A miniature liquid helium temperature JT cryocooler for space application

A miniature liquid helium temperature JT cryocooler for space application
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空间应用微型液氦温度JT制冷机

DOI:
10.1007/s11431-014-5627-9
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发表时间:
2014-10
影响因子:
4.6
通讯作者:
Liang JingTao
Liang JingTao
中科院分区:
工程技术2区
文献类型:
--
作者:
Liu YanJie;Li JianGuo;Ma YueXue;Liang JingTao

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沿着航天科技的发展,小型液氦低温长寿命制冷机成为低温研究的热点。由于它是空间探测研究的前提条件,各国航天机构都在进行这方面的研究。采用三级高频热耦合脉冲管制冷机对焦耳-汤姆逊(JT)制冷机进行预冷。该系统在低温下没有运动部件,因此适合于空间操作。在开环和闭环实验中,液氦温度都得到了成功的实现。在闭合循环实验中,当输入473 W电功率时,冷却系统达到4.4K的空载温度,并且在4.54K下提供11.6mW的冷却能力。它是我国第一台微型液氦温JT制冷机,研究成果为超长波红外探测和太赫兹技术的空间应用铺平了道路。
Along with the development of space science and technology, miniature liquid helium temperature long life cryocooler is a focus subject in cryogenic study. Since it is the precondition of space detection researches, institutions of space in many countries do the research on it. In this article, we designed a compound cooling system. A three-stage high frequency thermal coupled pulse tube cryocooler was used to precool a Joule-Thomson (JT) cryocooler. This system has no moving parts at low temperatures and is hence suitable for space operation. Liquid helium temperature was successfully achieved in both open loop and closed cycle experiments. In the closed cycle experiment, when 473 W electric power was inputted, the cooling system reached a no-load temperature of 4.4 K, and a cooling capacity of 11.6 mW was provided at 4.54 K. It is the first miniature liquid helium temperature JT cryocooler in China and the research achievement paves a way for the space application of ultra- long wave infrared detection and THz technologies.
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