In situ investigation of water transport in an operating PEM fuel cell using neutron radiography: Part 2 - Transient water accumulation in an interdigitated cathode flow field

被引：160
作者：
Owejan, J. P.
Trabold, T. A.
Jacobson, D. L.
Baker, D. R.
Hussey, D. S.
Arif, M.
机构：
[1] Gen Motors Fuel Cell Act, Honeoye Falls, NY 14472 USA
[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2006年 / 49卷 / 25-26期
关键词：
fuel cell; interdigitated; neutron radiography; visualization; water management;
D O I：
10.1016/j.ijheatmasstransfer.2006.07.004
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An interdigitated cathode flow field has been tested in situ with neutron radiography to measure the water transport through the porous gas diffusion layer in a PEM fuel cell. Constant current density to open circuit cycles were tested and the resulting liquid water accumulation and dissipation rates with in-plane water distributions are correlated to measured pressure differential between inlet and outlet gas streams. The effect of varying the reactant gas relative humidity on liquid water accumulation is also demonstrated. These results provide evidence that the reactant gas establishes a consistent in-plane transport path through the diffusion layer, leaving stagnant regions where liquid water accumulates. A simplified permeability model is presented and used to correlate the relative permeability to varying gas diffusion layer liquid water saturation levels. (c) 2006 Elsevier Ltd. All rights reserved.
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收藏
页码：4721 / 4731
页数：11
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