文献类型：期刊文献

英文题名：Dynamic Behavior and Drainage Characteristics of Water Droplets within Channel-Type Collection Zone in 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, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Div Proc Equipment Sci & Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：63

期号：24

起止页码：10851

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20242316220770);WOS:【SCI-EXPANDED(收录号:WOS:001240458000001)】；

基金：The research is supported by China National Postdoctoral Program for Innovative Talents (BX20230121), China Postdoctoral Science Foundation (2023M741163), and Shanghai Post-doctoral Excellence Program (2023741).

语种：英文

外文关键词：Flow of gases - Liquid films - Proton exchange membrane fuel cells (PEMFC)

摘要：The water transport processes in the bipolar plate, especially within the collection zone with water accumulation, are significant to the water management and performance enhancement of proton exchange membrane fuel cells (PEMFCs). In this article, a three-dimensional two-phase numerical model for the channel-type collection zone is constructed. The dynamic behavior of droplets is first studied. The droplets are drained in the form of a liquid film. Furthermore, the water drainage characteristics are quantified, and the effect of the channel geometry is clarified. It is indicated that the smaller the width of the collection channel, the less water accumulation. The reason lies in the reduction in the backflow area. Finally, an optimized elbow structure with 0.5 mm inner and 1.0 mm outer fillets is proposed in which case the water removal ratio increases by 8.58%, 9.16%, and 23.36% for 8, 6, and 10 m/s gas flow rates compared with the right-angle structure.