Simulation on water transportation in gas diffusion layer of a PEM fuel cell: Influence of non-uniform PTFE distribution |
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| Affiliation: | 1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi''an, 710072, China;2. Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, China;3. Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hong Kong SAR, China;1. School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, 510641, China;2. Guangdong Key Laboratory of Automotive Engineering, Guangzhou, 510641, China;1. State Key Laboratory of Engines, Tianjin University, 135 Yaguan Rd, Tianjin 300350, China;2. Shanghai Hydrogen Propulsion Technology Co., Ltd, 1788 Xiechun Rd, Shanghai 201804, China;3. MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi''an Jiaotong University, 28 Xianning West Road, Xi''an, Shanxi 710049, China;4. Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;1. School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi 710049, China;2. Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi 710049, China |
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| Abstract: | Proton exchange membrane fuel cells (PEMFCs) are promising clean power sources with high energy conversion efficiency, fast startup, and no pollutant emission. The generated water in the cathode can cause water flooding of the catalyst layer (CL), which in turn can significantly decrease the fuel cell performance. To address this significant issue of PEMFC, a new gas diffusion layer (GDL) with non-uniform distribution of PTFE is proposed for water removal from the CL. The feasibility of this new GDL design is numerically evaluated by a Lattice-Boltzmann Method (LBM)-based two-phase flow model. The porous structure of the new GDL design is numerically reconstructed, followed by LBM simulations of the water transport in GDL. Three types of different wetting conditions are considered. It is found that liquid water transported 7.87% more with a single row of wetted solids and 13.36% more with two rows of wetted solids. The results clearly demonstrate that the liquid water can be effectively removed from the GDL by proper arrangement of hydrophilic solids in the GDL. |
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| Keywords: | Proton exchange membrane fuel cell Water transportation Two-phase flow Gas diffusion layer Lattice Boltzmann method |
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