高温熔盐热管的启动和等温性能

doi:10.11949/0438-1157.20200194

化工学报 ›› 2020, Vol. 71 ›› Issue (11): 5099-5106.DOI: 10.11949/0438-1157.20200194

高温熔盐热管的启动和等温性能

王刚¹(),熊亚选¹(),吴玉庭²,徐鹏¹,冷光辉³,马重芳²

^1.北京建筑大学供热供燃气通风及空调工程北京市重点实验室，北京 100044
^2.北京工业大学传热强化与过程节能教育部重点实验室，北京 100124
^3.河南东大高温节能材料有限公司，河南鹤壁 458030

收稿日期:2020-02-07 修回日期:2020-06-28 出版日期:2020-11-05 发布日期:2020-11-05
通讯作者: 熊亚选
作者简介:王刚（1985—），男，讲师，wanggang@bucea.edu.cn
基金资助:
国家自然科学基金项目(51206004);北京市自然科学基金重点项目(3151001);鹤壁市重大创新专项

Startup and isothermal performance of high-temperature molten salt heat pipe

Gang WANG¹(),Yaxuan XIONG¹(),Yuting WU²,Peng XU¹,Guanghui LENG³,Chongfang MA²

^1.Beijing Key Laboratory of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
^2.Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education, Beijing University of Technology, Beijing 100124, China
^3.Henan Dongda High Temperature Energy-Saving Material Co. , Ltd. , Hebi 458030, Henan, China

Received:2020-02-07 Revised:2020-06-28 Online:2020-11-05 Published:2020-11-05
Contact: Yaxuan XIONG

摘要/Abstract

摘要：

高温热管是高温领域高效传热的关键技术。为进一步研究开发高效热管，提升工业过程传热性能，以熔盐作为热管的传热工质，搭建了高温热管传热实验台，研究了传热工质和倾斜角对热管启动和等温性能的影响。结果表明，在450～700 K工作温度范围内，AlBr₃和TiCl₄熔盐热管在倾斜角为45°和60°的条件下，均达到最优的启动性能；在热管倾斜角为60°时，两种熔盐热管等温性能均达到最佳。无机盐AlBr₃和TiCl₄作为传热工质，重力热管具有良好的启动和等温性能。

关键词: 熔盐, 热管, 凝结, 传递, 启动

Abstract:

High-temperature heat pipe is the key technology for efficient heat transfer in high-temperature fields. To develop high efficiency heat pipes further and improve the heat transfer performance in industrial process, gravity heat pipes with molten salt as heat transfer medium was developed. A high-temperature heat pipe test bench was set up and effect of working fluids and inclination angles on the startup characteristics and isothermal performance of the gravity heat pipe was studied experimentally. The results showed that as the inclination angle was 45° and 60°, the startup characteristics of heat pipes with AlBr₃ and TiCl₄ as working fluids was the best respectively, while the isothermal performance of the heat pipes was the best as the inclination angle was 60°. The inorganic salts AlBr₃ and TiCl₄ are used as the heat transfer working medium, and the gravity heat pipe has good starting and isothermal properties.

Key words: molten salt, heat pipe, condensation, transport, startup

中图分类号:

TK 124

王刚,熊亚选,吴玉庭,徐鹏,冷光辉,马重芳. 高温熔盐热管的启动和等温性能[J]. 化工学报, 2020, 71(11): 5099-5106.

Gang WANG,Yaxuan XIONG,Yuting WU,Peng XU,Guanghui LENG,Chongfang MA. Startup and isothermal performance of high-temperature molten salt heat pipe[J]. CIESC Journal, 2020, 71(11): 5099-5106.

图/表 13

图1 高温熔盐重力热管实验装置示意图1—热管管壳；2—耐高温保温材料；3—管式电加热炉；4—可控硅；5—K型热电偶；6—数据采集器；7—PC；8—可调支架；9—真空模块

Fig.1 Schematic diagram of the experimental apparatus for high temperature molten salt gravity heat pipe

图2 高温熔盐重力热管实验装置实物图

Fig.2 Image of the experimental apparatus for high temperature molten salt gravity heat pipe

表1 机械泵的型号和工作参数

Table 1 The model of mechannical vaccum pump and working parameters

关气镇极限

全压力/Pa

气镇极限

全压力/Pa

气镇极限

分压力/Pa

表2 扩散泵的型号和工作参数

Table 2 The model of diffusion pump and working parameters

主要部件	型号	极限压力/Pa	抽气速度/(L·s^-1)	最大排气压力/Pa	加热功率/kW	冷却水耗量/(L·s^-1)
扩散泵	KT-150	5×10^-4	1000	40	1.0	0.083

表3 电加热炉的型号和工作参数

Table 3 The model of electric heating furnace and working parameters

主要部件	型号	炉口直径/mm	炉膛内高/mm	额定功率/kW	最大工作温度/℃	额定工作温度/℃
电加热炉	SG2-7	30	1000	7	1000	1300

图3 热管结构及壁面温度测点

Fig.3 Heat pipe structure and wall temperature measurement point

表4 热管工质的基本特性参数

Table 4 Basic characteristics of working fluid of heat pipe

熔化潜热/

(kJ·kg^-1)

AlBr₃

TiCl₄

C₁₀H₈

图4 重力热管工作倾斜角

Fig.4 Inclination angles of gravity heat pipe

图5 1#热管不同倾斜角下壁面温度变化

Fig.5 Temperature change of heat pipe wall of 1# heat pipe under different inclination angle

图6 热管启动阶段轴向最大温差随时间变化

Fig.6 The maximum axial temperature difference changes with time during the start-up phase of the heat pipe

图7 不同倾斜角下熔盐热管的壁面温度分布

Fig.7 Wall temperature distribution of molten salt heat pipes at different inclination angles

图8 不同传热工质的热管启动性能

Fig.8 Start-up performance of heat pipes with different heat transfer media

图9 不同传热工质的热管等温性能

Fig.9 Isothermal performance of heat pipes with different heat transfer media

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高温熔盐热管的启动和等温性能

Startup and isothermal performance of high-temperature molten salt heat pipe

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