Simulation and experimental study of the specific heat capacity of molten salt based nanofluids

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• 作者：Geng Qiao^a ; ^{G.QIAO.Z@gmail.com} ; Mathieu Lasfargues^a ; ^{M.LASFARGUES@outlook.com} ; Alessio Alexiadis^b ; ^{A.ALEXIADIS@bham.ac.uk} ; Yulong Ding^a ; ^{Y.DING@bham.ac.uk}
• 关键词：Nanoparticles ; Molten salts ; Specific heat capacity ; Molecular dynamics simulation
• 刊名：Applied Thermal Engineering
• 出版年：2017
• 出版时间：25 January 2017
• 年：2017
• 卷：111
• 期：Complete
• 页码：1517-1522
• 全文大小：1581 K
• 卷排序：111

文摘

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 °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.