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The effects of air stoichiometry and air excess ratio on the transient response of a PEMFC under load change conditions

Authors
Kim, BosungCha, DowonKim, Yongchan
Issue Date
15-1월-2015
Publisher
ELSEVIER SCI LTD
Keywords
Proton exchange membrane fuel cell; Transient response; Air excess ratio; Air stoichiometry; Self-humidification
Citation
APPLIED ENERGY, v.138, pp.143 - 149
Indexed
SCIE
SCOPUS
Journal Title
APPLIED ENERGY
Volume
138
Start Page
143
End Page
149
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/94642
DOI
10.1016/j.apenergy.2014.10.046
ISSN
0306-2619
Abstract
The transient response of a proton exchange membrane fuel cell (PEMFC) is an important issue for transportation applications. The objective of this study is to investigate the effects of operating and controlling parameters on the transient response of a PEMFC for achieving more stable cell performance under load change conditions. The transient response of a PEMFC was measured and analyzed by varying air stoichiometry, air humidity, and air excess ratio (AER). The optimal air stoichiometry and AER were determined to minimize the voltage drop, undershoot, and voltage fluctuation under the load change, while maintaining high cell performance. Based on the present data, the optimal air stoichiometry was determined to be between 2.0 and 2.5, and the optimal AER was suggested to be between 1.65 and 2.0. (C) 2014 Elsevier Ltd. All rights reserved.
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