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Journal of Thermal Science

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2024 , Vol. 33 >Issue 4: 1394 - 1408

DOI: https://doi.org/10.1007/s11630-024-1955-7

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Operational Characteristics of Loop Heat Pipe in Microgravity and Normal Gravity Environments

  • ZHONG Siyuan ,
  • XIE Rongjian ,
  • LI Yunfei ,
  • SUN Xiaojin
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  • 1. Shanghai Institution of Technology and Physics, Shanghai 200083, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. Shanghai Institute of Satellite Engineering, Shanghai 200240, China

网络出版日期: 2024-07-15

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Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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Operational Characteristics of Loop Heat Pipe in Microgravity and Normal Gravity Environments

  • ZHONG Siyuan ,
  • XIE Rongjian ,
  • LI Yunfei ,
  • SUN Xiaojin
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  • 1. Shanghai Institution of Technology and Physics, Shanghai 200083, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. Shanghai Institute of Satellite Engineering, Shanghai 200240, China

Online published: 2024-07-15

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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摘要

环路热管（LHP）是一种先进且高效的两相传热单元。受重力影响，其运行特性在在微重力环境下与地面常重力环境相比可能会有所不同。我们对比了冷凝器温度在243.15 K至303.15 K的铜-丙烯环路热管在轨和地面测试中温度数据，对其运行性能进行了比较和分析。在八个多月的复杂轨道加热环境下，该环路热管成功启动超过193次，具有良好的传热特性和稳定的在轨启动特性。在热负荷较小（10.0 W）的情况下，该环路热管的平均启动时间为110.0 s,启动温差为5.71 K至12.78 K。当冷凝器温度达250.0 K时，该环路热管的在轨稳态传热温差为3.83 K，与地面试验测试结果的2.20 K相比，传热效果基本一致。本文结果可以为后续的环路热管空间设计和应用提供参考。

关键词： Loop Heat Pipe (LHP); start up; microgravity; on-orbit experiment

本文引用格式

ZHONG Siyuan , XIE Rongjian , LI Yunfei , SUN Xiaojin . Operational Characteristics of Loop Heat Pipe in Microgravity and Normal Gravity Environments[J]. 热科学学报, 2024 , 33(4) : 1394 -1408 . DOI: 10.1007/s11630-024-1955-7

Abstract

The loop heat pipe (LHP) is an advanced, efficient two-phase heat transfer unit, whose operational performance may be affected by microgravity conditions in contrast to ground-based applications. The performance of on-orbit temperature data and ground test of a copper-propylene LHP with a condenser temperature range of 243.15 K to 303.15 K were employed to compared and analyzed. The LHP has successfully started up for more than 193 times with a good heat transfer performance and a stable start-up stabilization on-orbit under a complex orbital heating environment for more than eight months. With a small heat load (10.0 W), the average start-up time is 110.0 s while the start-up temperature ranges from 5.71 K–12.78 K. The start-up time at large temperature differences in the high temperature zone will be higher than the time required for start-up at smaller temperature differences in the low one. When the condenser temperature is 250.0 K, the stable temperature difference on orbit is 3.83 K, which is generally consistent in heat transfer compared to 2.20 K in the ground test. In this paper, we can conclude that the on-orbit flight data up to now can provide a reference to the design of subsequent LHP space applications.

Key words： Loop Heat Pipe (LHP); start up; microgravity; on-orbit experiment

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