Développement de nouveaux bétons ''accumulateurs d'énergie'' : investigations expérimentale, probabiliste et numérique du comportement thermique

Abstract : The thermal policies have been kept to fit the new economic in a global context particularly in terms of buildings energy efficiency. To meet these challenges, different technologies have been used such as the Phase Change Materials (PCMs) which have the ability to store and release energy. PCMs are generally used with conventional building materials in order to improve their thermal inertia and provide better comfort to users. To enhance the properties of the final composite, the PCMs thermo-physical properties must be sufficiently controlled. In this context, this thesis is a contribution aimed to develop specific methodologies for better characterization of PCM and PCM-concrete. Different experimental approaches will be presented for the identification of PCMs thermophysical properties and to identify the effect of the incorporation and the damage of these materials on the thermal and mechanical properties of concrete. A multiscale modelling considering the average of experimental thermal properties was applied to predict the thermal behaviour of PCMs-concrete. A probabilistic study of experimental uncertainties will be also conducted to assess the level of confidence of the impact of PCM on the thermodynamic properties of PCM-concrete. A numerical study was conducted using experimental data to study the heat transfer through a PCM-concrete wall
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Sarra Drissi. Développement de nouveaux bétons ''accumulateurs d'énergie'' : investigations expérimentale, probabiliste et numérique du comportement thermique. Matériaux. Université Paris-Est, 2015. Français. ⟨NNT : 2015PESC1098⟩. ⟨tel-01271597⟩

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