Air-cooling PEMFC

that is of some advantages such as simpler structure

lower energy consumption and so on

has good potential for the application in the fields of portable power sources.In this paper

the experiments are designed to study the effect of load and environment temperature on the operation temperature of PEMFC stack

and to find out that of operation temperature and humidity on its output performance.A model based on genetic algorithm is established for temperature characteristic

and fuzzy-PID fusion control algorithm is used for the design of temperature controller.And finally

to make sure the optimum performance of PEMFC stack output

several different modes are adopted to control the cycle of exhaust emission

according to the humidity features at various output current.