Quad Flat Non-Lead (QFN) devices are sensors used in building designs to control electronic equipment. The temperature of the QFN sometimes exceeds its maximum threshold, which this is primarily due to the encapsulating resin. In this study, the thermal conductivity of the resin was tested for the QFN16b, QFN32b, and QFN64b using the Transient Plane Source (TPS). Power levels between 0.1 W and 1.0 W were administered through the ...
H2O/KCOOH (potassium formate) is a highly soluble hygroscopic salt solution that has the potential to be used as a desiccant. However, the thermophysical properties of H2O/KCOOH are only available for concentrations between 20-50%, which is not beneficial for their use as dehumidifiers. In this paper, a TPS system was used to measure the thermal conductivity of H2O/KCOOH solution with salt concentrations of 60-80% between 1 °...
Many conventional fluids have low thermal conductivities. Adding thermally conductive nanometer-sized particles to these fluids transforms them into thermally conductive nanofluids. In this study, the thermal conductivity of aqueous alumina and multi-walled carbon nanotube (MWCNT) nanofluids was measured using the transient plane source (TPS) method with a thermal constants analyzer TPS. During each trial, 0.015 W of power were administered to each sample for two seconds. Results of the experiment showed ...
Titanium is used in surgical tools and bone implants because it is strong, has a low density, is resistant against corrosion, and most importantly has a high biocompatibility which reduces the risk of implant rejection. The Transient Plane Source (TPS) method was used to generate a temperature difference curve comparing 2 x 2 inch electrospun coated sheets of Titanium to bone. Results showed that Titanium had a higher thermal conductivity than bone, ...
This article reviewed the methods that are available to test thermal properties of various insulating materials. These methods can fall under one of two categories: steady state techniques and non-steady (transient) techniques. The transient plane source (TPS) method is classified as a non-steady state technique. The TPS sensor is a round piece of engraved nickel that conducts electrical currents and is covered with a coating of Kapton, Mica or Teflon. ...
