Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (7): 70602-070602.doi: 10.11889/j.0253-3219.2017.hjs.40.070602

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Heat transfer characteristics of molten salt in finned tube

FAN Qiwei1,2,3, ZHU Haihua1, CHEN Yushuang1, WANG Naxiu1,2, ZHU Zhiyuan1,2,3   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. ShanghaiTech University, Shanghai 201210, China
  • Received:2017-04-23 Revised:2017-05-02 Online:2017-07-10 Published:2017-07-10
  • About author:10.11889/j.0253-3219.2017.hjs.40.070602
  • Supported by:
    Supported by Strategic Pilot Science and Technology Project of Chinese Academy of Sciences (No. XD02040100)

Abstract: Background:High-temperature molten salt has been considered as medium for heat transfer in molten salt reactors and energy storage in solar powerdue to its excellent thermal physical properties. Purpose: This study aims at the heat transfer characteristics of molten saltand the enhanced heat transfer effect in finned tube.Methods:Based on the convective heat transfer experimental apparatus of KNO3-NaNO2-NaNO3 (53%-40%-7%) molten salt and heat transfer oil, the heat transfer characteristics of turbulent region in finned tube was studied.The convective heat transfer characteristics of molten salt in finned tube were analyzed on the basis of experimental data,and a new correlation was proposed by the least squares fitting method. Furthermore, the effect of enhanced heat transfer of finned tube was discussed based on above analysis. Results andConclusion:The error between the experimental data and the fitting formularis in the range of -7.1% and 7.5%. The Dittus-Boelter convective heat transfer correlation is used to evaluate the effect of heat transfer, and it shows that the enhanced convective heat transfer effect of the finned tube is 2.32-3.63 times of that of smooth tube.

Key words: Heat transfer, Turbulent region, Finned tube

CLC Number: 

  • TK124