摘要
针对目前空间探测任务对高效可靠的液氦温区制冷技术的需求,介绍了自行研制的液氦温区JT制冷机测试系统及制冷机结构,采用带有进排气阀的单级线性压缩机驱动,由两级GM制冷机预冷,测试了JT制冷机在闭式循环条件下的制冷性能。结果表明,JT制冷机经5.5 h降温至液氦温区,无负荷制冷温度为4.4 K,在4.9 K获得87.98 mW的制冷量,驱动JT侧线性压缩机所耗电功41.6 W。并分析了制冷机闭式循环与开式实验中存在的差异,表明热负荷的改变会影响制冷机的运行状态。
Targeting the demand of efficient and realiable liquid helium temperature cooling technology in space exploration mission,a JT cryocooler test system for liquid helium temperature was developed by Zhejiang University and the structure of the cryocooler was introduced.A valved single-stage linear compressor was used to drive the JT cryocooler which was precooled by a two stage GM cryocooler.The cooling performance of the cryocooler was tested under closed cycle condition.The experimental results showed that the JT cryocooler cools down to the liquid helium temperature in 5.5 hours.The no-load cooling temperature was 4.4 K.The achieved cooling power was 87.98 mW at 4.9 K and the electrical power consumption of the linear compressor was 41.6 W.The differences between the open and the closed experiments were analyzed and found that the change of the heat load will affect the operating state of the cryocooler.
作者
陈思凡
李江道
申运伟
刘东立
甘智华
赵志萍
耑锐
张亮
CHEN Sifan;LI Jiangdao;SHEN Yunwei;LIU Dongli;GAN Zhihua;ZHAO Zhiping;ZHUAN Rui;ZHANG Liang(Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China;Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province,Hangzhou 310027,China;Shanghai Institute of Aerospace Systems Engineering,Shanghai 201108,China;Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province,School of Engineering,Westlake University,Hangzhou 310024,China;Institute of Advanced Technology,Westlake Institute for Advanced Study,Hangzhou 310024,China)
出处
《载人航天》
CSCD
北大核心
2019年第6期726-732,共7页
Manned Spaceflight
基金
国家自然科学基金(51806199)
载人航天预先研究项目(010106)
关键词
液氦温区
JT制冷机
闭式循环
线性压缩机
liquid helium temperature
JT cryocooler
closed cycle
linear compressor
