传质
频道(广播)
质子交换膜燃料电池
机械
流量(数学)
扩散
传质系数
大规模运输
电流(流体)
输运现象
体积流量
扩散层
燃料电池
化学
计算机科学
材料科学
热力学
图层(电子)
物理
纳米技术
化学工程
工程类
电信
工程物理
作者
Weitong Pan,Xueli Chen,Fuchen Wang,Guohao Dai
标识
DOI:10.1016/j.ijhydene.2020.09.105
摘要
A comprehensive understanding of gas channel (GC)-gas diffusion layer (GDL) interrelations 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 parameters, further validating and quantifying the theoretical analysis.
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