PEMFC气体扩散层中水输运毛细管压力相关性的对比研究

Yujie Ding, Liangfei Xu, Yangbin Shao, Zunyan Hu, Jianqiu Li, Tong Shen, M. Ouyang
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引用次数: 0

摘要

本文将现有的气体扩散层毛细管压力相关性与三维PEMFC模型进行了数值比较。计算了相同条件下不同pc-s相关性下的电池性能和液态水分布。结果表明,这些相关性的适用性并不一致。高阶多项式能较好地预测极化曲线。指数相关性倾向于高估毛细管压力和液态水饱和度。因此,氧浓度的均匀性和燃料电池的性能都被低估了。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A comparative study on capillary pressure correlations of water transport in PEMFC gas diffusion layer
This paper numerically compares the existing capillary pressure correlations of gas diffusion layer with a three-dimensional PEMFC model. The cell performance and liquid water distributions are calculated with different pc-s correlations under the same conditions. The results indicate that the applicability of these correlations are not consistent. Polynomials with higher orders predict the polarization curve better. Exponential correlations tends to overestimate the capillary pressure and liquid water saturation. Therefore, the uniformity of oxygen concentration and fuel cell performance are underestimated.
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