Global warming,environmental and sustainability aspects of a geothermal energy based biodigester integrated SOFC system |
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| Affiliation: | 1. Energy Institute, TUBITAK Marmara Research Center, P.O. Box 21, 41470, Gebze, Kocaeli, Turkey;2. Department of Mechanical Engineering, Engineering Faculty, Gebze Technical University, 41400 Gebze, Kocaeli, Turkey;3. Division of Hydromechanics and Hydraulic Machines, Mechanical Engineering Department, Faculty of Mechanical Engineering, Yildiz Technical University, 34349 Besiktas, Istanbul, Turkey;1. School of Mechatronic Engineering, Xi''an Technological University, Xi''an, 710021 China;2. Doctor of Research in Management Program, Bina Nusantara University, Jalan Hang Lekir I No. 6, Senayan, Jakarta, 10270, Indonesia;3. Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, P.O. Box 179, Ardabil, Iran;1. School of Mechatronic Engineering, Xi''an Technological University, Xi''an, 710021, China;2. Mechanical Engineering Department, University of Technology, Baghdad, Iraq;3. Department of Biomedical Engineering, University of Thi-Qar, 64001, Nassiriya, Iraq;4. Department of Mechanical Engineering, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia;5. Mechanical Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj, 16273, Saudi Arabia;6. Mechanical Engineering Department, Faculty of Engineering, Red Sea University Port Sudan, Sudan;7. Department of Mathematical and Computer Modelling, Al-Farabi Kazakh National University, 050040, Almaty, Kazakhstan;8. Department of Mathematics and Cybernetics, Kazakh British Technical University, 050000, Almaty, Kazakhstan;1. School of Mechatronic Engineering, Xi''an Technological University, Xi''an, 710021, China;2. Mechanical Engineering Department, University of Technology, Baghdad, Iraq;3. Department of Biomedical Engineering, University of Thi-Qar, 64001, Nassiriya, Iraq;4. Department of Mechanical Engineering, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia;5. Mechanical Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj, 16273, Saudi Arabia;6. Mechanical Engineering Department, Faculty of Engineering, Red Sea University Port Sudan, Sudan;7. Department of Mathematical and Computer Modelling, Al-Farabi Kazakh National University, 050040, Almaty, Kazakhstan;8. Department of Mathematics and Cybernetics, Kazakh British Technical University, 050000, Almaty, Kazakhstan;9. Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;1. School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran;2. Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran |
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| Abstract: | In this study, global warming, environmental and sustainability aspects of a geothermal energy based biodigester integrated SOFC system are parametrically analyzed. In this regard, a system is designed, consisting of three main subsystems such as Solid Oxide Fuel Cell, Anaerobic Digester, and a Heat Recovery Steam Generator. In order to investigate the global warming, environmental and sustainability aspects of the system, the energy and exergy analyses are performed, and the following indicators are taken into consideration, which are i) unit CO2 emission, ii) environmental effect factor, iii) waste exergy ratio, iv) exergy destruction ratio, v) exergy recovery ratio, vi) exergetic sustainability index. Accordingly, the maximum exergetic sustainability index and exergy efficiency of the integrated system are calculated to be 0.486 and 0.367, respectively, in case the SOFC inlet temperature is equal to 633.3 °C while electric current density is 5500 A/m2. On the other hand, the minimum exergy destruction ratio and the minimum environmental effect factor are obtained to be 0.74 and 2.33 while SOFC inlet temperature is 633.3 °C and SOFC current density is 8000 A/m2. The minimum unit CO2 emission of the whole system is determined to be 368.4 kg/MWh at 5500 A/m2 of SOFC current density and 727 °C of SOFC inlet temperature while determined as 258.3 kg/MWh at 8000 A/m2 of SOFC current density and 680 °C of SOFC inlet temperature. Thus, it can be said that such a system may be applied for reducing the CO2 based global warming effects and improving the environmental sustainability. |
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| Keywords: | Sustainability Environment Global warming Exergy SOFC Biogas production |
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