Abstract:

In order to study the effects of working parameters such as the working temperature and the pressure of reactive gases on the output performance of Proton Exchange Membrane Fuel Cell(PEMFC),an electrochemical model and a working parameter model of the cell were established.Then,by taking the Mark V fuel cell engine as an example.the variation of the output performance with the working temperature and the pressure of reactive gases
was simulated with Matlab software.The results show that(1)the mean cell power and voltage increases by 3%for each temperature increment of 10 K,with a slightly decreasing increment in high-temperature conditions;(2)the output perform ance of the cell can be improved by increasing the gas pressure,but the amplitude is limited by the fuel cell whose feasible working pressure is generally not more than 1 MPa;and(3)PEMFC possesses excellent in-stantaneous overloading ability.

Key words: proton exchange membrane, fuel cell, electrochemical model, steady condition, working parameter, simulation；optimization