Thermal Characterization of Building Walls Under Random Boundary Conditions

Abstract This work aims to improve the knowledge on dynamic thermophysical characterization of building envelopes by comparing three numerical methods applied an experimental wall made masonry brick. The thermal conductivity λ and capacity ρCp are determined performing a data fitting optimization between measurements heat flux resulting from these models. device consists box with controlled ambiance through radiator linked thermostatic bath placed inside box, opposite side facing wall. Three different were examined: transfer matrix (HTM) analytical method using HTM, finite element (FEM) comsol multiphysics® software, simulation model (BSM) trnsys® Type 56 coupled Genopt® tool. reproducibility was also validated two other datasets (one random one harmonic). obtained results satisfactory for both studied deviations less than 5% methods. logging duration boundary conditions found be around five days while in harmonic sufficient solution converge.