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Experimental investigation on stability of thermal performances of Solar Salt based nanocomposite. / Li, Zhao; Li, Baorang; Du, Xiaoze; Wu, Hongwei.

In: Renewable Energy, Vol. 146, 146, 04.07.2019, p. 816-827.

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@article{4d9f2db82279442b8b1e71975af526af,
title = "Experimental investigation on stability of thermal performances of Solar Salt based nanocomposite",
abstract = "It is recognized that the thermal performances of the molten salt based nanocomposite can be significantly enhanced. However, there were rare investigations regarding its stability under practical operating thermal environments. In this study, both of the specific heat capacity and thermal diffusivity of the molten salt based nanocomposite were experimentally evaluated under various operating conditions, including that of exposure to constant high temperature and low-high temperature circulation. The typical solar salt based nanofluid was prepared via the modified two-step method. The selected nanoparticle was SiO2 with an average diameter of 30 nm. Experimental results indicated that both the heat treatments could significantly decrease the thermophysical properties which would result in poor thermal stability. In comparison with the samples exposing to constant high temperature, the thermal cycled samples showed a more stable thermal property. Further investigations on the SiO2 particle morphology transition in the process of the heat treatments revealed that the impact of both temperature field and natural convection on particle agglomeration should be responsible for the decrease in thermophysical properties of nanofluid.",
keywords = "Molten salt, Nanocomposite, Specific heat capacity, Stability, Thermal diffusivity",
author = "Zhao Li and Baorang Li and Xiaoze Du and Hongwei Wu",
note = "{\circledC} 2019 Elsevier Ltd. All rights reserved.",
year = "2019",
month = "7",
day = "4",
doi = "10.1016/j.renene.2019.07.009",
language = "English",
volume = "146",
pages = "816--827",
journal = "Renewable Energy",
issn = "0960-1481",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Experimental investigation on stability of thermal performances of Solar Salt based nanocomposite

AU - Li, Zhao

AU - Li, Baorang

AU - Du, Xiaoze

AU - Wu, Hongwei

N1 - © 2019 Elsevier Ltd. All rights reserved.

PY - 2019/7/4

Y1 - 2019/7/4

N2 - It is recognized that the thermal performances of the molten salt based nanocomposite can be significantly enhanced. However, there were rare investigations regarding its stability under practical operating thermal environments. In this study, both of the specific heat capacity and thermal diffusivity of the molten salt based nanocomposite were experimentally evaluated under various operating conditions, including that of exposure to constant high temperature and low-high temperature circulation. The typical solar salt based nanofluid was prepared via the modified two-step method. The selected nanoparticle was SiO2 with an average diameter of 30 nm. Experimental results indicated that both the heat treatments could significantly decrease the thermophysical properties which would result in poor thermal stability. In comparison with the samples exposing to constant high temperature, the thermal cycled samples showed a more stable thermal property. Further investigations on the SiO2 particle morphology transition in the process of the heat treatments revealed that the impact of both temperature field and natural convection on particle agglomeration should be responsible for the decrease in thermophysical properties of nanofluid.

AB - It is recognized that the thermal performances of the molten salt based nanocomposite can be significantly enhanced. However, there were rare investigations regarding its stability under practical operating thermal environments. In this study, both of the specific heat capacity and thermal diffusivity of the molten salt based nanocomposite were experimentally evaluated under various operating conditions, including that of exposure to constant high temperature and low-high temperature circulation. The typical solar salt based nanofluid was prepared via the modified two-step method. The selected nanoparticle was SiO2 with an average diameter of 30 nm. Experimental results indicated that both the heat treatments could significantly decrease the thermophysical properties which would result in poor thermal stability. In comparison with the samples exposing to constant high temperature, the thermal cycled samples showed a more stable thermal property. Further investigations on the SiO2 particle morphology transition in the process of the heat treatments revealed that the impact of both temperature field and natural convection on particle agglomeration should be responsible for the decrease in thermophysical properties of nanofluid.

KW - Molten salt

KW - Nanocomposite

KW - Specific heat capacity

KW - Stability

KW - Thermal diffusivity

UR - http://www.scopus.com/inward/record.url?scp=85068524823&partnerID=8YFLogxK

U2 - 10.1016/j.renene.2019.07.009

DO - 10.1016/j.renene.2019.07.009

M3 - Article

VL - 146

SP - 816

EP - 827

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

M1 - 146

ER -