两种不同燃料下SOFC的三维多物理场数值模拟  

Three dimensional multiphysics numerical simulation of SOFC under two different fuels

作　　者：陈宇瑶 魏明锐[1] CHEN Yuyao;WEI Mingrui(College of Automotive Engineering,Wuhan University of Technology,Wuhan Hubei 430070,China)

机构地区：[1]武汉理工大学汽车工程学院,湖北武汉430070

出　　处：《电源技术》2021年第12期1599-1602,1649,共5页Chinese Journal of Power Sources

摘　　要：为确定不同燃料对电池性能的影响以及为电池燃料的选择提供理论依据,基于有限元模拟软件COMSOL Multiphysics,分别建立了以甲烷混合气和氢气为燃料的SOFC三维多物理场全耦合数值模型。研究结果表明:在0.30~1.05 V的工作电压范围内,燃料电池的功率密度都随着平均电流密度的变大,呈现出先增大,达到峰值后减小的趋势,氢气燃料电池的功率密度峰值要大于甲烷的;氢气燃料电池从入口处到出口处的温度上升了37 K,甲烷燃料电池上升了7 K,氢气燃料电池阳极出口处的温度要大于阴极,而甲烷燃料电池则正好相反;相同流量下,氢气燃料电池阴极内的空气流速小于甲烷燃料电池的,两种电池阳极燃料流速都会沿着流动方向增加。To determine the impact of different fuels on performance and to provide the theoretical basis for fuel selection in actual use,based on the finite element simulation software COMSOL Multiphysics,a three-dimensional multi-physics fully coupled numerical model of SOFC using methane gas and hydrogen as fuel was established.The research results indicate that within the working voltage range of 0.30~1.05 V,as the average current density increases,the power density of the two fuel cells increases first,and then decreases after reaching the peak.The peak power density of the hydrogen fuel cell is greater than that of methane;the temperature of the hydrogen fuel SOFC rises by 37 K from the inlet to the outlet,and the temperature of the methane fuel rises by 7 K.The temperature at the anode outlet of the hydrogen fuel SOFC is greater than that at the cathode,while the methane fuel SOFC is the opposite;at the same flow of rate,the velocity of oxygen in the cathode of hydrogen SOFC is less than that of methane SOFC,and the velocity of the anode of both SOFCs will increase along the flow direction.

关 键 词：甲烷重整 电化学反应 数值模拟 传热传质 

分 类 号：TM911.4[电气工程—电力电子与电力传动]