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Author(s) :

Wu Shengwei, Wu Shengwei, Fu Lirong, Liu Jinyi, Gong Penghua, Zhang Xiaosong, Liu Weifeng.

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Abstract :

Abstract: A new flow channel with an extended area is proposed in this paper. The length of the extended area is 1, 2, and 4 mm, respectively. A three-dimensional isothermal steady-state model is established by COMSOL software. The results demonstrate that the performance of PEMFC with the novel flow channel is superior to that with the traditional straight channel. And the optimal extended length is 2 mm. At high current density, the extended channel can contribute to more uniform oxygen distribution and improve the removal of water. Increasing the number of extended areas after determining the optimal extended length will enhance fuel cell performance even more. The channel with double extended regions can increase the peak power density of PEMFC by 18.44% when compared to the traditional straight channel. Key words: hydrogen energy, PEMFC, optimal design, numerical simulation, extend flow channel 摘要： 该文提出一种带有拓展区域的新型PEMFC流道,拓展区域长度分别设计为1、2和4 mm。采用COMSOL软件建立三维等温稳态模型并进行数值计算。结果表明：新型拓展流道PEMFC性能均优于传统直流道PEMFC,其最佳拓展长度为2 mm。在高电流密度下,拓展流道使氧气分布更加均匀,提升水的去除能力。当取最佳拓展长度时,增加拓展区域数量能进一步提升燃料电池性能,与传统直流道相比,双拓展区域的流道使PEMFC峰值功率密度提高了18.44%。 关键词: 氢能, 质子交换膜燃料电池, 优化设计, 数值模拟, 拓展流道

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