平板式固体氧化物燃料电池多物理场耦合建模  

Multiphysics Coupled Modeling of Planar Solid Oxide Fuel Cell

作　　者：宋明 王文慧 杜传胜 王炳英[2] 蒋文春[3] SONG Ming;WANG Wen-Hui;DU Chuan-Sheng;WANG Bing-Ying;JIANG Wen-Chun(College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,China;College of Materials Science and Engineering,China University of Petroleum(East China),Qingdao 266580,China;College of New Energy,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,青岛266580 [2]中国石油大学(华东)材料与科学工程学院,青岛266580 [3]中国石油大学(华东)新能源学院,青岛266580

出　　处：《工程热物理学报》2021年第9期2401-2408,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51805543);山东省自然科学基金资助项目(No.ZR2019MEE108,ZR2017BEE037);中央高校基本科研业务费专项资金项目(No.18CX05002A)。

摘　　要：固体氧化物燃料电池(Solid oxide fuel cell,SOFC)在高温下工作,影响电池性能和结构完整性的因素众多,如何能够综合考虑这些因素并准确地预测和优化电池结构与工作性能是亟待解决的问题。使用COMSOL软件建立了单个平板式固体氧化物燃料电池多场耦合有限元三维模型,考虑电化学反应、物质浓度、流体流动、传热和固体力学多物理因素共同作用下,探明了电池在工作阶段的气体摩尔分数、电流密度、温度和热应力的分布规律。结果表明,氢气和氧气的摩尔分数随着气体流动的方向逐渐降低;在电池空气入口处,电解质电流密度较大;电池温度分布不均匀并产生了较大的热应力。本文建立的SOFC多场耦合模型可为后续SOFC的研究提供分析方法和理论支持。Solid oxide fuel cell (SOFC) operate at high temperature. There are many factors thataffect the performance and structural integrity of SOFC. Predicting and optimizing the structureand performance of SOFC with considering all these factors comprehensively are an urgent problem,which are need to be solved. A multiphysics coupled three-dimensional model of single planar solidoxide fuel cell is developed by using COMSOL software in this study. The mole fraction of fuel gas,current density, distribution of temperature and thermal stress in the operating process of the cell isinvestigated under the combined effects of multiphysics, including electrochemistry, chemical speciestransport, fluid flow, heat transfer, and structural mechanics. The results show that the mole fractionof hydrogen and oxygen decreases along the direction of gas flow, the current density of electrolyteis the largest at the air inlet of the cell and the temperature distribution of the cell is not uniformand generates larger thermal stress. The multiphysics coupled numerical model of SOFC developedin this study provides an analysis method and theoretical support for the design of SOFC.

关 键 词：固体氧化物燃料电池 多场耦合 电池性能 有限元建模 

分 类 号：TM911.42[电气工程—电力电子与电力传动]