Novel closed anode pressure-swing system for proton exchange membrane fuel cells |
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| Affiliation: | 1. School of Automotive Engineering, The State Key Laboratory of Mechanical Transmissions, Chongqing Automotive Collaborative Innovation Centre, Chongqing University, Chongqing, 400044, PR China;2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, PR China;3. School of Mechanical Engineering, Chongqing University of Technology, Chongqing, 400054, PR China;4. Department of Mechanical Engineering, National University of Singapore, 5 Engineering Drive 2, Singapore, 117576;5. Clean Energy Research Center, Temasek Polytechnic, Singapore, 529757;6. Chongqing Changan New Energy Vehicle Technology Co.,Ltd, Chongqing, 400000, PR China;1. School of Automotive Engineering, The State Key Laboratory of Mechanical Transmissions, Chongqing Automotive Collaborative Innovation Centre, Chongqing University, Chongqing, 400044, China;2. Energy Research Institute @ Nanyang Technological University, 50 Nanyang Avenue, 637553, Singapore;3. Changan Automobile Company Limited, Jiangbei District, Chongqing, 400000, China;1. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. School of Automotive Engineering, State Key Laboratory of Mechanical Transmissions, Chongqing Automotive Collaborative Innovation Center, Chongqing University, Chongqing 400044, China;1. School of Automotive Engineering, The State Key Laboratory of Mechanical Transmissions, Chongqing Automotive Collaborative Innovation Centre, Chongqing University, Chongqing, 400044, China;2. Propulsion Research Institute of Chongqing Changan New Energy Vehicle Technology Co. Ltd, Chongqing, 400000, China;3. School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;4. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 637553, Singapore;5. School of Mechanical and Aerospace Engineering, Queen''s University Belfast, Belfast, BT9 5AH, United Kingdom;6. Civil, Structural, and Environmental Engineering, Trinity College Dublin, The University of Dublin, Ireland |
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| Abstract: | To overcome the low system efficiency and fuel efficiency in conventional recirculation systems and purging systems, a new anode closed pressure-swing system for proton exchange membrane fuel cells (PEMFCs) is proposed in this paper. Only two pressure regulators set at different pressures and a buffer tank are applied to produce pressure-swing inside the anode through the process of hydrogen feed and reaction, thereby achieving the anode-dead-end (ADE) operation (no purging). This system was successfully tested on a 20-cell open-cathode stack. The results indicate that the performance of the stack with the developed system is stable and efficient over 13,000 s, while its performance in ADE mode without purging deteriorates rapidly because of active area reduction. It can be concluded that the pressure swing system provides the following advantages: close to 100% hydrogen utilization; improved stack performance of around 12.5% for the power compare to the ADE mode with intermittent purging at 12 V load; improved humidification of the anode and membrane; and ease of implementation as there are no extra pumps. |
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| Keywords: | Anodic pressure swing PEMFC Buffer tank Purging Anodic flooding |
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