文献类型：期刊文献

英文题名：New insight into impacts of hierarchical flow distribution on performance of proton exchange membrane fuel cells

作者：Wang, Bin[1];Pan, Weitong[1,2];Hu, Zichao[1];Zhang, Guoyu[1];Tang, Longfei[1];Chen, Xueli[1];Wang, Fuchen[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Resource Utilizat Carbon Containing W, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Div Proc Equipment Sci & Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：652

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20252418582841);WOS:【SCI-EXPANDED(收录号:WOS:001517300800005)】；

基金：The research is supported by Shanghai YangFan Program (24YF2709200) and Fundamental Research Funds for the Central Uni-versity (JKCB1241102) .

语种：英文

外文关键词：Proton exchange membrane fuel cell; Momentum and mass transfer; Hierarchical flow distribution; Self-uniform flow distribution; Compensatory flow

摘要：Hierarchical flow distribution plays a crucial role in influencing the performance of Proton Exchange Membrane (PEM) fuel cells, a factor that has been overlooked in previous studies. In this work, a three-dimensional twophase numerical model of PEM fuel cells is constructed. The impacts of hierarchical flow distribution on cell performance are examined by varying the channel width, height, and length, respectively. Firstly, a new insight is presented that uneven flow can enhance cell performance. Secondly, the performance variation is related to the self-uniform flow distribution in the gas flow channel based on the analysis of momentum and mass transfer, which is achieved by the compensatory flow in the porous media induced by the pressure difference between channels. Narrowing, lowering, and lengthening the channel can result in a stronger compensatory flow, respectively. Thirdly, a comprehensive evaluation indicator, i.e., the Self-Uniform Flow Distribution Coefficient (SUFDC), is developed to assess the capability of the self-uniform flow distribution of the cell. When the SUFDC is greater than 46.59, the more uneven the flow, the higher the cell performance. The findings of this work reveal the intrinsic relationship between hierarchical flow distribution and cell performance.