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Basic evaluation of separator type specific phenomena of polymer electrolyte membrane fuel cell by the measurement of water condensation characteristics and current density distribution

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Title: Basic evaluation of separator type specific phenomena of polymer electrolyte membrane fuel cell by the measurement of water condensation characteristics and current density distribution
Authors: Tabe, Yutaka Browse this author →KAKEN DB
Kikuta, Kazushige Browse this author
Chikahisa, Takemi Browse this author →KAKEN DB
Kozakai, Masaya Browse this author
Keywords: PEM fuel cell
Water condensation
Current density
Separator type
Gas diffusion layer
Shortcut flow
Issue Date: 5-Sep-2009
Publisher: Elsevier B.V.
Journal Title: Journal of Power Sources
Volume: 193
Issue: 2
Start Page: 416
End Page: 424
Publisher DOI: 10.1016/j.jpowsour.2009.03.062
Abstract: This paper investigates phenomena related to water condensation behavior inside a polymer electrolyte membrane fuel cell (PEMFC), and analyzes the effects of liquid water and gas flow on the performance of the fuel cell. A method for simultaneous measurements of the local current density across the reaction area and direct observation of the phenomena in the cell are developed. Experimental results comparing separator types indicate the effect of shortcut flow in the gas diffusion layer (GDL) under the land areas of serpentine separators, and also show the potential of straight channel separators to achieve a relatively-uniform current density distribution. To evaluate shortcut flows under the land areas of serpentine separators, a simple circuit model of the gas flow is presented. The analysis shows that slight variations in oxygen concentration caused by the shortcut flows under the land areas affect the local and overall current density distributions. It is also shown that the establishment of gas paths under the water in channels filled with condensed water is effective for stable operation at low flow rates of air in the straight channels.
Type: article (author version)
URI: http://hdl.handle.net/2115/45174
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田部 豊

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