Optimization of channel dimensions and gas diffusion layer thickness based on mass transfer characteristics of proton exchange membrane fuel cell

2020 4th CAA International Conference on Vehicular Control and Intelligence (CVCI) Pub Date : 2020-12-18 DOI:10.1109/CVCI51460.2020.9338549

Zhina Wang, Yujie Ding, Liangfei Xu, Zunyan Hu, Huize Liu, Jianqiu Li, Yishu Zhang, M. Ouyang

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Abstract

To improve the volume power density of proton exchange membrane fuel cell (PEMFC), a design of graphite bipolar plate straight channel characterized by narrow ribs is studied in this article. A three-dimensional multiphase model of PEMFC is employed to analyze the effects of the geometric parameters on the mass transfer characteristics and power density. The results show that smaller channel width and channel depth can enhance water removal and gas transport, which could increase the fuel cell performance. However, the influence of gas diffusion layer (GDL) thickness on fuel cell performance is not monotonous which means that there is an optimal value. The overall dimensions are optimized with volume power density as objective function. The best performance is obtained when the channel width, channel depth and GDL thickness are 0.1, 0.2 and 0.05 mm, respectively. Compared with the conventional channel design, the volume power density of optimal channel is significantly increased by 211.32% at 0.6 V.

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基于质子交换膜燃料电池传质特性的通道尺寸和气体扩散层厚度优化

为了提高质子交换膜燃料电池(PEMFC)的体积功率密度，研究了窄肋石墨双极板直通道的设计。采用三维多相模型分析了几何参数对PEMFC传质特性和功率密度的影响。结果表明，减小沟道宽度和沟道深度可以增强水的去除和气体的输运，从而提高燃料电池的性能。然而，气体扩散层(GDL)厚度对燃料电池性能的影响并非单一的，存在一个最优值。以体积功率密度为目标函数对整体尺寸进行优化。当通道宽度、通道深度和GDL厚度分别为0.1、0.2和0.05 mm时，性能最佳。与传统通道设计相比，优化后的通道在0.6 V时的体积功率密度显著提高了211.32%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 4th CAA International Conference on Vehicular Control and Intelligence (CVCI)

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