International Journal of Global Warming (82 papers in press)
Carbon dioxide capture by facilitated transport membranes: A review
by A. uma maheswari, K. palanivelu
Abstract: In recent years, the increase in industrial carbon dioxide emissions has put forward serious threats in atmospheric conditions. In order to address this problem various conventional techniques are available, but they have several limitations in terms of cost and energy. Carbon dioxide capture in a post combustion scenario needs cost effective and energy efficient alternatives to the conventional technologies. In this sense, membranes attract a great deal of attention for the bulk removal of CO2 as they offer a viable option to the established conventional techniques. In this review, the effective separation of CO2 by facilitated transport membranes (FTMs) and their recent developments in concurrence with past research findings have been reviewed and discussed. The FTMs are grouped into different categories based on the type of the carrier. Also, the various methods of improving stability, permeability, and selectivity of FTMs are discussed scrupulously. A special emphasis is put on reviewing the process challenges and the viability of the techniques in capturing industrial CO2 emissions. Current drawbacks in the existing research and future direction for performance development are also discussed broadly.
Keywords: Keywords: carbon dioxide capture; facilitated transport membranes; mobile carrier; fixed site carrier; polymeric blend; cross linking agent
Spatially Explicit Estimates and Temporal Changes of Forest Tree Biomass in a Typical Department of Forest Management, Turkey
by Sedat KELEŞ, İdris Durusoy
Abstract: This study presents temporal changes in forest timber biomass of a department of forest management consisting of four forest management units in Turkey. Changes in forest tree biomass are linked to forest cover change during 1986-2011 period based on forest inventory data. We also produced forest biomass density maps using Geographical Information Systems. The results showed a net increase of 1755 ha in forested areas of the Department of G
Keywords: Forest timber biomass, Biomass expansion factor, Climate change, Forest management plan, Geographical information systems
Analysis of the Air Temperature records of Djelfa
by Boubakeur Guesmi, Mohamed Sahnoune, Chakali Gahdab
Abstract: The delay of defoliation, the advance of blooming, in January, of some recently planted palm trees, the appearance of the housefly in winter, and the disappearance of the featuring cold and frost of Djelfa both prompted the need of a scientific explanation, based on The analyses of mean, minimum and maximum air temperatures records for a period of forty years by the methods (coefficient of variation (CV), trend test, correlation and homogeneity test),which have shown that, although, the fluctuations of the mean temperature, especially in winter (CV=27%), a global warming of 1
Keywords: Semi Arid, Djelfa , Global warming, climate change, Air temperature, Mann Kendall test, Algeria, steppe , frost, cold, homogeneity test, correlation, coefficient of variation
Bin weather data for different climates of Turkey
by Saban Pusat, İsmail Ekmekçi
Abstract: In this study, bin weather data and bin method for Turkey which is a well-known and simple method to estimate heating and cooling loads were investigated. The bin weather data for dry-bulb temperature from -50
Keywords: Bin data; Typical meteorological year; Energy analysis; Heating load; Cooling load; Turkey; Climate.
An Estimation of Offset Supply for the Korean Emissions Trading Scheme Using the Bass Diffusion Model
by Intaek Yoon, Sohyun Kate Yoon
Abstract: The purpose of this paper is to estimate the possible carbon offset supply in the Korean Emissions Trading Scheme using the Bass Diffusion Model. To estimate the quantity of the likely offset supply, both a bottom-up and top-down approach were used. The forecasted supply of offsets from 2015 to 2020, for non-covered companies in the industrial sectors, is approximately 12.60 million tCO2e. For a realistic estimation, scenario based analysis on the marginal abatement costs for each project type and sector has been conducted. Five offset project scenarios (6,000; 12,000; 20,000; 33.000; and 100,000 Korean Won/tCO2e) have been selected. It is estimated that there will be 2.44~3.43 million tCO2e of offsets available until 2020. This analysis forecasts a significant shortage of domestic offsets in ETS periods if no additional offset programs or methodologies are allowed.
Keywords: Carbon Offset, Korean Emissions Trading Scheme (ETS), Bass Diffusion Model, Marginal Abatement Cost, Offset supply
ANFIS Based Comparative Exhaust Gases Emissions Prediction Model of a Military Aircraft Engine
by Isil Yazar, Yasin Şöhret, T. Hikmet Karakoc
Abstract: In this paper, comparison of estimation methods for exhaust gaseous emissions developed for a military aircraft engine via adaptive neuro-fuzzy inference system (ANFIS) structure is introduced. For system identification process, combustion efficiency, engine work load and air-fuel ratio are preferred to be system inputs to obtain emission indexes of carbon monoxide, carbon dioxide, nitrogen oxides and unburned hydrocarbon as system outputs. While comparing the estimation methodologies, two clustering methods in adaptive neuro-fuzzy inference system structure, grid partitioning and subtractive clustering, are benefited to define membership functions. Hybrid optimization is preferred in training parts. As a conclusion remark of the present study, estimation error values of both clustering methods are found for different number of membership functions with the common training method. Nonetheless, training time saving is the advantage of subtractive clustering method in our study.
Keywords: Aircraft emission, ANFIS, military aircraft, modelling, neuro-fuzzy, prediction, turboprop.
Variability in stream flows of the Xiang River in a changing climate
by Guoqing Wang, Cuishan Liu
Abstract: Stream flow plays a crucial role in the environment, society and the economy. Variability and trends of recorded discharges of the Xiang River and the responses to climate changes were investigated. Results indicate rising trends in the annual and four seasonal temperatures over the Xiang River catchment and sub-catchments for 1960-2010, as well as variations in precipitation. Spring and autumn precipitation showed a slight decreasing trend, while annual precipitation presented increasing trend mainly due to greater increases in summer and winter precipitation. As a result of changes in climate, annual discharges recorded at three hydrometric stations Laobutou on the Xiangs upper reaches, Hengshan on its mid-section, and Xiangtan on its lower part, exhibit insignificant increasing trends for 1960-2010, with linear upward rates of 7.0, 45.7, and 47.5m3s-1/10a respectively. Variations of annual discharge series for 1960-2010 exist in three different phases from wet to dry to wet with a time span of approximately 16 years (i.e. 1960-1975, 1976-1992, and 1993-2010). During the dry phase (1976-1992), mean discharges at the three hydrometric stations were -5.52% (Laobutou), -6.73% (Hengshan), and -5.65% (Xiangtan) less than multiple-year average for 1960-2010. Variation trends of the seasonal discharges are generally in accordance with that of seasonal precipitation, with the exception of autumn discharges at the Xiangtan and Hengshan stations due to the influences of antecedent precipitation. Annual and seasonal discharges are highly correlated to catchment precipitation and weakly correlated to temperature. Changes in precipitation highly influence variability of stream flows of the Xiang River. A 1% change in precipitation will roughly lead to 2.08-2.27%, 2.02-3.37% and 1.9-2.05% changes in discharges at the Laobutou, Hengshan, and Xiangtan stations respectively. It is essential to consider potential impacts of climate change in future water resources management.
Keywords: variation; climate change; stream flow; Xiang River
GLOBAL WARMING QUANTIFICATION BY INNOVATIVE TREND TEMPLATE METHOD
by Z. Sen
Abstract: As for the trend identification, the literature is full of quantitative studies, but with respect to two-probability distribution function (PDF) description remains at qualitative level. The main purpose of this paper is to convert the two-PDF description into quantitative form for objective and quantitative assessments. Such a goal is achieved on the basis of innovative trend templates, which indicate the arithmetic averages and the standard deviations of the two equal length halves of the given temperature record. Two-PDF explanations are represented by three combinations as changes in the arithmetic averages, standard deviations and in both parameters through their logical connections with the innovative template description. The application of the methodology is given for four mean annual temperature records from Istanbul City, Turkey. Global warming variations are described quantitatively as increases or decreases in the statistical parameters. The proposed methodology can be applied for any temperature record in the world.
Keywords: Global warming, trend, probability, innovative, template, quantification, climate change
Aerosol direct shortwave radiative forcing effect based on SBDART model in the Pearl River Delta, Guangdong (China)
by Lili Li, Yunpeng Wang
Abstract: Aerosols play an important role in the energy budget of the Earth-atmosphere system. In this paper, we studied aerosol shortwave direct radiative forcing (DRF) effects in Pearl River Delta based on SBDART and a two-layer-single-wavelength model. Simulation results indicated that the underlying surface type and solar zenith angle have significant impacts on aerosol radiative forcing. The comparison between aerosol radiative forcing effects on urban asphalt surface and vegetation shows cooling and warming effects of aerosol shortwave radiative forcing on urban asphalt are much more apparent than that on vegetation, implying aerosols over asphalt-predominated cities will impact the local climate. Then we estimated variations of average DRF and net radiation flux with solar zenith angle in the Pearl River Delta. DRF indicates warming at solar zenith angles of 0
Keywords: Aerosols; Shortwave direct radiative forcing; SBDART; Net flux; Underlying surface; Solar zenith angle;.
Changes in precipitation from 1958 to 2012 in arid and semiarid regions of northern China
by Jinchang Li, Yanfang Zhao, Xiaohui Fan
Abstract: We used a precipitation dataset from 1958 to 2012, collected at 58 meteorological stations across arid and semiarid regions of northern China, to look for monotonic trends and steps (abrupt changes) in the trends for annual and seasonal precipitation. We found that annual precipitation during the study period had decreased by 40.8 mm in semiarid regions, mainly caused by decreasing precipitation during the rainy season, versus increases of 34.4 mm in eastern arid regions and 36.4 mm in western arid regions, mainly caused by increasing precipitation in the pre-rainy season and winter. In arid regions, the magnitude of the precipitation increase increased moving from east to west, and the lower the annual precipitation, the larger the percentage increase. If the precipitation trends during the study period continue into the future, the west to east gradient in dryness may decrease in the study regions. An abrupt increase in the pre-rainy season precipitation occurred in the semiarid, eastern arid, and western arid regions in the early to mid-1980s, which was consistent with the period when rehabilitation of aeolian desertified land began in these regions. Therefore, although human activities undoubtedly had some impacts on aeolian desertification in arid and semiarid regions of northern China, the change in pre-rainy season precipitation may have been the key factor responsible for changes in aeolian desertification in the region through its effects on soil moisture, vegetation cover, and wind erosion of the soil.
Keywords: precipitation; trend analysis; climate change; aeolian desertification; arid and semiarid regions.
Impact of climate change scenarios on hydrologic response of Upper Wardha catchment, Central India
by Rajashree Bothale
Abstract: Aim of present study is to investigate the impact of climate change scenarios on response of hydrologic unit based on global climate model. Impact of climate change is studied in Upper Wardha catchment, India by using Statistical Downscaling Tool (SDSM) and the HadCM3 (Hadley centre Climate Model 3) Global Circulation Model (GCM) A2 and B2 scenario data. Changes in extreme climate which affects the society and the environment is studied by 7 indices which show statistically significant increase in frequency of warm days, warm nights and hot days and decrease in cold days and cold nights. Continuous dry days and simple precipitation intensity index show negligible change in the future scenarios. Future scenarios (2011-2099) developed for downscaled meteorological variables, viz., minimum temperature (TMIN), maximum (TMAX) temperature and precipitation (PPT) show an increasing trend for TMIN, TMAX and summer season precipitation after calibration (1969-1985) and validation(1986-2001). An average rise of 2.430C and 1.880C in TMAX and 1.980C and 1.450C in TMIN is observed by 2080s under A2 and B2 scenario. Present scenario of the study lies between A2 and B2 scenario with trend from observed past data being observed as 0.70C. With general warming over the area, potential evapo-transpiration showed increase in loss by 5.9% and 6.24% in 2080s under A2 and B2 scenarios. The overall precipitation shows a decrease with respect to base but 54% and 46% rise in summer rain in A2 and B2 scenario by 2080s. The downscaled variables were used in Hydrologic Engineering Centers Hydrologic Modeling System (HEC-HMS). After calibrating (1988-2005) the model for daily flows (R2=0.72) and monthly flows (R2=0.81) and validating (2006-2012) for daily flows (R2=0.82) and monthly flows (R2=0.96), future flow scenarios were generated. The average annual streamflow showed a decrease of -7.6%, -6.7%, -9.29% respectively in 2020s, 2050s and 2080s under A2 scenario and an increase of 8.06%, 10.34% and 7.81% respectively in the 2020s, 2050s and 2080s under B2 scenario.
Keywords: Climate change; Statistical downscaling; Extreme indices; SDSM; HEC-HMS; Central India; Upper Wardha
CFD analysis of CO2 adsorption in different adsorbents including activated carbon, zeolite and Mg-MOF-74
by Medhat Nemitallah
Abstract: The present study focuses on modelling of an adsorption system for CO2 in different adsorbents including activated carbon, zeolite and metal organic frameworks (MOFs) as one of the most promising methods for post-combustion carbon capture. The adsorption model is based on a modified Dubinin-Astakov (D-A) adsorption equation. The D-A adsorption equation parameters like enthalpic factor, entropic factor, limiting pressure, limiting adsorption are found by regression analysis using CO2 adsorption isotherm for different adsorbents. Simulations are performed using Fluent CFD commercial software. At tank entrance, mass flux profile of CO2 is established using UDF written in visual C++. Heat and mass transfer features of the numerical model are validated by the experimental data of hydrogen adsorption on activated carbon. The adsorption characteristics of CO2 in activated carbon are studied in details under fixed pressure of 2 bar. This is followed by comparisons between different adsorbents including activated carbon, zeolite and MOFs. The effects of storage pressure on adsorption are studied for different adsorbents for a range of pressure from 20 kPa to 100 kPa. For all adsorbents, the results showed high adsorption at the entrance and near wall regions. However, low adsorption and high temperature are obtained at the central region of the storage bed. The adsorption capacity of all adsorbents has been increased by increasing the storage pressure. Under the same pressure, Mg-MOF-74 adsorption material is found to have the highest adsorption capacity as compared to zeolite and activated carbon.
Keywords: Post-combustion carbon capture; CO2 Adsorption; Activated carbon; Zeolite; Metal organic frameworks (MOFs).
Determination of Efficient Execution of Dry-Ice Blasting for Shipyard Applications
by Veysel Alankaya
Abstract: Blasting process in shipyards can be marked as one of the most significant source of waste. Blasting is mandatory for the surface preparation before painting process in new shipbuilding or the removal of the old paint from the surface of used vessels. In this study, dry-ice blasting for surface preparation is investigated by means of impact effectiveness of the abrasive material replacing the traditional methods with less contaminating, environmental safe and less human health effecting alternative process. An experiment is performed to observe the efficiency and commercial usage of dry-ice blasting method. Additionally, numerical analyses which are derived by a commercial dynamic explicit finite element program, are presented denoting the blasting efficiency and damage behavior by particle velocity according to paint thickness. A new point of view on choosing dry-ice blasting velocity, decreasing amount of waste, time and the pollution for a green world is investigated. The effective use of dry-ice pallets which are the most environmentally friendly blasting material, is investigated to perform a commercially suitable method. A chart is presented for dry-ice blasting, performing the effective velocity through paint thickness and cleaning area.
Keywords: Blasting process, dry-ice blasting, waste materials, paint removal, impact damage.
Modeling of lead removal from battery industrial wastewater treatment sludge leachate on cement kiln dust by using Elmans RNN
by Semra Coruh
Abstract: In this study, an Elman type recurrent neural network (RNN) was employed to develop a prediction model for lead removal from industrial sludge leachate using cement kiln dust. The leaching characteristics of industrial sludge were observed through the Toxicity Characteristics Leaching Procedure (TCLP). Dosage, contact time, and temperature were considered as independent experimental factors. A comparison between the model results and experimental data showed that Elmans RNN model is able to predict lead removal from industrial sludge leachate. The outcomes of suggested Elmans RNN modeling were then compared to batch experimental studies. The results show that industrial sludge leachate using cement kiln dust is an efficient sorbent, and Elmans RNN is dynamic in nature and is able to model the batch experimental system.
Keywords: Lead, cement kiln dust, leaching, adsorption, Elman’s RNN
Understanding Climate Change Risk Perception in the United States
by Himanshu Grover, Samuel Brody, Arnold Vedlitz
Abstract: Public perception of risk from climate change is an important determinant of willingness and cooperation of the citizens in supporting climate change mitigation and adaptation policies. Although there is a growing body of research focusing on a variety of individual, cultural, and organizational factors that affect an individuals perception of risk, only a few studies have adopted an interdisciplinary analytical approach to understand public perception of climate change risks. This study extends earlier interdisciplinary research initiatives and proposes an integrated model for understanding climate change risk perception. Using measures of objective risk, individual climate stress, and individual capacity, we explain the public perception of climate change risks based on a national representative survey of American citizens. Geographic Information Systems and spatial analytical techniques are used to supplement the survey data with measures of objective risk associated with the location of each respondent. Analysis of the data using multivariate regression suggests that increased objective risk and individual capacity result in significantly higher perception of risk from climate change, whereas higher individual climate stress results in lower risk perceptions.
Keywords: climate change, risk perception, objective risk, individual climate stress, individual capacity
A comparison of thermal decomposition of vineyard pruning waste in the flow of air and nitrogen
by Peter Rantuch, Juraj Ondruska, Igor Wachter
Abstract: The article deals with a thermal decomposition of vineyard pruning waste. The samples were tested by means of thermogravimetry and differential scanning calorimetry in the flow of air and nitrogen. Thermal gravimetric analyses were performed up to a temperature of 650
Keywords: thermal oxidation, pyrolysis, thermogravimetry, activation energy, vineyard waste
Analysis of time series variations of temperature and its forecast in the northeastern Bangladesh
by Ahmad Hasan Nury, Khairul Hasan, Jahir Bin Alam, Mahedi Hasan
Abstract: Variation of temperature due to climate change has an intense effect of meteorological and other environmental areas. Therefore, time series analysis of temperature data can be a valuable tool to investigate variability pattern as well as to predict short and long-term changes in the temperature time series. Summing up this entire problem, here in this study linear trend analysis has been conducted to sort out the basic idea of the pattern of temperature variation and SARIMA (Seasonal Autoregressive Integrated Moving Average) model has been employed to make a forecast of the upcoming five years on a monthly basis. The linear trend showed a rise in the maximum (2.97℃ and 0.59℃ per hundred years) & minimum temperature (2.17℃ and 2.73℃ per hundred years) at Sylhet and Sreemanal station respectively. Anomaly of these regions also showed increasing temperature. SARIMA model was fitted for temperature time series with its traditional three steps, identification, diagnosis and forecasting respectively. For monthly maximum and minimum temperature at Sylhet and Sreemangal stations, respective models were (3, 1, 3) (1, 1, 1)12, (2, 1, 3) (0, 1, 1)12, (3, 1, 1) (1, 1, 1)12 and (2, 1, 1) (1, 1, 1)12. This will help the policy makers to understand the nature and scale of possible temperature changes in Northeastern Bangladesh.
Keywords: SARIMA; linear trend; anomaly; temperature; time series; maximum temperature; minimum temperature; variability pattern; predict short and long-term change
Combustion performance and emissions of diesel/biodiesel blended fuels in a residential reverse flame boiler
by Bilal Sungur, Bahattin Topaloglu, Lutfu Namli, Hakan Ozcan, Mustafa Ozbey
Abstract: This paper presents an experimental study on the performance of diesel and biodiesel blended fuels in a water-cooled flame tube boiler. The combustion performance and gas emissions of B10, B20 and B30 were studied and these were compared with the diesel fuel. To investigate the combustion characteristics of biodiesel blends, including pure diesel, the temperature distributions in the combustion chamber and smoke tube, exhaust temperature, and exhaust gas emissions were determined. The results showed that the size of the peak temperature zones in the combustion chamber decreased gradually from B0 to B30. As a consequence of reduced temperatures in combustion chamber, NOx emissions decreased from 53 to 47 ppm and CO emissions increased slightly from 9.6 to 12.8 ppm. Also, CO2 emissions decreased from 13.2 to 12.8 with increasing biodiesel ratio in the diesel fuel. Results also showed that the thermal efficiencies of diesel/biodiesel blended fuels remained almost the same.
Keywords: biodiesel blends; boiler; emissions; temperature distribution in combustion chamber; renewable fuels
The active-layer ice temperature (ALIT) increases more obvious on a cold glacier than a temperate glacier during the past 30 years
by Wang Shijin, Ding Baohong
Abstract: On the basis of the historical documents and measured active-layer ice temperatures (ALIT) on Baishui Glacier No. 1 (BG1), Yulong Snow Mountains, Southeastern Tibetan Plateau and Urumqi Glacier No. 1 (UG1), the eastern Tien Shan Mountains, Central Asia, this paper revealed and compared their inter-decadal response of the ALIT in the past 30 years. The results showed that the daily mean ALIT increased by 0.24
Keywords: the active-layer ice temperature; inter-decadal variation; comparative study
Climate Variability, the Proliferation and Expansion of Major Livestock Diseases in East Gojjam, Northwestern Ethiopia
by Desalegn Y Ayal, Muluneh Woldetsadikb Abshare, Tesfu Kassa, Getachew Tilahun, Nigatu Kebede , Walter Leal Filho
Abstract: The livestock sector in developing countries is subject to climate and non-climate stressors. Previous studies did not address the effect of climate variability and extremes on the livestock diseases and livestock system in the highlands of Ethiopia. This study explores the link between climate variability and its effect on livestock production and system. Mixed research method was used to explore and explain the problem. Data were collected from both primary and secondary sources. The results of the study show that farmers have perceived an increase in temperature and the erratic behavior of rainfall in its onset, cessation and intensity over time. The study also reveals that tick and tick borne diseases, trypanosomiasis and epidemics of infectious diseases such as anthrax and black leg occurred frequently. Farmers in the area practiced mixed rainfed livestock farming system. Deterioration of pasture, diseases and shortage of water and land are among the major constraints for livestock development. Livestock are kept for drafting, manure, milk, meat, packing, means of income and transportation. Oxen, calves, small ruminants and donkeys are kept in the same house with the farmers. Multifunctionality of the sector is complemented with other livelihoods and used to diversify their economic interest and open access to informal loan. Thus, the sector acts as insurance against shocks.
Keywords: climate variability, disease, awareness, livelihood, livestock
RESIDUAL LIPIDS INCORPORATION IN A PETROLEUM REFINERY
by Stella Bezergianni, Athanasios Dimitriadis, Loukia Chrysikou
Abstract: The aim of this study was to evaluate the technical feasibility and environmental benefits from integrating waste cooking oil (WCO) in a refinery, towards producing a new hybrid diesel. This new hybrid diesel, partially of fossil- and partially of bio-based origin, was evaluated as an alternative to market diesel according EN 590 specifications, showing comparable if not superior quality in the case of the former. Another scope was to compare the environmental impacts of the new hybrid diesel and the market diesel, in order to identify the most environmentally friendly fuel with the higher sustainability potential. The comparison was based on a Well-To-Tank analysis (WTT) including only the production processes of both fuels considered. Based on this study, the new hybrid diesel produced via co-hydroprocessing petroleum fractions with WCO presented the lower carbon foot-print, validating its sustainability superiority. It is evident that integrating residual biomass in a refinery is the most sustainable approach for incorporating biomass in the transportation sector.
Keywords: co-hydroprocessing; hybrid diesel; biofuel; LCA; HVO; WCO
Coupled Geomechanical and Reactive Geochemical Model for Fluid, Heat Flow and Convective Mixing: Application for CO2 Geological Sequestration into Saline Aquifer with Heterogeneity
by Ronglei Zhang
Abstract: The significance of thermal-hydrological-mechanical-chemical (THMC) processes is well-identified in the operation of CO2 geo-sequestration. Geomechanical and geochemical effects may significantly affect aqueous phase composition, porosity and permeability of the formation, which in turn influence fluid advection, convection and transport. A sequentially coupled mathematical algorithm is employed to simulate reactive transport of water, CO2 gas and species in subsurface formation with geomechanics, which is bale to model the THMC processes of the fluid advection and convection, heat and solute transport in aqueous and gaseous phase, mean stress, and geochemical reactions under both equilibrium and kinetic conditions. A 2D model with complex chemical compositions is presented to analyse the THMC processes quantitatively, including geomechamical effect due to CO2 injection, dispersion and convective mixing due to CO2 dissolution, mineral alteration due to chemical reaction of water, CO2 and rock minerals, coupled effects of geochemical reaction and geomechanics.
Keywords: THMC Processes; Convective Mixing; CO2 Geo-sequestration;Chemical Reaction; reactive Transport
Decreasing energy consumption and carbon footprint in a school building: A comparative study on energy audits
by Mustafa Zeki Yilmazoglu
Abstract: Energy audit of a school building was carried out to evaluate the effects of the building retrofitting on energy efficiency and carbon footprint. Lighting intensities of the selected areas in the building were measured and thermal images of the building envelope were compared before and after retrofitting. Combustion performance of the boilers was measured and the effects of the insulation on the natural gas consumption were investigated. According to the results, the lighting system renovation decreased the share of lighting in total electricity consumption of the buildings by 53.2% for the recommended lighting intensities in the selected zones. As a result of the lighting system renovation, carbon footprint of the campus decreased 308715 kgCO2 per year. Natural gas consumption decreased by 25.3% after building envelope insulation which equals to 137078 kgCO2 per year.
Keywords: energy audit; carbon footprint; energy efficiency; lighting; thermal image; building retrofitting; greenhouse gases
Regional Climate Model simulation for temperature and precipitation over South Asia using different physical parameterization schemes
by Mujtaba Hassan, Du Pengfei
Abstract: The ability of ICTP Regional Climate Model version 4 (RegCM4.3) is investigated by using two land surface schemes: the Biosphere-Atmosphere Transfer scheme (BATS) and the Community Land Model version 3.5 (CLM3.5). To attain the best model configuration over the South Asia region, six sensitivity experiments are conducted with three different cumulus convection schemes. RegCM4.3 coupled with CLM3.5 and mixed convection scheme option (MIX-CLM), produced better simulation than BATS. The cold winter bias and the intensities of wet-dry biases over the foothills of HindukushKarakorum-Himalaya (HKH) and Central India are substantially reduced with MIX-CLM. In terms of seasonal variability, results suggest that different convection schemes behaved differently over sub-regions of the domain. The annual cycles of precipitation and temperature are better captured over the Bay of Bengal and Western Ghats by MIX-CLM. In spite of some deficiencies, the MIX-CLM scheme improves the model performance over the various parts of the domain.
Keywords: Regional climate modeling, Seasonal variability, Physical parameterization, South Asia, Model evaluation
AN EVALUATION OF NEAT BIODIESEL/DIESEL PERFORMANCE, EMISSION PATTERN OF NOX AND CO IN COMPRESSION IGNITION ENGINE.
by Emmanuel Onuh, Freddie Inambao
Abstract: Oxides of Nitrogen (NOx) and Carbon (II) oxide (CO) emissions from engine running on pure biodiesel constitute one of the environmental challenges to its application as fuel. Verifying their sources and production pattern is an essential first step to tackling the challenge. 100% biodiesel derived from Moringa, Jatropha and Waste oil along with petroleum diesel were evaluated in a single cylinder diesel engine. It was observed that oxygen concentration and combustion temperature are the primary drivers of a kinetically determined process. NOx emission trended with Zeldovich mechanism prediction and thus increases with increasing O2 concentration and temperature. CO2 dissociation at elevated combustion temperature in a suppressed O2 concentration regime governs CO production for normal diesel running at high load but, low temperature and high viscosity account for same effect in biodiesel runs. CO therefore increases with increasing temperature and decreasing O2 concentrations for petroleum diesel but for biodiesel, the reverse is the case. Novel EGR (Exhaust gas recirculation) and LTC (Low temperature combustion) engine therefore holds the key to unlocking biodiesel potential and remediating some of the difficulties observed with petroleum diesel.
Keywords: Pure biodiesel, Zeldovich mechanism, Dissociation, EGR(Exhaust Gas Recirculation), LTC (Low Temperature Combustion.
A novel alternative fuel for diesel engine: a Comparative experimental investigation
by Senthil Ramalingam, Ramalingam Ganesan, Silambarasan Rajendran, Pranesh Ganesan
Abstract: In this present study performance, combustion and emission characteristics of Jamun Methyl Ester in a direct injection diesel engine was experimentally investigated. Fuels were tested in a Single cylinder, Direct Injection (DI), water cooled diesel engine. The effects of JAME-diesel blends on engine performance, emission and combustion characteristics are evaluated by operating the engine at different loads.. It is found that JAME20 (20% JAME + 80% diesel) blend showed better performance and reduced emission. However a very marginal increase in NOx emission when compared to diesel was observed when using biodiesel-diesel blends. The ignition delay, maximum heat release rate and combustion duration were poor for biodiesel-diesel blends compared to diesel. The experiment shows that JAME20 can be used as an alternate fuel for direct injection diesel engine without any modifications. Thus jamun methyl ester can indeed become the new appropriate source for biodiesel, with environmental benefits.
Keywords: Jamun methyl ester; performance; emission; combustion; transesterification;diesel engine;
Green Sports Supporting a Low-Carbon Society: Inspiration from Japan
by Xiaochen Chen, Jia Niu, Ken'ichi Nakagami, Qian Zhang, Xuepeng Qian, Jun Nakajima
Abstract: Global warming, mainly due to anthropogenic greenhouse gas emissions, has a devastating effect on our living planet. To combat it and foster a low-carbon society, contributions from the sports community are needed. Accordingly, the concept of green sports has emerged, calling for green performance of sports infrastructure, green production in sports manufacturing, and green awareness of sports community. In this respect, Japan, as a leader in both Asian sports and worldwide sustainable development, has valuable experiences, including widespread stakeholders participation, substantial efforts, and outstanding achievements. Inspired by Japans examples, this study not only summarizes mainstream recommendations for the development of green sports, but also presents two innovative proposalslinking green sports with market-based flexibility mechanisms and promoting environmental education through sports celebritiesand the prospects for these approaches. This article could be used by worldwide sports community as reference for making contributions to the establishment of a low-carbon society.
Keywords: Green Sports; Low-Carbon Society; Green Performance; Green Production; Green Awareness; Flexibility Mechanism; Environmental Education; Japan
A review on characteristics, advantages and limitations of palm oil biofuel
by Md Iqbal Mahmud, Haeng Muk Cho
Abstract: Consumption and use of natural resources is a high concerning issue in modern days. Increasing in fuel price, limited resources of fossil oil and great concerns on environmental matters has led the researchers and scientists to concerted and escalating research and development efforts in search of renewable and environmental friendly alternative energy sources. In this connection, recent strong demand for renewable fuels has resulted in increased production of biofuels worldwide for solving transportation fuel problems. Currently, biofuels from palm oil is establishing as a great source of alternative fuel. Palm oil can be used to produce biodiesel, which is also known as palm oil methyl ester. Palm oil biodiesel is often blended with other fuels to create palm oil biodiesel blends. This paper highlights on biofuel/biodiesel production from palm oil, use, advantages and limitations.
Keywords: Palm oil, Biofuel, Biodiesel, Emission, Transesterification.
Nonlinear Dynamics Of Monthly Temperature Data Set In The Northwestern (Marmara Region) Turkey
by Haci Ahmet Yildirim, Hamza Altinsoy
Abstract: Studies observing climatic and atmospheric events have had great importance, especially in the 21 th century. The destructive impacts of unprecedented natural events on human life inherently triggered researchers to be concentrated on this significant area. The extreme climatic events, natural hazards, unexpected and continuing alterations of climatic parameters behaviors evoke an increasing interest to understand the main dynamics lying behind them. Temperature is one of the essential quantities which affect the agriculture, economy, survival of animal and plant species. Turkey, located in the interconnection of Europe and Asia, contains various climate types. In this research, dynamics of temperature values over northeastern Turkey is investigated via nonlinear time series techniques. Monthly data set, through the period between 1960 and 2006, from various parts of the region is used to understand the underlying dynamics and its spatial distribution.
Well-known phase space reconstruction method is used to calculate the maximal Lyapunov exponent for each data set which will indicate the chaotic behavior. Along with the nonlinear time series analysis, statistical properties of the data are also determined to reveal any possible trends in the data. Calculated positive Lyapunov exponents indicate that the time series of average monthly temperature values have a possible chaotic underlying dynamics over the region.
Keywords: Chaos, Lyapunav Exponents, Turkey, Marmara, Maximum Temperature
Evaluation of Wind Energy Potential in a University Campus
by Saban Pusat, Mustafa Tahir Akkoyunlu
Abstract: Today, zero energy campus concept is a popular topic. Zero energy attempts are important for reducing global warming effect and greenhouse gas emissions. In the current study, wind characteristics and wind energy potential of Yildiz Technical University Davupaşa Campus were investigated. Data from wind measurement station (10 m height) in Campus area was examined. Due to the gaps in the measured data, one year long data was lumped by using all the measured data (25 months). The lumped data was used in all energy analyses. Mean wind speed was calculated as 3.45 m/s at 10 m and north northeast (30o) was defined as prevailing wind direction. Annual wind energy production and capacity factor for Fuhrl
Keywords: Zero energy; Wind Speed; Wind Energy Potential; Yildiz Technical University; Turkey; Wasp; University Campus.
A study on the use of propane (R-290) in vending machines as a substitute for R-134a to minimize the global warming potential
by Khaled Alkhaledi, Kenneth Means
Abstract: The refrigerant R-134a is widely used in vending machines, and it is a greenhouse gas with high global warming potential. The Unites States Environmental Protection Agency has mandated that R-134a be replaced with an environmentally friendly refrigerant. In this study, we compared the performance and safety of R-290 as a substitute for R-134a in vending machines. We compared the two refrigerants in a vending machine equipped with a single-stage compressor, four thermocouples, and a data log recorder. Our results demonstrate that R-290 performs as well as R-134a; in addition, it uses 31.4% less energy and 60% less refrigerant. The evaporator and condenser temperatures for R-290 were comparable to those for R-134a. Therefore, we conclude that R-290 is an excellent replacement for R-134a. In addition, R-134as global warming potential is 1300, while R-290s global warming potential is 3, and its ozone depletion potential is zero. Finally, R-290 can be used safely and complies with Underwriter Laboratory
Keywords: global warming potential; greenhouse gas; R-134a refrigerant; propane (R-290) refrigerant; vending machine.
The environmental impact of renewables
by LAURA MARQUEZ-RAMOS
Abstract: The aim of this research is twofold. Firstly, to introduce a trilemma of a global sustainable energy system and, secondly, to perform a quantitative assessment of the effect of renewables on the environmental impacts of electricity generation, taking into account the existing divergences between developed and developing countries.
In a multi-regional, multi-country, dynamic approach, a regression analysis is performed to determine the causal relationship between renewables and environmental indicators on climate change, human toxicity, respiratory impacts, ionising radiation, freshwater eutrophication, marine eutrophication, freshwater ecotoxicity, land use and mineral and fossil resource depletion. Results show that renewable energy consumption significantly improves environmental outcomes in both developed and developing countries. As a result, renewables represent a suitable climate change mitigation option.
Keywords: renewables; environment; developed countries; developing countries; trilemma
PERFORMANCE EMISSION AND COMBUSTION STUDIES OF DIESEL ENGINE ON JATROPHA ETHYL ESTER AND ITS HIGHER ALCOHOL BLENDS
by RAGHVENDRA GAUTAM
Abstract: Ethyl ester of Jatropha oil (JEE) was prepared using acid catalyzed transesterification method. The physico-chemical properties of JEE were determined. Blends of JEE were prepared with 5%, 10%, 15% and 20% butanol on volumetric basis. Performance, emission and heat release analysis of different blends were carried in a single cylinder diesel engine. Brake thermal efficiency (BTE) with JEE and its blends was higher than diesel. The emissions of CO, NOx, and Smoke for JEE and blends were lower while emission of HC was higher than diesel. The peak heat release rate for diesel and JEE100 were 135.41/
Keywords: Jatropha Ethyl Ester, Butanol, Performance , Emission
Technical, Economic and Environmental Analysis of a Hybrid System Containing CHP, Solar Panel, Wind Turbine with Electrolyzer and Battery as Energy Storage: Case Study
by Reza Effatnejad, Kambiz Rezapour, Farzad Vazinram
Abstract: Abstract: The environmental problems by fossil fuels and shortage of these kinds of energy cause that many governmental organization put incentive conditions to attract private companies to invest in renewable energies. In this regard, Iran has many potential of renewable resources. From view point of solar radiation, Iran has potential of installation of 60,000 MW as solar power plant and 100,000 MW as Wind power plant. In this paper the economic and environmental analysis of some available renewable resources including photovoltaic panels (PV), Wind Turbine (WT), combined heat and power (CHP) plant, reformer, electrolyzer and battery have been utilized for a hospital in Tabriz. The cost of energy (COE), internal rate of return (IRR) and net present value (NPV) of all feasible and economical combination of resources have been investigated. The input related data have been entered in HOMER software based on Tabriz climate. The simulation has been carried out for different amount of sensitivities including price of natural gas, CO2 social penalty cost, wind speed and global solar radiation. Moreover, different combination of utilization of resources from viewpoint of NPV, IRR and COE has been studied. Finally the most economic hybrid system for the mentioned hospital in different amount of sensitivities has been analyzed.
Keywords: Hybrid system; renewable resources; combined heat and power (CHP); environmental impacts; cost of energy; internal rate of return (IRR); net present value (NPV).
Climatic and Energetic Analysis of the Atmospheric Clearness Index in Saudi Arabia
by Qassem Tarawneh
Abstract: This study presents the solar potential of Saudi Arabia in terms of the clearness index (CI) to explore the effect of climate on solar irradiation. Solar irradiance polygons (SIP) are used to find the variations in solar terrestrial irradiation. The country is divided into four climatic regions based on similar weather conditions as determined by numerous studies, and the solar irradiation records in these regions are grouped into two time periods of roughly 10-years each, depending on data availability. The SIPs show a decline in solar irradiation in the second time period for all regions except the eastern region. The maximum difference between the time periods, of approximately 10.9 (MJ/M2 Day), is found in October at Alhefa station in the southwestern region, while at Khurais station in the eastern region the values of solar irradiation are very close together, within 2 (MJ/M2 Day). In the eastern region, an increase in solar irradiation was rather frequently encountered the second time period, which is unusual for Saudi Arabia and is a tendency only found elsewhere at the Tayef station in the western region. To engage in climatic interpretation and determine the effect of monthly climate conditions on solar energy, the Angstrom equation is used, incorporating data regarding solar irradiation and sunshine hours (i.e. cloud cover), to produce solar Angstrom polygons (SAP). Finally, CI is taken from the SAP to estimate the solar irradiation potential in order to compare the measured solar irradiation against what was estimated, and a maximum relative error of 11% was found. Variation in cloud cover was found to be insignificant over the two time periods, in spite of the fact that solar irradiation generally declined in the second period, which strongly indicates anthropogenic factors are at play.
Keywords: Clearness Index; climatology; Saudi Arabia; Solar Radiation; Weather Systems
The Effects of Land Cover Changes on Forest Carbon Storage in 40 Years: A Case Study in Turkey
by Uzay Karahalil, Emin Zeki Baskent, Sinan Bulut
Abstract: In this study, forest biomass carbon storage changes were estimated for a case study area of
Keywords: Carbon storage; land cover change; landscape metrics; forest dynamics; Çaykara planning unit; Uzungöl Lake.
Heat island effect on outdoor meteorological parameters for building energy-saving design in a large city in Northern China
by Mingcai Li, Jun Guo, Mingming Xiong, Cao Xiang
Abstract: The climate change and urban heat island (UHI) effects on outdoor meteorological parameters were determined by analyzing design temperatures for heating and air-conditioning in urban center, suburban and outer suburban areas in a large city in northern China. The results showed that design temperatures increased apparently over the past 20 years and decreased considerably from the urban center to suburban and outer suburban areas. The climate change and UHI impacts would lead to 1- 5 % changes in design loads, decreasing the heating design load and increasing the cooling design load as the buildings moves from outer suburban, suburban to urban areas and from the past to the present. The decrease in the heating load exceeds the increase in the cooling load, being beneficial to improve building energy efficiency. Climate change and UHI impacts should be fully considered to promote energy-saving of building design.
Keywords: climate warming, urban heat island, building energy efficiency, large city, design meteorological parameters, energy consumption, large cities, heating load, cooling load, outdoor conditions
STUDY AND ANALYSIS OF EFFICIENT GREEN COVER TYPES FOR MITIGATING THE AIR TEMPERATURE AND URBAN HEAT ISLAND EFFECT
by Chandra Mathy, Jinu Louishidha Kitchley
Abstract: Urbanization has a dynamic relationship with Land Surface Temperature (LST), which leads to urban heat island effect. It further leads to global climatic changes and global warming resulting in a decline in the quality of life and the environment. Madurai, a Temple city in Tamilnadu, India has experienced rapid urbanization that has been resulting in an Urban Heat Island (UHI) effect since 1990. Climatic data for a period of 21 years from 1990 to 2010 reveals that Madurai has experienced an increase in average LST from 38.33
Keywords: Urban Heat Island Effect; Urbanization; Land use Land cover; Land surface temperature; Green Plot Ratio; Green space; LANDSAT TM/ETM.
Adsorption of lead and copper using waste foundry sand: statistical evaluation
by ELİF HATİCE GÜRKAN, SEMRA ÇORUH
Abstract: In this study, the adsorption characteristics of lead and copper ions on waste foundry sand were investigated. Multiple regression model with dummy variables was developed to explore and model the effects of experimental factors which are metal type, adsorbent dosage and initial concentration on adsorption capacity. According to regression model, initial concentration has a quadratic effect on adsorption capacity and the effect of concentration reaches a maximum at 234.15 mg/L and becomes negative afterward. The adsorption equilibrium data were then analyzed by using various adsorption isotherm models and results have shown that adsorption behavior of two metal ions could be described reasonably well by a generalized isotherm. These results indicate that waste foundry sand could be employed as low-cost material for the removal of metal ions.
Keywords: Waste foundry sand, adsorption, lead, copper, statistical evaluation
Impacts of El Nino Southern Oscillation and the Indian Ocean SSTs on inflow to the Roseires Dam in the Sudan
by Yassin Osman
Abstract: Several studies on East Africa climate have indicated strong teleconnections between El Nino Southern Oscillation Index (ENSO) and Indian Ocean Sea Surface Temperature (SST) with the region climate. These teleconnections have resulted in severe positive and negative impacts on the hydrological system of the upper catchment of the Blue Nile which feeds the Roseires Dam in the Sudan. In this study potential impacts of these teleconnections on variability of inflow to the Roseires Dam is investigated. The objective is to investigate the relationship between these climatic indices and the river flow to enable building a forecasting tool to give a lead time prediction of inflow to the dam using lead time information of these indices. Ninety one years of annual flow (1914-2004) from El-Diem station, upstream the Dam, the Wright ENSO-SST index, and the NOAA ERSSTv3 Indian Ocean-SST indices were used in the analysis. Correlation results showed that the annual inflow to the dam has negative relation with the ENSO-SST index and SST indices from two regions in the Indian Ocean. Two probabilistic prediction models were developed. The developed models use the concept of conditional probability to forecast a certain category of the inflow (dry, average or wet year) given the condition of the ENSO-SST or Indian Ocean-SST index (hot, normal or cold). Models results showed significant improvements in the annual inflow predictability when these indices are used as predictors. The results also showed that performance of the model, using the Indian Ocean -SST as predictor, is better than performance of the model using the ENSO-SST as predictor. The models developed could contribute to better water management and operation of the dam reservoir.
Keywords: Roseires Dam, Blue Nile River, ENSO, Indian Ocean SST, drought, flood
Cutting Interval of napier grass affecting methane yield in anaerobic digestion
by Nusara Sinbuathong, Yuwadee Sangsil, Suriya Sawanon
Abstract: Digestion of napier grass at cutting intervals of 30, 45, 60 and 90 days was investigated in two-stage anaerobic reactors. Four sets of reactors with working volumes of 4 and 5 L for acidogenic and methanogenic reactors were operated at 30 ๐C. Acidogenic reactors were fed a slurry of napier grass at 200 mL/day. Hydraulic retention times were 20 and 25 days for the acidogenic and methanogenic reactors, respectively. Mixed ruminal microorganisms from cow were used as inoculum. The highest methane yield was obtained from napier grass with a cutting interval of 60 days producing 6,500 m3/ha.year.
Keywords: anaerobic digestion, biogas, bioenergy, energy crop, global warming, grass, methane, napier, waste treatment
Geographical Dispersion and Environmental Impact Assessment of Wind Power Generation in Turkey
by Zehra Yumurtacı, A. Jasin Demirhan
Abstract: In the current study, different temporal electricity generation cases
of wind farms are examined. The maximum and minimum power generation
and capacity factor variations for various regions are calculated based on the
actual data taken from the available wind power plants. Also, the amounts of
CO2 emission prevention, due to the established wind power plants in these
regions, and the related environmental impacts are studied in detail.
Furthermore, three distinct regions are taken into account for study, and its
results show that the total wind power generation for available 34 wind power
plants can go up to 1.2 GW/year in each region. By employing wind power
plants in each region, significant reductions of CO2 emissions are possible
compared to the conventional coal based power generation. For example, the
reductions of CO2 emissions are estimated to be 47,700, 770,000 and 1,032,000
tonnes/year, respectively for three regions of Mediterranean, Marmara and
Keywords: wind power; environmental impact; CO2 emissions; geographical
Nonparametric Trend Analysis of Reference Evapotranspiration for Khyber Pakhtunkhwa, Pakistan
by Ijaz Hussain, Sajid Gul
Abstract: Reference evapotranspiration (ETo ) is a key element of the hydrological cycle that integrates atmosphere demand and surface environment conditions. In this study, we aimed to determine the trend of ETo using nonparametric methods Mann-Kendall and Sens slope estimator, whereas ETo is estimated using globally accepted Food and Agriculture Organization (FAO) Penman-Montieth FAO-56 (PM) method. We used 10 years data (2000-2009) of 11 weather stations located in Khyber Pakhtunkhwa Province, Pakistan. We identified a decreasing trend in ETo rate has been recorded mostly in winter, pre-monsoon and spring with an upward trend during autumn and red-summer. Further, the statistical analysis shows a significant decreasing trend in during winter. In summary, we provide a systematic approach that may be used in agro meteorological modeling and irrigation development.
Keywords: Evapotranspiration; FAO-56 PM; Trend Analysis; Mann-Kendall; Sen0s slope estimator;Season
The Association of Weather Variables with Rice Production and Simulation of Agro-adaptation Measure for Northeast Thailand: Evidence from Panel Data Model
by Nirote Sinnarong, Kotchaporn Pongcharoen, Kasama Thaeye, Siriporn Phuntulee, Worawut Ngampiboonwet
Abstract: Climate change poses a significant threat to agriculture and global food supply. This study aims to estimate the potential impacts of weather on rice production and agro-adaptation to mitigate its impacts in northeast Thailand. Based on the rice production and weather data from 17 provinces over the 1989-2014 periods, the unit root tests and feasible generalized least squares involving a panel data model are explored to obtain reliable estimates. The results showed that weather variables have a major impact on rice production. Increase in the temperature during the crop-growing season has adverse effects on the rice production. The rainfall increases are found to increase rice production levels. To explore the potential effect of agro-adaptation, numerical simulations provided evidence that altering planting can reduce the impact of weather on rice production risk by 25.16 to 57.95% for the possible adaptations. Applying a new rice variety can reduce rice production risk by 35.50 to 44.56%. Simulation results revealed that the decrease in impact of weather on rice production can be mitigated significantly using proper management practices in terms of altering planting dates and changing rice varieties. These agro-adaptations can prevent the crop from adverse effect weather during growing period.
Keywords: rice production; weather; climate change; panel data; agro-adaptation; Thailand.
Green Transportation: Increasing Fuel Consumption Efficiency through HHO Gas Injection in Diesel Vehicles
by Sharaf Alkheder
Abstract: Oxy-Hydrogen (HHO) is a non-toxic gas that is used as a supplement to any engine working on Petrol, Diesel, Heavy oil, Acetylene, Propane, Kerosene, or LPG. Through adding HHO to the air intake manifold engine and injection into the cylinders, where HHO mixes with fuel, an increase in mileage of engine performance; enhancement of hydrocarbon fuel combustion; lower emission rates and an increase in fuel efficiency are observed. HHO gas is produced through the electrolysis process of different electrolytes (Hydrogen generator). This study examines the effect of HHO gas, that was directly injected into a single cylinder diesel engine, on the manifold intake air at varying operating speeds of 1500-3000 rpm in diesel engine. The experiments demonstrated positive results including (13.87-15.48%) fuel consumption reduction, lower exhaust temperature, and consequently a reduction in pollution. Furthermore, results indicated that the injection of HHO improved the combustion efficiency and increased the brake thermal efficiency by an average of approximately 17.1%. It also decreased brake specific fuel consumption and gases' exhaust temperature. In addition, the optimal surface area of an electrolyte needed to generate sufficient amount of HHO was found to be thirty six times that of the piston surface area, and also the volume of water needed in the cell is about one and half times that of the engine capacity.
Keywords: Direct injection; Diesel; HHO gas; Brake thermal efficiency; specific fuel consumption.
Historically evolved practices of the Himalayan transhumant pastoralists and their implications for climate change adaptation
by Suman Aryal, Jeeban Panthi, Yub Raj Dhakal, Narayan Prasad Gaire, Kabita Karki, Narendra Raj Joshi
Abstract: The people living in the agrarian societies develop different strategies in response to climatic variability and environmental uncertainties. Transhumant pastoralists in the Himalayas are among those who follow natures rhythm of seasonality. The traditional practices built in groups experience might be useful to adapt with climate variability and change. Therefore, this study aims to 1) study perceptions of transhumant herders towards changes in key climatic variables and validate them with observed data; 2) explore traditional practices of transhumant herders and their significances for climate change adaptation in Khaptad National Park, far-Western Nepal. Data were collected by means of semi-structured interview and focus groups discussions. The results showed that the perceptions of transhumant herders match with observed climatic trends in many instances and herders traditional strategies have potential in reducing risk from climate change. The findings indicate that the historically evolved practices might be useful for climate change adaptation.
Keywords: adaptation strategies; climate change; Himalayas; Nepal; pastoralists; perceptions; transhumance; trends.
Integrating metaheuristics and Artificial Neural Network for weather forecasting
by Mustafa Gocken, Asli Boru, Ayşe Tugba Dosdogru, Mehmet Ozcalici
Abstract: Over the years, researchers have been analyzing to forecast the weather as precisely as possible in order to provide the better living conditions. Nevertheless, there is no consensus on the effective weather forecasting methods and therefore, research on providing applicable and effective forecasting methods has been continued. In this study, Artificial Neural Network (ANN)s are integrated with two metaheuristic methods including Genetic Algorithm (GA) and Harmony Search (HS) to determine the most relevant input variables and to search the most appropriate number of hidden neurons. Proposed forecasting methods are implemented for six different cities of Turkey that are selected according to Aydenizs Climate Classification. The results of the graphical analysis and performance measures show that daily mean temperature forecasting is improved by GA-ANN and HS-ANN methods due to the ability to capture the advantages of metaheuristic and ANN simultaneously.
Keywords: Artificial neural network; Genetic algorithm; Harmony search; Weather forecasting.
Temporal analysis of reference evapotranspiration to detect variation factors
by Mohammad Valipour, Mohammad Ali Gholami Sefidkouhi
Abstract: There are many factors that can change reference evapotranspiration
(ET0). In this study, after comparison of six reference evapotranspiration
equations, variations of each model have been investigated to detect main
factor(s) of temporal changes of ET0 from 1981 to 2010 in Goragn, Iran.
Although Priestley-Taylor (PT) estimates ET0 is more identical to FPM than
the other equations during 30-year period, the results show that accuracy of PT
is reduced after 2000. The study of variations of temperature, relative humidity,
wind speed, and sunshine, underlines that there is a considerable difference
between the averages of the weather variables before and after 2000. Compared
to 19811999, the average of wind speed has been increased more than three
times after 2000 that it introduces the wind speed as the most important
variable for changes of ET0 and alarms a climatic change in Gorgan, Iran.
Keywords: climatic change; Iran; Mann-Kendall test; trend analysis; wind speed.
INCOME ELASTICITY OF WILLINGNESS-TO-PAY FOR A CARBON TAX IN GREECE
by Stefanos Nastis, Konstadinos Mattas
Abstract: Climate change policy is steadily gaining momentum and is being implemented at the national and international level. The European Union has been committed to control and reduce greenhouse gas emissions, implementing rigorous climate change policy. The aim of this study is to provide the first willingness-to-pay and income elasticity of willingness-to-pay estimates for the reduction of greenhouse gas emissions through a carbon tax in Greece. Based on a survey of 1393 adults, households are willing to pay, on average, an annual carbon tax of 81 for the next ten years in order to reduce greenhouse gas emissions by 17% by 2025. Furthermore, results confirm that income elasticity of willingness-to-pay for climate change isnt constant, but increases with income, from 0.48 for low income households to 1.40 for high income households. The full sample income elasticity of WTP was estimated at 0.96, raising distributional questions regarding the social profitability of any climate change policy and the probability of public acceptance.
Keywords: EU climate policy; contingent valuation; willingness-to-pay; income elasticity of willingness to pay; non-market valuation; carbon tax.
A deterministic carbon footprint modeling across the supply chain of electricity
by Fatemeh Dalir, Majid Shafiepour Motlagh, Khosro Ashrafi
Abstract: Electricity sector is one of the major contributors to climate change and global warming. Hence, decarbonization of electricity which is generated by current technologies is inevitable. For a better policy implementation in energy portfolio, this paper presents a deterministic carbon footprint model for frame F fossil fuel power plant from raw material until the product is delivered to the end user. The model has been designed to cover the effect of investigated parameters. Controlling the investigated parameters can reduce carbon footprint of electricity through its life phases. The distinguished feature of the proposed model is the integration of raw material, operation of the power plant and transmission and distribution phases. The result shows good agreement between statistical data and proposed model.
Keywords: carbon footprint; power plant; electricity transmission and distribution.
The use of response surface methodology (RSM) for modeling of lead (II) removal from industrial waste by pumice and vermiculite
by N. Gamze Turan
Abstract: The main objective of this work was to investigate the feasibility of pumice and vermiculite as the sorbents for lead (II) removal from industrial waste using Box-Behnken method. Batch adsorption method was used in order to evaluate the feasibility. Experiments were carried out as per Box-Behnken surface statistical design with three input parameters namely pH (2-5-8), adsorbent concentration (10-50-100 mg L-1), and contact time (5-30-120 min). Regression analysis demonstrated good fit of the experimental data to the linear model with coefficient of determination () values of 91.49% and 98.51% for vermiculite and pumice, respectively. Optimization of pH (2-2), adsorbent concentration (57.81-75 mg L-1), and contact time (89.06-5 min) gave a maximum of 99.99% lead (II) removal for vermiculite and pumice, respectively.
Keywords: Box-Behnken design; ANOVA; vermiculite; pumice; lead (II) removal.
Complex analysis for the climate change impact on the nuclear industry incorporated with the green energy
by T.A.E. H.O. WOO
Abstract: The economic value based investigation is performed for the nuclear energy incorporated with the global warming in which the dynamical simulations are performed. The nuclear power source is studied for the climate consideration in the aspect of the justification of energy usage. The price of the relevant energy is examined for the modeling, which is analyzed by the climate change related quantifications for the improved energy policy incorporated with the anticipated carbon quantity. In the simulations, the earlier time has much higher values comparing to the later part, which means that the impact of the nuclear energy for climate is effective. Most minus values are shown in the simulations where the climate impact related with global warming decreases gradually. However, the abrupt jumping up value is on 2083.25th year when the impact of nuclear energy by climate change is abnormal status in this study.
Keywords: Climate change; Global warming; Nuclear energy; Economy; Plant.
Special Issue on: Developments in Carbon Capture, Utilisation and Storage
Supercritical drying: A promising technique on synthesis of sorbent for CO2 capture
by Yong Kong, Xiaodong Shen, Sheng Cui, Maohong Fan
Abstract: The objective of this paper is to present a new technique, supercritical drying (SCD), for CO2 capture, utilization and storage (CCUS). To investigate the effect of drying methods on the structure and CO2 capture performance of an aerogel sorbent, amine hybrid silica aerogel (AHSA) was prepared by SCD and ambient pressure drying (APD). The characterization results of N2 adsorption/desorption, scanning electron microscopy and X-ray photoelectron spectroscopy measurements demonstrate that the pore structure and surface amine content of the sorbent are significantly improved because of the use of SCD. The CO2 adsorption capacities of AHSA dried by SCD are much higher than that of AHSA dried by APD. The CO2 adsorption kinetics of the adsorbent under different conditions was also investigated. The results reveal that the sorbent preparation method is inspiring and its resulting sorbent is dynamic in low-concentration CO2 capture.
Keywords: CO2 capture; supercritical drying; aerogel; sorbent; adsorption
Analysis of the Impact of CO2 Content on the Physical Properties of the Liquid Phase Mixtures in Oil Production Wells
by Jiaming Zhang, Xiaodong Wu, Zhangxin Chen, Jingyao Wang, Zongxiao Ren
Abstract: CO2 injection not only enhances oil recovery dramatically, but also it has a potential to reduce the greenhouse effect. During the process of CO2 displacement, when CO2 breaks through in oil production wells, CO2 content will impact the phase state and physical properties of the liquid phase mixture in wellbore. As a result, it will affect the calculation of temperature and pressure in oil production wells. Therefore, it is unacceptable to use the conventional black-oil model for calculating the phase state of miscible fluids. For dealing with this problem, we use a gas-liquid flash theory and a compositional model to develop a new model. The Jilin oilfield is used as a case study; the phase state (gas, liquid or gas-liquid) and physical properties of the liquid phase mixture (including CO2 and hydrocarbons) under initial conditions are calculated by this new model. The results indicate that the molar content of CO2 has a great impact on the physical properties of the liquid phase mixture in oil production wells under certain temperature and pressure. A scientific guide for the calculation of temperature and pressure in oil production wells can be provided with the developed model.
Keywords: CO2 displacement; gas-liquid equilibrium; constituent; flash
Improving Water-Alternating-CO2 Flooding of Heterogeneous, Low Permeability Oil Reservoirs Using Ensemble Optimization Algorithm
by Changlin Liao, Xinwei Liao, Longxin Mu, Xianghong Wu, Jing Chen, Hongna Ding, Feng Xu
Abstract: Injecting CO2 into reservoir has been proven to be not only a feasible method for improving ultimate oil recovery, but also reducing CO2 emissions and greenhouse effects. In this paper, the advantages of optimization algorithm and numerical simulation are combined to establish mathematics model of production optimization of Water-Alternate-Gas (WAG) flooding. Augmented Lagrange function (ALF) and logarithm transformation (LT) are applied to convert constrained problems into unconstrained ones. The ensemble optimization algorithm (EOA) is used to solve the latter. Then, the optimization technology of reservoir production is formed. The optimization technology is applied in a low permeability oil reservoir to test its feasibility of improving oil production. The results indicate that the CO2 swept efficiency, miscible region and recovery, can be effectively improved by the optimization technology which increases the economic benefit of the reservoir.
Keywords: CO2 Injection; CO2 storage; Ensemble optimization algorithm; WAG; Oil reservoir
Implementing carbon capture, utilisation and storage (CCUS) in the circular economy
by Wojciech Budzianowski
Abstract: The circular economy relies on closing materials loops and using renewable energy sources (RES). It benefits from turning wastes into resources thus reduces pollution and improves local resource base. It is therefore a useful strategy for the valorisation of CO2, which is today mostly released into the atmosphere. The current conceptual study shows that in order to stabilise atmospheric CO2 concentration below 500 ppm CO2 by 2100, the future global circular economy will require high penetration of RES and energy efficiency together with the implementation of carbon capture, utilisation and storage (CCUS). CCUS needs to be configured to close carbon loops and fit into the future rich matrix of technologies. Preferable CCUS technological options need to meet the requirements of cost-effectiveness and fitting local conditions. This study focuses on analysing (i) symbioses between CCUS and other co-existing technologies, (ii) economic instruments suitable for implementing CCUS in the circular economy, (iii) techno-economic performance of CCUS and (iv) impacts of CCUS implemented in the circular economy on economic development. Thus CCUS is put in a perspective that will allow for optimal CCUS configuration based on informed decisions. The results emphasise that in the short term (a few decades), CCUS will need to combine the utilisation and storage of CO2, focusing on the deep reduction of CO2 emissions. In the long term (beyond 2050-2100), the CO2 storage option might be no longer required while the CO2 utilisation coupled to RES will still provide carbon resources for the circular economy. Choices regarding CCUS are highly complex and interdisciplinary conceptual studies are needed to guide future low-carbon transformations.
Keywords: circular economy; CCUS configuration; symbiosis; economic instrument; business line; economic development
The influence of Carbon Capture and Compression Unit on the Characteristics of Ultramodern Combined Cycle Power Plant
by Janusz Kotowicz, Mateusz Brzęczek, Marcin Job
Abstract: In this paper the influence of carbon capture and compression unit on the characteristics of ultramodern combined cycle power plant is presented. The chemical absorption of the CO2 from the flue gases using MEA in the carbon capture unit was used. The effective use of heat recovered from the turbine blade cooling air in order to increase the efficiency of combined cycle power plant with the carbon capture and compression unit is proposed. The power plant is analyzed in a wide range of compression ratios and temperatures in the gas turbine. Thermodynamic and ecological characteristics of this combined cycle unit as a function of the basic operating parameters are made. The equation connecting the efficiency of combined cycle power plant with and without the carbon capture and compression unit is proposed. The calculations indicate that the reduction of energy consumption of the absorbent by 1 MJ/kgCO2 causes an increase in net electric efficiency of the unit by 1.25 percentage points. The analyzed combined cycle power plants are characterized by the highest electricity generation efficiency achievable for large energy units and exceptionally low CO2 emissions, lower than 41 kg/MWh throughout the analyzed range of compression ratio.
Keywords: carbon capture, compression unit, post-combustion, combined cycle, gas turbine, chemical absorption, thermodynamic analysis, ecological analysis, CO2 emissions,
Upgrading the integration of supercritical coal-fired power plant with post-combustion CO2 capture process through process simulation
by Jian Chen, Xiaoyan Liu
Abstract: The purpose of this study is to alleviate the negative effect of post-combustion CO2 capture (PCC) process on the generating efficiency of a 600 MWe supercritical coal-fired power plant (CFPP) through modelling and simulation. Steady state models for a 600 MWe supercritical CFPP and a MEA-based PCC plant with corresponding compression unit were developed and integrated in Aspen Plus. In the two basic cases with steam extracted from different locations, efficiency penalty of 14.48% points and 11.89% points were caused, respectively. Subsequently, four steps were taken to improve the overall performance of the integrated process, which involves: (1) waste heat recovery, (2) throttling loss reduction, (3) capture flowsheet modification, and (4) temperature difference narrowing. From the final simulation results, the efficiency penalty is reduced to 8.07% points. This study indicates that appropriate flowsheet modifications for the integrated process can significantly improve the overall energy efficiency.
Keywords: process simulation; flowsheet modification; supercritical coal-fired power plant; post-combustion CO2 capture; efficiency penalty.
Process Simulation and Energy consumption for CO2 Capture with different flowsheets
by Boyang Xue, Yanmei Yu, Jian Chen
Abstract: In this work, a systematic simulation study of post-combustion CO2 capture process is presented. Including six individual process modifications and six combinations of process modifications, thirteen different process configurations are simulated using aqueous monoethanolamine (MEA) and diethanolamine (DEA) solutions. Process modifications presented a good performance with respect to the reduction of energy consumption. It is carried out with 3.45% to 13.45% of reduction for MEA and 2.36% to 14.10% for DEA. Furthermore, a detailed analysis is presented to study the effect of three significant parameters in capture process, i.e., CO2 loading of lean amine solvent, pinch of heat exchanger and stripper pressure. This work presents the influence of the combination of solvent and process, as well as the combination of different processes on energy consumption, which are essential in post-combustion process design to make optimization strategy.
Keywords: CO2 capture, absorption, process simulation, flowsheets, energy consumption
Analysis of efficiency of zero-emission oxy-type ultra-supercritical power unit based on high-temperature membranes
by Adrian Balicki, Janusz Kotowicz
Abstract: Oxy-combustion technology by eliminating, in the stage of preparation of oxidant, atmospheric nitrogen from combustion process is characterized by a high concentration of carbon dioxide in the exhaust gas, and thus, facilitates its sequestration. Power unit that operates in classic (air) combustion technology with a gross power output similar to the power of the investigated model is characterized by a CO2 emission of 860 kg/MWh. The use of oxy-combustion allows to reduce the carbon dioxide emissions by more than 90%, so it is worth to present both thermodynamic and economic consequences of the introduction of this technology. Thermodynamic analysis of the model assumed investigation of the impact of changes in the oxygen recovery rate on the basic characteristics of the power unit. In the next stage of calculations the estimated capital expenditures and a break-even price of electricity under the assumption that NPV is equal to zero were determined.
Keywords: oxy-combustion; zero-emission power unit; thermodynamic analysis; economic analysis; high-temperature membranes; carbon dioxide; clean coal; carbon capture; CFB boiler; efficiency enhancing; NPV analysis
Special Issue on: Climate Literacy and Innovations in Climate Change Education
The role of farmers perceptions in coping with climate change in Sub-saharan Africa
by Sadia Cherif, Walter Leal Filho, Ulisses Azeiteiro
Abstract: Global climate change represents one of the most important challenges of modern times, and policy makers have a crucial role to play in the definition of policies to tackle it. In terms of Africa, the priority is to explore the means to help African policy makers at the national level- to deal with uncertainties relating to climate change. This also includes assistance in defining the right adaptation policies. Indeed, among specific stakeholders such as farmers, perceptions of climate change are translated into decisions pertaining to agricultural practice and with regard to their autonomous adaptation strategies. These should, ideally, be based on sound scientific information so as to positively impact them. rnThis paper challenges and calls for setting at the heart of public adaptation policies in Sub-saharan Africa, the significances socially constructed of the rural communities, commonly known under the concept of perception. It takes as a starting point several case studies of rural world actors perceptions (farmers, nomads) and strategies of adaptation listed in the literature as well as empirical studies in progress. A special emphasis is given to the problem and barriers caused by the ignorance of local knowledge in decision making which, in turn, prevents the action against current and future harmful effects of climate change at a local level. Finally, some principal inputs which may be useful in order to define adequate strategies of adaptation and allow vulnerable populations to effectively face the consequences of climate change are outlined. Experiences gathered in this paper will be of interest to African governments for national policy definition being given the increasing need for support of farmers in applying relevant strategies. rn
Keywords: Rural communities; perceptions; strategies of adaptation; public policies;Sub-saharan Africa.
Lived experience of climate change a digital storytelling approach
by Daniel Otto
Abstract: While the term climate change is firmly anchored in the global discourse, its visibility is often vague and subliminal. Education
Keywords: digital storytelling; climate change; lived experience; higher education; interdisciplinary; e-learning; blended-learning; sustainable development; virtual learning; constructivism
Climate Change Education and Literacy at the Faculty of Physical and Mathematical Sciences of the University of Chile
by Maisa Rojas, Claudia Mac-Lean, Juan Morales, Andres Monares
Abstract: Considering the role that Higher Education Institutions (HEIs) play in terms of catalysing change within societies, over the past years, sustainability initiatives within HEIs have flourished worldwide. Likewise, the scientific evidence of anthropogenic climate change has been on the political and academic agenda for decades, thus the importance of ameliorating climate change education and literacy both at the society and university training levels. Accordingly, certain questions arise: What are the most effective current climate change educational methodologies? Which road map would be the most appropriate to be suggested to HEIs to promote climate change literacy for future professionals? In order to begin addressing these questions, the Faculty of Mathematical and Physical Sciences of the University of Chile (FCFM) approach to climate change teaching and literacy is here described. The later contemplates the history of the institutionalisation of sustainability at the FCFM, collection of courses and Minors for students which incorporate climate change related-topics, as well as climate change related research centres.
Keywords: climate change, global warming, education, literacy, sustainability, engineering, sciences.
Making climate change public? A dramaturgically inspired case-study of learning through transition management
by Katrien Van Poeck, Joke Vandenabeele, Gert Goeminne
Abstract: This article reports on an in-depth case study aimed at understanding the process of public-formation around contested sustainability issues such as climate change. We analyse a so-called transition arena established by an urban government in order to realise a climate neutral city through a transition management process. Scrutinising this case, we are particularly interested in the interrelatedness of educational and political processes in such a non-formal learning setting. That is, we build on this empirical analysis so as to further conceptualise educations role in tackling societal challenges.
Therefore, we combine a conceptual framework drawing on Noortje Marres distinction between privatisating and public-ising forms of issue formation with a dramaturgical analytical framework that puts the setting in which public participation takes place centre stage. This performative perspective allows us to grasp the co-production of public and issue, that is to say the concrete ways in which the design of a setting shapes and transforms not only the issue at stake but also the public involved in it.
Connecting our findings to recent theory development in (environmental and sustainability) education research allows us to conceptualise climate literacy and teaching and learning about global climate change as a political-educational process. The development of a climate literate public, we argue, cannot be limited to learning predefined answers but should rather enable people to think critically in relation to taken-for-granted norms by opening-up democratic spaces where people can discuss and discover options through the exploration, evaluation, and critique of emerging ideas and the creative contribution to their development.
Keywords: education; climate change; global warming; transition management; controversy; environmental literacy; case study; public pedagogy; dramaturgical analysis; climate change education; environmental education
Power plant workers knowledge, attitudes and behavior on climate change
by Constantina Skanavis, Evangelos Manolas, Aristea Kounani, Konstantinos Fergadis
Abstract: This paper assesses the knowledge, attitudes and behavior of the workers in the local station of the Greek Electric Company at Skyros Island in Greece on the issue of climate change. The research was carried out in January 2015. The methodology used was interviews through questions formed as a result of the study of the relevant bibliography on knowledge, attitudes and behavior on environmental issues and particularly issues related to climate change. The findings showed that there was a misunderstanding of the term of Global Climate Change. Most of the time power plant workers attitudes seemed to be environmentally friendly, never the less their behavior appeared to be influenced by their personal interests and benefits, rather than the global well-being.
Keywords: Global Climate Change; Environmental behavior; Power plant workers; Environmental attitude; Greece
Climate literacy: a systematic review and model integration
by José Azevedo, Margarida Marques
Abstract: C.P. Snows division between cultures is visible in scientific literacy (SL) research: there is a gap between the science education and the science communication fields. We reflect on a way to end this critical disparity. To this end, we choose the case of climate change as a situational prototype that helps to unite broad communication issues and established knowledge.
The choice of this case is justified by the current international interest and calls for the development of a climate-literate public. The scientific community has collected cumulative evidence supporting climate change and the human responsibility in the changing climate system. Yet, climate literacy (CL) research has shown that misunderstandings about climate change can persist even after instruction and that some scepticism emerged in several developed countries. This may be associated with a low adoption of proactive behaviours by todays citizens related to climate issues.
This work aims to bolster the utility of literacy" as a conceptual tool for science promotion among students, climate-related professionals and laypeople. Thus, we conducted a literature review of CL research in the last decade, focusing on the conceptualisation of this term in education and communication approaches. The analysis resulted in a new integrative model for understanding literacy.
We hope that the proposed model can be the basis for the re-emergence of science literacy as a key concept, of well-grounded practices and of accurate measurement tools.
Keywords: science literacy, science education, science communication, climate literacy, literature review
CLIMATE CHANGE EDUCATION FOR SCHOOL STUDENTS- ACTIVITY BASED TEACHING LEARNING APPROACH TO CREATE KNOWLEDGE, ATTITUDES AND SKILLS FOR BEHAVIOURAL CHANGE
by Gopalsamy Poyyamoli, Ramadoss Alexandar
Abstract: India is one of the worlds most vulnerable countries to climate change. A number of studies and synthesis reports have concluded that climate change is inevitably underway and that human modification of the natural ecosystems, landscape and the atmospheric composition of greenhouse gases are likely to be the most dominant forces. Most of the people in our society, are still unaware, unconcerned and ignorance on the serious issue of climate change. Climate change education promotes not only knowledge of the environment, and the associated challenges, but also fosters attitudes and motivations to mitigate, adapt and coping with climate change. The main Objectives of this study were to facilitate the necessary knowledge, skills, attitudes and behavior focused on climate change and global warming with school students in Puducherry and Villupuram district of Tamil Nadu. The sample size consisted of 180 students from two middle and high schools from urban and rural areas of Puducherry and Villupuram districts. The selected students were divided into two groups in which forty five students were experimental and the remaining forty five were kept as control groups for each school. The experimental group students were facilitated with climate change education program. It has been concluded that the activity based and experiential teaching, learning approach for climate change education program is more effective among school children.
Keywords: Climate change, multiple method, Knowledge, Attitudes, Behavior
Climate Literacy among University Students in Mexico and Spain: Influence of Scientific and Popular Culture in the Representation of the Causes of Climate Change
by Mónica Arto-Blanco, Pablo Ángel Meira-Cartea, José Gutiérrez-Pérez
Abstract: This article analyses climate literacy among university students, using their
knowledge of the causes of climate change. Based on the theory of social representation,this comparative study examined a sample of 503 students. Using drawings and text,students were asked to respond to the question What is climate change? They then completed an ad hoc survey. Qualitative and quantitative analysis of the data revealed that most students recognized human responsibility in climate change but demonstrated gaps in their understanding of the phenomenon. The results show that more specialized university education in the natural and technological sciences did not translate into more accurate representation, which was affected by common culture and scientific representation. In light of these findings, we offer recommendations for incorporating climate change into higher education curricula.
Keywords: Climate change, global warming, causes, climate literacy, higher education.
Integrative Education for Climate Change Resilience x Sustainable Development Transformations
by Timothy J. Downs, Nikita Golovko
Abstract: To meet societys need to better understand and respond to complex, interwoven problems of climate and sustainability, we herein introduce an integrative framework being applied in a U.S. university setting for conceptualizing, designing and deploying educational programs that interconnect climate change resilience (CCR) with sustainable development (SD). The framework weaves together five main strands of integration: 1) socio-political stakeholder interests and influences; 2) development sectors; 3) knowledge types; 4) socio-technical capacities, including education; and 5) the smart networking of project sites across varying geographical scales. We pose and answer: What kinds of integrative educational programs, curricula and project practicums can enable transformations in CCRxSD practice? A philosophical foundation undergirds the knowledge and skills base of the suggested programming. Two collaborative case studies illustrate integrative practicums: 1) Fisherville Mill Site, Grafton, Massachusetts, USA a showcase in urban sustainability; 2) Fijian Islands - a prospective case study in integrative CCRxSD program design.
Keywords: integrative approach; climate change resilience; sustainable development; social learning; graduate education.
Special Issue on: GCGW2015 Energy, Transportation and Global Warming
Environmental Impact Assessment of Renewables and Conventional Fuels for Different End Use Purposes
by Canan Acar, Ibrahim Dincer
Abstract: In this study, we present a comparative environmental impact assessment of renewables and conventional fossil fuels for electricity and hydrogen generation. The conventional fossil fuels investigated in this study are coal, oil, and natural gas. Renewables considered in this study are geothermal, hydropower, ocean, solar, and wind energies. Furthermore, nuclear and biomass energies are taken into consideration while assessing environmental impact and performances. Environmental impact criteria considered in this study are CO2, NOx, and SO2 emissions, land use, water consumption, water quality of discharge, solid waste and ground contamination, and biodiversity. For comparison purposes, all collected data are normalized and ranked between 0 and 3 while 0 giving highest negative environmental impact and 3 giving lowest negative environmental impact. Our results showed that overall, in terms of both electricity and hydrogen production, ocean gives the highest rankings (2.71 for electricity and 2.73 for hydrogen). Coal has the lowest rankings in terms of environmental impact (0.26 for electricity and 0.30 for hydrogen).
Keywords: Global warming, emissions, energy, exergy, electricity, hydrogen, renewables.
Experimental Investigation to Reduce CO2 Emission in a Single Cylinder CI Engine Using Low Carbon Fuel Blend with Karanja Oil Methyl Ester and Amine Injection in the Exhaust Manifold
by Thiyagarajan Subramanian, Edwin Geo, Leenus J Martin, Nagalingam B
Abstract: The present study investigates various methods for reduction of CO2 emission in a Karanja oil methyl ester (KOME) fueled single cylinder CI engine. Combustion of KOME emits more CO2 due to longer carbon chain. The reduction in CO2 emission was done in three phases. In the first phase, low carbon pine oil (PO) fuel was blended with KOME in equal volume. The results indicated 7% reduction in CO2 emission for KOME-PO blend compared to KOME. In the second phase, methanol, n-butanol and acetone were blended on 20% volume basis with KOME-PO blend for further CO2 reduction. Mono ethanol amine (MEA) was injected in exhaust for achieving minimum CO2 emission in the third phase. KOME-PO+MEA injection emits minimum CO2 emission compared to other blends. However, considering NO-CO2 tradeoff, KOME-PO + methanol with amine injection is optimum for simultaneous reduction of both the pollutants.
Keywords: Global Warming; CO2 emission; Karanja oil; Pine oil; Mono ethanol amine; methanol; acetone; n-butanol
AN ENVIRONMENTAL AND ECONOMIC EVALUATION OF THE LIGNITE POWER GENERATION SYSTEM BY USING THE LIFE CYCLE ANALYSIS PRINCIPLES
by Dimitrios-Sotirios Kourkoumpas, Georgios Stamatiou, Sotirios Karellas, Panagiotis Grammelis, Emmanuel Kakaras
Abstract: The present study aims to evaluate the power generation system based on the lignite fuel in environmental and economic terms. Three alternative firing cases are examined: 1) raw lignite firing, 2) 30% pre-dried lignite co-firing and 3) 6% biomass co-firing case. The implementation of the Life Cycle Analysis (LCA) methodology proves that the overall environmental footprint can be decreased by as much as 4.5% in the case of pre-dried lignite co-firing, while the lignite mining activities represent about 32% of the total. The implementation of the Life Cycle Costing (LCC) methodology indicates that the total electricity generation cost is decreased by about 0.92 /MWhe in the case of pre-dried lignite co-firing and about 1.22 /MWhe in the case of biomass co-firing. A sensitivity analysis based on the total net electric efficiency, the raw lignite composition, the CAPEX-OPEX of the power plant, the biomass direct fuel cost and the external cost of CO2 was carried out, in order to identify the range of the results depending on the impact of each parameter.
Keywords: life cycle analysis; life cycle costing; global warming; lignite; externalities; Greece
ANALYSIS OF THE START-UP AND VARIABLE LOAD OPERATION OF A COMBINED CYCLE POWER PLANT FOR OFF-GRID MINES
by Alberto Romero, Ricardo Chacartegui, Monica Carvalho, Jose A. Becerra, Dean Millar
Abstract: Mining is an economic activity that intensively uses energy in the extraction and processing of raw minerals. This means that large amounts of Green House Gas (GHG) emissions are released into the atmosphere. Natural gas in conjunction with combined cycle power plants (CCPP) could replace other more contaminant sources of energy, such as diesel, the fuel traditionally preferred in mining to generate power in remote sites. Today, however, the operation of CCPP in stand-alone power systems under frequent load variations and potentially plant start-ups remains challenging. During start-up operations of combined cycle power plants (CCPP), high thermal and mechanical stress negatively affects the heat recovery steam generator (HRSG) components. Special off-grid CCPP applications require additional considerations regarding design and operation. rnMotivated by the challenges associated with using CCPPs in off-grid mines as a main source of electrical power, a mathematical model of a CCPP was developed to evaluate load changes during operation as start-up and shut-down procedures. Using the model two strategies aiming to minimize life consumption of steam drum were investigated: gas turbine exhaust gases bypass for a given time interval and GT warm-up hold. The results show how they reduce the steam drum stresses and the lifetime consumption. Nevertheless it was found under the tested profiles that bypass or warm-up hold of the GT may induce additional fatigue cycles during the plant start-up operation.
Keywords: Combined cycle; Energy in Mining; Transient operation; Numerical modelling; off-grid mines.
INDUSTRIAL WASTE MATERIALS AND NATURALLY OCCURRING MINERALS AS INEXPENSIVE OXYGEN CARRIERS FOR CHEMICAL LOOPING COMBUSTION
by Lori Nalbandian, Antigoni Evdou, Vassilis Zaspalis
Abstract: Chemical Looping Combustion (CLC) offers a solution for CO2 separation without energy penalty by using a solid oxygen carrier to transfer the oxygen to the fuel, instead of air. In place of costly manufactured oxygen carrier materials, cheap, naturally occurring minerals and solid industrial waste materials with comparable compositions are needed. Such materials should have a sufficient reaction rate and Oxygen Transfer Capacity, retain stable performance under a large number of consecutive reduction / oxidation cycles, and if possible would not require pre-treatment and activation. Two inexpensive iron containing minerals, a Fe-Mn based mineral from Egypt and Attapulgite, a Fe-containing Mg-Al phyllosilicate mineral from Greece, as well as a Fe-Mn based solid industrial waste are investigated in this study as candidate oxygen carriers for CLC. The materials are tested in a laboratory bench-scale test unit for the evaluation of their performance and their ability to retain stable performance under a large number of consecutive reduction / oxidation cycles. Methane is used for the fuel oxidation step, while subsequent oxidation of the solid is performed with gaseous oxygen. The stability of the materials is evaluated during 5-10 subsequent cycles, comprising of a solid reduction and an oxidation step. All the samples exhibited the ability to deliver their lattice oxygen to the fuel and to some extent regain it, in the presence of air. The 3 different materials presented different performance characteristics concerning their Oxygen Transfer Capacity, OTC (0.35-4 % wt), their reactivity towards CH4 (50-100%) and their stability (50% drop up to 200% increase of their initial OTC after 5 redox cycles). Samples of both fresh materials and materials used in several redox cycles were physicochemically characterized by using X‒ray Diffraction (XRD) and Scanning Electron Microscopy combined with X‒ray Microanalysis (SEM-EDS). The crystalline phases present as well as the particle size and morphology were examined for the fresh and used samples in order to identify structural and morphological changes and thus determine the stability of the examined materials in repetitive CLC cycles
Keywords: Chemical Looping Combustion; CLC; low cost; oxygen carrier; iron manganese minerals; attapulgite; industrial waste; Oxygen Transfer Capacity.
TRANSPORT SECTOR ADAPTATION: ACTIONS AND PROSPECTS
by George Giannopoulos
Abstract: Governments so far have focused on mitigation strategies to reduce GHG emissions, on the grounds that they reduce the level of adaptation required in the future and prevent costly impacts. Mitigation has been referred to as the number one preparedness strategy. However, in view of the increased uncertainty and economic hardship worldwide that prevents governments spending and the quick pace of arrival of the anticipated adverse effects from climate change, growing attention is placed now on adaptation in the form of preventive actions that will enhance intra- and cross-sectorial resilience in all sectors of the economy. rnThis paper focuses on the Transport sector - a key economic sector of todays society and aims to examine the issues and prospects related to the adaptation of this sector in order to face the future climate change related events. In other words what will be the main issues, constraints, and policy guidelines that will help reduce the vulnerability of todays transport systems against actual or expected Extreme Weather Events (EWE) and other Natural Hazards (NH) that will result from the changing climate in the planet.rn
Keywords: Transport Adaptation, Global Warming, transport policy, preparedness strategy, Climate adaptation
The Driving Factors of CO2 Emissions from electricity generation in Greece: An Index Decomposition Analysis
by Danae Diakoulaki, Dionysis Giannakopoulos, Sotirios Karellas
Abstract: The scope of this paper is to investigate the driving factors of CO2 emissions from electricity generation in Greece and to compare the revealed trends with the overall progress recorded in EU-28. The analysis covers the period 2005-2012 and focuses on the effect produced by the following determinant factors: a) economic growth, b) electricity intensity of the economy, c) electricity trade, d) fuel mix, and e) efficiency of electricity generation process. Decomposition Analysis is widely recognized as a powerful tool for detecting the driving forces behind changes of various indicators over time. The model developed in this study is based on LMDI-I method which is increasingly used in a wide range of applications because of its several theoretical and practical advantages. The obtained results show that the economic crisis that occurred in the middle of the examined period has substantially influenced the evolution of CO2 emissions. Specifically, in times of economic growth the main factors counterbalancing the economic growth effect was the change in the fuel mix and to a lesser extent the more efficient use of electricity in the economy. On the contrary, the economic downturn has driven emissions down but at the same time it contributed to a less efficient use of energy resources in power generation and of electricity in the final demand sectors, which resulted in an upward trend of emissions.
Keywords: Electricity generation, CO2 emissions, Global Warming, Decomposition Analysis, Divisia
Exploring possible impacts of sea level rise: the case of Izmir, Turkey
by HIFZI AKSOY, Hande Demirel, Dursun Zafer Seker
Abstract: Due to global warming and climate change, sea levels worldwide have been rising significantly since the early 1990s, where most of the coastal areas are under inundation risk. The impacts of such expose could be global, regional and local. According to results of global models, among other metropolitan areas in the world, İzmir will be one of the riskiest cities will be affected by the optimistic sea level rise. Within this study, the vulnerability of the İzmir, Turkey, was analysed under the projected inundation by the end of the century. In order to assess the degree of magnitude of such possible effects of SLR, various scenarios of sea level rise, being 1, 2, 3, 4 and 5 meters, were tested and inundation risk maps of Izmir were produced for each scenario. The focus was on the settlement patterns, population, agricultural land and road transport network. In order to aid to reproduce the analyses for various coastal zones, open source-data was preferred. According to the applied Geographic Information System (GIS)-based methodology, several assets could be under risk at the İzmir Bay. For the worst-case scenario almost 35% of the population at the coastal zone were under the risk of flooding, where 24,49% of the artificial surfaces were inundated together with 16,54% of agricultural areas and 0,24% of forests. According to the scenario results, inundation of motorways in the area cost approximately 143 million . The framework and quantitative assessment methodologies outlined in this paper could be employed to make an inventory of the assets in the vulnerable zones, where results could contribute to enhance to prioritize further mitigation and adaptation activities.
Keywords: Global warming, sea level rise, geographical information science
Potential Impact of Global Warming on Whiting in a Semi-Enclosed Gulf
by A Shanableh, M Imteaz, K Hamad, M Omar, T Merabtene, M siddique
Abstract: In this article, the potential impact of the rising atmospheric CO2 level on whiting in the semi-enclosed Arabian Gulf is considered. Chemical equilibrium models were developed to assess the spatial and temporal distributions of aragonite and calcite saturation indices due to acidification resulting from increasing atmospheric CO2 level. The models accounted for the spatial and temporal distributions of salinity and temperature in the surface water of the Gulf, which vary in the range of 3643 psu and 15oC to 32oC. The spatial variations of CaCO3 saturation revealed that the southern part of the Gulf along the coastlines of the UAE, Qatar and Bahrain experiences the highest CaCO3 saturation levels and corresponds to the observed whiting phenomenon. Potential acidification and erosion of the whiting phenomenon in the Gulf threaten the ecosystem, which deserves significant additional attention from the scientific community and decision makers in the region.
Keywords: whiting phenomenon; aragonite saturation index; calcite saturation index; CaCO3 saturation; acidification of sea water; global warming; increasing atmospheric CO2; phytoplankton; cyanobacteria
Potential economic and environmental benefits from the interconnection of the Greek islands
by Eleni Zafeiratou, Catalina Spataru
Abstract: Greece consists of 58 non-interconnected islands, located mainly in the Aegean Sea. Electricity is supplied to this region by 32 Autonomous Power Systems (APS) using heavy fuel oil or diesel power generators. A number of interconnections between the islands and the national grid system have been scheduled for the upcoming years. In this paper, we analyze the economic and environmental benefits following the interconnections. It was concluded that Greece could save between 2015 and 2040, from 9.73 to 17.82 billion Euros, subject to fuel price costs and demand growth. These amounts are charged to the Greek power customers through a cross subsidization policy known as public service obligation. Additionally, avoided costs for APS upgrade, range between 2.63 and 1.80 billion Euros. Interconnectors will also reduce the carbon footprint in the area by 51.1%-65.5% compared to the scenario of preserving APS. This is attributed mainly to renewable energy development reaching proportions of 84.7%-119% of the total power demand by 2040.
Keywords: autonomous power systems, carbon emissions, Greek islands, interconnections, public service obligation, projections, renewable energy, wind energy, submarine cables, energy scenarios
Smart Hybrid Renewable Microgeneration System for Residential Applications
by Evgueniy Entchev
Abstract: Microgeneration systems generate power and heat at the point of use by utilizing a variety of conventional and renewable technologies. They demonstrate a comparable electric efficiency to the conventional power generation stations, good environmental performance and ability to serve as a source for both primary and back-up power. Assembled in microgrids or in virtual power plant they can serve multiple buildings and be active participants in load management efforts both on site and on the grid. rnThe study investigates the performance of a hybrid renewable ground source heat pump (GSHP)/Photovoltaic thermal (PVT) microgeneration system serving multiple residential and small office buildings in Ottawa (Canada) and Incheon (South Korea). The analysis shows that the hybrid system operational cost savings are strongly dependent on the current energy (natural gas and electricity) prices, buildings heating, cooling and electric loads and occupants behaviour patterns. The cost analysis results indicate that the extra capital investment incurred to the GSHP-PVT system is possible to be returned within its lifespan, especially with the current trend of continuous equipment and installation price reductions. rn
Keywords: Hybrid system, simulation, load sharing, photovoltaic thermal, ground source heat pump
Special Issue on: IJGW Climate Literacy and Innovations in Climate Change Education
Moving beyond scientific knowledge: Leveraging participation, relevance, and interconnectedness for climate education
by Lauren B. Allen, Kevin Crowley
Abstract: Climate change requires a massive global response: individuals, communities, regions, and nations all need to make substantial change to current habits and behaviours. Education is an important part of changing habit and behaviour, yet most contemporary climate change education focuses primarily on individuals knowledge about climate science, which research suggests has limited utility in supporting collective response to climate change. This article proposes a new focus on educational intervention that is sensitive to the shared need for rapid, collective impact. Drawing on socio-cultural learning theory and a review of research on climate change learning, we argue that interventions based on three core principlesparticipation, relevance, interconnectednessare more likely to result in people taking steps to respond to climate change than interventions based on knowledge acquisition alone.
Keywords: Climate education, climate change learning, limitations of climate knowledge acquisition, informal learning, participation for climate education, relevance for climate education, interconnectedness, collective efficacy, collective impact, socio-cultural learning, collective response to climate change
Categorizing Students Evaluations of Evidence and Explanations About Climate Change
by Doug Lombardi, Elliot Bickel, Carol Brandt, Colin Burg
Abstract: Just as scientists evaluate explanations of climate change, students should also engage in critically evaluative practices when studying global warming. The purpose of the present study was to investigate middle school students evaluations when they examined different explanations for the causes of climate change. We observed four distinct categories of evaluation in student explanations about how evidence texts related to climate change models: (a) erroneous evaluation, (b) descriptive evaluation, (c) relational evaluation, and (d) critical evaluation. These findings allow us to better understand and recognize types of student thinking, so that we may be able to better implement instruction that promotes critical evaluation about climate change and other complex scientific topics, as is called for by recent science education reform efforts.
Keywords: climate change, science education, evaluation skills, critical thinking