期刊
APPLIED THERMAL ENGINEERING
卷 111, 期 -, 页码 1517-1522出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2016.07.159
关键词
Nanoparticles; Molten salts; Specific heat capacity; Molecular dynamics simulation
资金
- EPSRC
- Engineering and Physical Sciences Research Council [EP/K002252/1] Funding Source: researchfish
- EPSRC [EP/K002252/1] Funding Source: UKRI
This work presents both simulations and experiments showing that the use of silica nanoparticles enhances the thermal properties of molten salt based nanofluids which is a provisional candidate for solar thermal energy storage. Sodium nitrate, potassium nitrate and lithium nitrate were chosen as the base material for such nanofluids. Thermodynamic and transport properties for nitrate salts and nanofluids were computed from molecular dynamics simulations. In order to validate our simulation results, different scanning calorimetry (DSC) was employed to measure the thermal properties of salt based nanofluids at 270-400 degrees C. Both simulation and experimental results showed that the addition of nanoparticles increases the specific heat capacity. Material characterization analysis was carried out to investigate microstructural change of nanomaterials using a scanning electron microscopy (SEM). We observed a stripe-like arrangement of nanoparticles with SEM. That may be responsible for the enhancement of specific heat capacity of the nanofluids. (C) 2016 Elsevier Ltd. All rights reserved.
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