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作者:

Zhang, Xiaopan (Zhang, Xiaopan.) | Lu, Yuanwei (Lu, Yuanwei.) (学者:鹿院卫) | Yu, Qiang (Yu, Qiang.) | Wu, Yuting (Wu, Yuting.) (学者:吴玉庭) | Zhang, Cancan (Zhang, Cancan.)

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EI SCIE

摘要:

Molten salts are widely applied as heat transfer and thermal storage medium for solar thermal power. In order to research the effect of preparation conditions and the types of nanoparticles on the thermophysical properties of molten salt nanocomposite, different molten salt nanocomposites were developed by mixing the nitrates (Ca (NO3)2·4H2O–KNO3–NaNO3–NaNO2) with 1.0 wt% of SiO2, MgO, TiO2 and CuO nanoparticles using a microwave method, which was a new preparation process of molten salt nanocomposite based on high temperature mixing without water. The effect of different microwave heating temperature (250, 350 and 450 °C) and heating time (30, 60, 90 and 120 min) were experimentally studied. The melting point, latent heat and specific heat of the samples were analyzed by differential scanning calorimeter (DSC). The morphology was observed by scanning electron microscope (SEM). The results showed that the nanoparticles induced a decrease of the melting point of 0.1–2.4% while the latent heat decreased by 3.3–7.9%. Compared with other molten salt nanocomposites, the molten salt with the addition of SiO2 nanoparticles had the biggest increase in specific heat, which increased by 7.7% in solid state and 21.0% in liquid state after heating for 90 min at 250 °C. The total heat storage density could reach to 783.0 J/g between 30 and 500 °C, which was 13.3% higher than the base salt. In addition, according to the morphology of the samples, network nanostructures were observed in the molten salt nanocomposite doped with SiO2. © 2020 Elsevier B.V.

关键词:

Calcium compounds Copper oxides Differential scanning calorimetry Dye-sensitized solar cells Fused salts Heat storage Latent heat Magnesia Melting point Microwave heating Mixing Morphology Nanocomposites Nanoparticles Oxide minerals Potash Potassium Nitrate Scanning electron microscopy Silica Silica nanoparticles Silicon SiO2 nanoparticles Sodium nitrate Specific heat TiO2 nanoparticles Titanium dioxide

作者机构:

  • [ 1 ] [Zhang, Xiaopan]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing; 100124, China
  • [ 2 ] [Lu, Yuanwei]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Yu, Qiang]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing; 100124, China
  • [ 4 ] [Wu, Yuting]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing; 100124, China
  • [ 5 ] [Zhang, Cancan]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing; 100124, China

通讯作者信息:

  • 鹿院卫

    [lu, yuanwei]moe key laboratory of enhanced heat transfer and energy conservation, beijing key laboratory of heat transfer and energy conversion, beijing university of technology, beijing; 100124, china

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来源 :

Solar Energy Materials and Solar Cells

ISSN: 0927-0248

年份: 2021

卷: 220

6 . 9 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:8

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WoS核心集被引频次: 0

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