瓦楞式与平板式固体氧化物燃料电池的性能研究

Performance study of corrugated and flat plate solid oxide fuel cells

良好的流道形式可以促进反应气体在通道和多孔电极中的传递和扩散,进而提升固体氧化物燃料电池(SOFC)的性能。构建了两种SOFC模型:瓦楞式和平板式。研究结果表明:瓦楞式与平板式SOFC的功率密度在电池工作电压0.6 V时都达到最大,此时瓦楞式SOFC的功率密度为7419 W/m^(2),比平板式6982 W/m^(2)提升了437 W/m^(2),功率密度增加了6.26%。瓦楞式流道结构SOFC中通道内反应气体速度整体提升,阴极氧气平均摩尔浓度对比增加0.69 mol/m^(3)。四种流道改进下,结合温度与功率密度,可知53°时,瓦楞式SOFC性能达到最优。

Good flow channel form can facilitate the transfer and diffusion of reactive gases in channels and porous electrodes,thus improving the performance of solid oxide fuel cells(SOFC).Two SOFC models were constructed:corrugated type and plate type.The results show that:corrugated and flat SOFC power density in the battery operating voltage of 0.6 V have reached the maximum,at this time corrugated SOFC power density is 8532 W/m^(2),7793 W/m^(2)than the flat increased 739 W/m^(2),power density increased by 9.48%.In the corrugated channel structure SOFC,the reaction gas speed in the channel is improved as a whole,and the average molar concentration of oxygen at the cathode is increased by 0.69 mol/m^(3).Four kinds of flow channel improvement,combined with temperature and power density,it is known that 53°,corrugated SOFC performance to achieve the optimal.