Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6534261 | Solar Energy Materials and Solar Cells | 2018 | 6 Pages |
Abstract
In order to evaluate the effect of nanoparticles on the specific heat capacity of a low-melting-point eutectic quaternary nitrate salt, 1.0â¯wt% SiO2 nanoparticles with an average size of 20â¯nm was doped into the mixed salt Ca(NO3)2·4H2O-KNO3-NaNO3-LiNO3. A mechanical dispersion mixer was developed to prepare molten salt nanofluids. The effects of the mixing time (15, 45, 90, 120, and 150â¯min) and stirring rate (600, 750, and 1000â¯rpm) on the specific heat capacity of the nanofluids were analyzed using a differential scanning calorimeter. The results showed that the specific heat capacity of the nanofluids varied with the mixing time and stirring rate. It increased by ~ 17.0% at a mixing time of 15â¯min and stirring rate of 750â¯rpm. Microstructural characterization of the molten salt nanocomposites was performed using scanning electron microscopy, which showed that special nanostructures, which resemble chain-like nanostructures, were formed on the surface of the solid nanofluids. The special nanostructures with a large specific surface area and high surface energy could increase the specific heat capacity of the molten salt nanofluids.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Weilong Song, Yuanwei Lu, Yuting Wu, Chongfang Ma,