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作者:

Sang, Lixia (Sang, Lixia.) (学者:桑丽霞) | Ai, Wenming (Ai, Wenming.) | Wu, Yuting (Wu, Yuting.) (学者:吴玉庭) | Ma, Chongfang (Ma, Chongfang.)

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摘要:

CTernary carbonate (K2CO3-Li2CO3-Na2CO3, 4:4:2 mass ratio) can be used as a high-temperature heat transfer and thermal storage medium in concentrated solar power systems. Ternary carbonate nanofluids with 1.0 wt% SiO2 nanoparticles were prepared by mechanical mixing at high temperatures in order to enhance the specific heat capacity and the thermal conductivity. The effects of stirring rate (500 rpm, 750 rpm, and 1000 rpm) and stirring time (15 min, 30 min, and 60 min) on the thermal properties of the as-prepared nanofluids were analyzed. The results showed that the dispersion homogeneity of the nanoparticles in the nanofluids varied with the stirring rate and the mixing time, thereby affecting the formation of special nanostructures. The maximum enhancements in specific heat capacity and thermal conductivity at a temperature of 540 degrees C, stirring rate of 750 rpm and stirring time of 30 min were 38.5% and 50%, respectively. The specific heat capacity of the optimal nanofluids had no significant deterioration after the thermostatic (at 600 degrees C for 150 h) and thermal shock (50 cycles) experiments were conducted.

关键词:

High temperature melting method Ternary carbonate nanofluids Specific heat capacity Thermal stability Thermal conductivity

作者机构:

  • [ 1 ] [Sang, Lixia]Beijing Univ Technol, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Sang, Lixia]Beijing Univ Technol, Key Lab Heat Transfer & Energy Convers, Beijing Municipal, Coll Environm & Energy Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • 桑丽霞

    [Sang, Lixia]Beijing Univ Technol, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ, Beijing 100124, Peoples R China

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来源 :

SOLAR ENERGY MATERIALS AND SOLAR CELLS

ISSN: 0927-0248

年份: 2019

卷: 203

6 . 9 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:211

JCR分区:1

被引次数:

WoS核心集被引频次: 23

SCOPUS被引频次: 24

ESI高被引论文在榜: 0 展开所有

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