Thermodynamic modeling of an integrated biomass gasification and solid oxide fuel cell system |
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| Affiliation: | 1. College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China;2. North Japan Research Institute for Sustainable Energy, Hirosaki University, Aomori 030-0813, Japan;3. School of Electric and Electronic Information Engineering, Jilin Jianzhu University, Changchun 130118, China;1. School of Automotive and Transportation, Tianjin University of Technology and Education, Tianjin 300222, China;2. State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;1. School of Architecture, Southeast University, Nanjing 210096, PR China;2. Key Laboratory of Urban and Architectural Heritage Conservation (Southeast University), Ministry of Education, PR China;3. College of Engineering and Applied Science, University of Colorado Denver, Denver, CO 80217, USA;4. International Institute for Urban Systems Engineering, Southeast University, Nanjing 210096, PR China;5. National & Local United Engineering Research Center of “Basalt Fiber Production and Application”, Southeast University, Nanjing 210096, PR China;6. East China Electric Power Design Institute (ECEPDI), Shanghai 200063, PR China;1. Istanbul Technical University, Faculty of Civil Engineering, Department of Hydraulics, Maslak 34469, Istanbul, Turkey;2. Yildiz Technical University, Faculty of Civil Engineering, Department of Hydraulics, Davutpasa 34220, Istanbul, Turkey;3. Turkish Water Foundation, Aksaray 34134, Istanbul, Turkey |
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| Abstract: | An integrated process of biomass gasification and solid oxide fuel cells (SOFC) is investigated using energy and exergy analyses. The performance of the system is assessed by calculating several parameters such as electrical efficiency, combined heat and power efficiency, power to heat ratio, exergy destruction ratio, and exergy efficiency. A performance comparison of power systems for different gasification agents is given by thermodynamic analysis. Exergy analysis is applied to investigate exergy destruction in components in the power systems. When using oxygen-enriched air as gasification agent, the gasifier reactor causes the greatest exergy destruction. About 29% of the chemical energy of the biomass is converted into net electric power, while about 17% of it is used to for producing hot water for district heating purposes. The total exergy efficiency of combined heat and power is 29%. For the case in which steam as the gasification agent, the highest exergy destruction lies in the air preheater due to the great temperature difference between the hot and cold side. The net electrical efficiency is about 40%. The exergy combined heat and power efficiency is above 36%, which is higher than that when air or oxygen-enriched air as gasification agent. |
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| Keywords: | Biomass gasification Solid oxide fuel cell Thermodynamic model Exergy analysis |
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