Verification of computational model for the assessment of interior thermal insulation systems using a laboratory critical experiment

Abstract

Unlike exterior thermal insulation systems, the interior ones require specific treatment as they might expose masonry to frost damage, mold growth, salt efflorescence, or other damage patterns that can limit the service life. Computational modeling belongs to effective tools which can be used for assessment of building segments performance without necessity of the segments to be built. However, a verified mathematical model is a key factor that ensures the results obtained will be accurate enough. In this paper, a verification procedure of a mathematical model for description of coupled heat and moisture transport is presented. Comparing temperature profiles obtained using a laboratory critical experiment and its computational representation, the applicability of the model is demonstrated. Two segments of masonry with and without thermal insulation system are selected for the analyses. In both cases, the root mean square error is less than 0.325 °C which confirms a high level of the model's accuracy and enables its possible application at the assessment of performance of interior thermal insulation systems.