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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

NUMERICAL INVESTIGATION OF CLAMPING SYSTEM EFFECTS ON THE COLD START POLYMER ELECTROLYTE FUEL CELL PERFORMANCE

Ahmed Mohmed Dafalla
Laboratory of Advanced Energy Systems, CAS Key Laboratory of Renewable Energy, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (CAS), China; University of Chinese Academy of Sciences, China

Lin Wei
Laboratory of Advanced Energy Systems, CAS Key Laboratory of Renewable Energy, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (CAS), China

Zihao Liao
Laboratory of Advanced Energy Systems, CAS Key Laboratory of Renewable Energy, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (CAS), China; University of Chinese Academy of Sciences, China

Fangming Jiang
Laboratory of Advanced Energy Systems, Guangdong Key Laboratory of New and Renewable Energy Research and Development, CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (CAS), Guangzhou 510640, China

DOI: 10.1615/IHTC16.ecl.023910
pages 4181-4194


Ключевые слова: Fuel cell, Computational methods, Cold start, Clamping pressure, Deformation

Аннотация

Many parameters influence the durability and overall performance of the fuel cell. The applied clamping pressure results in dimensional and physical changes on the fuel cell components, but it is essential to decrease the contact resistance between the different layers and to prevent the leakage of reactants. The published research confirmed the importance of including the clamping pressure effects on the polymer electrolyte fuel cell modeling and simulation. However, the behavior of cold start polymer electrolyte fuel cell (CS-PEFC) under the applied compressive force is not yet discussed in the literature. This paper numerically investigates the effects of clamping system on the CS-PEFC performance. The CFD model that has been developed for cold start simulation in a previous work is further extended to include the effects of the assembly pressure. By using this model, the changes on CS-PEFC performance is explored and analyzed in terms of water flow, ice formation, heat generation, permeability, and tortuosity. It is found that setting a proper clamping pressure is important to achieve an enhanced performance. This work helps to provide insight into the internal behavior of CS-PEFC under clamping pressure, and the proposed model can be further improved in the future for developing a PEFC of better cold start performance.

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