Three-dimensional simulation of solid oxide fuel cell with metal foam as cathode flow distributor |
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| Affiliation: | 1. State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin, 300350, China;2. Building Energy Research Group, Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;1. State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin, China;2. Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) & Research Institute for Smart Energy (RISE), Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;3. Internal Combustion Engine Research Institute, Tianjin University, 92 Weijin Road, Tianjin, China;4. Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China;1. Building Energy Research Group, Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;2. School of Artificial Intelligence and Automation, Key Laboratory of Image Processing and Intelligent Control of Education Ministry, Huazhong University of Science and Technology, Wuhan, Hubei, China;3. HKUST Energy Institute, Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong;1. Fuel Cell and Battery Division, CSIR – Central Glass and Ceramic Research Institute, Kolkata, India;2. Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India |
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| Abstract: | In this study, the use of metal foam as a flow distributor at cathode is evaluated numerically by a comprehensive three-dimensional solid oxide fuel cell (SOFC) model. The results show that the adoption of metal foam improves the power density by 13.74% at current density of 5000 A m?2 in comparison with conventional straight channel design. It is found that electronic overpotential, oxygen concentration and reaction rates distribute more uniformly without the restriction of ribs. The effects of cathode thickness on the two different flow distributors are compared. Compared with conventional straight channel, the metal foam is found to be more suitable as a distributor for anode supported SOFC with thin cathode gas diffusion layer. Moreover, when metal foam is applied to the fuel cell with a larger reaction area, a more uniform velocity distribution and a lower temperature distribution can be achieved. It is also found that an appropriate permeability coefficient should offer a reasonable pressure drop, which is beneficial for the fuel cell system performance improvement. |
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| Keywords: | Solid oxide fuel cell Metal foam Three-dimensional model Flow distributor |
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