International Journal of Sustainable Aviation (5 papers in press)
Sustainability reporting in airlines industry: Evidence from Turkey
by Seval Kardes Selimoglu, Arzu Ozsozgun Caliskan
Abstract: Airlines are crucial driver for economic and social development, connecting people, delivering products and transporting goods. Today there is a much clearer recognition of the need to consider aviations contribution to the three pillars of sustainability; economic, social and environment in a more integrated manner. Even sustainability reporting is popular subject in academic literature, sustainability reporting related researches are limited in the airlines. The main aim of this research paper is to address the status of sustainability reports in Turkish aviation industry by focusing airlines. In 2016, there are 13 airlines companies operating in Turkeys civil aviation industry in the field of passenger and cargo carriage. Data of the research collected through web sites visits of the companies, the GRI Disclosure Database, the Public Disclosure Database (KAP) in Turkey. The results show that sustainability reporting practices are not common in Turkeys aviation industry. Among the 13 airlines companies, only one airlines company has sustainability reports. In addition to that, there is one airport operation company and one ground handling company in the sector that publish sustainability reports.
Keywords: Sustainability; sustainability reporting; aviation; airlines; developing country; emerging economy.
Fault Tolerant Control of Attitude Dynamics of Nanosatellites
by Demet Cilden-Guler, Chingiz Hajiyev, Janset Dasdemir
Abstract: In this paper, fault-tolerant active control of the rotational motion of the satellite has been applied. Satellite mathematical models are introduced, and the non-traditional Kalman filter is designed with the presented control algorithms. Re-adjustment control procedure has been established taking into account the identified control distribution matrix. If there are three-axis reaction wheels on the satellite, the failure of one actuator, control setting is carried out using control distribution matrix diagnostics. Extended Kalman Filter has been introduced to control the distribution estimation of matrix elements, so check back adjustment rule is applied by the fault tolerant attitude control.
Keywords: fault tolerant control; attitude; nanosatellite; actuator fault.
Reflection of Sustainability Issues in Airline Strategies and Overview Of Life Cycle Cost Analysis
by Zeliha Akça
Abstract: This study reviews airline fuel efficiency strategies in response to industry sustainability trends based on reports of sector regulators, industry forecasters and airlines. Major strategies in order to achieve fuel efficiency are listed and fuel efficiency gains with new generation aircraft is expressed with historical trends and numbers. The strategy of replacing aging aircraft with younger and/or next generation aircraft provides the largest amount of fuel efficiency. Therefore, this strategy is discussed as a focus of this paper with the underlying motivations. Since aircraft are long-life assets and operating cost of aircraft can change significantly depending on the aircraft type and range of operation, evaluation of aircraft acquisition projects requires meticulous study of costs and benefits over the life span of the project. This study reminds life cycle cost methodology to economically evaluate these projects including complex scenarios. Accordingly, the paper briefly describes general idea behind the methodology and main steps of an application, and reviews literature on life cycle cost analysis indicating that the lack of papers focusing on life cycle cost analysis for replacement projects from the perspective of an airline.
Keywords: Sustainability; fuel efficiency; airline; life cycle cost analysis; replacement analysis.
Consumer Willingness to Pay for New Airports that Use Renewable Resources
by Nathan W. Walters, Stephen Rice, Scott R. Winter, Bradley S. Baugh, Nadine K. Ragbir, Emily C. Anania, John Capps, Mattie N. Milner
Abstract: Over the last few decades, awareness and concern for eco-friendly business practices have continued to grow and encompass industrial fields, such as aviation. The current study determines if people will be willing to pay more for the development of an eco-friendly (green) airport compared to a traditional one, and to see if affect mediates that relationship. The researchers conducted a three-study design using over 1,100 participants. The results indicate that participants were significantly more willing to pay for the airport development if it was perceived as a green airport. Affect was found to have a significant role in mediating the relationship between the type of airport and willingness to pay. Participants felt anger and disgust toward paying for a new airport that did not use renewable resources. Practical applications from the current study and topics for future research are presented.
Keywords: Sustainability; green airports; aviation; eco-friendly; willingness to pay; airport management; emotions; climate change; green marketing; regression.
DETERMINATION OF OPTIMUM INSULATION THICKNESS FOR BUILDINGS WALLS WITH RESPECT TO DIFFERENT INSULATION MATERIALS: A CASE STUDY INTERNATIONAL HASAN POLATKAN AIRPORT TERMINAL
by Mehmet Kadri Akyuz, Onder Altuntas, Mehmet Ziya Sogut, Tahir Hikmet Karakoc, Semra Kurama
Abstract: The systems in which energy is most intensely used in airport terminal buildings are HVAC systems. More efficient heating and cooling systems and the performance of the building envelope can provide significant reductions in energy consumption without compromising comfort conditions in terminal buildings. In this study, the exterior walls of the International Hasan Polatkan Airport were examined using a thermal camera, and it was observed that heat losses were due to the lack of thermal insulation. The optimum insulation thicknesses for different thermal insulation materials (EPS, XPS, glass wool and stone wool) were determined by the Life Cycle Cost (LCC) method. The effect of the application of the calculated insulation thicknesses on energy performance and the economic payback periods were determined. As a result, optimum insulation thicknesses have been found as 0.05m, 0.033m, 0.078m and 0.973m for EPS, XPS, glass wool and stone wool in respective order. It was observed from the results of analysis that the economic payback period changed between 4.85 and 7.7 years if optimum insulation thicknesses are applied.
Keywords: Optimum insulation thickness; LCC; energy; airport.