PEM燃料电池操作性能实验分析

Experimental Analysis of the Operating Performance of PEM Fuel Cell

目的研究质子交换膜燃料电池运行中电池的工作压力、反应气体流量对电池性能的影响.方法对质子交换膜电池单体在不同工作压力、不同气体流量下的电池性能变化做了测试并将得到的实验数据进行对比及理论分析.结果通过实验得出了压力和气体流量对电池性能影响的规律曲线.结论PEM燃料电池的性能随着压力的升高而提高.随气体流量的变化,可将曲线划分为气体供应短缺、饱和和过量三个区域.同时按照电流密度计算所得到的气体消耗量可以在实验中得到很好地验证.实验结果对质子交换膜燃料电池结构的优化和设计具有重要的指导意义.

The purpose of the paper is to test the impact of different operating pressure and flux on the performance of proton exchange membrane fuel cell, to create the systematic experimental data under different operating conditions, and to analyze the results theoretically. Using the testing system of PEM fuel cell monomer, experiments of different cell pressure and flux have been carried out. Results of the experimental data are processed by Origin software, and the cell polarization curves under the different operating conditions are gained. Thus the pictures visually describe the experimental results. Conclusions are drawn as follows：With increasing pressure, the performance of PEM fuel cells rises. With gas flow changing, the curve can be partitioned into three regions, respectively gas supply shortages, saturation and excess. At the same time, gas consumption, which is calculated by current density, coincides well with experimental data. Experimental results on proton exchange membrane fuel cell structure and the optimization are of great significance in guiding the design.