Heat and mass transfer

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

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

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.

Cite this article

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]. Journal of Thermal Science, 2024 , 33(4) : 1443 -1457 . DOI: 10.1007/s11630-024-2000-6

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