This article examined the effects of using the traditional vertical orientation method versus the single-sided horizontal method for transient thermal conductivity measurements of water, glycol, and methanol. It aimed to understand whether the single-sided horizontal method was effective at suppressing the onset of natural convection during the tests. From the analyses, it was seen that the proposed single-sided horizontal method can effectively suppress the onset of natural convection during the ...
This study aimed to develop a new method based on the transient plane source (TPS) technique to simultaneously measure the in-plane and across-plane thermal conductivities of anisotropic insulating materials using one experimental test. It was found from the experimental results of the thermal conductivities of the anisotropic silica aerogel samples that both the in-plane thermal conductivity and cross-plane thermal conductivity increased with increasing the ambient temperature. The results demonstrated that ...
This article examined how a variety of mechanisms (layering, Brownian motion, clustering, ballistic phonon motion, thermal boundary resistance, and mass difference scattering) affect the thermal conductivity of alumina based nanofluid. The thermal conductivity values were found using the transient plane source (TPS) method. It was found that mass difference scattering provided the most effective mechanism for reducing the thermal conductivity of the alumina based nanofluid....
This article studied the potential thermal conductivity deviation of anisotropic materials using a numerical simulation. Anisotropic thermal conductivity may experience deviation due to its noncompliance of the theoretical assumption of the transient plane source (TPS) method. The TPS method was used to measure the in-plane and through-plane thermal conductivities of anisotropic materials where the volumetric heat capacity was known. It was found that the TPS method could be used to ...
Metal hydrides (MHs) have been considered as thermal energy storage (TES) materials for concentrated solar thermal applications. In this study, a TES system based on MgH2 was designed, constructed and optimized. The thermal conductivity of the MgH2/TiB2/ENG powder was measured using the transient plane source technique. It was found that the thermal conductivity of a MgH2/TiB2/ENG pellet pressed at 223 ...
