Direct observation of the two-phase flow in the air channel of a proton exchange membrane fuel cell and of the effects of a clogging/unclogging sequence on the current density distribution

被引：16

作者：

Dillet, Jerome ^{[1
]}

Lottin, Olivier ^{[1
]}

Maranzana, Gael ^{[1
]}

Didierjean, Sophie ^{[1
]}

Conteau, Delphine ^{[1
,2
]}

Bonnet, Caroline ^{[2
]}

机构：

[1] Nancy Univ, LEMTA, CNRS, F-54500 Vandoeuvre Les Nancy, France

[2] Nancy Univ, LSGC, CNRS, F-54000 Nancy, France

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 09期

关键词：

PEM fuel cells; Instrumented cell; Water visualisation; Current density profile; Cathode channel flooding;

D O I：

10.1016/j.jpowsour.2009.10.103

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A small single-channel fuel cell prototype was built with the objective of monitoring the appearance and transport of water droplets in the gas channels in usual operating conditions. It allows the simultaneous observation of droplets and of their local effects on current density. The first results show that the air flow rate seems to control the transition between two different water removal mechanisms: a plug flow when the air stoichionnetry is low, with significant disturbances in the local current density, pressure drop and fuel cell performance, and a more conventional flow with steadier removal of smaller droplets when the stoichionnetry is higher. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2795 / 2799

页数：5

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