Effect of gas flow-field design in the bipolar/end plates on the steady and transient state performance of polymer electrolyte membrane fuel cells
Effect of gas flow-field design in the bipolar/end plates on the steady and transient state performance of polymer electrolyte membrane fuel cells
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DOI：
10.1016/j.jpowsour.2005.05.006
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发表时间：
2006-04
影响因子：
9.2
通讯作者：
Atul Kumar;R. Reddy
中科院分区：
文献类型：
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作者：
Atul Kumar;R. Reddy
研究了双极板/端板气体流场设计对聚合物电解质膜燃料电池（PEMFC）稳态和瞬态性能的影响。采用不同的流场设计进行模拟，即（1）蛇形;（2）平行;（3）多平行;和（4）不连续。在5000 Am − 2的固定电流密度下，不连续设计的稳态电压最高。为了研究瞬态响应，平均电流密度从5000 Am − 2突然增加到8000 Am −2。可以看出，当负载水平增加时，电压水平突然下降，然后随着时间的推移趋于平稳，达到略高于下降值的值。蛇形流场、平行流场、多平行流场和不连续流场的时间分别为9.5、7.5、8.0和16.5s。虽然可以看出，不连续型设计的稳态性能是最大的，但其瞬态响应较慢。另一方面，在并联型设计的情况下，稳态性能低，但瞬态响应高。多并联设计提供了这两种特性的独特优势，即高稳态性能和良好的瞬态响应，因此应该比本研究中选择的其他设计表现更好。
In this work the effect of gas flow-field design in the bipolar/end plates on the steady and transient state performance of the polymer electrolyte membrane fuel cell (PEMFC) is presented. Simulations were performed with different flow-field designs, viz. (1) serpentine; (2) parallel; (3) multi-parallel; and (4) discontinuous. The steady-state voltage at fixed current density of 5000Am−2was highest for discontinuous design. For studying the transient response, the average current density was increased suddenly from 5000 to 8000Am−2. It was seen that when the load level was increased, the voltage level suddenly dropped and then with time leveled off to a value slightly higher than the dropped value. This time for serpentine, parallel, multi-parallel and discontinuous flow-fields were 9.5, 7.5, 8.0 and 16.5s, respectively. While it was seen that the steady-state performance of the discontinuous type of design was the maximum, its transient response was slow. On the other hand in case of parallel type of design the steady-state performance was low, but the transient response was high. The multi-parallel design offers a unique advantage of both of these properties, viz. high steady-state performance with good transient response, and therefore should perform better than the other designs chosen in this study.