Modeling two-phase behavior in PEFCs

被引：256

作者：

Weber, AZ ^{[1
]}

Darling, RM

Newman, J

机构：

[1] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

[2] UTC Fuel Cells, S Windsor, CT 06074 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2004年 / 151卷 / 10期

关键词：

D O I：

10.1149/1.1792891

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A model is developed to examine quantitatively the effects of flooding on the operation of polymer-electrolyte fuel cells (PEFCs). Specifically, the change in the maximum power as a function of the structural properties of the diffusion media, including the bulk porosity, wettability, thickness, and pore-size distribution, is described. The porous-medium model developed includes analytic expressions and a modeling methodology for handling both liquid and gas flow. The model is used in combination with our previous membrane model to simulate transport in typical gas diffusion layers and examine the effect of layer hydrophobicity on the maximum power. (C) 2004 The Electrochemical Society.

引用

页码：A1715 / A1727

页数：13

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