Temperature Fluctuation of a Closed-Cycle Helium Joule-Thomson Cryocooler with Two-Stage Precooling

作     者：CHEN Zhichao CUI Xiaoyu LIU Shaoshuai WU Yinong JIANG Zhenhua DING Lei 

作者机构：School of Energy and power EngineeringUniversity of Shanghai for Science and TechnologyShanghai20093China Shanghai Institution of Technology and PhysicsChinese Academy of SciencesShanghai200083China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2023年第32卷第4期

页      面：1501-1511页

核心收录：

学科分类：08[工学] 082504[工学-人机与环境工程] 0825[工学-航空宇航科学与技术] 

基　　金：This study is financially supported by the Hundred Talents Program of the Chinese Academy of Sciences,the National Natural Science Foundation of China(No.51806231) the Strategic Priority Research Program of Chinese Academy of Sciences(XDB35000000) the Natural Science Foundation of Shanghai(No.18ZR1445600) the China Postdoctoral Science Foundation(2018M630476) 

主　　题：temperature fluctuation liquid helium temperature Joule-Thomson cryocooler precooling temperature 

摘      要：For quantum communications,single-photon detection,millimeter wave detection and other space projects,all of them need to work at liquid helium temperatures to achieve excellent *** closed-cycle helium Joule-Thomson cryocooler(JTC)is currently one of the mainstream solutions to realize the liquid helium *** realizing the liquid helium temperature,the detector has strict requirements on the temperature fluctuation of the JTC,because the thermal noise caused by the JTC temperature fluctuation will have a critical impact on the detection *** typical closed-cycle helium JTC is precooling by a two-stage *** the operating parameters of the JTC compressor remain unchanged,the change of the precooler is the main factor that affects the temperature fluctuation of the *** explore the influence mechanism of JTC temperature fluctuations,experimental and theoretical studies are carried *** on the real gas equation of state,the influence of various parameters on the evaporator temperature fluctuations is *** results show that the increase in temperature of each stage will cause the temperature of the JTC to ***,the change of the secondary precooling temperature(T_(pre2))has the most obvious influence on JTC ***,the influence of the JT compressor’s buffer tank volume Vb on temperature fluctuation is *** increasing the Vb,the JTC temperature fluctuation caused by the temperature change of the precooler can be effectively reduced.