Physics > Home > Entropy: Thermodynamics – Energy – Environment – Economy > Issue 4 > Article
Adrien François
Univ Paris Est Creteil
Laurent Ibos
Univ Paris Est Creteil
Vincent Feuillet
Univ Paris Est Creteil
Johann Meulemans
Saint-Gobain Research Paris
Received: 17 April 2020 / Accepted: 10 June 2020
Published on 7 July 2020 DOI : 10.21494/ISTE.OP.2020.0547
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