Thermal and hygric assessment of an inside-insulated brick wall: 2D critical experiment and computational analysis

Author:

Kočí Václav1,Kočí Jan1,Maděra Jiří1,Pavlík Zbyšek1,Gu Xianglin2,Zhang Weiping2,Černý Robert1

Affiliation:

1. Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Prague, Czech Republic

2. Tongji University, Shanghai, P.R. China

Abstract

A combined experimental-computational approach is used for the analysis of hygrothermal performance of a brick wall provided with interior thermal insulation system. A 2D laboratory experiment is performed to determine temperature and moisture fields in a characteristic segment of the envelope over a sufficiently long period including cold winter months. Then, a computational model of moisture and heat transport is developed, using an integral two-phase balance equation capable of distinguishing between the particular phases of water and an enthalpy-based heat balance equation. A 2D computational representation of the experiment is used for model calibration and identification of unknown parameters, resulting in a very good agreement of experimental and calculated fields, with R2 between 0.9687 and 0.9888. The calibrated model is subsequently used for a long-term hygrothermal assessment of the studied detail to demonstrate the functionality of the interior thermal insulation system, as well as the applicability of the developed model.

Publisher

SAGE Publications

Subject

General Materials Science,Building and Construction

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