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Journal of Thermal Science

热科学学报

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2024 , Vol. 33 >Issue 4: 1443 - 1457

DOI: https://doi.org/10.1007/s11630-024-2000-6

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Numerical Study on Heat Transfer and Frictional Resistance of Two Types of Molten Salts in Straight Channels and Supercritical Carbon Dioxide in Airfoil Channels

  • WANG Yanquan ,
  • LU Yuanwei ,
  • GAO Qi ,
  • LI Feng ,
  • MA Yancheng ,
  • WANG Yuanyuan ,
  • WU Yuting
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  • 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

网络出版日期: 2024-07-15

基金资助

This work is supported by the National Natural Science Foundation of China (No. 52076006) and National Key Research and Development Program of China (No. 2022YFB4202402).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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Numerical Study on Heat Transfer and Frictional Resistance of Two Types of Molten Salts in Straight Channels and Supercritical Carbon Dioxide in Airfoil Channels

  • WANG Yanquan ,
  • LU Yuanwei ,
  • GAO Qi ,
  • LI Feng ,
  • MA Yancheng ,
  • WANG Yuanyuan ,
  • WU Yuting
Expand
  • 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

Online published: 2024-07-15

Supported by

This work is supported by the National Natural Science Foundation of China (No. 52076006) and National Key Research and Development Program of China (No. 2022YFB4202402).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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摘要

熔盐和超临界二氧化碳（sCO2）被认为是第三代太阳能热发电最有潜力的组合换热工质之一。为评估氯化盐和碳酸盐在第三代太阳能热发电中存在的潜力，本文以熔盐和sCO2作为印刷电路板换热器（PCHE）的工作介质，利用数值模拟的方式，对不同熔盐和sCO2的PCHE通道进行了传热与摩擦研究，并分别建立了预测关联式。对翼型通道sCO2侧进行了局部换热和摩擦研究，发现入口质量流量对其影响较大，入口温度对其影响比较小。对两种熔盐的传热和摩擦进行了综合比较，氯化盐的综合性能高出碳酸盐70%-80%。结果表明氯化盐在第三代太阳能热发电中的潜力远远大于碳酸盐。

关键词： third generation solar thermal power generation; sCO2; PCHE; molten salt

本文引用格式

WANG Yanquan , LU Yuanwei , GAO Qi , LI Feng , MA Yancheng , WANG Yuanyuan , WU Yuting . Numerical Study on Heat Transfer and Frictional Resistance of Two Types of Molten Salts in Straight Channels and Supercritical Carbon Dioxide in Airfoil Channels[J]. 热科学学报, 2024 , 33(4) : 1443 -1457 . DOI: 10.1007/s11630-024-2000-6

Abstract

Molten salt and supercritical carbon dioxide (sCO2) are considered to be one of the most promising combined heat transfer refrigerants for third-generation solar thermal power generation. To evaluate the potential of chloride salts and carbonates in third-generation solar thermal power generation, this paper uses molten salts and sCO2 as the working media of printed circuit board heat exchangers (PCHE), and uses numerical simulation to study the heat transfer and friction of PCHE channels with different molten salts and sCO2, and establishes predictive correlations respectively. A local heat transfer and friction study was conducted on the sCO2 side of the airfoil channel, and it was found that the inlet mass flow rate has a significant impact on it, while the inlet temperature has a relatively small impact. A comprehensive comparison was made between the heat transfer and friction of two molten salts, and the comprehensive performance of chloride salts was 70%–80% higher than that of carbonates. The results indicate that the potential of chloride salts in third-generation solar thermal power generation is much greater than that of carbonates.

Key words： third generation solar thermal power generation; sCO2; PCHE; molten salt

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