期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 168, 期 9, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/ac2656
关键词
Proton exchange membrane fuel cell; Flow field; Distribution zone; Pressure drop; Uniformity
资金
- National Key Research and Development Program of China [2017YFB0102702]
- National Key Development Project of New Energy Vehicle Test Program of China [2017YFB0102803]
- National Natural Science Foundation of China [21676207]
- Foshan Xianhu Laboratory Open-end Funds [XHD2020-002]
Two distribution zone designs, CRDZ and DMDZ, were investigated for their effects on gas distribution uniformity and pressure drop in a flow field plate of proton exchange membrane fuel cells. The study found that well-designed CRDZ can achieve more uniform gas distribution, while the uniformity of gas distribution in DMDZ depends on the combined effects of different factors.
A typical flow field plate of proton exchange membrane fuel cells has a distribution zone that connects the input ports and main channel region where major reactions take place. In this study, the effects of two distribution zone designs, i.e., the channel-ridge distribution zone (CRDZ) and dot matrix distribution zone (DMDZ), on the gas distribution uniformity and pressure drop are investigated numerically. For the flow fields with CRDZ, the theoretical mass flow rates and pressure distributions are found to agree with numerical results well. The flow rate distributions in the flow fields become more uniform when the turning angle increases to special angle. To design the flow fields with CRDZ, the channels can be arranged with simple geometry lines in the first step and then optimised with CFD considering the actual size to achieve a more uniform distribution and suitable pressure drop. For the flow fields with DMDZ, the uniformity of gas distribution depends on the shunt and dispersion effects of dot matrix, and the rectification and expansion effects of the distribution chamber. With an increase in porosity of DMDZ, the gas distribution gets better, and it is the most uniform when the distribution zone is an empty chamber.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据