迷宫式新型流道对质子交换膜燃料电池的性能优化

质子交换膜燃料电池(proton exchange membrane fuel cell, PEMFC)具有广泛的应用前景。为了提升流道构型对于质子交换膜燃料电池的综合性能，通过建立一种三维单相、等温的圆形交错迷宫式流道质子交换膜燃料电池模型，分析新型流道对质子交换膜燃料电池的输出性能、阴极氧和水浓度分布及阴极进气流速的影响。结果表明，圆形交错式流道相较于矩形交错式流道和蛇形流道电流密度提升25%和143%,也可以明显的改善流道内反应物和产物的分布和输运。阴极进气流速的增加可以提升电池的性能，但也会带来其他额外的损耗。可见，圆形交错式流道可以有效提升输出性能，改善氧和水的分布。

Study on Performance Optimization of a new labyrinth runner for PEMFC

Proton exchange membrane fuel cells (PEMFC) have wide application prospects. In order to improve the comprehensive performance of PEMFC with flow channel configuration, a single-phase, three-dimensional, isothermal model of PEMFC with circular staggered labyrinth flow channels was established, and the effects of new flow channels on the output performance, cathode oxygen and water concentration distribution and cathode inlet flow rate of PEMFC were analyzed. The results show that the current density of circular staggered channel is increased by 25 % and 143 % compared with rectangular staggered channel and serpentine channel, the distribution and transportation of reactants and products in the channel can also be obviously improved. The increase of cathode inlet flow rate can improve the performance of the PEMFC, but it will also bring other additional losses. It is concluded that the circular staggered flow channel can effectively improve the output performance of PEMFC and improve the distribution of oxygen and water.