Nuclear Science and Techniques ›› 2019, Vol. 42 ›› Issue (4): 40601-040601.doi: 10.11889/j.0253-3219.2019.hjs.42.040601

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Experimental study on turbulent convective heat transfer of molten salts in circular tubes

Yushuang CHEN1,2,Jian TIAN1(),Haihua ZHU1,Yuan FU1,Naxiu WANG1()   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-01-14 Revised:2019-03-04 Online:2019-04-10 Published:2019-04-18
  • Contact: Jian TIAN,Naxiu WANG E-mail:tianjian@sinap.ac.cn WANG Naxiu;tianjian@sinap.ac.cn;tianjian@sinap.ac.cn WANG Naxiu;wangnaxiu@sinap.ac.cn
  • About author:<named-content content-type="corresp-name">CHEN Yushuang</named-content>, female, born in 1984, graduated from University of Shanghai for Science and Technology in 2010, doctoral student, focusing on the thermal hydraulics of nuclear reactor|<named-content content-type="corresp-name">CHEN Yushuang</named-content>, female, born in 1984, graduated from University of Shanghai for Science and Technology in 2010, doctoral student, focusing on the thermal hydraulics of nuclear reactor|TIAN Jian, E-mail: <email>tianjian@sinap.ac.cn WANG Naxiu</email>, E-mail: <email>wangnaxiu@sinap.ac.cn</email>|TIAN Jian, E-mail: <email>tianjian@sinap.ac.cn WANG Naxiu</email>, E-mail: <email>wangnaxiu@sinap.ac.cn</email>
  • Supported by:
    Supported by Strategic Priority Research Program of Chinese Academy of Sciences(No.XDA02010000)

Abstract: Background

With advantages of large thermal capacity, good chemical stability, high temperature, molten salt has recently been widely used in concentrated solar thermal power plants, nuclear reactors, chemical engineerings, and other fields.

Purpose

This study aims at the convective heat transfer characteristics and verifying the heat transfer laws of molten salt in a circular tube.

Methods

First of all, a thermal experimental loop of Nitrate (KNO3-53%, NaNO2-40%,NaNO3-7%) was built as basic experimental facility. The turbulent convective heat transfer coefficient of molten salt in circular tube for fully developed was obtained by Wilson's correction method. Then the experimental results combining with the experimental data of five kinds of molten salt in the open literature were fitted to get the experimental correlation of molten salt in the range of 10 000<Re<50 000 and 4<Pr<26 for the turbulent flow in the round tube. Finally, comparisons of different kinds of molten salt with classical correlation Dittus-Boelter correlation, Sieder-Tate correlation, Hausen correlation and Gnielinski correlation were conducted.

Results

The experimental data of molten salt agree well with the existing known relationship, and the deviation was below 25%.

Conclusion

The results show that the heat transfer characteristics of the molten salts still conform to the classical heat transfer relationship.

Key words: Molten salt, Turbulent flow, Forced convection, Convective heat transfer, Correlation

CLC Number: 

  • TL3