Analyzing Key Factors Influencing Water Transport in Open Air-Cooled PEM Fuel Cells
Autor: | Bin He, Lin Wei, Fengping Hu, Ahmed Mohmed Dafalla, Jian Guo, Cuihua Wang, Fangming Jiang |
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Jazyk: | angličtina |
Rok vydání: | 2024 |
Předmět: |
proton exchange membrane fuel cell
air-cooled water and heat management uniformity numerical analysis Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 |
Zdroj: | Materials, Vol 17, Iss 13, p 3267 (2024) |
Druh dokumentu: | article |
ISSN: | 1996-1944 |
DOI: | 10.3390/ma17133267 |
Popis: | The current limitations of air-cooled proton exchange membrane fuel cells (AC-PEMFCs) in water and heat management remain a major obstacle to their commercialization. A 90 cm2 full-size AC-PEMFC multi-physical field-coupled numerical model was constructed; isothermal and non-isothermal calculations were performed to explore the effects of univariate and multivariate variables on cell performance, respectively. The isothermal results indicate that lower temperature is beneficial to increase the humidity of MEA, and distribution uniformity at lower stoichiometric ratios and lower temperatures is better. The correlation between current density distribution and temperature, water content, and concentration distribution shows that the performance of AC-PEMFCs is influenced by multiple factors. Notably, under high current operation, the large heat generation may lead to high local temperature and performance decline, especially in the under-channel region with drier MEA. The higher stoichiometric ratio can enhance heat dissipation, improve the uniformity of current density, and increase power density. Optimal fuel cell performance is achieved with a stoichiometric ratio of 300, balancing the mixed influence of multiple factors. |
Databáze: | Directory of Open Access Journals |
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