Category: Transient Plane Source
Author(s): Abdullah Al Ashraf
Keywords: current, double spiral, Electrically conducting, fluids, insulating material, Kapton, Liquids, nano-composites, nickel, Powders, Sensor, Solids, Temperature, temperature resistance, Thermal characterization, Thermal Conductivity, Thermal Diffusivity, Transient plane source (TPS), transient thermal transport measurements, Volumetric Heat Capacity
Abstract: The purpose of this study is to demonstrate the ability of a transient plane source (TPS) method to measure thermal conductivity, thermal diffusivity, and volumetric heat capacity. Four samples were tested standard steel, linear low-density polyethylene (LLDPE), LLDPE with 5 wt% graphite composite, and LLDPE with 15 wt% graphite composite. Steel had the highest thermal conductivity because steel has more free electrons then the other materials. LLDPE had a lower thermal conductivity because it has strong C-H bonds and no free electrons. LLDPE with 5 and 15 wt% graphite had higher Thermal conductivities then LLDPE because the added graphite is very conductive. Steel had the highest thermal diffusivity. LLDPE and LLDPE with 5 wt% graphite both have very low thermal diffusivities, but there is a large increase once 15 wt% is added. The LLDPE with 15 wt% graphite added had the highest volumetric heat capacity, but this should not be the case. This could have been caused by sample adjustment, or higher measurement time then steel and 15 wt% graphite LLDPE.