Temperature distribution on the MEA surface of a PEMFC with serpentine channel flow bed |
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| Affiliation: | 1. School of Mechanical Engineering, Iran University of Science and Technology, Tehran 16846-13114, Iran;2. Applied Multi-Phase Fluid Dynamics Laboratory, School of Mechanical Engineering, Iran University of Science and Technology, Iran;1. State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin, 300350, China;2. Zhengzhou Yutong Bus CO., LTD, Yutong Industry Park, Zhengzhou, 450016, China;1. Department of Mechanical and Aerospace Engineering, 2132 Bainer Hall, University of California – Davis, One Shields Avenue, Davis, CA 95616, USA;2. Department of Mechanical Engineering, Western New England University, 1215 Wilbraham Road, Springfield, MA 01119, USA;1. Dept. of Chemistry, Faculty of Mathematics and Sciences, Sriwijaya University, Inderalaya, Indonesia;2. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor DE, Malaysia;3. Dept. of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor DE, Malaysia |
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| Abstract: | Knowledge of the temperature distribution on the membrane electrode assembly (MEA) surface and heat transfer processes inside a proton exchange membrane fuel cell (PEMFC) is helpful to improvement of cell reliability, durability and performance. The temperature fields on the surface of MEA fixed inside a proton exchange membrane fuel cell with a serpentine channel flow bed were measured by infrared imaging technology under non-humidification conditions. The temperature distributions over the MEA surface under whole channel region were achieved. The experimental results show that the downstream temperatures are higher than the upstream. The hot region on the MEA surface is easy to locate from the infrared temperature image. The mean temperature on the MEA surface and the cell temperature both increase with the current density. Higher current density makes the non-uniformity of temperature distribution on the MEA surface worse. The loading time significantly affects the temperature distribution. Compared with the electrical performance of the cell, the MEA's temperatures need much more time to reach stable. The results indicate that isothermal assumption is not appropriate for a modeling of PEMFCs, and monitoring the temperature of external surface of the flow field plate or end plate cannot supply accurate reference to control the temperatures on MEA surface. |
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