质子交换膜燃料电池
传质
喷嘴
流量(数学)
块(置换群论)
频道(广播)
能量(信号处理)
机械
材料科学
能量转移
传输(计算)
化学
分析化学(期刊)
膜
计算机科学
工程类
热力学
数学
电气工程
物理
色谱法
几何学
分子物理学
生物化学
统计
并行计算
作者
Pengcheng Dong,Gongnan Xie,Meng Ni
出处
期刊:Energy
[Elsevier]
日期:2020-06-27
卷期号:206: 117977-117977
被引量:76
标识
DOI:10.1016/j.energy.2020.117977
摘要
In order to improve the mass transfer and the energy performance of a Proton Exchange Membrane Fuel Cell (PEMFC), five different kind of block shapes in the flow channel are proposed and evaluated numerically. It is found that the use of blocks in the gas channel enhances the mass transfer due to the generation of a nozzle-type effect in the channel. Results shows that the performances of PEMFCs with the five blocked channels [Cases B–F] can be improved comparing with that of the conventional flow channel without block [Case A], and Case D performs the best. The electrochemical conversion efficiency and effective power are improved by 15.58% and 15.77%, respectively. Further, by observing the block heights (0.4, 0.5 and 0.6) and spatial intervals (2.5, 5.0 and 8.0) of the above optimal shape [Case D] on the energy performances, these improvements can be raised to 17.09% and 16.95%, respectively.
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