Thermal Conductivity Modeling of Building Facade Materials

摘要

An experimental research has been conducted to assess the thermo-physical properties of three building materials in both dry and moist state: beech wood, autoclaved aerated concrete and brick. The objectives of the paper envisage the measurement of the thermal conductivity of these materials through an unsteady state method. The experimental method used in determining the thermal conductivity is based on the principle of temperatures at the interface of two homogeneous semi-infinite bodies of previously altogether different temperatures. The advantage that this method provides lies mainly in the simplicity of findings and the quickness of test runnings. The experimental tests have been accomplished by numerical modeling by means of a computational program based on the finite element method (FEM). The latter have been conducted bidimensionally, under transient state conditions for different lengths of the three materials in dry state. The numerical and experimental results have shown a good agreement for the temperature of the contact area.