船用平板式SOFC传递过程分析与数值模拟  

Transport Processes and Numerical Analysis of a Planar Solid Oxide Fuel Cell for Ship

作　　者：张中刚[1,2] 蔡伟强 郑青榕 陈志权[1] 荣辉 ZHANG Zhonggang;CAI Weiqiang;ZHENG Qingrong;CHEN Zhiquan;RONG Hui(Marine Engineering Institute,Jimei University,Xiamen 361021,Fujian,China;Fujian Provincial Key Laboratory of Naval Architecture and Ocean Engineering,Xiamen 361021,Fujian,China)

机构地区：[1]集美大学轮机工程学院,福建厦门361021 [2]福建省船舶与海洋工程重点实验室,福建厦门361021

出　　处：《船舶工程》2021年第11期73-79,138,共8页Ship Engineering

基　　金：国家自然科学基金(51979121);福建省自然科学基金(2018J01490,2021J01846);福建省中青年教师教育科研项目(JA15271);集美大学博士启动金(ZQ2018009);集美大学国家基金培育计划项目(ZP2022001)。

摘　　要：以某4 cm×4 cm平板式阳极支撑型SOFC为原型,建立三维计算流体力学模型,用其描述发生在多通道SOFC内的传质、传热和电化学反应等多物理场过程。通过计算给出顺流和逆流2种流动方式下电池内温度、流速、气体组分和电流密度等参数的分布。结果表明:2种流动方式下单电池内的温度分布是不均匀的,其中逆流方式下燃料出口处电池温度梯度最大;电流密度在电池内的分布很不规律,其最大值处于肋片、流道和电极的交界处,电流密度较大易造成欧姆损失较多、电阻热较大,对电池的性能和使用寿命都不利。A three-dimensional computational fluid dynamics(CFD)model is developed and applied for a 4 cm×4 cm anode-supported planar SOFC involving multi-channels,which is used to describe the electrochemical reactions,and the transfer processes of the mass,momentum,energy,charges(electrons and oxygen ions)occurring in the multi-channel SOFC.The distributions of temperature,flow rate,gas composition and current density in the battery under two flow modes of forward flow and reverse flow are given by calculation.The results show that the temperature distribution in the single cell is uneven under the two flow modes,and the cell temperature gradient at the fuel outlet is the largest under the counter-flow mode.The distribution of current density in the battery is very irregular,and its maximum value is at the junction of the fins,flow channels and electrodes.Larger current density is likely to cause more ohmic loss and larger resistance heat,which is detrimental to the performance and service life of the battery.

关 键 词：传递过程 电化学反应 多通道SOFC 三维CFD模型 数值模拟 

分 类 号：U664.121[交通运输工程—船舶及航道工程]