by Amirmohammad Ghandehariun, Yousef Nazzal, Hossam Kishawy
Abstract: Consumption of natural resources and the pollution consequential to the life of technical products have caused major environmental concerns. Sustainable development in manufacturing industries offers a way for them to not only reduce the environmental impacts, but also improve the economic and social performance. A review of the literature on sustainability in manufacturing systems and processes is provided in this paper. This paper also presents a more detailed investigation of sustainability in machining. Environmental impacts of the machining system are evaluated and modern machining techniques for improving the sustainability performance of the process are presented. Finally, an analysis of the cutting process using thermodynamic concepts is provided. The ideas described in this paper facilitate achieving the objectives of sustainable development in manufacturing.
Keywords: sustainability; sustainable development; environmentally-benign manufacturing; sustainable machining; exergy analysis; exergy efficiency; metal cutting; optimization
- Mineral Resources for In-Situ Carbonation of CO2 in the Arabian Shield
by Ali Sahin
Abstract: Commonly adopted storage techniques to reduce CO2 concentration in the atmosphere have significant limitations in terms of cost, monitoring, and safety. Thus, innovative techniques such as carbonation involving the reaction of CO2 with some silicate minerals have been proposed. The carbonation ensures permanent fixation rather than the temporary storage, and hence provides safe, low-cost, and sustainable method for storing CO2. Moreover, the resulting carbonate minerals are stable over geological time periods.
Because of its favorable geological setting, Saudi Arabia has a considerable potential for carbonation minerals. Such minerals are associated with ultramafic and mafic igneous rocks within the Arabian Shield which covers extensive areas in the western part of the country. After describing the carbonation process and suitable minerals, their spatial distributions in various rock types are outlined. Finally, the in-situ carbonation of these minerals and the expected benefits are discussed.
Keywords: In-situ Carbonation, Carbonation Minerals, Mineral Sequestration, CO2 Sequestration, Global Warming, Arabian Shield
- The effects of livestock methane emission on the global warming: A Review
by Mourad Baghour, Kaoutar Ben Chekroun, Azizi Ghizlane, Abdelmajid Moumen
Abstract: The greenhouse gas (GHG) emissions from the agricultural sector account for about 25.5% of total global anthropogenic emission. Methane is one of the most important GHGs and it has 21 times more global warming potential than carbon dioxide. Ruminant livestock contributes the major proportion of total agricultural emission of methane. The CH4 produced by ruminants is not only related to environmental problems, but is also associated with energy losses. This article reviews various attempts to reduce methane emission, mainly through improved genetic selection, modification of dietary composition, or through rumen microbial manipulation. Vaccines against methanogenic bacteria or monensin as antimicrobial are widely used in ruminants to improve performance. Increases in the understanding of the environmental impacts of livestock farming and methods of mitigating them are likely to occur and more effective approaches to designing systems of mitigation will be developed.
Keywords: Keywords: global warming; methane; ruminants; agricultural sources of methane; greenhouse gases; methanogenesis; plant extracts; defaunation; ionophore; dietary composition; animal selection; vaccine; bacteriocins; immunization; mitigation strategies.
- A Framework for the Assessment of Reservoir Operation Adaptation to Climate Change in an Arid Region
by Mohammad Ebrahim Banihabib, Khadijeh Hasani, Ali Reza Massah Bavani, Kamran Asgari
Abstract: It is essential to assess the adaptation of reservoir operation to climate change in arid regions. Main objective of this research is to propose a framework for assessment of Reservoir Rule-Curve (RRC) adaptation for climate change scenarios.The framework is applied to an arid zone in Iran and consists of the three models: downscaling, rainfall-runoff and reservoir optimization models. LARS-WG is tested in 99% confidence level before to using it as downscaling model.Seven Artificial Neural Network models are proposed, examined and compared with IHACRES to find proper rainfall-runoff model for arid zone. Current and adapted reservoir rule curves are derived by Dynamic Programming Optimization. The results demonstrate capability of proposed framework in assessment of adaptation and show that global warming negatively influences proposed index (water supply index) in normal and wet years, but has positive influence for dry years. It also improves reservoir reliability, but it cannot restore current reliability.
Keywords: Artificial neural network; climate change; adaptation; downscaling; rule curve; reservoir operation.
- Management of Greenhouse Gas Emissions from Maritime Operations Challenges and Mitigation Opportunities
by A. Khondaker, Syed Rahman, Rouf Khan, Karim Malik, Musah Muhyedeen
Abstract: Maritime activities are one of the important sources of Greenhouse Gas (GHG) emissions. By 2050, the GHG emissions are expected to increase by at least 50% over the 2007 levels. The current mitigation measures include adoption of appropriate energy sources including conventional, renewable, and alternative energy sources or their blends; development and application of cleaner technological and operational mechanisms; adoption of intermodal shifting and demand management based approaches; and development of sustainable shipping governance system. Each mitigation measure is related to certain implementation challenges. This study investigated different estimations of greenhouse gas emissions, the relevant mitigation options, and associated challenges, and analyzed international mitigation governance system, and proposed approaches to overcome barriers of mitigation options. The pertinent global community should take intense initiatives to improve the understanding of respective merits of different mitigation options, establish reduction potential and effectiveness of each viable measure, and assess the potential impacts of mitigation measures with particular reference to the global trade and market distortions. The persuasive cooperation with strong commitment among decision makers and stakeholders will ensure development and implementation of sustainable mitigation measures.
Keywords: Greenhouse Gas Emissions; Maritime Operations; Mitigation Measures; International Maritime Organization
- Vulnerability and adaptation assessment a way forward for sustainable sectoral development in the purview of climate variability and change: Insights from the coast of Tamil Nadu, India
by Ramachandran Andimuthu, Dhanya Praveen, Radhapriya P, Divya S.K, Remya K, Palanivelu k
Abstract: This paper attempts to identify the most vulnerable coastal districts of Tamil Nadu with respect to climate variability. This research has taken three sectors namely Groundwater, Agriculture, and Fisheries sector for consideration. It reveals that individual sectors vulnerability levels vary widely across the districts due to the differences in its physical exposure, sensitivity, and adaptive capacity. In the groundwater sector Villupuram and Thanjavur districts showed very high vulnerability. Ramanathapuram and Thoothukudi district exhibited highest vulnerability with respect to agricultural sector. In the fisheries sector Thoothukudi and Villupuram district demonstrated high levels of vulnerability. From the overall composite vulnerability assessment. Thoothukudi and Villupuram districts needs extra care and immediate attention as it falls under high to very high vulnerability category in all the three sectors among 13 coastal districts. It implies that need for strengthening the adaptive capacity to tackle the present situation of climate variability and change. Adaptation options have been identified and prioritized through interaction with the stakeholders using pair wise ranking of adaptation matrix. Public awareness on conservation of water resources, changes in the farming practices, improving water efficiency and diversification of market& products and diversified livihood portfolio got first priority in the adaptation. Therefore the result of this assessment recommends that adaptation policies have to be incorporated with sustainable development strategies take these sectors forward.
Keywords: Climate variability, Vulnerability,Indicators, Exposure, Sensitivity, Adaptive capacity, Adaptation Matrix
- Including an environmental quality index in a demographic model
by Maria Sanz, Antonio Caselles, Joan Micó, David Soler
Abstract: This paper presents a new well-being index which allows environmental quality to be measured through CO2 emissions, renewable energies and nuclear power. Its formula derives from a geometric mean used to calculate which things in the human production system warm the planet and which do not. This index has been introduced into a gender-defined stochastic population dynamic mathematical model which measures well-being in a country. The main variables in this model are rates of death, birth, emigration and immigration, as well as three UN indices: Human Development Index, Gender Development Index and Gender Empowerment Index. This model has been extended with variables that allow an environmental quality evaluation, and it has been validated for Spain during the 2001-2010 period. Moreover, a sensitivity analysis has been carried on the simulated future trend (2011-2020) to see which environmental quality variables refer more to deaths, births or the Human Development Index.
Keywords: Environmental quality; demographic model; well-being
- COMPARISON OF ALTERNATIVE APPROACHES OF ESTIMATING ABOVE-GROUND TREE BIOMASS IN A FOREST ECOSYSTEM OF TURKEY
by Sedat Keles
Abstract: This paper discusses different above-ground biomass estimation approaches in a forest ecosystem consisting of one tree species in Turkey. The first and second approaches are based on the use of growing stock volumes converted to above-ground biomass using forest type-level and species-specific biomass factors, respectively. The third and fourth approaches use different species-specific biomass regression equations. These equations used for estimating above-ground biomass are based on diameter at breast height in the first one, tree height as well as diameter at breast height in the second one. Results of above-ground biomass estimation approaches showed that more total above-ground biomass estimated in biomass expansion factors than that in biomass regression equations. It is concluded that species-specific biomass regression equations that are more practical, accurate and useful should be developed.
Keywords: Forest ecosystem, Above-ground biomass, Regression model, Biomass factors, Climate change, Global warming, Carbon sequestration, Forest protection, Greenhouse gases
- Effects of Regional Climate Variability on the Prevalence of Diseases and their Economic Impacts on Households in the Lake Victoria Basin of Western Kenya
by Gabriel O Dida
Abstract: Climate variability has a strong influence on disease prevalence and subsequently on the economic wellbeing of the affected households, especially in the low lying Lake Victoria basin of Kenya. This paper focuses on the prevalence of diseases and their economic impacts on households living in six climatically different regions within the Lake Victoria Basin of Western Kenya. The six study regions were clustered into three groups based on their climatic conditions as follows; areas prone to droughts namely Rarieda and Bondo; areas prone to floods namely Budalangi and Nyando; and areas with relatively good weather namely Bomet and Kisii central. A total of 480 adult respondents, aged between 18 and 80+ years were randomly selected to represent the households. Respondents were interviewed and the effects of prevailing climatic conditions on the prevalence of diseases within the previous 12 months and their direct and indirect economic implications on the households compared and statistically analyzed. Malaria, respiratory tract infection, typhoid, pneumonia and diarrhea were the major diseases among the Lake Victoria basin (LVB) inhabitants. The annual disease frequency per household was highest in Budalangi, a flood prone region; and lowest in Bomet, a region with relatively good weather. There was a significant difference in disease frequency in the three climatically different regions (flood prone, drought prone, and favorable weather) (p <0.001). High medical bills (72%), inability to work (24%), too much time spent on the sick (3%) and slowed economic development (1%), were cited as some of the impacts of diseases on the household by the respondents. High medical bills were cited by most respondents (over 90%) from Budalangi region, and 62% of respondents from Nyando (both of which are flood prone regions). The findings reveal the often unseen or ignored subtle effects of adverse climatic conditions on economically vulnerable communities in the Lake Victoria basin (LVB) and elsewhere, and recommends flood/drought prevention and mitigation strategies and awareness creation to better cope with the adverse climatic conditions.
Keywords: Climate variability; disease prevalence; economic impact; Kenya; Lake Victoria basin
- Forecasting CO2 emission of Turkey: swarm intelligence approaches
by Eren Ozceylan
Abstract: It is known that among the various greenhouse gases, CO2 is the most frequently implicated in global warming and climate change. Therefore, there is a need for developing efficient quantitative tools that allow forecasting CO2 emissions. This paper presents application of PSO (particle swarm optimization) and ABC (artificial bee colony) techniques to estimate CO2 emission in Turkey, based on socio-economic indicators. The models are developed in three forms which are linear, exponential and quadratic. PSOCO2 and ABCCO2 (PSO and ABC CO2 estimation models) are developed to estimate the future CO2 emission values based on energy consumption, population, gross domestic product (GDP), and number of motor vehicles data. Emitted CO2 emission in Turkey from 1980 to 2008 is considered as the case of this study. While first 25 years data of 29 years data is used for validation of four models, full data is used for future projections. SSE (sum square error) is used as a fitness function in proposed models. Finally, CO2 emission in Turkey is forecasted up to year 2030 under different scenarios.
Keywords: artificial bee colony, CO2 emission, forecasting, particle swarm optimization, Turkey.
- An Optimization Model for Electric-Environmental System Planning -a case study of Heilongjiang Province, China
by Zhang Yang, Li Wei, Huang Guohe, Fu Zhenghui
Abstract: In this study, an inexact optimization model is developed for regional power system management under uncertainty, where interval-parameter programming and two stage-stochastic programming were integrated in a framework for dealing with the long-term energy systems planning. The developed method can deal with multiple forms of uncertainties and dynamics related to capacity expansions within energy management systems. The proposed model was applied to a case study of power system management and air pollutants mitigation in Heilongjiang Province, China. Six scenarios are considered based on different emissions reduction and mode of power structure adjustments. The results show that in order to keep a sustainable development and safe power/energy supply, a diversified power structure (primarily on coal power generation, supplemented by renewable energy generation) would be established in the region. In addition, the pollutants-emission control is more effective than power structure adjustment for improving rationality of the electricity economic budget in Heilongjiang Province. The model is helpful for supporting adjustment of allocation patterns of regional energy resources, formulating energy structure and energy consumption of local policies.
Keywords: energy model; two-stage stochastic programming; multi-scenario; emission reduction; energy structure adjustment.
- Measuring the Evolution of Chinas Low Carbon Economy Performance
by Xiaohong Chen, Xiang Liu, Desheng Wu
Abstract: In order to develop low carbon economy effectively and efficiently, it is equally important to pay attention to the outcome of developing low carbon economy and the process to reach this outcome. This paper takes carbon productivity (CP) and low carbon economy efficiency (LCEE) to respectively evaluate the outcome-oriented performance (the actual status) and process-oriented performance (the process to reach this status) of low carbon economy development in China. The results show that although the outcome-oriented performance of Chinas low carbon economy is improving, the process-oriented performance of it experiences a continuous decrease from 2000 to 2011, which signifies that GDP and carbon emissions are unevenly developed and the resources input are ineffectively and inefficiently used. Moreover, the determinants of CP and LCEE in different areas of China are analyzed by grey relational analysis. The results suggest that the amount of R&D funding and financial expenditure should be improved to enhance the efficient and effective utilization of inputs to reach balanced development between GDP and carbon abatement for all areas.
Keywords: low carbon economy; outcome-oriented performance; process-oriented performance; efficiency; carbon productivety; determinants; undesirable ouput; DEA model; grey relational analysis; China
- Intelligent Analysis of Global Warming Effects on Sea Surface Temperature in Hormuzgan Coast, Persian Gulf
by Saeed Samadianfard, Reza Delirhasannia, Masoud Torabi Azad, Sima Samadianfard, Mehrdad Jeihouni
Abstract: As scientific and economic interests in climate prediction and predictability have increased considerably in recent years, a need for global sea surface temperature (SST) prediction for use in global forecasts for climate variability studies have emerged. This paper examines the potential of gene expression programming (GEP) in estimation of sea surface temperature from global mean temperature (GMT) in comparison with linear regression (LR), polynomial regression (PR) and exponential regressions (ER). In the present study, global mean temperature and sea surface temperature data for the point with latitude of 26.5
Keywords: Climate change; Global warming; Persian Gulf; Sea surface temperature
- Coal Gas Adsorption/Desorption Isotherms versus Diffusion Process
by Cristina Fernanda Rodrigues, Maria Alzira Pimenta Dinis, Manuel João Lemos de Sousa
Abstract: Gas diffusion coefficient is a fundamental parameter to define the rate of carbon dioxide (CO2) injection and the CO2 transport in the coal pores/matrix, in the scope of geological storage/sequestration of CO2 in coal seams (unmineable deep seams or abandoned collieries). The rate of gas released is crucially important in CO2 geological storage/sequestration programmes injection.
In the present work, the authors studied two meta-anthracite samples from Douro Coalfield (NW of Portugal) in which classical sorption isotherms were carried out, using CO2 only. Samples were submitted to different pressure steps during both adsorption and desorption processes. Diffusion coefficients were subsequently determined from sorption results, which permitted not only to study swelling/shrinking effects related to sorption processes, but also to demonstrate that whenever the CO2 is adsorbed in the coal pores/matrix it will be enduringly fixed up to, approximately, pressures of 32 bar in sample A and 34 bar in sample B. Since the gas release process it intensely related to diffusion coefficients, it is crucial to define their evolution on the two analyses reported in this paper. So, during adsorption, diffusion coefficients decrease in sample A from 4.66736E-08 to 1.23490E-09 cm2/sec (6.72 and 48.13 bar) and during desorption they increase from 7.61829E-09 to 1.09908E-08 cm2/sec (45.68 and 11.48 bar). In sample B, diffusion coefficients decrease from 2.47409E-08 to 2.11813E-09 cm2/sec (7.53 and 47.17 bar) in adsorption and increase in desorption from 1.48767E-09 to 2.83736E-08 cm2/sec (42.22 and 7.71 bar).
Keywords: Gas diffusion coefficient; CO2 geological sequestration; isotherms; Sorption (Adsorption/Desorption.
- Dynamics of Mangrove Diversity influenced by Climate Change and consequent accelerated Sea Level Rise at Indian Sundarbans
by Abhiroop Chowdhury, Pranabes Sanyal, Subodh Maiti
Abstract: Mangroves are salt stress resistant ecosystem dominating the coastal/estuaries of tropics and subtropics repeatedly exposed to impact of natural disasters namely cyclones/storm surges and the problems related to sea level raise due to climate change and global warming. The foremost effect of sea level raise and cyclonic regimes is the salt water intrusion/inundation into the estuaries. This temporal study on biodiversity and surface water salinity (both High and Low tide), over two main seasons (Pre and Post monsoon) has been conducted from 2008 to 2013, to shed light into the effect of a severe cyclone, AILA (2009) and fluctuations in surface water salinity due to sea level raise, on the community structure of mangroves in Indian Sundarbans. It is observed that raise in salinity level accentuates the abundance of salt tolerant species namely Avicennia marina, Suaeda maritima and decreased abundance of Rhizophora mucronata. But the exclusion of rare mangrove species (e.g. Aglaia cuculata, Brownlowia tersa, Heritiera fomes, Kandelia candel, Nypa fruticans) is also evident, facilitating the increased abundance of resistant and invasive flora, along with other associated flora (Clerodendron inerme, Derris trifoliata and Phoenix paludosa). Management solutions have also been suggested, keeping in mind, the current conservation policies, which could help the ecologists and conservationists to properly combat these problems and protect this sensitive ecosystem.
Keywords: Sundarban, Delta, Mangrove, Biodiversity, Conservation, Climate change, Sea level raise, Cyclone, Phenology, Salinity, Management Solutions
- Analysis of solutions alleviating CO2 emissions intensity of biogas technology
by Wojciech Budzianowski
Abstract: Biogas is a multi-purpose technology capable of harvesting renewable energy, converting organic wastes and supplying low-carbon biofuels for transport which all mitigate atmospheric carbon emissions. State-of-the-art biogas CHP technology is however characterised by relatively significant life cycle CO2 emissions intensity typically ranging from 200 to 450 gCO2eq/kWhe, depending on specific feedstocks and configurations. Due to high CO2 content in biogas, the direct biogenic CO2 emissions intensity of a biogas CHP plant is about 700 gCO2/kWhe, which is greater than the direct CO2 emissions intensity of natural gas combustion and it is comparable only with coal combustion. Therefore, in order to meet requirements of future low-carbon energy systems, solutions capable of cost-effectively mitigating various parasitic or even biogenic carbon emissions from biogas are needed. This study analyses the following categories of solutions alleviating CO2 emissions intensity of biogas technology: (i) anaerobic digestion (AD) of organic matter with increased CH4/CO2 selectivity, (ii) biological H2 generation from organic matter, (iii) AD with biogenic CO2 recycling, (iv) biogas utilisation with facilitated CO2 sequestration and (v) low-carbon biofuels from biogas. For each of these categories solutions aiming at alleviating CO2 emissions intensity are provided and analysed. Finally, optimal embedding in the economic environment is discussed.
Keywords: biogas, solution, CO2 emissions intensity, low-carbon energy, anaerobic digestion
- Long-Term Mean Monthly Temperature Trends of the United Arab Emirates
by Ali Umran Komuscu
Abstract: The Gulf region, including the United Arab Emirates (UAE), has been experiencing warming trends since late 1980s, an era of rapid economic development in the region. This study investigates non-stationary behaviour of the long-term mean monthly temperature series of the UAE by time series analysis. Surface temperature data at six coastal and internal stations, for the period 1983-2012, have been used in the study. The study indicates that the period after 1990s is distinctly characterized with definite rising trends in the temperatures in majority of the stations, with exception of the Al Ain station which indicated cooling temperature trends. Cumulative warming varied between 0.3 and 2.8
Keywords: temperature trends; United Arab Emirates; autocorrelation; periodogram; spectral analysis
- Green hydrogen energy system: A Policy on reducing petroleum based global unrest
by Adnan Midilli
Abstract: This paper investigates the role of green hydrogen energy system in reducing petroleum based global unrest. For this purpose, in terms of the policy parameters, the followings are discussed i) the main factors accelerating petroleum based global energy imbalance and the negative effects resulting from the petroleum based global unrest, ii) possible advantages of green hydrogen energy system, iii) the key driving forces and their roles for green hydrogen based global stability, iv) qualitative evaluation of the effects of petroleum and green hydrogen consumption on some global issues. Consequently, it can be said that green hydrogen energy system will be a key tool to minimize petroleum based global unrest and to improve the green hydrogen based global stability. Thus, it is suggested that green hydrogen energy system should be gradually encouraged by governmental bodies and other authorities for improving and ensuring the green hydrogen based global stability and sustainability.
Keywords: Green hydrogen, hydrogen utilization, petroleum consumption, hydrogen energy system, global stability, global unrest, sustainability.
- Sequestration of carbon dioxide by red mud through direct mineral carbonation at room temperature
by Rushendra Revathy T.D, Palanivelu K, Ramachandran A
Abstract: In the developing countries, power generation is likely to be primarily dependent on coal reserves in the coming years, thereby they face the scenario of upsurge in CO2 emissions. Carbon capture and storage (CCS) technologies are considered as a promising tool to mitigate CO2 emissions. In this work, direct mineral carbonation capacity of red mud (RM) has been studied which is one of the major solid waste produced from the non-ferrous industries in the country and that is largely land filled. Carbonation (dry and wet) studies were performed at low pressure (1 -10 bar) conditions and at room temperature using a simple methodology in a batch reactor with pure CO2 gas. The dry route resulted in a maximum sequestration capacity of 5.16 g of CO2/kg of RM (10 bar and 3 h), whereas wet phase aqueous carbonation route yielded 20.09 g of CO2/kg of RM (liquid to solid (L/S) ratio- 0.6, 6 bar and 1 h). The carbonated samples were characterized using Fourier transform infrared (FT-IR), X-ray diffraction (XRD) and scanning electron microscope (SEM) analysis which evidenced the carbonation process. Thus it can be concluded that the solid waste that generated in ample quantities pose to be a promising option towards climate change mitigation.
Keywords: Carbon capture and storage; carbon dioxide; mineral carbonation; gas-solid carbonation; aqueous carbonation; red mud.
- Regional characteristics of CO2 emissions from Chinas power generation: Affinity Propagation and Refined Laspeyres Decomposition
by Wei Sun, Yujun He, Hong Chang
Abstract: The Chinese power sector plays a vital role in national emissions reduction goal due to its large contribution to overall emissions. This paper explores the regional similarities and disparities of power generation emissions among 30 provinces. First, the Affinity Propagation (AP) algorithm is applied to find the similar characteristics in emissions among 30 provinces. The clustering results of CO2 emissions indicate that the 30 provinces are divided into five clusters in 1997 and seven clusters in 2012 based on four indicators (generation structure, energy intensity, GDP per capita and electricity intensity). Then, the regional differences in driving forces on CO2 emissions from power industry are examined using refined Laspeyres decomposition model. Results showed that there are significant contribution differences of five indicators (power generation emission coefficient, generation structure, electricity intensity, economy and population) on power generation emissions among different provinces. The provincial emissions reduction target and supporting policies for power industry should be customized and consistent with the actual situations considering the similarity and differences in emission characteristics.
Keywords: Affinity propagation; refined Laspeyres decomposition; power generation; CO2 emissions
- A review on improvement of coal-fired power plants and environmental benefits of ash utilization
by Selcuk Samanli, Haluk Celik, Ozcan Oney, Yasar Can
Abstract: Electricity generation in coal fired power plants produces large amount of residues. These materials are known as coal combustion products (CCPs) and can release pollutants to the environment. However, CCPs are environmentally and technically suitable for uses in many areas. The utilization of CCPs in these areas helps to reduce the overall harmful effects of coal combustion for electricity generation by stabilizing the environmentally toxic pollutants. This study focused on bottom ash (BA) and especially fly ash (FA). BA is used as a source of aggregate in concrete. FA is used as a pozzolanic additive to Portland cement concrete.
The current paper reviews the general characteristic features of coal bottom ash and fly ash. It reveals the possible usage areas of improved ash and presents the general approaches have been developed to obtain improved fly ash. The recycling of coal combustion ash provides significant environmental benefits. Electrostatic separator with tribocharging technique has great potential for utilization of coal ash. It significantly contributes to reduce fly ash disposal problems. In recent years, triboelectrostatic separators have increased significantly for the feasibility and success of the implementation of the electrostatic separation. Studies carried out by various researchers on triboelectrostatic separation for utilization of fly ash were also compiled in this article.
Keywords: Bottom ash; fly ash; improved fly ash; triboelectrostatic separator.
- Equilibrium and kinetic adsorption study of aqueous basic dye solutions using waste foundry sand
by Semra Çoruh, Elif Hatice Gürkan
Abstract: The aim of this study is to evaluate adsorption kinetics, isotherms and thermodynamic parameters of crystal violet (CV) and methylene blue (MB) dyes from aqueous solution using waste foundry sand Adsorption studies were carried out at different initial dye concentrations (12.5 - 400 mg l-1), contact time (5 - 240 min), pH (3.0 9.0), sorbent doses (0.125 - 2 g l-1) and adsorption temperature (20
Keywords: Waste foundry sand, adsorption, basic dye, isotherm, kinetic, thermodynamic
- Simulation of CO2 adsorption-separation from an N2/CO2 gas mixture in a Fixed MgMOF-74 Column
by Mohamed A. Habib, Rached Ben-Mansour, B. O. Eyitope, A. M. P. Peedikakkal
Abstract: A computational study of adsorption-separation of CO2 from an N2/CO2 gas mixture is presented in this paper. A detailed one-dimensional, transient mathematical model has been formulated to include the heat and mass transfer, the pressure drop and multi-component mass diffusion. The model has been implemented on a MATLAB program using second order discretization. Validation of the model was performed using a complete experimental data set for carbon dioxide separation using activated carbon. Simulation of the adsorption breakthrough experiment on fixed bed has been carried out to evaluate the capacity of Mg-MOF-74 for CO2 capture with varying feed gas temperature of 301K, 323K, 373K and 423K. The results show the superiority of MOF adsorbent in comparison to activated carbon. The simulated breakthrough time for CO2 on Mg-MOF-74 with feed temperature and pressure of 301K and 1.02bar respectively is about 500min as compared to 50min for Activated Carbon. The amount of CO2 adsorbed on Mg-MOF-74 under this condition is 6.43mole per kilogram of adsorbent. The maximum temperature exhibited in the system is at the bed exit with a value of about 356K after about 500min of simulation.
Keywords: CO2 adsorption, carbon capture, carbon dioxide, CO2 separation, Mg-MOF-74
- The evaluation of CO2 emissions mitigation scenarios for Turkish electricity sector
by Betül Özer, Selahattin İncecik, Erdem Görgün
Abstract: This study presents the results on the simulations of the scenarios based on the CO2 emission reduction of the electricity sector in Turkey, utilizing the Long range Energy Alternatives Planning system (LEAP) model, and the mitigation costs of the scenarios. Three scenarios including Baseline Scenario, (Scenario 1) and the two mitigation scenarios (Scenario 2 and Scenario 3) are employed. The Scenario 1 is based on the continuation of the recent electricity generation composition. Scenario 2 is established for the evaluation of all the renewable energy potential, except solar, of Turkey while Scenario 3 included all the renewable and nuclear energy. The CO2 emission intensity decreased by 20.5% and 35.6% for the Scenarios 2 and 3 in 2030, respectively compared to the Baseline Scenario. The CO2 emission mitigation costs are found 17 $/ton CO2 and 40 $/ton CO2 for the Scenarios 2 and 3, respectively through 2010 to 2030.
Keywords: electricity sector, CO2 emission mitigation scenarios and costs, LEAP model, renewable and nuclear energy, Turkey
- Optimum insulation thickness for piping system using exergy and environmental methods
by Emin Açıkkalp, Gülcan Özel, Burak Görgün, Hasan Yamık, Necmettin Caner
Abstract: Optimum insulation thickness for a piping system is investigated using a novel method that combines exergy and environmental is analyzed. Analyses are conducted by using the rockwool and glasswool as insulation materials. Investigation is performed for the different nominal pipe sizes (NPS or Diameter Nominal: DN) of 50, 100 and 150. This study was carried out for Bilecik in Turkey. The environmental impacts of the various parameters are described. Results for the environmental impact of the system, the net environmental saving, exergetic heat loss, the net exergy saving, fuel consumption and CO2 emissions according to insulation thickness are presented. Results show that optimum points are calculated as 0.109 m, 0.126 m and 0.137 m for DN 50, 100, and 150, respectively for the glasswool. Optimum insulation thickness for the rockwool was determined as 0.064m, 0.073 m and 0.079for DN 50, 100, and 150, respectively.
Keywords: Optimum insulation thickness, exergy analysis, environmental impact, life cycle assessment.
- EVOLUTION OF HIERARCHY OF SETTLEMENTS IN RIVER-BASIN SCALE TOWARDS CLIMATE CHANGE
by Zekiye Yenen, Cenk Hamamcıoğlu
Abstract: Abstract: Fundamental impacts of climate change due to global warming reveal undeniable consequences on planning for future. Taking the question have we cognized to incorporate the effects of climate change in planning yet? into account, this paper brings up the factors of human activities precipitating climate change and its probable impacts on the hierarchy of settlements to the agenda in order to stimulate planners, policy makers, entrepreneurs and other stakeholders to be ready for different possibilities with flexible approaches and efficient adaptation policies. In this context, two main projected scenarios stated by the UNFCCC (2001) and IPCC (2013)s reports are predicted and discussed on the future characteristics of settlement system to undergo a change in the case of G
Keywords: Key Words: basin; river basin; basin-based approach; climate change; hierarchy of settlements; GĂ¶ksu Basin; Mediterranean; Turkey.
- A Methodology and Assessment for the Viability of Trigeneration Systems to Reduce Emissions
by Mehdi Aghaei Meybodi, Chanel Gibson, Masud Behnia
Abstract: Trigeneration systems allow for an efficient way of consuming fossil fuels and therefore utilisation of such systems is amongst the adopted measures to address environmental issues. Carbon pricing was introduced in Australia in July 2012 and subsequently repealed by the newly elected government due to its questionable effectiveness. In this paper, a thermo-economic methodology was developed to attempt to provide an insight into the optimisation and economics of small and medium scale turbine-based trigeneration systems under three environmental policies through the application of two case studies. A comprehensive sensitivity analysis was performed. The results indicate that carbon pricing is a sound policy to make the installation of small scale trigeneration systems economically favourable. All medium scale trigeneration systems in the study were uneconomical, although the system was marginally (1%) more profitable under the new policy than under carbon pricing. It was also observed policy concerning feed-in tariffs should be revised.
Keywords: carbon pricing; combined cooling heating and power systems; emissions trading schemes; emissions reduction; gas turbine; global warming impacts; microturbine; partial load operation; turbine-based trigeneration systems; thermo-economic analysis
Special Issue on: "Emerging Perspectives on Loss and Damage"
- by Mirza Nomman Ahmed, Peter Michael Schmitz
Abstract: According to the climate vulnerability index Pakistan is ranked 12th globally and economic losses of approximately 4.5 billion dollars for the entire economy are anticipated. However, all these future estimates of losses for Pakistan do not consider past adaptations by the farmers in their calculations and thus tend to overestimate climate change induced losses. This paper contributes to the literature by studying the effectiveness of households adaptation and coping measures regarding the prevention of loss and damage using choice-modelling. In order to assess, whether loss and damage is likely to occur in future and to determine, whether crop-cultivating farmers have well adapted, simulations are run. Farmers are found to adjust their crop choices considering climate and expected income. If farmers adapt, benefits exceeding 300 million dollars are possible for the crop sector. In the business as usual scenario, losses between 4 and 12 million dollars (2030/2090) are found. The findings hint towards well-directed adaptations of farmers in Pakistan, preventing loss and damage.
Keywords: Developing Countries; Environmental Impact; Hedonic; Global Warming; net revenue and adaptations; agriculture; Pakistan; Structural Ricardian Model; Crop Switching
- by Swenja Surminski, Jillian Eldridge
Abstract: Private sector engagement, particularly in relation to public policy based action and strategy, has become a buzz word in most policy areas, but this is often accompanied by a lack of clarity on roles and responsibilities between public and private sector. We investigate this for the new United Nations Framework Convention on Climate Change (UNFCCC) work stream on addressing loss and damage (L&D) from climate change. This paper presents evidence gathered from official submissions by Parties and other bodies to the UNFCCC, the small but growing L&D literature, and experience from the related fields of Disaster Risk Reduction (DRR) and Climate Change Adaptation (CCA). The results from the study show: a degree of vagueness in outlining the role the private sector, but expectation that they will support the emerging L&D framework through knowledge, skills and resource. Private sector engagement is mainly seen in the context of utilizing private sector expertise based in developed countries, rather than assessing current and future impacts on the growing private sector in developing countries. Unclear conceptual boundaries of L&D, DRR and CCA are posing a challenge for stakeholders. While evidence of existing engagement in the L&D debate is noticeable for the insurance industry, there remains only a limited understanding on how to actually measure the effectiveness of such private sector engagement. Creating greater clarity on expectations of and the ability to deliver by the private sector would be important tasks for the UNFCCC to focus on.
Keywords: Loss and Damage; private sector; stakeholder engagement; climate change; insurance; UNFCCC
- by David Wrathall, Anthony Oliver-Smith, Alexander Fekete, Ebru Gencer, Patrick Sakdapolrak, Marqueza Lepana
Abstract: In the space of a few short years, the UNFCCC process has given birth to a new policy regime, the Warsaw International Mechanism on Loss and Damage, to prepare for the adverse consequences of climate change to vulnerable societies. The justification for this policy is that a residual domain exists wherein climate change adaptation, disaster risk reduction and public/private risk transfer mechanisms are insufficient for peoples and places overwhelmed by climate impacts. We link this domain conceptually to scientific research on climate change impacts, and specifically to research on limits to adaptation. The normative position of this academic debate is generally oriented toward the need for transformative adaptation. This paper aims to anticipate the challenges that the Warsaw Mechanism will encounter achieving transformation in practice. Both policy design (as it is taking shape) and implementation face a set of interrelated conceptual and operational problems that challenge whether resources can and will address adverse consequences among the most vulnerable. In the end, loss and damage policy may suffer from the same limitations as adaptation policy: it is concerned with the reconstitution of vulnerable states of being, rather than their transformation into something more fundamentally conducive of wellbeing and development.
Keywords: Climate change; vulnerability; adaptation; compensation; loss and damage
- by Torsten Welle, Joern Birkmann
Abstract: Preventing and reducing loss and damage due to extreme events is an important topic for the international community especially in the context of climate change negotiations and disaster risk reduction. The paper outlines the latest state-of-the-art approaches to assess loss and damage and the risk of loss and damage. Against this background, a more in-depth analysis is provided on how to assess the risk of loss and damage in different country groups (i.e., World Bank income groups) focusing on selected slow- and sudden-onset climate-related hazards using the concept of the WorldRiskIndex. The results underscore that the risk of loss and damage for low- and high-income countries are significantly different, but also that global risk patterns differ significantly regarding sudden-onset versus slow-onset hazards. In the first step of analysis, the results show that not only does exposure to extreme events influence the risk of loss and damage, but equally important are the vulnerability and adaptive capacities of societies. The second step of analysis shows that target-oriented adaptive strategies to the various impacts of climate-related hazards are crucial in reducing the respective risk of loss and damage.
Keywords: loss and damage, assessment of risk of loss and damage, mapping, slow- and sudden-onset climate-related hazards
- by Erin Roberts, Saleemul Huq
Abstract: This paper will chronicle the history of rise of loss and damage in negotiations under the United Nations Framework on Climate Change and the role of the Intergovernmental Panel on Climate Change in bringing about this paradigm shift. Over the past two decades the global climate change regime has shifted from a focus primarily on mitigation, to both mitigation and adaptation and finally to the current era in which loss and damage has emerged as a key fixture on the agenda with the establishment of the Warsaw international mechanism on loss and damage at the 19th Conference of the Parties in November 2013. This shift can attributed to the realisation that there will be some unavoided impacts of climate change that will need to be addressed by the global climate regime.
Keywords: UNFCCC; loss and damage; climate change; negotiations; mitigation; adaptation; global climate regime; IPCC
- by Erin Roberts, Stephanie Andrei
Abstract: As climate change impacts worsen, losses and damages incurred in both developing and developed countries will continue to increase. While enhancing mitigation and adaptation efforts will influence the level of loss and damage avoided in the future, historical emissions have locked in a certain level of climate change, making some residual losses and damages inevitable. Loss and damage from slow onset processes like sea level rise will ultimately require some individuals to migrate and entire countries, to relocate. Through examples from Kiribati and Alaska this paper will highlight the complexity involved in migrating and relocating and recommend interventions for easing the resettlement process.
Keywords: loss and damage; slow onset processes; sea level rise; climate change; migration; relocation; adaptation; Alaska; Small Island Developing States; Kiribati; non-economic losses; culture
- by Melanie Gall
Abstract: This paper explores the suitability of disaster loss databases for documenting impacts of climate change particularly those related to extreme weather and slow onset events. The goal is to clarify the utility, quality, and relevance of disaster loss metrics in the context of climate-sensitive hazards such as floods, tropical cyclones, droughts, and so forth. Although, disaster loss databases hold great potential for assessing some of the impacts from climate change, several modifications are required to enhance the utility of existing disaster loss databases, primarily in regard to data availability and quality. In order to effectively utilize disaster loss databases, loss metrics and hazard classifications should be broadened, time horizons for loss estimation expanded as well as loss estimation techniques improved along with a coordinated development and implementation of data and database standards.
Keywords: extreme events, climate change impacts, natural hazards, loss and damage, measuring losses, disaster loss database
- by Doreen Stabinsky, Juan Hoffmaister
Abstract: Both the Intergovernmental Panel on Climate Change and non-governmental organizations have begun to point out that there are significant and serious limits to adaptive capacity and possible adaptation to climate change, particularly to slow-onset impacts such as sea level rise, glacial retreat, desertification, and ocean acidification. The legal obligation to act established under the UN Framework Convention on Climate Change and this growing recognition of adaptation limits has elevated the issue of loss and damage in ongoing negotiations. In this paper, we review the evolution, foundations, and rationale for the establishment of the Warsaw international mechanism for loss and damage (WIM) under the Convention, in particular, the role of the Convention in systematically addressing loss and damage in developing countries that are particularly vulnerable to the adverse effects of climate change. We also contribute some forward thinking on how to address needs of developing countries in the context of the operationalization of the mechanism.
Keywords: United Nations Framework Convention on Climate Change (UNFCCC); loss and damage; adaptation; state responsibility; slow onset; institutional arrangements; international mechanism; climate change.
Special Issue on: "ICCE-2014 "Clean Energy to Combat Global Warming,"
- Numerical modelling of effects of hydrogen supply on combustion behaviours of low calorific value coal gases
by Mustafa İLBAŞ, Serhat KARYEYEN
Abstract: In this study, the effect of the hydrogen supply on combustion performances and emission levels of low calorific value coal gases has been numerically investigated in a model combustor. The numerical modelling of turbulent diffusion flames has been performed by using a CFD Code. k-Ɛ model of turbulent flow, the PDF/Mixture Fraction model of diffusion flame and P-1 radiation model were used in the present study. The flames of coal gases for pure and hydrogen supply cases were modelled to predict its combustion behaviours. There are five cases of testing, i.e. pure generator gas or pure blast-furnace gas and fuels supplied 4%, 5%, 10% and 15% hydrogen by mass. According to the predictions, the combustion performances of generator and blast-furnace gases were improved by supplying hydrogen progressively. Similarly, NOX formations of generator and blast-furnace gases were increased due to increment of its flame temperatures depending on hydrogen amounts.
Keywords: Coal Gases, Hydrogen Supply, Combustion and Emissions
- A review on socio-economic aspects of sustainable biofuels
by A. K. Azad, M. G. Rasul, M. M. K. Khan, Subhash C. Sharma
Abstract: Biofuels are renewable eco-fuel, produced from biological resources. They are classified into 1st, 2nd and 3rd generations based on their feedstocks. The 1st generation biofuels are produced from edible oil sources which have been the main source of biofuel production. However, the biofuel production is progressively moving towards the 2nd generation biofuels which are produced mainly from the non-edible vegetable oils and animal fats. They are also called advanced biofuel since the 1st generation biofuels are unlikely to be sustainable due to facing social, economic and environmental challenges resulting from increased food price and pressure on land uses. Consequently, technologies are starting to develop for alternative feedstocks in an attempt to overcome major shortcomings of 1st generation biodiesels. The 2nd generation biofuel can be a sustainable alternative of 1st generation biofuel. However, the 2nd generation biofuels are not being produced commercially yet because they require more sophisticated processing equipment, more investment per unit fuel production and large scale facilities than the 1st generation biofuel. The study reviewed and discussed about socio-economic aspects of the sustainable biofuel in Australia because economy is seen to be a key driver for use of biofuels. Recent researches focused on sustainable biofuel production, their commercialization worldwide. The world biofuel scenario is presented in this study. Total biofuel production and consumption as well as present production facilities available in Australia are also outlined. The study briefly discussed about Australian energy economy such as energy export, import and trades etc. The study concluded that the 2nd generation biofuel can be considered as sustainable alternatives to petroleum fuel in transport sector providing great economic and environmental benefits to Australia.
Keywords: Sustainable biofuel; Socio-economic aspects; Second generation biofuel; Energy consumption; Biofuel trades; Energy challenges
- Implementation of a sustainable energy action plan for municipality of Ptolemaida
by Nikolaos Margaritis, Petros Dallas, Panagiotis Grammelis
Abstract: The first step in the implementation of a SEAP is the collaboration of a BEI, as it will provide knowledge of the nature of the entities emitting CO2 on the municipalitys territory, and will thus help select the appropriate actions. In this paper the basic methodology is presented, step by step, in order to develop a BEI for the municipality of Ptolemaida in Western Macedonia Region, Greece. According to the results, the final energy consumption of Ptolemaida city amounts to 407.994,00 MWh. Through the use of appropriate selected emission factors the carbon footprint of Ptolemaida was deducted. According to the BEI of Ptolemaida during the year 2010 were emitted 172.518 tn CO2 or 5, 37 tn CO2/capita.
Keywords: covenant of Mayors;sustainable energy action plan;baseline emission inventory; CO2 emission factors; electric energy consumption; thermal energy consumption; public and residential building sector; tertiary and agricultural sector
- CONCEPT MAPPING SUSTAINABLE ENERGY MANAGEMENT FOR A HOLISTIC APPROACH TO ENERGY STRATEGIES
by Mehmet Ziya Sogut, Murat Paşa Uysal, Yavuz Gazibey, Arif Hepbasli
Abstract: One of the important reasons for global warming and climate change is regarded as the improper management of fossil energy consumption. There may be various models or approaches to energy management (EM). However, strategic EM and its applications are still away from achieving their goals. In this regard, the main objectives of the present study are to design, develop and propose a knowledge framework primarily based on an EM concept map for a holistic EM. Aligned with the research purposes, a qualitative four-phase study was conducted, and the research question was formulated as: What would be the components and concepts required for the holistic EM? The study also integrated systematic literature review (SLR) and focus group discussion (FGD) techniques. Initially, a list of the key EM concepts was formed and a preliminary concept map was constructed. Then, the final version of the concept map was achieved through several iterative revisions and FGDs. This concept map may be seen as a complementary and contributory tool for strategy development and decision-making processes in the EM knowledge domain. It is hoped that the study may extend the previous knowledge both by the tools it has utilized and approaches it has adopted for the holistic EM
Keywords: Energy management, sustainability, concept maps, strategy, energy policy
- Arsenic pollution of soils and morbidity prevalence in Racha-Lower Svaneti district of Georgia
by Vakhtang Gvakharia, Archil Chirakadze, Zakaria Buachidze, Irine Khomeriki, Maiko Chokheli, WIlliam A. Toscano, Leila Gverdtsiteli, Maia Stamateli
Abstract: Approximately 120 thousand tons of various molecular forms of highly toxic arsenic waste are located in mountainous areas of Georgia as an inheritance after the collapse of the Soviet Union. The heavy contamination of soil around crumbling storage areas results in pollution and high exposure of local communities, livestock, poultry and wildlife to arsenic.Relative risks for13 diseases in adults: skin diseases, pigmentation maculae, cancer; epigenetic, mental and behavioural, endocrine, urogenital disorders; respiratory, neural, gastrointestinal diseases; tumours, allergy, injury and intoxications are reported. Future work involving transdisciplinary research of epigenetic abnormalities and mental disorders in adults and children including methods of psychological testing are discussed.
Keywords: arsenic, waste, disposal, contamination, soil, morbidity, health-risk, Georgia
- Gaseous fuel for lower emissions during the cold start and warming up of spark ignition engines
by Essam Abo-Serie
Abstract: Gasoline engines during cold starting (cranking) and warming-up duration, particularly, at low environmental temperatures have negative impact on air pollutions, especially for sub-zero degrees. Having to inject more fuel to achieve stable engine operation resulting in higher fuel consumptions and more engine-out emissions particularly hydrocarbons. In this study, fuel consumption, emissions and engine-start conditions have been examined using different gaseous fuels during the period from the ignition time until the catalyst reaching its lighting off temperature at no load conditions. The results showed that gaseous fuels reduces fuel consumption and emissions due to achieving substantial reduction in the number of engine cranking in addition to the inherent low emission characteristics of gaseous fuel. Hydrogen, in particular, showed superior performance in comparison to other examined gaseous fuels. The significant number of engine-start using 200 g of gaseous fuel particularly hydrogen makes the gaseous fuel viable to be used together with conventional liquid gasoline fuel.
Keywords: gaseous fuel, gasoline engine, cold start; hydrogen fuel; engine cranking; cold start emissions; low temperature SIE emissions; engine warming up emissions; cranking time
- Potential for efficiency improvement of 4-stroke marine diesel gensets by utilization of exhaust gas energy
by Dimitrios Hountalas, Georgios Mavropoulos, Christos Katsanos, Stavros Daniolos, Iosif Dolaptzis, Nikolaos Mastorakis
Abstract: In the present paper it is examined the potential application of a Rankine Cycle exhaust gas heat recovery system which recovers and utilizes energy from the exhaust gas of 4-stroke marine diesel auxiliary unit before it is released to the atmosphere, increasing thus its total efficiency. For this purpose a thermodynamic simulation model of the Rankine Bottoming Cycle is used. Heat utilization is initially considered only from the main exhaust gas stream after the T/C turbine. As reference for the investigation are used the values from the official shop tests at various loads ranging from 25% up to 100%. From these using the Rankine cycle simulation model it is investigated the potential for increase of generated cycle power output and optimization of its efficiency. In addition it is examined the effect of working media by considering steam and an organic. The results derived reveal that there exists a significant potential for fuel saving by utilization of exhaust gas energy of auxiliary engines installed on commercial vessels.
Keywords: Rankine Cycle; 4-Stroke Diesel Engine; Heat Recovery; Exhaust Gas
- MODELLING RESIDENTIAL HOUSE ELECTRICITY DEMAND PROFILE AND ANALYSIS OF PEAKSAVER PROGRAM USING ANN - CASE STUDY FOR TORONTO, CANADA
by M. Ebrahim Poulad
Abstract: A technique is proposed and developed to predict the household hourly electricity demand. The developed Artificial Neural Network (ANN) model of residential hourly demand is employed to estimate the potential impacts of Load Curtailment Activation (LCA) on electricity demand on the activation days. Results are separately discussed in two seasons: summer and winter. LCA occurs once per day for no more than four consecutive hours. Electricity demand increases dramatically after peaksaver/LCA is completed on July 6 and August 30 of 2010. Both days show saving if the data are not normalized. Unnormalized load reductions for individual event hours ranged between 0.35 and 0.64 kWh/h or 14% and 24%, respectively
Keywords: Demand management; artificial neural network; greenhouse gas emmision; peaksaving; load curtailment activation
Special Issue on: "ICCE-2014 Clean Energy to Combat Global Warming"
- Sulphur Removal from Artvin-Yusufeli Lignite with Acidic Hydrogen Peroxide Solutions
by Menderes Levent, Ömer Kaya, M.Muhtar Kocakerim, Özkan Küçük
Abstract: Abstract : In this study, the optimization of sulphure removal by H2O2 / H2SO4 solutions, and a limited kinetic measurements by H2O2/HCl solutions have been carried over Artvin/Yusufeli lignite with higher content of sulphure. In kinetic measurements which have beeen carried out so far, only the effect of temperature on removal of sulphure has been investigated. By keeping all other parameters constant, with increments in temperature at different times, it has been seen that removal of sulphure is increased in obtained data.
A statistical experimental arrangement which has six parameters and for each parameter there is twenty five experiments with five levels. In generally, at the end of experiments pyritic sulphure, total sulphure, organic sulphure and ash removal rates have been determined. According to statistical experimental arrangement, optimum sulphure removal and ash removal ratios are determined. The obtained yields in removal of pyritic sulphure is 97.85 %, in removal of total sulphure is 56.54 %, in removal of organic sulphure is 21.33 % and in removal of ash is 61.52 %.
According to carried out variance analysis, in removal of pyritic and total sulphure, all parameters are effective, but, in removal of organic sulphure, acid concentration and particle size are not effective, and in removal of ash, only, acid concentration is not effective, however, it has been seen that all other parameters are effective.
Keywords: Keywords: desulphurisation, pyritic sulphur, total sulphur, organic sulphur, lignite, hydrogen peroxide
Special Issue on: "R&R2014 "Application of Sustainable Technologies for Water and Waste Recycling and Reuse,"
- Recycling of waste glass in concrete plant as aggregate and pozzolan replacement
by Semra Çoruh
Abstract: Due to the environmental and the economic reasons, there has currently been a growing trend for the use of the industrial waste by-products as supplementary materials or as an admixture in the production of composite cement and concrete. Waste glasses cannot in general be recyled as a whole. In this study, waste glasses that are not possible to be recyled were used in concretes as a pozzolan and coarse aggregate, and thus those are provided to be used as if those were recyled. In the first group (I); waste glass (WGA) is considered as a fine aggregate in a concrete. The used WGA was reduced to 5-12 mm in size corresponding the proportions of 0-50% in the production of CEM I type cement and used goals 25 MPA and C35 MPa compressive strength. The other group (II); waste glass powder (WGP) were ground and incorporated into concrete with the levels of 5%, 15% and 30% by the weight of binder.Furthermore, two different W/C ratios 0.5 and 0.7 were used in this group repectively. Laboratory tests were carried out to evaluate these replacements. These tests were performed to investigate the workability, unit weight, compressive strength and flexural strength of concrete. The experimental results indicate for the group I; using WGA as aggregate did not have marked effect on the workability of concrete. For group II; the experimental results indicate that the mixtures which were ground with 5% waste glass as a pozzolan and 10% waste glass as fine aggregate gave compressive strength performance similar to the reference mixture. Higher percentage of waste glass (15%) replacement yielded lower strength values. This study shows that the use of waste glass materials in concretes reduces the costs of the concretes and also provides a partial solution for removing the waste glasses from the environment.
Keywords: Waste Management, waste glass powder, concrete, strength
- Solid Waste Collection Route Optimisation by Geographical Information System (GIS) in Fatih-Istanbul, Turkey
by Goksel Demir, H. Kurtulus Ozcan, Perihan Kurt Karakus, Yener Bakis
Abstract: Uncontrolled urban population growth in metropolitan areas of developing countries in recent years has made solid waste management an important issue. Generally, collection and hauling efforts cover a substantial amount of total expenditures on the solid waste management by city authorities. Success of an integrated solid waste management system is directly proportional to the success of solid waste collection and transport systems since all depends on an even and a timely manner collection process. The more populated cities bring increasing difficulties on the reach and utilize services. In order to reduce cost and time on these services, it is very crucial for authorities to search for optimization possibilities. In this manner, for local authorities, one of the most important issues on solid waste management practices is an optimized solid waste collection function. An optimized collection function has become more important in metropolitan areas having improved and sophisticated road systems. In this study, in order to minimize the route and collection cost by employing GIS and using numerical road data, a solid waste collection route optimization study was carried in Fatih district of Istanbul, Turkey.
Keywords: municipal solid waste; collection; route optimisation; Geographical Information System (GIS); Fatih district; Istanbul
Special Issue on: "GCGW-14 "Global Warming and its Energy Solutions,"
- COMPARATIVE EXERGO-ENVIRONMENTAL ASSESSMENTS OF SOLAR BASED HYDROGEN PRODUCTION SYSTEMS
by Tahir Abdul Hussain Ratlamwala
Abstract: The present study focuses on a comparative exergo-environmental analysis of two solar based integrated systems for hydrogen production. Two integrated systems namely (a) solar heliostat field system integrated with Cu-Cl cycle and Kalina cycle (as system 1) and (b) solar heliostat field system integrated with Cu-Cl cycle, Kalina cycle and photocatalytic reactor (as system 2) are considered. A parametric study is carried out to investigate the effects of varying the operating parameters such as solar light intensity and ambient air temperature on the exergo-environmental performance of these integrated systems. The results show that the environmental impact factors of systems 1 and 2 vary from 0.54 to 0.52 and 0.45 to 0.44, respectively with increase in solar light intensity. The environmental impact index of systems 1 and 2 are noticed to be varying from 1.2 to 1.1 and 0.8 to 0.78, respectively with rise in ambient temperature. The results obtained show that system 2 performs better than system 1 from exergo-environmental perspective due to better utilization of solar light intensity.
Keywords: Exergo-environment; heliostat field system; Cu-Cl cycle; photocatalytic; hydrogen
- A power generation system based on ferriferous oxide magnetic fluid
by Li Mingjun, Luo Feng, Xu Shuangyan, Zhang Huan
Abstract: Global warming refers to the climate system warming by the Greenhouse effect, and the new energy will create positive change by using less coal and oil. In this paper, a new micro-distributed energy supply system which is redesigned based on the published designs. It presents experimental findings using this device and theoretical analysis for its performance. The paper discusses the relationships between the electromagnetic force, velocity and temperature. The measured data are in good agreement with the theoretical predictions. The experiments show that a higher electric output can be achieved by increasing the flow velocity and magnetic strength.
Keywords: power generation system, ferriferous oxide magnetic fluid, MHD set-up, electromotive force
- A Numerical Investigation on How to Efficiently Utilize Carbon Dioxide in Convection-based Energy Systems
by Yuhui Cao, Xin-Rong Zhang
Abstract: Owing to the environmentally benign nature and the special property variation at supercritical pressure, greenhouse gas carbon dioxide is regarded as the best retrofit to meet the future demand on long-term environmental-friendly working fluids. However, how to efficiently utilize carbon dioxide to reduce energy consumption and mitigate global warming is still an unsolved problem. In this paper, the natural convection heat transfer of carbon dioxide under supercritical pressure condition in a small cavity is studied for the first time. The potential of carbon dioxide as working fluid is quantitatively estimated in terms of enhancing heat transfer and reducing the cost of heat exchangers. It is found that the operating conditions including the temperature, temperature difference and pressure all have significant effects on heat transfer rate due to the special property variations of the CO2 fluid. Furthermore, a heat transfer correlation is proposed for the first time to quantitatively describe the natural convection heat transfer of CO2 at supercritical pressure in a small cavity.
Keywords: carbon dioxide; natural convection; heat transfer
- Methane production from napier grass by two-stage anaerobic digestion
by Nusara Sinbuathong, Yuwadee Sangsil, Suchat Leungprasert, Suriya Sawanon
Abstract: Digestion of napier grass was investigated in two-stage anaerobic reactors. The reactor volume was 4 and 5 litres for the acidogenic and methanogenic reactors, respectively. The acidogenic reactors were fed once daily at 100, 150, 200, 250, and 300 ml/day with a slurry of napier grass. The organic loading rates (OLRs) were 0.60, 0.90, 1.20, 1.50 and 1.80 kg Chemical Oxygen Demand (COD)/m3.day. Mixed ruminal microorganisms from cows were used as the inoculum. The pH was adjusted to 7.5 for all methanogenic reactors at the start-up period. The reactors were operated at 30
Keywords: anaerobic digestion;bioenergy;biogas;global warming;methane;napier grass
- Assessing the potential impact of future precipitation trends on urban drainage systems under multiple climate change scenarios
by Hua Bai, Xin Dong, Siyu Zeng, Jining Chen
Abstract: Investigations of climate change impacts on urban drainage system have been discerned worldwide in the past decades and will attract more attention in the coming future. This paper presents an approach to assessing the possibility of extreme rainfall events under variation greenhouse gas emission scenarios as well as a case study in Hefei city, China. Future precipitation projections were downscaled in a spatiotemporal way firstly, and summarized into Intensity-Duration-Frequency (IDF) curves. The changes of the IDF were then compared subsequently between the present condition and the future scenarios. The results indicate that, the local rainfall regime will generally stay the same or slightly increase for the drizzles, but the extreme events will become more intensive and frequent. Although uncertainty has been found among the different emission scenarios and the various future periods, it is still notable to take climate change into consideration to deal urban drainage system issues.
Keywords: Climate change; urban drainage systems; statistical precipitation downscaling; multiple scenarios
Special Issue on: "ICCE-2014 Clean Energy to Combat Global Warming,"
- Using Emission Index To Determine Energy Efficiency And Environmental Parameters Of A
Turbofan Engine At Various Flight Phases
by Yasin Sohret, T. Hikmet Karakoc, Onder Turan
Abstract: In this study, an unordinary methodology for energy efficiency calculation of a turbofan engine is introduced. Emission indexes of the engine are used to find out energy efficiency and novel parameters for environmental impact assessment. Energy efficiency are proven at take-off, climb-out and approach phases of the flight for the turbofan engine. Additionally, power and energy emission index variations of the turbofan engine for carbon monoxide and unburned hydro carbon constituents of the exhaust are presented in the paper. As a result of the study, energy efficiency of the turbofan engine is determined 35.68%, 41.12% and 36.05 at take-off, climb-out and approach flight phases respectively.
Keywords: Turbofan, emission, aircraft, energy, environmental impact
Special Issue on: "Loss and Damage from Climate Change,"
- Loss and Damage due to climate change:
Attribution and Causation Where Climate Science and Law meet
by Roda Verheyen
Abstract: The short paper scrutinises the concept of legal causation in the context of detection and attribution and discusses the approaches of law and climate science to causation. It looks at the issue both with respect to the climate regimes agenda item of loss and damage and with respect to a specific tort-like or nuisance-based case.
Keywords: Causation, Detection and Attribution, Science, Law, FCCC, Tort