In the past twenty years, the behavior of the apparent thermal conductance of two or three phase systems comprised of solid particles with nanometer dimensions suspended in fluids, dubbed nanofluids, has been greatly contested in literature. After the study of the seven simplest nanofluids, Cu, CuO, Al2O3, and TiO2 suspended in water and ethylene glycol, ...
This paper aimed to measure the thermal conductivity of pure eicosane, eicosane-CuO and eicosane-MWCNTs solid composites. A Thermal Constants Analyzer measured the thermal conductivity of the nanostructure-enhanced PCMs using the transient plane source (TPS) method. Results showed that the thermal conductivity increased rapidly as the temperature of the solid composites approached the melting point. Additionally, the samples that were solidified in an oven, and the eicosane-MWCNT samples experienced the largest ...
The authors present a new (at the time) design for the transient hot wire method. Using this method, the thermal conductivity of materials was measured by the slope of a temperature versus time line. The instrument can measure temperatures between 20°C and 200°C with pressure as low as 10 mTorr. The presented method gave good accuracy and precision....
With the use of multiple thermal instruments, the thermal conductivity (lambda) of fibrous insulations was measured in the plane direction. In this study, a method was put forth the estimate thermal conductivity. This method assumed that the thermal conductivity of the anisotropic material was equivalent to that of an isotropic material with identical bulk density and specific heat. This novel method displays the thermal conductivity of the anisotropic material as √(...
