阶梯电流密度加载模式对PEMFC冷启动性能的影响  

Effect of stepped current density loading mode on PEMFC cold start performance

作　　者：邵佳雄 牛志刚 陈醒 赵富强[2] SHAO Jiaxiong;NIU Zhigang;CHEN Xing;ZHAO Fuqiang(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Heavy Machinery Engineering Research Center of Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]太原科技大学重型机械教育部工程研究中心,山西太原030024

出　　处：《武汉科技大学学报》2024年第4期298-304,共7页Journal of Wuhan University of Science and Technology

基　　金：山西省揭榜招标项目(20201101020).

摘　　要：在质子交换膜燃料电池(PEMFC)商业化过程中,其在低温环境下的冷启动能力是关键技术难题之一。本文通过建立PEMFC的集总参数模型,探究了阶梯电流密度加载模式对其在-20℃下冷启动性能的影响,重点考察了初始电流密度、电流密度变化周期及电流密度增加速率3个参数。此外,为优化模型参数选择,本文引入了一种改进的粒子群优化(PSO)算法,该算法在提高收敛速度和逃逸局部最优解方面表现优越,并利用新算法确定了给定条件下PEMFC的最佳工作点。仿真结果表明,相比于传统的恒流冷启动模式,在-15℃下,采用阶梯电流密度加载模式可将PEMFC的冷启动时间缩短约13.9%。In the commercialization of proton exchange membrane fuel cells(PEMFC),the cold start capability in low-temperature environments represents one of the key technical challenges.In this study,an aggregate parameter model for PEMFC was developed,and the effect of the stepped current density loading mode on the cold start performance of PEMFC at-20℃was investigated,focusing on three parameters:initial current density,current density change period,and rate of increase in current density.Additionally,to optimize parameter selection,an improved particle swarm optimization(PSO)algorithm was introduced,which excels in enhancing convergence speed and escaping local optima.With this new algorithm,the optimal working point for PEMFC under specified conditions was determined.Simulation results show that,compared with the traditional constant current cold start mode,the stepped current density loading mode could reduce the cold start time of PEMFC by about 13.9%at-15℃.

关 键 词：质子交换膜燃料电池 阶梯电流密度 冷启动 粒子群优化算法 最佳工作点 

分 类 号：TK91[动力工程及工程热物理]