A 600mW@20 K thermally-coupled two-stage pulse tube precooler for space 4 K JT cryocooler reaches high efficiency with double-inlet phase shifter

IF 1.8 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics Pub Date : 2025-04-10 DOI:10.1016/j.cryogenics.2025.104075

Bin Yang , Ziyao Liu , Mingtao Pan , Bo Tian , Jia Quan , Yuexue Ma , Yanjie Liu , Houlei Chen , Miguang Zhao , Jingtao Liang

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Abstract

The suitable cryogenic environment is a necessary condition for ensuring the high precision and high sensitivity operation of space exploration equipment. The two-stage pulse tube cryocooler (PTC) is the basis for the normal operation of space exploration equipment working in the liquid hydrogen temperature range and cryogenic systems such as the Joule-Thomson cryocooler (JTC) that requires pre-cooling in the liquid hydrogen temperature range. Based on the pre-cooling requirements of ⁴He JTC developed by our laboratory, a high efficiency thermally-coupled two-stage PTC utilizing double-inlet phase shifter and pure SS screen filling is designed, manufactured, and tested with an eye toward space applications. Under a total electric power of 185 W, a cooling capacity of 647 mW@20 K was obtained, resulting in a maximum relative Carnot efficiency (rCOP) of 4.90 %, which met the design target. In addition, the cooling characteristics and temperature stability of the PTC were tested.

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一种用于空间4k JT制冷机的600mW@20 K热耦合两级脉冲管预冷器，采用双进口移相器，达到了高效率

适宜的低温环境是确保空间探索设备高精度、高灵敏度运行的必要条件。两级脉冲管低温冷却器（PTC）是在液氢温度范围内工作的空间探测设备和需要在液氢温度范围内预冷的焦耳-汤姆逊低温冷却器（JTC）等低温系统正常运行的基础。根据本实验室开发的 4He JTC 的预冷要求，设计、制造和测试了一种高效热耦合两级 PTC，采用双入口移相器和纯 SS 筛网填充，着眼于太空应用。在总功率为 185 W 的情况下，获得了 647 mW@20 K 的冷却能力，最大相对卡诺效率 (rCOP) 为 4.90 %，达到了设计目标。此外，还测试了 PTC 的冷却特性和温度稳定性。

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来源期刊

Cryogenics 物理-热力学

CiteScore

3.80

自引率

9.50%

发文量

审稿时长

2.1 months

期刊介绍： Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are: - Applications of superconductivity: magnets, electronics, devices - Superconductors and their properties - Properties of materials: metals, alloys, composites, polymers, insulations - New applications of cryogenic technology to processes, devices, machinery - Refrigeration and liquefaction technology - Thermodynamics - Fluid properties and fluid mechanics - Heat transfer - Thermometry and measurement science - Cryogenics in medicine - Cryoelectronics