Thermal conductivity and thermal diffusivity of two poly(methyl methacrylates) were measured using multiple methods; temperature wave analysis, laser flash, transient plane source, transient line-source probe, and heat flux meter. The main reasoning behind this study was to compare results between methods, to ensure repeatability among methods. Good agreement was shown among thermal conductivity and thermal diffusivity results between instruments, however the transient plane source method repeatedly yielded 6% higher results ...
Author(s): A. Dawson, B. Hay, C. Allen, H. Lobo, J. Morikawa, L. Halldahl, M. Rides
Previously, the thermal conductivity of extruded monoliths, ceramic foams and metal structures were determined for their application as open volumetric receivers in concentrated solar radiation. Volumetric receivers contain a porous material, which is ultimately heated through solar radiation. The pores allow ambient air flow through the material, which will eventually reach a temperature of 700˚C. This heat is then used to feed the steam turbine process. Understanding the effect of ...
Author(s): B. Hoffschmidt, O. Reutter, P. Rietbrock, T. Fend, Thomas Fend
In this article, the thermal conductivity of porous sintered nickel material, filled with water, ethanediol, and glycerin was measured using a transient plane source method. As a note, the thermal performance of the loop heat pipes, is greatly affected by the effective thermal conductivity of the capillary structures. The results were compared with stated literature results and they indicated that the thermal conductivity of the porous material is heavily dependent ...
Author(s): F. Yu, H. Fan, J. Cao, P. Hu, S. Mo, Z. Chen
To evaluate the effect of climate change on the stability of methane hydrates in the seafloor, thermal conductivity measurements were performed in hydrate-bearing sediment. Using the renormalization and labeling technique methods, alongside of a
thermal constants analyzer, the effective thermal conductivity (ETC) of methane hydrate-bearing sand and tetrahydrofuran (THF) hydrate-bearing sand were measured and found to be 1 W/mK and 2 W/mK, respectively. The thermal ...
Author(s): D. Huang, S. Fan
Using magnetic striation and ultrasonic agitation, aluminum nitride particles were dispersed into ethanol. The method was used to measure the thermal conductivities of these aluminum nitride-ethanol nanofluids. Results show about 20 % increase in the thermal conductivity of ethanol and a strong temperature dependence of the thermal conductivity....
Author(s): F. Yu, P. Hu, W. Shan, Z. Chen
