Gestion de l'eau dans un système pile à combustible pour traction automobile : transferts couplés dans un humidificateur membranaire

Abstract : This report presents a synthesis of works carried out in order to solve the water management problematic in a PEM fuel cell system. An analysis of the different components of the system air line, and more specifically the membrane humidifier, is realized in order to determine the architecture allowing the optimal moisture content of air upstream the fuel cell whatever the operating conditions. This study involves the description and the understanding of coupled heat and mass transfers within the humidifier, through numerical and experimental approaches. The numerical section contains a model of coupled transfer through a Nafion membrane. Associated with a thermodynamic analysis of the humidifier, it allows to define two parameters characterizing respectively the mass exchanges and the heat transfers, according to the inlet conditions of the fluids or as well as to the exchanger geometry. These parameters turn out to be useful design tools. The experimental section allows to estimate the interactions between a fuel cell, the humidifier and the other air line components. Besides the analysis of components response to a current intensity variation, the investigations allowed to demonstrate that the operating conditions of the system is compatible with the chosen humidification technology.
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Corinne Dalet. Gestion de l'eau dans un système pile à combustible pour traction automobile : transferts couplés dans un humidificateur membranaire. Autre [cond-mat.other]. Université Henri Poincaré - Nancy 1, 2009. Français. ⟨NNT : 2009NAN10136⟩. ⟨tel-01748224⟩

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