【摘要】 为研究以碳氢化合物为燃料的镍基阳极固体氧化物燃料电池（SOFC）中复杂的多物理场传递过程，以某实际生产的SOFC为原型，基于有限元法分别建立了顺流和逆流两种不同进气方式的多物理场三维模型．分析了典型工况下电极化学反应、多组分传质、传热过程的耦合特性，并给出了热应力分布．结果表明，SOFC的温度分布趋势受工作电压的影响较大，且同电压下逆流方式电池内的最大温差低于顺流方式；气体流向配置会影响SOFC内部化学反应速率，且顺流时反应速率分布得更为均匀；甲烷裂解反应受到抑制，最大反应速率仅为9.97×10^-4mol/（m³·s），积碳活性远远小于1；从电解质层到阴极层，会发生应力突变，应力值从32 MPa骤升至294 MPa.更多还原

【Abstract】 In order to study the complex multi-physical field transfer process in a nickel-based anode solid oxide fuel cell（SOFC）fueled by hydrocarbon fuel,a three-dimensional model based on the finite element method was established,which can be used in both the co-flow and counter-flow situation. The coupling characteristics of electrode chemical reaction,multi-component mass transfer and heat transfer process under typical operating conditions were analyzed,and the thermal stress distribution was also given. The results show that the temperature distribution in the SOFC is strongly affected by the operating voltage,and under the same voltage,the maximum temperature difference in the cell of the counter-flow is lower than that of the co-flow. The flow arrangements will affect the internal chemical reaction rate of the SOFC,and the reaction rate distribution in the co-flow is more even. The methane cracking reaction is inhibited,the maximum reaction rate is only 9.97×10^-4 mol/（m³·s）,and the carbon deposition activity is far smaller than 1. From the electrolyte layer to the cathode layer,there will be a sharp change in stress,and the stress value rises from 32 MPa to 294 MPa.更多还原