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The effects of water accumulation at the interface between gas diffusion layer and gas supplying channel on the water distribution in polymer electrolyte membrane fuel cells
Affiliation:1. Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea;2. Division of Advance Nuclear Engineering, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea;1. Dept. of Climate Change Energy Engineering, Yonsei University, Seoul, 03722, South Korea;2. Blue Economy Strategy Institute Co. Ltd., Focus Buld., 23-13, Hyoryeong-ro, 60-gil, Seocho-gu, Seoul, 06721, South Korea;3. Fuel Cell Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, South Korea;4. Mechanical Engineering Dept., Chung-Ang University, Seoul, 06974, South Korea;1. Babol Noshirvani University of Technology, Department of Mechanical Engineering, P.O. Box: 484, Babol, Iran;2. Amol University of Special Modern Technologies, Faculty of Engineering Technology, Amol, Iran;1. Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai 200240, PR China;2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, PR China;3. Shanghai Zhizhen New Energy Equipment Co., Ltd., Shanghai 201306, PR China;1. Department of Mechanical Engineering, POSTECH, Pohang, Republic of Korea;2. Division of Advanced Nuclear Engineering, POSTECH, Pohang, Republic of Korea;3. Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
Abstract:The effects of water accumulation at the interface of gas diffusion layer (GDL) and gas supplying channel on the water distribution in polymer electrolyte membrane fuel cells (PEMFCs) is analyzed. The amount of water at the interface and in the GDL are quantified using X-ray. Quantitative analyses show that the value of the criterion of water accumulation that can affect the water distribution is in the water saturation range of 0.22–0.24. The amount of water in the GDL increases with the water accumulated at the beginning of the water generation cycle. However, it remains constant after the water accumulation exceeds a criterion value. The result shows that the water accumulation at the interface should be investigated to understand the water distribution in PEMFC. The water distribution in PEMFC cannot be analyzed based on the steady state concept but can be analyzed based on the concept of cyclic process.
Keywords:Polymer electrolyte membrane fuel cell  Water distribution  Water accumulation  X-ray
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