多物理
电解
质子交换膜燃料电池
传热
电解水
热交换器
焦耳加热
材料科学
过热(电)
核工程
极化(电化学)
化学工程
电流密度
膜
化学
机械
热力学
机械工程
复合材料
电极
有限元法
工程类
电气工程
生物化学
物理
物理化学
量子力学
电解质
作者
Chao Su,Zhidong Chen,Zexuan Wu,Jing Zhang,Kaiyang Li,Junhong Hao,Yanqiang Kong,Naiqiang Zhang
出处
期刊:Applied Energy
[Elsevier BV]
日期:2023-12-14
卷期号:357: 122442-122442
被引量:15
标识
DOI:10.1016/j.apenergy.2023.122442
摘要
During the long-term operation of proton exchange membrane water electrolyzers (PEMWEs), Formation of localized hotspots in the catalyst-coated membrane (CCM) will seriously threaten the safe and efficient operation of the electrolyzer. This paper adopts a combination of dynamic experiments and numerical simulation analysis, aiming to develop the in-situ characterization technology of the thermal characteristics as well as the theoretical analysis of the multiphysics field for the·PEMWE. Based on both experimental and theoretical results, it is concluded that: (1) The high current density leads to an extremely uneven temperature distribution on the surface of the CCM. High temperature difference (as high as 34.04 °C) and high local temperature (up to 98.08 °C) are observed; (2) 30–50% of the electrical energy during the electrolyzer is converted into heat, of which the polarization heat accounts for the major part, followed by proton-conductive Joule heat; (3) The accumulation of gas phase during the transfer process of gas-liquid two phases is the primary cause of the deterioration of heat transfer, which further leads to local overheating. This study provides an experimental and theoretical basis for the safe and efficient operation of proton exchange membrane water electrolysis technology.
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