EFFECT OF MORPHOLOGICAL AND THERMAL PROPERTIES OF INSULATION CORE TYPE OF SANDWICH PANELS ON THERMAL INSULATION PERFORMANCE IN BUILDING

Numerical modeling study of the thermal behavior of a sandwich panel with different walls morphology is presented with the use of a 3D mesoscopic scale model. The core in sandwich panel is a porous material represented by polyurethane, and the skins are concrete. The numerical homogenization technique was used to the computation of the effective thermal properties of the wall using a VER cell, the first in which the core is normal, the second is zigzag and the last is shaped corrugated. Effect of the thickness of the core and of the skins as well as the volume fraction of the voids in the core was evaluated with the aim of finding the most efficient panel in thermal insulation. Analytical models were used and linked together in order to find the asymptotic analytical model and compare it with the numerical results. We note that the use of different foam is a power tool to reduce the heat transfer in building and constructions and in addition, with different geometrical composition, the comfort energetic in building and house is improved. © 2022, Politechnica University of Bucharest. All rights reserved.