Category: Transient Line Source
Keywords: Needle Probe Method, pre-drilled hole, probe, Rock, Soil, Thermal Conductivity, Thermal Conductivity Measurement, thermal conductivity testing, thermally conductive grease, TLS, Transient Line Source
Abstract: The transient line source probe needle has become a very common tool for measuring the thermal conductivities of soils and some rocks. However, field measurements using this technique can be difficult with densely packed soil and rock, as the process of inserting the probe can disturb the surrounding sample or damage the equipment. This article investigates the effects of drilling a hole filled with thermally conductive grease for the probe to be inserted into. It is found that this proposed method is viable, as it gives accurate and reliable measurements of thermal conductivity.
Reference: October 2016 Energies 9(10):846