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

^*Corresponding author for this work

The Pennsylvania State University

Research output: Contribution to journal › Article › peer-review

441 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	A408-A411
Journal	Electrochemical and Solid-State Letters
Volume	7
Issue number	11
DOIs	https://doi.org/10.1149/1.1803051
Publication status	Published - 2004
Externally published	Yes

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title = "Visualization of liquid water transport in a PEFC",

abstract = "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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AU - Yang, X. G.

AU - Zhang, F. Y.

AU - Lubawy, A. L.

AU - Wang, C. Y.

PY - 2004

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

Abstract

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