丙烯环路热管补偿器的可视化实验研究

刘成; 谢荣建; 王仕越; 吴亦农

doi:10.13700/j.bh.1001-5965.2019.0322

丙烯环路热管补偿器的可视化实验研究

doi: 10.13700/j.bh.1001-5965.2019.0322

刘成^{1, 2},
谢荣建^1, ,,
王仕越¹,
吴亦农^{2, 3}

1.
中国科学院上海技术物理研究所, 上海 200083
2.
上海科技大学信息科学与技术学院, 上海 201210
3.
中国科学院大学, 北京 100049

基金项目:

国家自然科学基金 51776121

详细信息

作者简介:
刘成男, 博士研究生。主要研究方向:环路热管

谢荣建男, 博士, 副研究员。主要研究方向:空间载荷热控技术

通讯作者:
谢荣建, E-mail: xierongjian@mail.sitp.ac.cn

中图分类号: TK124
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- 被引次数: 0
出版历程
- 收稿日期: 2019-06-20
- 录用日期: 2019-08-30
- 网络出版日期: 2020-05-20

Visualization experimental study of compensation chamber of a propylene loop heat pipe

LIU Cheng^{1, 2},
XIE Rongjian^{1
, ,},
WANG Shiyue¹,
WU Yinong^{2, 3}

1.
Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
2.
School of Information Science and Technology, ShanghaiTech University, Shanghai 201210, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

National Natural Science Foundation of China 51776121

More Information

Corresponding author: XIE Rongjian, E-mail: xierongjian@mail.sitp.ac.cn

摘要

摘要:
通过采用石英补偿器和高速摄像机实现了对丙烯环路热管补偿器的可视化实验研究，重点研究了补偿器内工质的状态随充装量和传热量的变化及充装量对环路热管传热性能的影响。研究发现，容积为51.4 mL的环路热管最佳充装量约为19.7 g。充装量小于最佳充装量的各工况下，能观察到对应补偿器内工质液面高度低于引流管，蒸发器和补偿器之间相变换热强烈，引流管外壁面明显有工质的冷凝及流动，且工质冷凝和流动的速度随着传热量的增加而加快；随着充装量增加，环路热管传热热阻减小，280 K工作温度以下的传热量增大。最佳充装量对应的补偿器内液面高度浸没引流管而接近蒸发器核心通道顶端，得到280 K以下最大传热量为40 W，对应的最优传热热阻为2 K/W。充装量大于最佳充装量的工况下，补偿器内液面高度超过蒸发器核心顶端，随着充装量增加，环路热管传热热阻增大，280 K以下的传热量减小。补偿器和蒸发器核心通道内的工质分布能影响蒸发器向补偿器的漏热量，这是充装量影响环路热管性能的重要原因。
- 环路热管 /
- 丙烯 /
- 补偿器 /
- 可视化 /
- 充装量 /
- 热阻 /
- 毛细芯
Abstract:
By the employment of quartz compensation chamber and high-speed camera, the visualization experimental study on the compensation chamber of a propylene loop heat pipe was implemented, which mainly focused on the variation of state of working fluid in the compensation chamber with the effect of the working fluid inventory and heat transfer capacity, and the effect of working fluid inventory on the heat transfer performance of the loop heat pipe. The results indicate that the optimal working fluid inventory for the loop heat pipe with volume of 51.4 mL is about 19.7 g. The liquid levels inside the compensation chamber are lower than the bayonet when the fluid inventory is less than the optimal one, intense two-phase heat exchange between the evaporator and the compensation chamber is confirmed by the observation of obvious condensation and flow of the liquid on the outer surface of the bayonet, and the condensation rate and flow velocity increase with the rise of heat transfer capacity; the heat transfer thermal resistance of the loop heat pipe decreases and the heat transfer capacity below 280 K increases with the rise of the fluid inventory. With an optimal fluid inventory, the liquid level inside the compensation chamber immerses the bayonet and is close to the top of the evaporator core, and thus the best performance is obtained: a maximum power of 40 W that can be transferred below 280 K and a corresponding thermal resistance of 2 K/W. Liquid levels inside the compensation chamber are higher than the top of the evaporator core when the fluid inventory is more than the optimal one. The heat transfer thermal resistance increases and the heat transfer capacity below 280 K decreases with the rise of the fluid inventory. The liquid distribution inside the compensation chamber and evaporator core has considerable effect on the heat leak between the evaporator and the compensation chamber, which is a significant factor for the influence of working fluid inventory on the performance of loop heat pipe.
- loop heat pipe /
- propylene /
- compensation chamber /
- visualization /
- working fluid inventory /
- thermal resistance /
- porous wick

HTML全文

图 1 环路热管结构示意图

Figure 1. Schematic of loop heat pipe structure

下载: 全尺寸图片幻灯片

图 2 补偿器与蒸发器连接示意图

Figure 2. Schematic of connection between compensation chamber and evaporator

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图 3 O形密封圈横切面示意图

Figure 3. Schematic of transverse section of O-shaped sealing ring

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图 4 实验系统示意图

Figure 4. Schematic of experimental system

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图 5 降温前后补偿器内液面高度变化对比

Figure 5. Comparison of liquid levels inside compensation chamber before and after cooling

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图 6 充装量为13.7 g时环路热管的启动过程

Figure 6. Start-up process of loop heat pipe with a working fluid inventory of 13.7 g

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图 7 充装量为16.7 g时补偿器内的工质状态

Figure 7. States of working fluid inside compensation chamber with a working fluid inventory of 16.7 g

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图 8 充装量为19.7 g时环路热管启动及运行

Figure 8. Start-up and operation of loop heat pipe with a working fluid inventory of 19.7 g

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图 9 充装量为22.7 g时补偿器内液面高度的变化

Figure 9. Variation of liquid level inside compensation chamber with a working fluid inventory of 22.7 g

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图 10 280 K工作温度以下的环路热管传热热阻

Figure 10. Heat transfer thermal resistances of loop heat pipe for operating temperatures below 280 K

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表 1 环路热管参数

Table 1. Parameters of loop heat pipe

部件	尺寸	数值
蒸发器	长度×外径/(mm×mm)	90×24
蒸发器	长度×内径/(mm×mm)	90×20
毛细芯	孔径/μm	1.75
气体管线	长度×外径/(mm×mm)	1030×3
气体管线	长度×内径/(mm×mm)	1030×2
冷凝器	长度×外径/(mm×mm)	540×6
冷凝器	长度×内径/(mm×mm)	540×3
液体管线	长度×外径/(mm×mm)	1100×3
液体管线	长度×内径/(mm×mm)	1100×2
补偿器	长度×外径/(mm×mm)	60×24
补偿器	长度×内径/(mm×mm)	60×20

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