高温聚合物电解质膜燃料电池大尺寸(200cm²)多蛇形流场模拟与优化

This work investigates the influence of the arrangements of a large-scale (100mm×200mm, 200cm²) multiple-serpentine flow field on the output performance of high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) by numerical simulation and experimental study. Compared with the vertical arrangement manner, the horizontal one allowed the fuel cell to produce a higher average current density of 222.78mA/cm² and a more uniform current density distribution (uniformity index of 75.3%) when the air intake was 1.527L/min and the cell voltage was 0.6V. Furthermore, the number of the gas channels in the flow field was optimized. The results showed that the increase of inlet gas channels significantly reduce the pressure drop, but the average output current density and uniformity index of the fuel cell were decreased accordingly. The multiple-serpentine flow field with 9 channels horizontally arranged showed higher output performance and better current density distribution uniformity than that with 14 channels and lower pressure drop than that with 6 channels. This work provides a good guide for improving the performance and stability of HT-PEMFCs and their commercial applications.