摘要
为了减少燃料电池在大电流密度运行过程中的电压损失,文章设计了循环蛇形流场,并采用数值方法对其电流密度、反应物浓度和压力分布进行了计算。仿真结果表明,循环蛇形流场在相邻流道之间产生较大的压差,从而增强对流传质,提高了催化层表面反应物浓度和分布的均匀度;在电压为0.4 V时,与多通道蛇形流场相比,循环蛇形流场的电流密度提高了8.3%。
In order to reduce the voltage loss of fuel cells during high-current density operation,the cyclic serpentine flow field was designed.And the current density,reactant concentration and pressure distribution were analyzed by numerical method.The numerical results reveal that the newly optimized flow field will generate larger pressure difference between adjacent flow channels,so as to enhance the under-rib reactant mass transport and improve the uniformity of oxygen distribution.When the voltage is 0.4 V,compared with the multi-channel serpentine flow field,the current density of the cyclic serpentine flow field increases by 8.3%.
作者
唐景春
柳奂宇
TANG Jingchun;LIU Huanyu(School of Automobile and Traffic Engineering, Hefei University of Technology, Hefei 230009, China)
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2021年第8期1021-1025,共5页
Journal of Hefei University of Technology：Natural Science
基金
合肥工业大学博士学位专项基金资助项目(JZ2016HGBZ0748)。
关键词
燃料电池
压差
脊下对流
流场
传质
fuel cell
pressure difference
under-rib convection flow
flow field
mass transfer
