电解
材料科学
流量(数学)
高温电解
多孔性
电解质
电解槽
欧姆接触
热的
机械
化学工程
电极
热力学
纳米技术
复合材料
化学
工程类
物理
物理化学
图层(电子)
作者
Yang Wang,Yingmeng Du,Meng Ni,Ruobing Zhan,Qing Du,Kui Jiao
标识
DOI:10.1016/j.applthermaleng.2020.114959
摘要
Flow field optimization has an evident effect on the performance improvement of solid oxide electrolysis cells (SOEC). In this study, a novel flow field based on porous material is proposed to improve the electrolysis efficiency of SOEC. The internal reforming reactions, multi-component diffusion process and co-electrolysis of H2O and CO2 are numerically studied by establishing a three-dimensional model. The results show that the novel design with porous material instead of conventional rib-channel configuration can lower the electrolysis voltage demand up to 0.062 V. To understand the mechanisms for the improved performance of the new flow field design, the multi-physical field distributions and thermal process are investigated. It is found that the new flow field design can ensure more uniform distribution of species concentration and reduce the maximum temperature difference by 3.81 K at 1.5 A cm−2. The thermal analysis indicates that the ohmic loss is the most important factor for temperature distribution. In addition, the structure and configuration of porous flow field are further optimized to obtain a better performance.
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