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Enveloppe hybride pour bâtiment à haute performance énergétique

Abstract : This work lies within the framework of low energy consumption building envelope. A new concept of hybrid envelope is proposed: in winter, space heating is ensured by thermal solar air collectors associated with inertial panels (containing phase change materials). The air flows into cavities located all around the envelope, and brings the collected energy to the inertial panels. In summer, overheat absorbed by inertial panels is discharged at night with an over-ventilation through the cavities, in an open loop configuration. A global analytical model was developed in the TRNSys environment. An instrumented experiment is realized in real size test cell (40m3) to study the physics of the envelope, and to validate the model in natural and forced convection. A specific rig is held for the phase change materials. The influences of the natural convection within the liquid phase are highlighted, as well as the variability of the phase transition characteristics with various boundary conditions. The most important parameters are identified using a global sensitivity analysis method (FAST). Parametric studies show the interest of such a system: reductions from 30% to 50% are obtained on heating loads; the number of overheating hours is clearly reduced and even cancelled. For equivalent loads, 1cm thickness of inertial panels is enough for latent heat storage, against 5 to 8cm for sensible heat storage, according the climate.
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Submitted on : Friday, January 25, 2008 - 11:44:12 AM
Last modification on : Saturday, October 23, 2021 - 4:07:24 AM
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  • HAL Id : tel-00217686, version 1




Xavier Faure. Enveloppe hybride pour bâtiment à haute performance énergétique. Energie électrique. Université Joseph-Fourier - Grenoble I, 2007. Français. ⟨tel-00217686⟩



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