Study on precooling temperature and pressure characteristics of 4 K Joule-Thomson cryocooler

被引：0
|
作者：
Dong C. [1 ,2 ]
Liu S. [2 ]
Jiang Z. [2 ]
Tang Y. [1 ,2 ]
Xiang Z. [1 ,2 ]
Cui X. [1 ]
Wu Y. [2 ]
机构：
[1] School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai
[2] Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 12期
关键词：
JT; Liquid helium; Precooling temperature; Pressure;
D O I：
10.11949/0438-1157.20190144
中图分类号：
学科分类号：
摘要：
Space 4 K Joule-Thomson (JT) throttling cooling is one of the key technologies for deep space exploration missions. Based on the existing experimental system of a precooled 4 K JT cryocooler, the effects of the precooling temperature and the high pressure on the maximum cooling capacity are analyzed theoretically. Then, the optimal precooling temperature and high pressure under different working conditions are involved. The experimental studies are developed to verify the theoretical calculations. The maximum cooling performance were tested under five different high pressures (0.829 MPa, 1.103 MPa, 1.775 MPa, 1.837 MPa, and 2.154 MPa) at the final pre-cooling temperature of 15 K and three different pre-cooling temperatures (11.5 K, 15.0 K and 18.0 K) at high pressure 1.773 MPa. The trend of the experimental results is in good agreement with the theoretical values. The study on the influence of precooling temperature and pressure characteristics will be helpful for optimizing the coupling matching of the compressor and precooling cooler for the 4 K JT system. © All Right Reserved.
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页码：4528 / 4535
页数：7
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