Dynamic Response during PEM Fuel Cell Loading-up

Materials

Pucheng Pei¹  Xing Yuan²  Jun Gou² 

[1] State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;

关键词: PEM fuel cell;    loading-up;    gas dynamic response;    starvation;   

DOI  :  10.3390/ma2030734

来源: mdpi

【 摘 要 】

A study on the effects of controlling and operating parameters for a Proton Exchange Membrane (PEM) fuel cell on the dynamic phenomena during the loading-up process is presented. The effect of the four parameters of load-up amplitudes and rates, operating pressures and current levels on gas supply or even starvation in the flow field is analyzed based accordingly on the transient characteristics of current output and voltage. Experiments are carried out in a single fuel cell with an active area of 285cm². The results show that increasing the loading-up amplitude can inevitably increase the possibility of gas starvation in channels when a constant flow rate has been set for the cathode; With a higher operating pressure, the dynamic performance will be improved and gas starvations can be relieved. The transient gas supply in the flow channel during two loading-up mode has also been discussed. The experimental results will be helpful for optimizing the control and operation strategies for PEM fuel cells in vehicles.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.