Determination of Thermophysical Properties of Insulating Material from Transient Data

The results of an experimental study concerning the determination of thermophysical properties of thermal insulators are presented. The temperature-dependent thermal diffusivity and the normalised volumetric heat capacity are simultaneously identified by a measurement of the time-temperature response of the material subjected to a transient heating. Several results related to the European standard reference for thermal conductivity of insulators (resin-bonded glass fibre board BCR 64) are presented and compared with certified data and with a simplified transient technique. A first series of results for EPB (expanded perlite board) is also reported.