This study highlights the ongoing search for sustainable and thermally suitable phase-change materials (PCMs), for hot weather building climates, such as Iraq. This new PCM must have an extraordinary heat and cold retention ability. Building industries are interested in using paraffin’s in their roofing materials, because of their thermo-physical properties, their profitability to save on electricity and HVAC (heating-ventilating air conditioning) systems, their local abundance, as well as their ...
This article discussed the creation of phase change composite materials using molten binary salts and expanded graphite (EG). Three different salts were used, LiNO3–KCl, LiNO3–NaNO3 and LiNO3–NaCl. The amount of salt in the composites varied between 77.8% and 81.5%. The thermal conductivity of the products was assessed to determine how it was affected by the addition of expanded graphite. The researchers determined that they had increased the thermal conductivity ...
When testing the thermal conductivity of moist specimens, an analysis of heat and mass transfer must be conducted. Thermal conductivity measurements require a temperature gradient within the sample, however when measuring moist materials, the temperature gradient causes the moisture to be transported and dispersed within the material. During testing, phase changes can also be experienced, which may lead to latent heat. For this experiment, the thermal properties of moist autoclaved ...
Expanded graphite (EG) was added to lauric acid (LA)-stearic acid (SA) phase change materials to enhance their thermal conductivities. The PCMs were prepared in varying mass fractions of LA and SA, and 10 wt. % of EG was added. The phase change temperature and phase change enthalpy were determined by DSC, while the thermal conductivities, and thermal stabilities of the PCMs were determined by the transient plane source and thermogravimetric analysis, ...
The ability of Cu-H2O nanofluids to perform as phase change materials (PCMs) is investigated. The supercooling behavior of the nanofluids was determined as a function of copper nanoparticle concentration. The contact angle and thermal conductivity of this PCM were also determined experimentally. Based on the experimental results, the authors conclude that these nanofluids could be useful in thermal energy storage applications....
