Lanzhou University of Technology Institutional Repository （LUT_IR）
| Enhanced heat conduction in molten salt containing nanoparticles: Insights from molecular dynamics | |
| Li, Zhao1; Cui, Liu1; Li, Baorang1; Du, Xiaoze2 | |
| 2020-06 | |
| Source Publication | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
 |
| ISSN | 0017-9310 |
| Volume | 153 |
| Abstract | The addition of nanoparticles is a promising strategy to manipulate the thermal transport property of molten salt, which is an important thermal energy storage material for concentrating solar power. The molecular dynamics simulations have been conducted to investigate the mechanisms of enhanced heat transfer in binary molten salt based nanocomposite with nonmetallic nanoparticle SiO2. The results show that the thermal conductivity of molten salt is increased by introducing nanoparticles, which is up to 54.5% increase under 10%wt. loading of SiO2 nanoparticle. Moreover, the thermal conductivity increases as the nanoparticle loading rises. To elucidate the underlying mechanisms for the enhancement of thermal conductivity, the mean square displacement and size effect of nanoparticle, the structure and density of the ordered layer were analyzed. It is found that the possible mechanisms, including the Brownian motion of nanoparticle, the micro-convection of base fluid, and the ordered layer at the solid-liquid interface, for enhanced heat transfer proposed in previous literatures cannot explain the change in thermal conductivity of molten salt. The increment in thermal conductivity can be attributed to the improved probability and frequency of ion collision, as evidenced by the change of potential energy. The present findings verify the applicability for the molten salt-nanoparticle composite, moreover, highlight the correlation between the potential energy and the enhancement of thermal conductivity, which may provide guidance on the chosen of materials and design of the molten salt-nanoparticle composite. (C) 2020 Elsevier Ltd. All rights reserved. |
| Keyword | Solar salt Nanoparticle Thermal conductivity Potential energy Molecular dynamics |
| DOI | 10.1016/j.ijheatmasstransfer.2020.119578 |
| Indexed By | SCI ; SCIE |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51676069][51806064 and51741604] ; Fundamental Research Funds for the Central Universities[2018QN034] |
| WOS Research Area | Thermodynamics ; Engineering ; Mechanics |
| WOS Subject | Thermodynamics ; Engineering, Mechanical ; Mechanics |
| WOS ID | WOS:000530718200044 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| EI Accession Number | 20201008254900 |
| EI Keywords | Thermal conductivity of solids |
| EI Classification Number | 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 641.1 Thermodynamics - 641.2 Heat Transfer - 657.1 Solar Energy and Phenomena - 761 Nanotechnology - 801.4 Physical Chemistry - 804.2 Inorganic Compounds - 931.3 Atomic and Molecular Physics - 933 Solid State Physics |
| Document Type | 期刊论文 |
| Identifier | https://ir.lut.edu.cn/handle/2XXMBERH/76501 |
| Collection | 兰州理工大学 能源与动力工程学院 |
| Corresponding Author | Cui, Liu; Du, Xiaoze |
| Affiliation | 1.North China Elect Power Univ, Minist Educ, Key Lab Power Stn Energy Transfer Convers & Syst, Beijing 102206, Peoples R China 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China |
| Corresponding Author Affilication | Coll Energy & Power Engn |
| Recommended Citation GB/T 7714 | Li, Zhao,Cui, Liu,Li, Baorang,et al. Enhanced heat conduction in molten salt containing nanoparticles: Insights from molecular dynamics[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2020,153. |
| APA | Li, Zhao,Cui, Liu,Li, Baorang,&Du, Xiaoze.(2020).Enhanced heat conduction in molten salt containing nanoparticles: Insights from molecular dynamics.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,153. |
| MLA | Li, Zhao,et al."Enhanced heat conduction in molten salt containing nanoparticles: Insights from molecular dynamics".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 153(2020). |
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