Liquid water transport in parallel serpentine channels with manifolds on cathode side of a PEM fuel cell stack
Liquid water transport in parallel serpentine channels with manifolds on cathode side of a PEM fuel cell stack
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DOI：
10.1016/j.jpowsour.2005.04.003
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发表时间：
2006-03
影响因子：
9.2
通讯作者：
K. Jiao;Biao Zhou;P. Quan
中科院分区：
文献类型：
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作者：
K. Jiao;Biao Zhou;P. Quan
质子交换膜(PEM)燃料电池堆中的水管理一直是商业化道路上的一个具有挑战性的问题。利用计算流体力学(CFD)商用软件FLUENT，对质子交换膜燃料电池电堆阴极侧平行蛇形通道内的气水两相流动进行了数值模拟。讨论了具有进、出口歧管的蛇形流道内不同的气水流动特性。结果表明，在不同的时间内，不同细胞内的水分分布和压降存在显著差异。观察到了蛇形流道的“集流分离效应”，进出流歧管内部水分分布引起的压降变化。通过对平行蛇形通道和歧管内部流态的研究，找出了这种平行蛇形通道存在的几个气体流动问题，并提出了有益的建议。
Water management in a proton exchange membrane (PEM) fuel cell stack has been a challenging issue on the road to commercialization. This paper presents a numerical investigation of air–water flow in parallel serpentine channels on cathode side of a PEM fuel cell stack by use of the commercial Computational Fluid Dynamics (CFD) software package FLUENT. Different air–water flow behaviours inside the serpentine flow channels with inlet and outlet manifolds were discussed. The results showed that there were significant variations of water distribution and pressure drop in different cells at different times. The “collecting-and-separating effect” due to the serpentine shape of the gas flow channels, the pressure drop change due to the water distribution inside the inlet and outlet manifolds were observed. Several gas flow problems of this type of parallel serpentine channels were identified and useful suggestions were given through investigating the flow patterns inside the channels and manifolds.