Contribution du rayonnement au confort thermique et aux économies d'énergie dans l'habitat

Abstract : In order to reduce building's energy consumption, radiant heater seems particularly attractives because they didn't require to heat the air of the room to be perceived (less energy spent and less losses), and because they provide a better reactivity to users life rythmes. Moreover, experiences of the MIT showed that we prefer a fresh ai with warm wall rather than the opposite. The goal of the work is to develop a tool to study the link between the radiant energy exchange by an occupant with his environment and the thermal comfort express under some hypothesis, radiative beat transfers can be idealized by the radiosity equation. This one needs the evaluation of geometrics couplings between the elements of the scene called form factors or view factors. It's generally hard to get them, especially when there are obstructions. A comparison of existing numerical methods is proposed. beyond the evaluation of those factors, the algebraic system is heavy to solve because each surface interact, usually, with all the others and because the number of nodes required for the description of a complexe scene is important. We present a resolution method which refine the mesh of the scene while constructing a multi scale representation of form factors between its elements, in order to don't have to compute all the transfers at the finest resolution. This drastically reduce the computation time and allow to use this method in a industrial development process.When the radiative transfers between the occupant, heaters and differents elements of the environment are known, the thermal comfort model of fanger is used to determine if the considered env!ronments are confortable or not, according to international standards. This way, we could find which type of heaters are the most subject to provide thermal comfort without increasing energy consumption.
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-01699156
Contributor : Abes Star <>
Submitted on : Friday, February 2, 2018 - 9:58:34 AM
Last modification on : Tuesday, June 4, 2019 - 6:22:06 PM
Long-term archiving on : Thursday, May 3, 2018 - 12:34:20 AM

File

2017ESMA0029_le_bohec.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01699156, version 1

Collections

Citation

Mickaël Le Bohec. Contribution du rayonnement au confort thermique et aux économies d'énergie dans l'habitat. Autre. ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechique - Poitiers, 2017. Français. ⟨NNT : 2017ESMA0029⟩. ⟨tel-01699156⟩

Share

Metrics

Record views

284

Files downloads

777