Design and experimental investigation of a neon cryogenic loop heat pipe
Design and experimental investigation of a neon cryogenic loop heat pipe
复制标题
氖低温环路热管的设计与实验研究
DOI：
10.1007/s00231-017-2005-8
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发表时间：
2017-11-01
影响因子：
2.2
通讯作者：
Lin, Guiping
中科院分区：
文献类型：
--
作者：
He, Jiang;Guo, Yuandong;Lin, Guiping
下一代空间红外传感器和探测器对30-40 K低温热传输技术提出了迫切的要求。低温回路热管（CLHP）具有优良的热性能和传输线柔性大、无运动部件等特点，被认为是一种理想的热控解决方案。设计并实验了一种未来空间应用的红外点到点传热元件--氖CLHP。成功实现了超临界启动。实验结果表明，在二次蒸发器功率为1.5W时，可以成功实现超临界启动，而在二次蒸发器热负荷为0.5和1 W时，启动失败。在适当的辅助热负荷下，主蒸发器的最大传热能力在4.5 ~ 5 W之间。在启动前，即使热沉温度降至35 K，主蒸发器仍能保持在290 K左右，断电后主蒸发器温度迅速升高，具有良好的热开关功能。CLHP能适应一次蒸发器功率的突变，并能迅速达到新的稳态。此外，在试验过程中还观察到了一些故障现象，表明适当的二次蒸发器功率和散热器温度对机组的正常运行起着重要的作用。
Next generation space infrared sensor and detector have pressing requirement for cryogenic heat transport technology in the temperature range of 30-40 K. Cryogenic loop heat pipe (CLHP) has excellent thermal performance and particular characteristics such as high flexibility transport lines and no moving parts, thus it is regarded as an ideal thermal control solution. A neon CLHP referring to infrared point-to-point heat transfer element in future space application has been designed and experimented. And it could realize supercritical startup successfully. Experimental results show that the supercritical startup were realized successfully at cases of 1.5 W secondary evaporator power, but the startup was failed when 0.5 and 1 W heat load applied to secondary evaporator. The maximum heat transport capability of primary evaporator is between 4.5 and 5 W with proper auxiliary heat load. Before startup, even the heat sink temperature decreased to 35 K, the primary evaporator can still maintain at almost 290 K; and the primary evaporator temperature increased at once when the powers were cut off, which indicated the CLHP has a perfect function of thermal switch. The CLHP could adapt to sudden changes of the primary evaporator power, and reach a new steady-state quickly. Besides, some failure phenomena were observed during the test, which indicated that proper secondary evaporator power and heat sink temperature play important roles on the normal operation.