The aim of this work was the development of a phase change material using nanoparticles embedded in a molten salt base material and the thermal characterization of the nanofluid obtained. This can be used in a concentrating solar plants with a reduction of storage material if an improvement in the specific heat is achieved. Different kind of nanoparticles (1%wt) were dispersed in potassium and sodium nitrates (60:40 ratio) to obtain high temperature nanofluids. The nanoparticles added were: silica, alumina, 14%alumina-86%silica and titania. DSC analysis showed that the addition of nanoparticles to base salt increases the Cp of 15-57% in solid phase and of 1-22% in liquid phase. The higher increase of Cp was obtained with Aerosil COK84. SEM suggests an greater interaction between these nanoparticles and the salt.
Phase change materials based on molten salts and nanoparticles for thermal energy storage
CHIERUZZI, Manila;KENNY, Jose Maria
2013
Abstract
The aim of this work was the development of a phase change material using nanoparticles embedded in a molten salt base material and the thermal characterization of the nanofluid obtained. This can be used in a concentrating solar plants with a reduction of storage material if an improvement in the specific heat is achieved. Different kind of nanoparticles (1%wt) were dispersed in potassium and sodium nitrates (60:40 ratio) to obtain high temperature nanofluids. The nanoparticles added were: silica, alumina, 14%alumina-86%silica and titania. DSC analysis showed that the addition of nanoparticles to base salt increases the Cp of 15-57% in solid phase and of 1-22% in liquid phase. The higher increase of Cp was obtained with Aerosil COK84. SEM suggests an greater interaction between these nanoparticles and the salt.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
