阳极孔隙率对固体氧化物燃料电池性能影响的数值分析

NUMERICAL ANALYSIS OF THE PERFORMANCE OF PLANAR ELECTRODE SUPPORTED SOLID OXIDE FUEL CELL WITH DIFFERENT POROSITIES

基于商用计算流体动力学软件及开发的燃料电池多孔介质内多组分流动和扩散、传热传质、电化学反应、电流场等复杂的物理过程的计算程序,对采用不同孔隙率阳极的平板式阳极支撑固体氧化物燃料电池(planar-electrode-support solid oxide fuel cell,PES-SOFC)的性能进行数值计算,得到不同阳极孔隙率下单电池内部各气体组分浓度、温度、电势、电流、电流密度等参数的分布。由计算结果可知,在阳极孔隙率为0.3～0.4之间时,以氢气为燃料的该类型SOFC单电池表现出较好的气体扩散和电流传导特性,相应输出电压也较高。

Based on a commercial fluid dynamics software and the developed program used to calculate multi-component flow and diffusion,mass/heat transfer,electrochemical reaction and current,the performance of planar-electrode-support solid oxide fuel cell （PES-SOFC） with different porosity anodes was analyzed.The distributions of species concentration,temperature,electric potential,current and current density of SOFC were calculated for the anode with different porosities.According to the results,the SOFC with hydrogen fuel shows good performance of species diffusion,current transfer and power output when the porosity of anode is at 0.3-0.4.