摘要
阐述了微型燃料电池的制备过程,结合传统燃料电池数学理论和微流体力学,建立了微型质子交换膜燃料电池(μPEM FC)的数学模型,分析了微通道特性(如摩擦系数和水力直径等)对微型燃料电池性能的影响.结果表明:运用F luen t软件对模型进行计算的仿真结果与公开实验数据基本符合,验证了模型正确性;而传统模型的仿真结果小于真实值;当气道的水力直径Dh从348降至100时,电池性能有所上升;而当Dh值降至61.1时,其性能有所下降.
Progress of fabrication of micro fuel ceils is clarified using MEMS technology. Then a mathematical model of μPEMFC is introduced according to the traditional fuel cells＇ theories and the micro fluids. Based on the model, the effects on the performances of micro fuel ceils are analyzed as regard with different cross section micro channels. The model has been proved out satisfied by comparing the results of the simulation to the opened experimental data. Results show that reaction velocity in micro fuel cells is greater than the traditional fuel cells, and the hydraulic diameters of micro channels effect greatly on the performance of the fuel ceils.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2005年第6期574-577,共4页
Tribology
关键词
微型燃料电池
数学模型
微通道
摩擦系数
水力直径
micro fuel cell, mathematical model, micro channels, friction coefficient, hydraulic diameter
