Energetic and exergetic analysis of a biomass-fueled CCHP system integrated with proton exchange membrane fuel cell |
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| Affiliation: | 1. School of Energy Science and Engineering, Central South University, Changsha, 410083, China;2. Space Power Technology State Key Laboratory, Shanghai Institute of Space Power-Sources, Shanghai, 200245, China;1. GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China;2. GRINM Group Co., Ltd., National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy, Beijing 100088, China;3. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China;4. State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing, China;2. National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing, China;3. State Key Laboratory of Alternate Electric Power System with Renewable Energy Source, North China Electric Power University, Beijing, China;4. Key Laboratory of Power Station Energy Transfer Conversion and System (Ministry of Education), North China Electric Power University, Beijing, 102206, China;5. Department of Energy, Systems, Territory and Constructions Engineering, University of Pisa, Pisa, Italy;1. College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China;2. Institute of New Energy and Energy-saving & Emission-reduction Technology, Hunan University, Changsha, 410082, China |
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| Abstract: | As a high-efficiency and eco-friendly way of energy conversion, fuel cell has received much attention in recent years. A novel residential combined cooling, heating and power (CCHP) system, consisting of a biomass gasifier, a proton exchange membrane fuel cell (PEMFC) stack, an absorption chiller and auxiliary equipment, is proposed. Based on the established thermodynamic models, the effects of operating parameters, biomass materials type and moisture content on the system performance are closely investigated. Overall system performance is then compared under four different operating modes. From the viewpoints of energy utilization and CO2 emissions, the CCHP mode has the best performance with corresponding energy efficiency of 57.41% and CO2 emission index of 0.516 ton/MWh. Exergy analysis results suggest that the optimization and transformation on the gasifier and PEMFC stack should be encouraged. Energy and exergy assessments in this research provide pragmatic guidance to the performance improvement of the integrated CCHP systems with PEMFC. This research also achieves a reasonable combination of efficient cogeneration, green hydrogen production and full recovery of low grade waste heat. |
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| Keywords: | Proton exchange membrane fuel cell Biomass gasification Absorption chiller Combined cooling heating and power Energy analysis Exergy analysis |
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