Two-dimensional simulation of water transport in polymer electrolyte fuel cells
Two-dimensional simulation of water transport in polymer electrolyte fuel cells
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DOI：
10.1016/s0009-2509(00)00066-x
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发表时间：
2000-10
影响因子：
4.7
通讯作者：
I. Hsing;P. Futerko
中科院分区：
文献类型：
--
作者：
I. Hsing;P. Futerko
导出了基于二维有限元的耦合流体流动、质量传递和电化学模型，用于在没有对反应气体进行外部加湿的情况下运行的聚合物电解质燃料电池。使用连续性、势流和 Stefan-Maxwell 方程对气体通道和气体扩散电极中的传输进行建模。浓溶液理论用于模拟膜内的传输。将离开燃料电池阳极侧的产物水分数的预测与文献中最近的实验研究进行比较。本模型正确预测了离开阳极的产物水对氢化学计量、氧化学计量、电流密度和电池温度的依赖性。讨论了这种燃料电池内传输的多维性质，并给出了流线图、气体摩尔分数和膜的水含量。
A two-dimensional finite-element-based model of coupled fluid flow, mass transport, and electrochemistry is derived for a polymer electrolyte fuel cell operating without external humidification of the reactant gases. Transport in the gas channels and gas-diffusion electrodes is modeled using the continuity, potential flow, and Stefan–Maxwell equations. Concentrated solution theory is used to model transport within the membrane. Predictions of the fraction of product water leaving the anode side of the fuel cell are compared to recent experimental studies in the literature. The present model correctly predicts the dependence of product water leaving the anode on hydrogen stoichiometry, oxygen stoichiometry, current density, and cell temperature. The multidimensional nature of transport within such a fuel cell is discussed and plots of streamlines, gas mole fractions, and water content of the membrane are presented.