An efficient and simple method for investigating dynamic heat transfer in multilayered building components
by Emilio Sassine; Yassine Cherif; Emmanuel Antczak; Joseph Dgheim
International Journal of Masonry Research and Innovation (IJMRI), Vol. 7, No. 3, 2022

Abstract: The thermal parameters of building envelopes are crucial information for performing proper building energy simulation, economic optimisation, and suitable energy efficiency measures for existing buildings. However, most of the existing building characterisation methods require heavy and costly instrumentation equipment as well as relatively long monitoring duration. This paper proposes two new methods for determining the thermal properties of the multilayered building walls: the first method allows the determination of the dynamic thermal properties of each layer separately, while the second method considers an equivalent one-layer homogeneous wall. The two methods are validated using a heating box experimental device with a difference of about 4% for λ and 10% for (ρCp). Afterwards, a building numerical model is used to compare the two methods showing that the equivalent building components (walls, roofs, and slabs) can be used as accurate and reliable approach for simplifying the difficulty and complexity of thermal identification of multilayered building walls.

Online publication date: Fri, 29-Apr-2022

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