期刊
ENERGY CONVERSION AND MANAGEMENT
卷 251, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2021.114991
关键词
PEMFC; Cold start -up; Current loading modes; Stepwise-changed mode
资金
- NNSFC [51836005]
- International Exchange Cooperation Project of NSFC-STINT [51911530157]
- National Key Research and Development Program [2017YFB0102702]
- Basic research Project of Shaanxi Province [2019ZDXM3-01]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51721004]
This study investigated the effects of five different current loading modes on the start-up process of PEMFC at low temperatures, with the results showing that the stepwise-changed current loading mode outperformed the other four modes in terms of appropriate start-up time, temperature rising rate, ohmic resistance, heat generation rate, ice volume fraction, and water production rate.
The start-up of the proton exchange membrane fuel cell (PEMFC) at temperatures below the freezing point is considered one of the major obstacles hindering the widespread commercialization applications of fuel cells. In this work, a one-dimensional transient numerical model is adopted to study the effects of five different current loading modes on the stack start-up from -20 degrees C. They are constant current loading mode, constant slope ramp loading mode, variable slope ramp loading mode, zigzag current loading mode, and stepwise-changed current loading mode. The detailed comparative analyses are presented for a better understanding of the cold start-up process. Three levels (good, appropriate, and inferior) are used to evaluate the performance of the current loading modes. The results show that the stepwise-changed current loading mode is the best among the five modes because it has the advantages of appropriate start-up time, temperature rising rate, ohmic resistance, heat generation rate, ice volume fraction, and water production rate.
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