Visualization of liquid water transport in a PEFC

被引：396
|
作者：
Yang, XG [1 ]
Zhang, FY
Lubawy, AL
Wang, CY
机构：
[1] Penn State Univ, Electrochem Engine Ctr, University Pk, PA 16802 USA
[2] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA
来源：
ELECTROCHEMICAL AND SOLID STATE LETTERS | 2004年 / 7卷 / 11期
关键词：
D O I：
10.1149/1.1803051
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Using an optical H-2/air polymer electrolyte fuel cell (PEFC), the mechanics of liquid water transport, starting from droplet emergence on the gas diffusion layer (GDL) surface, droplet growth and departure, to the two-phase flow in gas channels, is characterized under automotive conditions of 0.82 A/cm(2), 70 degrees C, and 2 atm. It is observed that water droplets emerge from the GDL surface under oversaturation of water vapor in the gas phase, appear only at preferential locations, and can grow to a size comparable to the channel dimension under the influence of surface adhesion. Liquid film formation on more hydrophilic channel walls and channel clogging are also revealed and analyzed. (C) 2004 The Electrochemical Society.
引用
收藏
页码：A408 / A411
页数：4
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