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| Active control strategy of cooling capacity based on pulse tube refrigerator of dual temperature zones |
Hejun HUI1,2( ),Yinong WU1,2,Jiantang SONG1,Wang YIN1,2,Zhenhua JIANG1,2,Shaoshuai LIU1,2,*() |
1. Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract A method was proposed where an active phase shifter with acoustic power recovery was applied to actively control their cooling supplies there in response to the new requirement of variable cooling supplies in dual temperature zones in space exploration. The influence characteristics on the distribution of the cold finger acoustic power and the efficiency of the regenerator in the dual temperature zones were obtained by analyzing the influence of the piston movement characteristics of the phase shifter in the high-temperature zone on the impedance of the cold fingers in the dual-temperature zones. The cryocooler can actively supply the desired cooling powers (@80 K and 40 K), respectively. The numerical calculation results show that the phase difference of the phase shifter piston mainly influences the cooling capacity in the high-temperature zone. The amplitude and phase difference of the phase shifter piston significantly affects the cooling capacity in the low-temperature zone. The experimental results show that the cooling capacity in the 80 K temperature zone can be actively adjusted in the range of 9.2 W to 23.7 W with the active control of the phase shifter, and the cooling capacity in the 40 K temperature zone can be actively adjusted in the range of 3.2 W to 4.5 W.
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Received: 22 March 2023
Published: 07 November 2023
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| Fund: 国家自然科学基金资助项目（51806231）；中国科学院战略性先导科技专项（B类）项目（XDB35000000，XDB35040102） |
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Corresponding Authors:
Shaoshuai LIU
E-mail: hhun@mail.ustc.edu.cn;liushaoshuai@mail.sitp.ac.cn
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双温区脉管制冷机的制冷量主动调控策略
针对空间探测中须在双温区提供不同制冷量的新需求，提出利用声功回收主动调相器对双温区制冷量进行主动调控的方法. 研究分析高温区调相器活塞运动特性对双温区冷指阻抗的影响，得到调相器对双温区冷指声功率分配及回热器效率的影响特性，实现80 K和40 K双温区制冷量主动调控. 数值计算结果显示，调相器相位差对高温区制冷量影响较大，调相器振幅和相位差对低温区制冷量均有明显的影响. 实验结果表明，采用基于主动控制调相器活塞运动特性的调节策略，80 K温区制冷量可以在9.2~23.7 W内主动调节，40 K温区制冷量可以在3.2~4.5 W内主动调节.
关键词：
脉管制冷机,
主动调相,
双制冷温区,
阻抗分析,
调控策略
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