INVESTIGATION ON EFFECTIVE THERMAL CONDUCTIVITY OF FOAMS USING TRANSIENT PLANE HEAT SOURCE METHOD

B.Selvakumar, V. Prabhu Raja, A. P. Senthil Kumar, P. Karthikeyan

Abstract: Thermal Probe Method (TPM) using transient plain source widely used to determine the effective thermal conductivity (ETC) of two phase materials. In this method, ETC of sample is determined by varying the concentration by varying thickness of the sample. The heating coil supplied with DC power is the source of heat which is in contact with surface of the sample. It is heated to temperature range between 80°C - 90°C and temperature is measured using J-type of thermocouple which is contact with the centre of the heating coil. The raise in temperature has been recorded for every 2 seconds by using LabVIEW and data acquisition system (DAQ) which is interfaced with the computer. The calculation has been made by Fourier law of heat conduction and thermal conductivity are obtained for different samples. The result shows that the increase in concentration of the material results in increase in thermal conductivity

Keywords: Transient plain heat source; Effective thermal conductivity; Two phase materials; Concentration

DOI: https://doi.org/10.15623/ijret.2014.0323053