反应气体流量和背压对PEM燃料电池性能的影响  

Effects of Reactant Flow Rate and Backpressure on the Performance of PEM Fuel Cells

作　　者：孙红[1] 吴玉厚[1] 

机构地区：[1]沈阳建筑大学交通与机械工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2006年第6期1034-1037,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然基金(50576060);辽宁省教育厅基金(05L349);辽宁省教育厅基金(2004D201);沈阳建筑大学省级重点实验室开放基金(JX-200603;JX-200605)

摘　　要：目的优化质子交换膜(PEM)燃料电池的操作参数,提高PEM燃料电池的性能和稳定性,降低成本.方法运用燃料电池测试站对有效面积为16 cm2的PEM燃料电池单体的伏安特性和功率密度进行了实验,分析了空气流量、氢气流量和背压对PEM燃料电池性能和功率密度的影响.结果试验结果发现:增大空气流量,燃料电池的性能可以持续提高;增大氢气的流量,电池性能先提高,但流量达到一定值后,性能几乎不变;增大电池背压,电池性能提高.结论电极的淹没现象主要存在于PEM燃料电池的阴极;实验条件下,氢气流量存在最佳值.By optimizing the operating parameters, the performance of PEM fuel cells and its stability are improved, and its cost decreases. The performance and power density of PEM fuel cell with effective area of 16cm^2 are investigated by means of fuel cell test station in the paper. The effects of the hydrogen flow rate, air flow rate, and backpressure on the voltage-current characteristics and power density of PEM fuel cell are analyzed. Experimental results show that the performance of PEM fuel cell improves with the increase of the airflow rate;with the increase of hydrogen flow rate, the cell performance improves firstly, and then keeps almost constant;the performance of PEM fuel cell increases with the increase of backpressure. Results also show that the electrode flooding occurs mainly in the cathode of PEM fuel cell;under the experimental condition, there exists the optimum value of hydrogen flow rate to keep the optimum performance in PEM fuel cell.

关 键 词：质子交换膜(PEM) 燃料电池(FC) 操作参数 极化曲线 

分 类 号：TU986.2[建筑科学—城市规划与设计]