Thermal Constants Analysers are designed to test three-dimensional samples with sizes at least as large as the sensor itself. However, this study examines the possibility of using methods to test the thermal conductivity of thin solid samples when they are thermally insulated. To accomplish this, the 200 data points that are collected by TPS methods should be collected while the sample is heated for only 5 seconds, which is a shorter amount ...
The aim of this study was to determine whether steady-state methods were better at measuring thermal conductivities of oven-fired clay masonry materials than transient methods, and vice versa. The Transient Plane Source (TPS) Method was tested, and when the results were compared with the other transient methods, there was an agreement of better than +/-3%. Overall, the thermal conductivity values recorded for the transient methods were higher than when the ...
Many conventional fluids have low thermal conductivities. Adding thermally conductive nanometer-sized particles to these fluids transforms them into thermally conductive nanofluids that can be used for refrigeration and air conditioning systems. In this paper, the transient plane source (TPS) method is used to explore the thermal conductivity of multi-walled carbon nanotube (MWCNT) nanofluids in a helically coiled, double-pipe heat exchanger. The thermal conductivities of the MWCNT nanofluids were measured using ...
Phase change materials (PCMs) are substances that release large amounts of energy in the form of latent heat when they freeze. Paraffin waxes have many of the desired characteristics PCMs exhibit except that they have low thermal conductivity. In this experiment, Alumina and Carbon Black nanoparticles were added to two types of paraffin waxes (melting points of 20-25 °C) to increase their thermal conductivity. A Transient Plane Source (TPS) measured ...
Plasters have many applications such as increasing the thermal resistance of walls, moderating humidity, and maintaining indoor air quality. In this study, the hygrothermal properties of two types of plaster were tested. The thermal conductivity and thermal diffusivity of the plaster samples were measured using the transient plane source (TPS) method at 23 °C. Results showed that the plaster with lower density and higher porosity had the lowest thermal conductivity....
