Experimental and numerical simulation on heat transfer characteristics of vertical cesium heat pipes

被引：0
|
作者：
Zhao J. [1 ,2 ]
Guo Y. [1 ,2 ]
Chen H. [1 ,2 ]
Yuan D. [3 ,4 ]
Du X. [1 ,2 ]
机构：
[1] Key Laboratory of Power Station Energy Transfer Conversion and System, Ministry of Education, North China Electric Power University, Beijing
[2] Energy Power and Mechanical Engineering Department, North China Electric Power University, Beijing
[3] Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing
[4] University of Chinese Academy of Sciences, Beijing
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2024年 / 43卷 / 04期
关键词：
heat pipe; heat transfer; multiphase flow; numerical simulation; phase distribution; temperature uniformity;
D O I：
10.16085/j.issn.1000-6613.2023-0622
中图分类号：
学科分类号：
摘要：
Medium-temperature cesium heat pipes’expensive cost and the active chemical properties of cesium medium, lead to a big difficulty for experimental study. Thus, it is of great significance to analyze and predict the start-up characteristics and internal phase-change heat transfer of the cesium heat pipe by numerical simulation. Firstly, the frozen start-up experiment of a vertical cesium heat pipe was carried out, and based on current heat pipe simulation models, an adaptive model with consideration of the linkage of evaporator and condenser was established by UDF. As proved, the maximum temperature difference of the heat pipe wall between the experimental and the numerical simulation result was less than 20K, and the sudden temperature drop at the end of the condenser was present realistically, which proved the accuracy of the model. Secondly, based on the frozen start-up experiment of a vertical cesium heat pipe with variable heating power, the evolution of wall temperature and internal phase distribution of the heat pipe during the start-up process was simulated, and the average difference of wall temperature was used to evaluate the temperature uniformity over the effective length. At last, with various evaporator lengths (200mm and 120mm), heating powers (1028.2W and 844.4W) and filling ratios (8.8%, 12% and 15%), the phase distribution, temperature distribution and pressure distribution were compared and analyzed in simulation. The optimum matching condition of the evaporator length and the filling ratio was obtained by considering of the effective working length, temperature uniformity, condensate stacking and dry-out phenomena in the evaporator. The content had great potential significance for the optimal design of heat pipes. © 2024 Chemical Industry Press Co., Ltd.. All rights reserved.
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页码：1711 / 1719
页数：8
相关论文
共 31 条
  • [21] YANG Haiwang, WANG Chenglong, ZHANG Dalin, Et al., Parameter sensitivity study on startup characteristics of high temperature potassium heat pipe, Nuclear Engineering and Design, 392, (2022)
  • [22] WANG Shuangfeng, CHEN Jinjian, HU Yanxin, Et al., Effect of evaporation section and condensation section length on thermal performance of flat plate heat pipe, Applied Thermal Engineering, 31, 14, pp. 2367-2373, (2011)
  • [23] GUO Yuxiang, CHEN Hongxia, YUAN Dazhong, Et al., Startup and heat transfer performance of medium temperature cesium heat pipe, Chemical Industry and Engineering Progress, 40, 11, pp. 5981-5987, (2021)
  • [24] CHEN Hongxia, GUO Yuxiang, YUAN Dazhong, Et al., Experimental study on frozen startup and heat transfer characteristics of a cesium heat pipe under horizontal state, International Journal of Heat and Mass Transfer, 183, (2022)
  • [25] SUN Hao, PELLEGRINI Marco, WANG Chenglong, Et al., CFD simulation based on film model of high temperature potassium heat pipe at different positions: Horizontal, vertical, and 45° inclined, Progress in Nuclear Energy, 154, (2022)
  • [26] VALENTIN Guichet, BERTRAND Delpech, HUSSAM Jouhara, Experimental investigation, CFD and theoretical modeling of two-phase heat transfer in a three-leg multi-channel heat pipe, International Journal of Heat and Mass Transfer, 203, (2023)
  • [27] WANG Xiaoyuan, SHI Yuwen, LIU Tiancheng, Et al., CFD modeling of liquid-metal heat pipe and hydrogen inactivation simulation, International Journal of Heat and Mass Transfer, 199, (2022)
  • [28] PANDA K K, DULERA I V, BASAK A., Numerical simulation of high temperature sodium heat pipe for passive heat removal in nuclear reactors, Nuclear Engineering and Design, 323, pp. 376-385, (2017)
  • [29] YU Qingyuan, ZHAO Pengcheng, MA Yugao, CFD analysis on characteristics of high temperature heat pipe, Nuclear Power Engineering, 43, 2, pp. 70-76, (2022)
  • [30] QIAN Zengyuan, Thermophysical properties of low melting point metals, (1985)
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