Startup and heat transfer performance of medium temperature cesium heat pipe

被引：0
|
作者：
Guo Y. [1 ]
Chen H. [1 ]
Yuan D. [2 ,3 ]
Li L. [1 ]
Wang Y. [1 ]
Ji Y. [2 ,3 ]
机构：
[1] Energy Power and Mechanical Engineering Department, North China Electric Power University, Beijing
[2] Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing
[3] University of Chinese Academy of Sciences, Beijing
来源：
Chen, Hongxia (hxchen@ncepu.edu.cn); Yuan, Dazhong (yuandz@iet.cn); Yuan, Dazhong (yuandz@iet.cn) | 1600年 / Materials China卷 / 40期
关键词：
Cesium heat pipe; Heat transfer; Startup performance; Temperature uniformity; Two phase flow;
D O I：
10.16085/j.issn.1000-6613.2020-2293
中图分类号：
学科分类号：
摘要：
Due to active chemical properties and a high price of cesium, few studies on medium temperature cesium heat pipe were reported, while most researches were focus on sodium, potassium and Na-K alloy heat pipes. To meet the demands of applications at medium temperature and a systematic academic research, a medium temperature cesium heat pipe was fabricated and experimentally tested in this paper. Heat fluxes were modulated by a high frequency heater and the temperature revolutions of heat pipe wall along the pipe length were monitored by a data acquisition system. The results showed that the start-up performance of the cesium heat pipe was similar to that of a sodium heat pipe, and the transition temperature of a cesium heat pipe could be accurately calculated with Kn=0.01. When heat flux q was 18.04W/cm2, the temperature distribution along the heat pipe indicated that the cesium heat pipe entered the start-up state with a sonic limit, and a temperature difference between adiabatic and evaporation sections reached 30.00℃. Increasing heating flux to 69.10W/cm2, the working temperature of heat pipe could reach 600.00℃ with the maximum temperature difference between the evaporation section and the adiabatic section less than 7.00℃. Furthermore, the effective length of this cesium heat pipe was 100% which showed an excellent heat transfer performance and temperature uniformity. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：5981 / 5987
页数：6
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