Thermal properties of limestone rock by pulse transient technique using slab model accounting the heat transfer coefficient and heat capacity of heat source

Abstract

The paper aimed to investigate the thermal properties of Limestone rock by the Pulse Transient Technique. using Slab model. This technique helps to measure the thermal conductivity, thermal diffusivity, specific heat capacity and additionally heat capacity of the heat source and the heat transfer coefficient between the plane heat source and sample surface in a single measurement. The experiment is done with dry contact condition in-between plane heat source, thermal sensor, and specimen interfaces. The results obtained from the slab model seem to agree better to the previously reported cuboid model usually used for measurements performed with contact thermal agent. In this paper, we have discussed the Uncertainty analysis of the estimation of the parameters by slab model, done for real measurements conducted for Limestone a rock sample that is derived from sensitivity coefficients theory. The thermophysical parameter of the rock motivates to understand the temperature distribution over time and depth, which also describes its thermal history. Hence the research on rock’s thermal property can be widely used in the geothermal heat flow and storage systems.