渐变型流道燃料电池热-电-力-化多场耦合数值模拟  

Thermo-Electro-Mechanical-Chemical Multiphysics Coupling Model and Numerical Simulation on Fuel Cell With Gradual Flow Channel

作　　者：徐琪 缪馥星[1] 官万兵 XU Qi;MIAO Fuxing;GUAN Wanbing(Key Laboratory of Impact and Safety Engineering,Ministry of Education of China,Ningbo University,Ningbo 315211,Zhejiang,China;Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,Zhejiang,China)

机构地区：[1]宁波大学冲击与安全工程教育部重点实验室,浙江宁波315211 [2]浙江省先进燃料电池与电解池技术重点实验室,中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《力学季刊》2023年第2期316-328,共13页Chinese Quarterly of Mechanics

基　　金：国家重点研发计划(2021YFB2500400);国家自然科学基金(U20A20251,11932005);浙江省重点研发项目(2021C01101);宁波科技创新2025重大项目(2019B10046,2020Z107)。

摘　　要：本文设计了一种渐变型气体流道的平管型固体氧化物燃料电池(Solid oxide fuel cell,SOFC),并建立了热-电-力-化学多物理场耦合三维模型,模拟并对比分析了渐变型和蛇形两种不同流道结构在平管型固体氧化物燃料电池不同电压下的气体流速、温度、电流密度和热应力大小.结果表明,当电压高于0.7 V时,渐变型流道气摩尔分数相比蛇形流道情形增加了1.9%.在相同电压下,渐变型流道结构的电流密度增加了0.72%,渐变型流道情形的气体出口处流速增加了148%,且渐变型流道SOFC的温度场和热应力相比蛇形流道情形分别降低了8.7%和61.5%.In this study,a flat-tube solid oxide fuel cell(SOFC)with gradual air channel is designed and a three-dimensional model based on the thermo-electro-mechanical-chemical multi-physics coupling is established.The gas flow rate,temperature,current density,and thermal stress of the flat-tube solid oxide fuel cell under different voltages are computed and analyzed.The results are compared with those of triple-parallel serpentine structures.The analysis results show that when the voltage is higher than 0.7V,the gas mole fraction in the gradual air channel increases by 1.9%compared with that in the serpentine channel.At the same voltage,the current density of the gradual flow channel structure increases by 0.72%,the flow velocity at the gas outlet of the gradual flow channel increases by 148%,and the temperature field and thermal stress of the gradual flow channel SOFC decrease by 8.7%and 61.5%respectively compared with the serpentine channel.

关 键 词：蛇型流道 渐变型流道 多场耦合分析 数值模拟 固体氧化物燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]