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This article studied the flow and thermal transport characteristics of a ferrofluid based on transformer oil (Mogul Trafo CZ-A) and iron oxide nanoparticles. The thermal conductivity, specific heat, and thermal diffusivity were calculated using the transient plane source (TPS) method and a thermal constants analyzer was used for performing the measurements. It was found that the presence of the magnetic nanoparticles in the transformer oil (3%) increased its thermal conductivity by about 3.2%.
This article explored the thermal behavior of epoxy nanocomposites containing different types of nanofillers, such as 1-D Multiwall Carbon Nanotubes (MWCNTs) and 2-D predominant shape of Exfoliated Graphite nanoparticles (EG). The thermal conductivity measurements were conducted using a thermal constants analyzer which is based on the transient plane source (TPS) technique. The measurements indicated that better heat conduction is found in epoxy systems loaded with 2-D predominant shape of Exfoliated Graphite (EG) nanoparticles. This is a promising result for overcoming a critical drawback of composite materials that are often characterized by their low thermal conductivity which negatively impacts their use in the design of anti-icing systems.
This article investigates the effects of two types of nanoparticles, OctaMethylOligomericSilsesquioxanes (OMPOSS) and carbon nanotubes (CNTs), in a model epoxy resin. Intumescent phosphorous-based flame-retardant (APP) was also incorporated with the CNTs. Thermal conductivity of nanocomposites was measured using a thermal analyser with the transient plane source method. Epoxy with APP and OMPOSS had increasing thermal conductivity below the glass transition temperature (Tg) but slowed above Tg. When APP and CNTs were combined, CNTs hid the effects of APP, leading to a decrease in thermal conductivity.
With a goal of wider usage of renewable energy sources that are clean and sustainable, effective technologies, such as thermal energy storage (TES), play a vital role in storing thermal energy for future use. In this study, silver nanoparticles were dispersed in paraffin wax, eicosane, as phase change material (PCM). Thermal conductivity was measured following the transient method, using a Thermal Constants Analyzer with transient plane source technique. Thermal conductivity values increased with temperature, and when close to melting point, a sharp rise in thermal conductivity was observed.
