Numerical analysis of effects of flow channel size on reactant transport in a proton exchange membrane fuel cell stack

Chin-Hsiang Cheng, Hung Hsiang Lin

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

Numerical simulation of transport phenomena in a six-cell PEM fuel cell stack is performed to adjust the gas channel size of individual cells to obtain evenly distributed cell voltages. Commercial software, CFD-ACE+, is used as the solution code, and the effects of various combinations of geometric parameters of the channels are investigated, including the channel width ratios (Λ) and the heights of the gas channels (h). Furthermore, a six-cell fuel cell stack was assembled for experiments, and the polarization curves of the stack were measured. With the help of the experimental data, the values of the physical and electrochemical parameters adopted in the computation model are determined, and the computation model is then used in numerical simulation. Under the assumption of no dry out in the cells, an even voltage distribution can be obtained if the distribution of reactant gas is uniform among the cells. In this study, better combinations of the channel width ratios and the heights of gas channels for individual cells are proposed to yield a uniform distribution of the reactant gases in the cells. An adjustment of the geometric parameters of gas channels that leads to evenly distributed voltages is attempted, and a 16.5% increase in the performance of the fuel cell stack is observed simply by adjusting the sizes of the gas channels.

原文English
頁(從 - 到)349-359
頁數11
期刊Journal of Power Sources
194
發行號1
DOIs
出版狀態Published - 2009 十月 20

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 能源工程與電力技術
  • 物理與理論化學
  • 電氣與電子工程

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