Numerical modeling of manifold design and flow uniformity analysis of an external manifold solid oxide fuel cell stack |
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| Affiliation: | 1. School of Naval Architecture & Ocean Engineering, Huazhong University of Science & Technology, 430074, Wuhan, Hubei, China;2. School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science & Technology, 430074, Wuhan, Hubei, China;1. School of Energy and Power, Jiangsu University of Science and Technology, 212003 Zhenjiang, China;2. School of Mechanic Engineering, Jiangsu University, 212013 Zhenjiang, China;1. Hefei National Laboratory for Physical Sciences at Microscales & CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei 230026, China;2. Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-10691 Stockholm, Sweden;1. School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;2. Department of Chemical Engineering, Curtin University, WA 6845, Australia;3. Nanqiao Middle School, Jinjiang 362241, China;4. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China;1. Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan;2. Renewable Energy R&D Center, Chung-Hsin Electric & Machinery MFG. Corp., Taoyuan, Taiwan;3. Department of Energy Engineering, National United University, Miaoli, Taiwan;4. Green Energy Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan;1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, PR China;2. Shanghai Zhizhen New Energy Equipment Co., Ltd., Shanghai 201306, PR China |
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| Abstract: | Computational fluid dynamics (CFD) technique and experimental measurement are combined to investigate the effects of several geometric parameters on flow uniformity and pressure distribution in an external manifold solid oxide fuel cell (SOFC) stack. The model of numerical simulation is composed of channels, tubes and manifolds based on a realistic 20-cell stack. Analysis results show that gas resistance in the channel can improve the flow uniformity. However, channel resistance only has a limited effect under high mass flow rate. With the increase of inlet tube diameter, the flow uniformity improves gradually but this has little impact on pressure drop. On contrary, the larger diameter of outlet tube reduces the pressure drop effectively with minor improvement on flow uniformity. The dimensions of the flared inlet tube and the round perforated sheet in the manifold are designed to optimize both flow uniformity and pressure drop. Practical experimental stack is established and the velocity in the outlet of the channel is measured. The trends of the experimental measurements are corresponding well with the numerical results. The investigation emphasizes the importance of geometric parameters to gas flow and provides optimized strategies for external manifold SOFC stack. |
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| Keywords: | External manifold SOFC stack Flow uniformity Manifold design Numerical simulation Geometric optimization |
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