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Contribution à l'Etude des Parois Complexes en Physique du Bâtiment : Modélisation, Expérimentation et Validation Expérimentale de Complexes de Toitures incluant des Produits Minces Réfléchissants en climat tropical humide

Abstract : Bio-climatic design of building envelopes is of great importance when dealing with energy savings and thereby constitutes an essential issue. It necessitates the energy performance knowledge of envelope and system components and aims at avoiding the need for heating or cooling devices, highly energy-consuming. In this framework, passive technologies are entirely indicated, as they allow to regulate the thermal behaviour of buildings by using natural means, without supplementary energy contribution. Complex walls are an example, and can be defined as an assembly of materials, separated by one or several air layers. We are interested in these works in a typical complex wall, including a radiant barrier (RB). RB are used in thermal building insulation and consist of a thin sheet or coating of a highly reflective material, usually aluminium, applied to one or both sides of a number of substrates materials. Because of their thermophysical properties and their thickness, these products are not all included in the thermal insulation definition, according to the French norm NF-P-75-101. The main consequence is that their thermal performances are not certified. In addition, their placement in a wall requires the presence of one or several air layers, contiguous to the reflecting faces. The wall thus constituted is a complex wall,in which a coupled energy transfer occurs. In order to improve the knowledge of the thermal behaviour of a such wall, it is necessary to elaborate a convenient mathematical model. Preceding remarks illustrate the French problematic around RB, with two aspects: the first one is related to their field performances and the second to research purposes. To point out elements of answer, a methodology in two parts is proposed. The first is experimental and consists in the determination of the thermal characteristics of a complex roof including a RB, from data obtained using an experimental platform in field conditions ; the second deals with the mathematical modelling of a complex roof with a dedicated prototype of building simulation code. The two parts are combined in an experimental validation step, leading to the evaluation of the predictions of the simulation code with respect to experimental data.
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https://tel.archives-ouvertes.fr/tel-00463069
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Submitted on : Thursday, March 11, 2010 - 9:36:45 AM
Last modification on : Tuesday, October 20, 2020 - 3:05:06 AM
Long-term archiving on: : Wednesday, November 30, 2016 - 2:57:09 PM

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  • HAL Id : tel-00463069, version 1

Citation

Frédéric Miranville. Contribution à l'Etude des Parois Complexes en Physique du Bâtiment : Modélisation, Expérimentation et Validation Expérimentale de Complexes de Toitures incluant des Produits Minces Réfléchissants en climat tropical humide. Sciences de l'ingénieur [physics]. Université de la Réunion, 2002. Français. ⟨tel-00463069⟩

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