Visualization of liquid water transport in a PEFC

X. G. Yang; F. Y. Zhang; A. L. Lubawy; C. Y. Wang

doi:10.1149/1.1803051

Visualization of liquid water transport in a PEFC

X. G. Yang^*, F. Y. Zhang, A. L. Lubawy, C. Y. Wang

^*此作品的通讯作者

The Pennsylvania State University

科研成果: 期刊稿件 › 文章 › 同行评审

441 引用（Scopus）

摘要

Using an optical H₂/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/cm², 70°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.

源语言	英语
页（从-至）	A408-A411
期刊	Electrochemical and Solid-State Letters
卷	7
期	11
DOI	https://doi.org/10.1149/1.1803051
出版状态	已出版 - 2004
已对外发布	是

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AU - Yang, X. G.

AU - Zhang, F. Y.

AU - Lubawy, A. L.

AU - Wang, C. Y.

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Y1 - 2004

N2 - Using an optical H2/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/cm2, 70°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.

AB - Using an optical H2/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/cm2, 70°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.

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Visualization of liquid water transport in a PEFC

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