质子交换膜燃料电池仿生波浪形三通道蛇形流场性能研究OA

The performance of proton exchange membrane fuel cells is significantly influenced by their flow field structure and operating conditions.A novel three-channel bionic wavy flow field structure was designed based on the streamlined shape of a bird's abdomen,combined with a three-channel serpentine flow field,and arranged with counter-flow cathode/anode.Through simulation studies,the performance differences between the bionic wavy flow field and the traditional serpentine flow field were compared and analyzed,and the effects of operating conditions(including anode/cathode inlet humidity and cell temperature)on cell performance were investigated.The results show that at a current density of 1.8 A/cm2,the bionic wavy flow field,compared to the three-channel serpentine flow field,increases the output voltage by 1.78％and the total output power by 1.645％,but the pressure drop increases by 4.6 times.Additionally,operating conditions have a significant impact on cell performance:anode inlet humidity at low or high levels leads to performance degradation,while medium humidity yields the best performance;cathode inlet humidity has a minor effect on performance at medium to high levels,but performance declines significantly at low humidity.Therefore,in practical applications,it is recommended to use medium anode inlet humidity,medium to high cathode inlet humidity to optimize cell performance.