Modélisation dynamique du "coeur" de pile à combustible de type PEM

Abstract : Being a new source of supplying electrical and thermal decentralized energy, the fuel cells offer better energy efficiency and reduced emissions for sustainable development. This thesis deals with the physicochemical phenomena that occur in a single cell of fuel cell proton exchange membrane. A 2Ddynamic model was developed and solved numerically by the finite element method using thesoftware COMSOL Multiphysics. The simulated static and dynamic polarization curves are confronted with measurements made on a 100cm² single cell test bench that belongs to GREEN Laboratory. Aparametric study, such as the influence of operating conditions, different stress current has been simulated and tested. The single cell dynamic behavior to a current step and more particularly to adirect connection to capacitor has underlined the importance of the electrical double layer phenomenon, located at the membrane / electrode interfaces, to describe precisely fast transients.Finally, spectroscopy impedance as a tool widely used to characterize the cell has been implemented in simulation allowing the analysis of the effects of this measurement method on the local parameters
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Dinh An Nguyen. Modélisation dynamique du "coeur" de pile à combustible de type PEM. Autre. Institut National Polytechnique de Lorraine, 2010. Français. ⟨NNT : 2010INPL035N⟩. ⟨tel-01748865⟩

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