Etude dynamique d'un système de stockage par chaleur latente liquide-solide : application au véhicule électrique

Abstract : This study focuses on the development of a heat storage system used to ensure passenger compartment thermal comfort in an electric vehicle. This device, called a thermal battery, is a packed bed latent heat tank filled with phase change materials (PCM). This type of material has the property of storing large amounts of latent heat in small volumes, allowing a very compact system. At the material scale, an investigation on heat transfer dynamics within several PCM was studied. A phenomenological expression which depicts the temporal evolution of the PCM temperature for a solidification phase was suggested. This allows the estimation of the material solidification duration in terms of geometric and thermal characteristics. At the system scale, a thermal battery prototype was set up and the thermal transfer dynamics during the charging and discharging phases were studied. The charging and discharging durations are fitted by power laws in terms of the flow rate; the pressure drops are insignificant. Simultaneously, a numerical model which simulates the dynamic and thermal behavior of a PCM particle fixed bed was developed and validated with the experimental data. It can be used for future prototype sizing and will also serve as a tool to optimize the performance of the battery by setting the control parameters
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Remy Osipian. Etude dynamique d'un système de stockage par chaleur latente liquide-solide : application au véhicule électrique. Physique [physics]. Université Sorbonne Paris Cité, 2018. Français. ⟨NNT : 2018USPCC052⟩. ⟨tel-02157959⟩

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