Étude de l'influence de l'inertie thermique sur les performances énergétiques des bâtiments

Abstract : Being highly insulated, low energy buildings are very sensitive to variable solar and internal gains. In this context, thermal mass is useful by storing surplus energy and reducing temperature variation, thus improving thermal comfort.Assessing energy, environmental and thermal comfort performances requires reliable building dynamic thermal simulation (DTS) tools. Historically, model developers have tried to find a fair-trade between accuracy and simulation efficiency within a fit-to-purpose philosophy. Simplifying assumptions have therefore been integrated into DTS tools and have a close relation with thermal mass. The validity of such assumptions, for instance constant interior convective and infrared radiative superficial exchange coefficients, or fixed distribution of solar gains transmitted through windows, particularly need to be reassessed in the case of high performance buildings.A first comparison between detailed and simplified models has been performed according to the "BESTEST", integrating also international DTS reference tools (EnergyPlus, ESP-r, TRNSYS). Similar work, but using uncertainty and sensivitivity methods has been carried out using experimental measurements on a passive building (INCAS platform in Chambéry). The results show a trend for the detailed models studied here to estimate lower heating and cooling loads. Furthermore, it seems that these detailed models don't contribute to reduce significantly discrepancies between simulations and measurements.
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Fabio Munaretto. Étude de l'influence de l'inertie thermique sur les performances énergétiques des bâtiments. Autre. Ecole Nationale Supérieure des Mines de Paris, 2014. Français. ⟨NNT : 2014ENMP0011⟩. ⟨pastel-01068784⟩

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