The influence of flow direction variation on the performance of a single cell for an anode-substrate flat-panel solid oxide fuel cell |
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| Affiliation: | 1. Fluid System Engineering Department, KEPCO Engineering and Construction Company, Taejeon, 34057, Republic of Korea;2. Department of Safety Engineering, Incheon National University, Incheon, 22012, Republic of Korea;3. Fire Disaster Prevention Research Center, Incheon National University, Incheon 22012, Republic of Korea;4. Department of Mechanical Engineering, Hannam University, Taejeon, 34430, Republic of Korea;1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, 430070, China;2. School of Energy and Power Engineering, Wuhan University of Technology, Wuhan, 430063, China;3. School of Mechanical & Mining Engineering, The University of Queensland, QLD, 4072, Australia;1. College of Energy Engineering, Zhejiang University, Hangzhou, 310027, PR China;2. College of Mechanical Engineering, Guangxi University, Nanning, 530004, PR China;3. College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, 325035, PR China;1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, PR China;2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an, 710049, PR China |
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| Abstract: | This study was performed for a computational investigation of a single cell for an anode-substrate flat-panel solid oxide fuel cell (SOFC) to scrutinize the performance related to thermodynamic potential and overpotentials according to three other flow configurations: parallel flow, countercurrent flow, and perpendicular flow. To understand the performance differences based on the typical three flow configurations, the contour plots of temperature, species, and current density were simulated, and the trends and the portions of the diverse overpotentials were analyzed. The calculated results demonstrated that the parallel flow configuration had a tendency to deliver the highest performance and the lowest overpotentials of the three configurations because the temperature and H2 concentration in the parallel flow configuration were changed countercurrently along the anode flow direction. These overpotentials were complemented by interacting with the more uniform current density and the total impedance induced by the opposite directional change for the temperature and H2 concentration.In designing the anode-substrate flat-panel SOFC, the uniformity of flow rate in each channel, which affects significantly to both performance and lifetime of the cell, has been checked. From this numerical analysis result, the design performance of single cell was satisfactorily verified by obtaining negligible flow deviation in each channel of the designed separator deviation, which was less than 3% of the average velocity. |
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| Keywords: | Solid oxide fuel cell Computational investigation Flow configurations Overpotentials |
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