文献类型：期刊文献

英文题名：Mass transfer enhancement of PEM fuel cells with optimized flow channel dimensions

作者：Pan, Weitong[1];Chen, Xueli[1];Wang, Fuchen[1];Dai, Gance[2]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2021

卷号：46

期号：57

起止页码：29541

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20204209353621);WOS:【SCI-EXPANDED(收录号:WOS:000684995300018)】；

语种：英文

外文关键词：Proton exchange membrane fuel cell; Mass transfer resistance; Mass transfer area; Flow channel design; Channel width; Gas diffusion layer

摘要：A comprehensive understanding of gas channel (GC)-gas diffusion layer (GDL) in-terrelations incorporating the mass transfer coefficients, resistances, and areas provides guidelines for the flow channel design. This paper is based on the "flow field analysis scheme" that combines theoretical analysis and numerical simulation. In the analysis, transport-reaction interactions are clarified using multiple resistances in series approach. Results indicate that the external mass transfer resistance is primarily confined to the GDL; and instead, the GC-GDL interface should be highlighted for a uniform transport flux. It is further revealed that the reconciliation of the mass transfer area and coefficient is the key to enhanced transport capability. On this basis, the analytical solution of optimal channel width is obtained; and its coordination with the flow rate is established. Next, a typical single-channel fuel cell model is investigated with various geometric and operating pa-rameters, further validating and quantifying the theoretical analysis. (c) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.