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| 中温铯热管的启动及传热性能 | |
| 引用本文： | 郭宇翔,陈宏霞,袁达忠,李林涵,王逸然,纪阳.中温铯热管的启动及传热性能[J].化工进展,2021,40(11):5981-5987. |
| 作者姓名： | 郭宇翔 陈宏霞 袁达忠 李林涵 王逸然 纪阳 |
| 作者单位： | 1.华北电力大学能源动力与机械工程学院，北京 102206;2.中国科学院工程热物理研究所，北京 100190;3.中国科学院大学，北京 100049 |
| 基金项目： | 国家自然科学基金(52176152);2019年度预研教育部联合基金青年人才基金(6141A02033526) |
| 摘 要： | 由于铯化学性质活泼、易发生爆炸且价格昂贵，目前对中温铯热管的研究少见报道，而以高温钠、钾及钠钾合金热管的研究为主。鉴于中温热管应用及系统学术研究的需求，本文制备了铯热管，采用高频加热器调控其热流密度、数据采集系统监测管壁沿程的温度变化，对其启动性能及传热性能展开研究。实验结果表明，铯热管的启动演变规律与钠热管类似，利用Kn=0.01计算其转折温度更为准确。当热流密度q=18.04W/cm2时，通过热管沿程温度分布可知热管实现了声速极限下的启动，绝热段温度与蒸发段温度相差30.00℃。热流密度q=69.10W/cm2时，工作温度可达600.00℃，蒸发段与绝热段最大温差小于7.00℃，且有效长度为100％，表现出优异的换热性能和均温性。 |
| 关 键 词： | 铯热管 传热 两相流 启动性能 均温性 |
| 收稿时间： | 2020-11-13 |
Startup and heat transfer performance of medium temperature cesium heat pipe |
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| GUO Yuxiang,CHEN Hongxia,YUAN Dazhong,LI Linhan,WANG Yiran,JI Yang.Startup and heat transfer performance of medium temperature cesium heat pipe[J].Chemical Industry and Engineering Progress,2021,40(11):5981-5987. | |
| Authors: | GUO Yuxiang CHEN Hongxia YUAN Dazhong LI Linhan WANG Yiran JI Yang |
| Affiliation: | 1.Energy Power and Mechanical Engineering Department, North China Electric Power University, Beijing 102206, China 2.Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China 3.University of Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | 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. |
| Keywords: | cesium heat pipe heat transfer two phase flow startup performance temperature uniformity |
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