Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Estimation of the thermal properties using modal identification method and optimal experiment design applied to historical building walls

Benjamin Kadoch 1, Julien Berger 2
1 Aix Marseille Université, CNRS, IUSTI UMR 7343, 13453, Marseille, France
2 Laboratoire des Sciences de l’Ingénieur pour l’Environnement (LaSIE), UMR 7356 CNRS, La Rochelle Université, CNRS, 17000, La Rochelle, France

Abstract: This article uses a two-step fast and accurate methodology to retrieve the thermal diffusivity of a wall based on in-situ measurement. To cut the computational burden of the inverse problem, the first steps consists in searching the optimal experiment design among the sequence of observations. A reduced sequence of three days is identified guaranteeing to estimate the unknown parameters with maximum accuracy. Then, a reduced order model based on modal identification method is developed to cut the computational cost of the direct problem numerical model. Here the robustness of the a priori reduced order model is evaluated for a case different from the original one used for its construction. The case study is an existing building with wall composed of granite. The efficiency of the approach is evaluated, highlighting very a satisfying reliability of the calibrated model with a computational cost reduced by 5.
Keywords: Parameter estimation problem, Model Calibration, Inverse Heat Conduction Problem, Modal Identification Method, Reduced Order Model
Pages: 2343 - 2350