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Physics   > Home   > Entropy: Thermodynamics – Energy – Environment – Economy   > Issue 4   > Article

In situ measurement of the heat transfer coefficient on a building wall surface: h-measurement device based on a harmonic excitation

Mesure in situ du coefficient d’échange sur une paroi de bâtiment : système basé sur une excitation harmonique


Adrien François
Univ Paris Est Creteil

Laurent Ibos
Univ Paris Est Creteil

Vincent Feuillet
Univ Paris Est Creteil

Johann Meulemans
Saint-Gobain Research Paris



Published on 7 July 2020   DOI : 10.21494/ISTE.OP.2020.0547

Abstract

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This paper presents a novel in situ measurement method of the total heat transfer coefficient on a building wall. The device developed is based on harmonic thermal load of the wall surface. In situ tests of the method were performed in a steady environment as well as in off-equilibrium conditions (generated using electrical heaters). The heat transfer coefficient was estimated to 7.5 and 9 W.m−2.K−1 respectively. A parametric analysis allows determining the optimum operating conditions. The results obtained were in good agreement with standard values found in the literature. Measurement uncertainties were evaluated and a simple analytical model of the device was also developed.

This paper presents a novel in situ measurement method of the total heat transfer coefficient on a building wall. The device developed is based on harmonic thermal load of the wall surface. In situ tests of the method were performed in a steady environment as well as in off-equilibrium conditions (generated using electrical heaters). The heat transfer coefficient was estimated to 7.5 and 9 W.m−2.K−1 respectively. A parametric analysis allows determining the optimum operating conditions. The results obtained were in good agreement with standard values found in the literature. Measurement uncertainties were evaluated and a simple analytical model of the device was also developed.

in situ measurements heat transfer coefficient harmonic thermal quadrupoles buildings

in situ measurements heat transfer coefficient harmonic thermal quadrupoles buildings