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Pore Network Modeling to Study the Effects of Common Assumptions in GDL Liquid Water Invasion Studies

机译:孔隙网络模型研究通用假设在GDL液体水入侵研究中的作用

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摘要

Topologically equivalent pore network modelling of polymer electrolyte membrane (PEM) fuel cell gas diffusion layer (GDL) materials was employed to simulate ex-situ liquid water invasion experiments commonly conducted to investigate multiphase transport in PEM fuel cells. Stochastic, three dimensional pore spaces are numerically reconstructed to mimic carbon fibre paper based GDL materials. A watershed based method was used for extracting pore networks from a range of sample sizes. Invasion percolation was employed to simulate liquid water originating at one surface of the material and percolating through to the opposite surface. Inlet reservoir areas were chosen to mimic those used in ex-situ experiments in literature. It was found that sample size has a strong overall effect on saturation levels and inlet conditions primarily affected saturation near the inlet.
机译:聚合物电解质膜(PEM)燃料电池气体扩散层(GDL)材料的拓扑等效孔网络建模用于模拟通常用于研究PEM燃料电池中多相传输的异位液态水入侵实验。随机重建三维三维孔隙空间,以模仿基于碳纤维纸的GDL材料。基于分水岭的方法用于从一系列样本量中提取孔隙网络。侵入渗透被用来模拟起源于材料的一个表面并渗透至相反表面的液态水。选择入口水库面积以模仿文献中用于异位实验的水库面积。发现样品量对饱和度水平有很强的总体影响,而进样口条件主要影响进样口附近的饱和度。

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  • 来源
  • 会议地点 San Diego CA(US)
  • 作者

    J. Hinebaugh; A. Bazylak;

  • 作者单位

    Microscale Energy Systems Transport Phenomena Laboratory Department of Mechanical and Industrial Engineering, University of Toronto Toronto, Ontario, Canada;

    Microscale Energy Systems Transport Phenomena Laboratory Department of Mechanical and Industrial Engineering, University of Toronto Toronto, Ontario, Canada;

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  • 正文语种 eng
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