Eenhancing thermal properties of mono and binary nitrates by adding SiO2 nanoparticles

被引：0

作者：

Xiong Y. ^{[1
]}

Wang Z. ^{[1
]}

Xu P. ^{[1
]}

Wu Y. ^{[2
]}

Ding Y. ^{[3
]}

Ma C. ^{[2
]}

机构：

[1] Key Laboratory of HVAC, Beijing University of Civil Engineering and Architecture, Beijing

[2] Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education, Key Laboratory of Heat Transfer and Energy Conservation of Beijing Municipality, Beijing University of Technology, Beijing

[3] Birmingham Center for Energy Storage, University of Birmingham

来源：

Huagong Xuebao/CIESC Journal | 2018年 / 69卷 / 10期

关键词：

Decomposition temperature; Melting latent heat; Nanofluids; Phase-changetemperature; Specific heat capacity; Thermal conductivities;

D O I：

10.11949/j.issn.0438-1157.20180267

中图分类号：

学科分类号：

摘要：

Molten salt as phase change materials can be used as thermal storage medium in concentrating solar power (CSP) system. It is possible to significantly improve the thermal properties of molten salt by adding nanoparticles to molten salt. Nanofluids were synthesized by dispersing 20 nm SiO2 particles to potassium nitrate, sodium nitrate, and solar salt (60% NaNO3 and 40% KNO3, mass fraction) respectively. Nanofluids were prepared by water-solution, sonication, and evaporation. The thermo-physical properties (latent heat, specific heat and molting point) of nonofluidswere characterized by DSC method, and the thermal diffusivity was analyzed by laser flash apparatus (LFA). Results show that mass fraction of 20 nm SiO2 particles significantly enhanced latent heat, specific heat and thermal conductivities of potassium nitrate, sodium nitrate, and solar salt. Compared with base salt, the average specific heat improved of solar salt, potassium nitrate, sodium nitrate with 20 nm SiO2 nanoparticles was found to be 4.7%-15.89%, 3.9%-33.5%, 1.9%-11.86% in liquid, and the maximum thermal conductivity increasedby a maximum of 17.16%, 39.7%, and 9.5%, respectively. © All Right Reserved.

引用

页码：4418 / 4426

页数：8

共 31 条

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