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Article Dans Une Revue International Journal of Thermal Sciences Année : 2022

Estimating thermal properties of phase change material from heat flux measurements

Résumé

An inverse analysis is applied to estimate the effective heat capacity and thermal conductivity of phase change material (PCM) as function of temperature. A sequential work in two distinct parts was adopted here which consists in the estimation of the thermal properties of the PCM in the solid and liquid states in a first step and completed by the characterization of the phase change in a second step. The effective heat capacity is judiciously parameterized as temperature dependent function to take into account the phase change phenomenon and its two solid and liquid phases. An experimental setup was built to collect the heat fluxes and temperatures histories around and inside a one dimensional sample of PCM. First the experimental data were used to estimate thermal conductivity and specific heat both at solid and liquid state and later combined with the developed inverse analysis to estimate the specific heat function over the phase change transition. Obtained results are compared to those obtained with the DSC facilities and an acceptable agreement between the two approaches is observed. The experiment was found to be well designed and the collected measurements trustworthy and complementary to handle this important estimation problem.
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hal-04591097 , version 1 (22-07-2024)

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Elodie Courtois, Patrick Glouannec, Anthony Magueresse, Tahar Loulou. Estimating thermal properties of phase change material from heat flux measurements. International Journal of Thermal Sciences, 2022, 172, ⟨10.1016/j.ijthermalsci.2021.107307⟩. ⟨hal-04591097⟩
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