堆栈(抽象数据类型)
质子交换膜燃料电池
机械
水蒸气
热的
体积流量
气流
电流(流体)
材料科学
流量(数学)
化学
计算流体力学
核工程
热力学
膜
分析化学(期刊)
色谱法
工程类
计算机科学
程序设计语言
有机化学
物理
生物化学
作者
Guobin Zhang,Zhiguo Qu,Yun Wang
标识
DOI:10.1016/j.enconman.2022.116211
摘要
This study presents one of the first full-scale stack three-dimensional (3D) simulations for proton exchange membrane (PEM) fuel cell to investigate temperature distribution, cell/stack performance, and impact of air cooling. The stack consists of 30 cells with the active area of 50 mm × 200 mm for each fuel cell. The manifold and all the basic components are included in the computational domain, while the flow field structure is treated as porous media in order to reduce the computational burden. The model predictions are validated against the experimentally measured voltage and detailed temperature distribution under different currents. It is found that significant differences in temperature are present between the fuel cells at the two sides and that in the middle, and the oxygen content becomes lower at a higher temperature site due to the local increased water vapor concentration. As a consequence, thermal behavior has a decisive effect on the distributions of temperature, reactant concentration, membrane hydration, current density, etc., inside this air-cooled stack. It is also found that increasing the cooling air flow rate not only decreases the stack temperature, but also reduces the temperature variation, which further benefit the uniform distributions of oxygen, water vapor, etc. in the stack.
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