화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.38, No.9, 3767-3772, 2013
Experimental investigation of the steady-state efficiency of fuel cell stack under strengthened road vibrating condition
The steady-state efficiency of the fuel cell stack is experimentally investigated in terms of steady-state hydrogen utilization, actual efficiency and maximum efficiency point through a 162 h strengthened vibration test in this paper, in order to analyse the steady-state performance of the fuel cell stack under long-term vibrating condition on strengthened roads. The load spectra applied in the test are simulated by the acceleration signals of the fuel cell stack, which are previously measured in a vehicle vibration test. The load signals of the vehicle vibration test are iterated through a road simulator from vehicle acceleration signals which are originally sampled in the strengthened road of the ground prove. The test results show that the steady-state hydrogen utilization of the stack decreases by 30.7% during the test. The maximum drop of steady-state actual efficiency is 21.0%. Additionally, the maximum efficiency point of the stack declines by 5.4%, while the corresponding current experiences an increment of 47.2 A. From the results it can be concluded that the strengthened road vibration exerts a significant influence on the steady-state performance of the fuel cell stack, which cannot and should not be ignored during the research. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.