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首页> 外文会议>11th fuel cell science, engineering, and technology conference 2013 >Optimization of PEM fuel cell flow channels-modeling analysis and experimental tests
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Optimization of PEM fuel cell flow channels-modeling analysis and experimental tests

机译：PEM燃料电池流道的优化-建模分析和实验测试

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摘要

The dimensions of gas flow channels and walls/ribs of PEM fuel cells are optimized using a convenient mathematical model. Experimental work for several PEM fuel cells with modeling-optimized gas flow channels was conducted, and the tested results validate the modeling work and the optimization. The model considered average mass transfer and species' concentrations in flow channels, which allows the determination of an average concentration polarization, the humidity in anode and cathode gas channels, and thus the proton conductivity of membranes, as well as the activation polarization. An electrical circuit for the current and ion conduction is applied to analyze the ohmic losses from anode current collector to cathode current collector. The modeling computation required relatively less computational time and thus can be applied to compute a large number of cases with various flow channel designs and operating parameters for optimization analysis. Optimum ratio of the width of flow channels against the walls/ribs was found from the modeling analysis. In the experimental work, PEM fuel cells were fabricated based on the flow channel dimensions optimized from the modeling analysis. Experimental results agreed with the modeling analysis satisfactorily in respect to the comparison of Ⅴ-Ⅰ performance between fuel cells with several optimized designs. The model is recommended as a tool for optimization design of gas flow channels for PEM fuel cells. The optimization results are of significance to the improvement of PEM fuel cell designs and performance.
机译：使用方便的数学模型优化PEM燃料电池的气体通道和壁/肋的尺寸。进行了几种具有建模优化气流通道的PEM燃料电池的实验工作，测试结果验证了建模工作和优化。该模型考虑了平均质量传递和流道中物质的浓度，从而可以确定平均浓度极化，阳极和阴极气体通道中的湿度，从而确定膜的质子电导率以及活化极化。施加用于电流和离子传导的电路以分析从阳极集电器到阴极集电器的欧姆损耗。建模计算需要相对较少的计算时间，因此可以用于计算具有各种流道设计和操作参数的大量情况，以进行优化分析。从建模分析中找到了流道宽度相对于壁/肋的最佳比例。在实验工作中，基于通过建模分析优化的流道尺寸来制造PEM燃料电池。对于几种优化设计的燃料电池之间的Ⅴ-Ⅰ性能比较，实验结果与建模分析令人满意。推荐将该模型用作优化设计PEM燃料电池气流通道的工具。优化结果对改善PEM燃料电池的设计和性能具有重要意义。

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  • 会议地点 Minneapolis MN(US)
  • 作者

    Hong Liu; Peiwen Li;

  • 作者单位

    Department of Aerospace and Mechanical Engineering The University of Arizona Tucson, AZ 85721, USA;

    Department of Aerospace and Mechanical Engineering The University of Arizona Tucson, AZ 85721, USA;

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  • 正文语种 eng
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