Numerical study of PEMFC heat and mass transfer characteristics based on roughness interface thermal resistance model

被引:16
|
作者
Shang, Kang [1 ]
Han, Chaoling [2 ]
Jiang, Tao [1 ]
Chen, Zhenqian [1 ]
机构
[1] Southeast Univ, Sch Energy & Environm, Nanjing, Peoples R China
[2] Nanjing Tech Univ, Coll Emergency Management, Nanjing 211816, Peoples R China
基金
中国国家自然科学基金;
关键词
PEM fuel Cell; Thermal contact resistance; Surface roughness; Heat transfer; Mass transfer; GAS-DIFFUSION LAYERS; CONTACT RESISTANCE; FUEL; EXCHANGE; CONDUCTIVITY; TEMPERATURE; MANAGEMENT; PERFORMANCE; CHANNELS; STACK;
D O I
10.1016/j.ijhydene.2022.11.201
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The thermal contact resistance (TCR) is the main component of proton exchange mem-brane fuel cell (PEMFC) thermal resistance due to the existence of surface roughness be-tween the components of PEMFC, and the influence of TCR is often ignored in traditional three dimensional PEMFC simulations. In this paper, the heat and mass transfer charac-teristics including polarization curve, power density curve, temperature distribution, membrane water content distribution, membrane current density are studied under different component surface roughness conditions, and finally the effect of each TCR on the PEMFC performance is studied. It is found that under the same operating conditions, the TCR makes the radial heat transfer of the PEMFC decrease, and the temperature of the membrane electrode and the temperature difference of each component of the PEMFC is higher than that of the model without TCR. When the surface roughness of components in the PEMFC equals 1 mm, 2 mm, 3 mm, the cell current density decreases by 6.56%, 12.46% and 17.17% respectively when the output cell voltage equals 0.3 V, and the cell power density decreases by 3.64%, 7.54%, 13.14% respectively when the cell current density equals 1.2 A center dot cm-2. When the TCR between the CL and PEM equals 0.003 K center dot m2 center dot W-1, 0.005 K center dot m2 center dot W-1, 0.01 K center dot m2 center dot W-1, the cell current density is increased by 2.30%, 3.65%, 6.74% respectively under the condition that the output cell voltage equals 0.3 V, and the cell power density is increased by 1.24%, 1.85%, 3.10% respectively when the cell current density equals 1.2 A center dot cm-2. The results show that the numerical simulation of PEMFC cannot ignore the effect of TCR.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:7460 / 7475
页数:16
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