化工学报2019，Vol.70Issue(12)：4528-4535,8.DOI:10.11949/0438-1157.20190144
4K节流制冷机预冷温度及压力特性影响研究
Study on precooling temperature and pressure characteristics of 4 K Joule-Thomson cryocooler
摘要
Abstract
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.关键词
JT/液氦温区/预冷温度/压力Key words
JT/ liquid helium/ precooling temperature/ pressure分类
通用工业技术引用本文复制引用
董彩倩,刘少帅,蒋珍华,汤逸豪,向振之,崔晓钰,吴亦农..4K节流制冷机预冷温度及压力特性影响研究[J].化工学报,2019,70(12):4528-4535,8.基金项目
国家自然科学基金项目(51806231) （51806231）
上海市自然科学基金项目(18ZR1445600) （18ZR1445600）
中国博士后科学基金项目(2018M630476) （2018M630476）
