Numerical studies on rib & channel dimension of flow-field on PEMFC performance

被引:257
作者
Shimpalee, S. [1 ]
Van Zee, J. W. [1 ]
机构
[1] Univ S Carolina, Dept Chem Engn, NSF IUCRC Fuel Cells, Columbia, SC 29208 USA
基金
美国国家科学基金会;
关键词
PEM; fuel cells; flow-field design; fuel cell simulation; ES-PEMFC;
D O I
10.1016/j.ijhydene.2006.11.032
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
Distributions in reactant species concentration in a PEMFC cause distributions in local current density, temperature and water over the area of a PEMFC. These can lead to effects such as flooding or drying of the membrane and cause stresses in different regions of the fuel cell. Changing flow-field configuration, including channel path length, width, or height to distribute the gas more evenly, is one method of minimizing these stresses. This work numerically investigated how serpentine flow-fields with different channel/rib's cross section areas affect performance and species distributions for both automotive and stationary conditions. Further, the influence of flow direction to performance and its distribution was also reported. The prediction revealed that for stationary condition, narrower channel with wider rib spacing gives higher performance but opposite results when automotive condition is applied. (c) 2006 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:842 / 856
页数:15
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