WATER MANAGEMENT MODE FOR POLYMER-EXCHANGE

MEMBRANE FUEL CELLS

Bao Cheng  Wu Sai  Ouyang Minggao

(State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084)

Yi Baolian

(Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023)

Abstract: Water management is a key technology of polymer exchange membrane fuel cells (PEMFC). A one-dimensional, steady-state water management model for PEMFC is establish-ed including the overall parts of channels, gas diffusion layers and membrane. And the pseudo-homogeneous mo-del of catalyst layer of cathode is also described. The polarizati-on curve of simulation is very close to the test. Based on the mathematical model, the effects of operating conditions including gas flow rate, operating temperature, pressure, humidified temperature and relative humidity of inlet are analyzed. This model also provides a good base for the simulation, optimization and control of the overall fuel cell engine system.

Key words: PEM  Fuel cell  Water management  Model

CLC No: U473.4

国家863高科技资助项目(2001AA501100). Received 20040209, received in revised form 20040905