Determination of the optimal active area for proton exchange membrane fuel cells with parallel, interdigitated or serpentine designs
Determination of the optimal active area for proton exchange membrane fuel cells with parallel, interdigitated or serpentine designs
复制标题
确定具有平行、叉指或蛇形设计的质子交换膜燃料电池的最佳活性面积
DOI：
10.1016/j.ijhydene.2008.12.049
复制
发表时间：
2009-05
影响因子：
7.2
通讯作者：
Lee D J
中科院分区：
文献类型：
--
作者：
Zhang X X;Yan W M;Su A;Wang X D;Lee D J
采用三维两相PEM燃料电池模型，研究了活性区尺寸对PEM燃料电池稳态特性的影响，包括局部电流密度、局部氧传输速率和液态水传输. PEM燃料电池具有平行、交叉和蛇形流动通道设计。在高工作电压下，由于氧供应极限的出现，尺寸效应对电池性能的影响并不明显。在低电压下，电化学反应速率高，产生大量的水，其去除能力受到流道设计的显著影响。长平行流场的电池容易出现水积聚，从而表现出低的氧传输速率和低的电流密度。具有交叉和蛇形流场的电池产生强制对流流以改善反应物输送和液态水去除，从而导致增强的电池性能和与平行流动电池不同的尺寸效应。有效面积的增加显著提高了蛇形电池的性能，但对叉指型电池的性能影响有限。还讨论了压力降的尺寸效应。
Effects of active area size on steady-state characteristics of a working PEM fuel cell, including local current densities, local oxygen transport rates, and liquid water transport were studied by applying a three-dimensional, two-phase PEM fuel cell model. The PEM fuel cells were with parallel, interdigitated, and serpentine flow channel design. At high operating voltages, the size effects on cell performance are not noticeable owing to the occurrence of oxygen supply limit. The electrochemical reaction rates are high at low operating voltages, producing large quantity of water, whose removal capability is significantly affected by flow channel design. The cells with long parallel flow field experience easy water accumulation, thereby presenting low oxygen transport rate and low current density. The cells with interdigitated and serpentine flow fields generate forced convection stream to improve reactant transport and liquid water removal, thereby leading to enhanced cell performance and different size effect from the parallel flow cells. Increase in active area significantly improves performance for serpentine cells, but only has limited effect on that of interdigitated cells. Size effects of pressure drop over the PEM cells were also discussed.
登录
查看更多内容
影响因子：
2.9
作者：
A. West;T. Fuller
通讯作者：
A. West;T. Fuller
影响因子：
3.9
作者：
J. Yi;T. Nguyen
通讯作者：
J. Yi;T. Nguyen
影响因子：
4.7
作者：
I. Hsing;P. Futerko
通讯作者：
I. Hsing;P. Futerko
影响因子：
3.9
作者：
Chao Xu;Ya-Ling He;T. Zhao;Rong Chen;Q. Ye
通讯作者：
Chao Xu;Ya-Ling He;T. Zhao;Rong Chen;Q. Ye
影响因子：
9.2
作者：
Hubertus P.L.H. van Bussel;F. Koene;R. Mallant
通讯作者：
Hubertus P.L.H. van Bussel;F. Koene;R. Mallant