Theoretical and experimental investigations on the cooling capacity distributions at the stages in the thermally-coupled two-stage Stirling-type pulse tube cryocooler without external precooling |
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| Affiliation: | 1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry of Chinese Academy of Sciences, Zhong Guan Cun Dong Road 29, Hai Dian, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Energy, Materials and Systems, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands;1. Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China;2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;1. Key Laboratory of Cryogenics, Chinese Academy of Sciences, Beijing 100190, China;2. Lihan Cryogenics Co., Ltd, Shenzhen 518055, China;1. Univ. Grenoble Alpes, CEA, IRIG, DSBT, F-38000 Grenoble, France;2. ISAS-JAXA, 3-1-1Yoshinodai,Chuo-ku, Sagamihara, Kanagawa 52-5210, Japan;3. R&D-JAXA, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan;4. AIST, National Institute of Advanced Industrial Science and Technology, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8560, Japan;5. High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan;6. CNES Toulouse, F-31055 Cedex 4, France;7. ESA-ESTEC, Noordwijk, the Netherlands;1. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, Shanghai 200083, China;2. University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China |
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| Abstract: | The two-stage Stirling-type pulse tube cryocooler (SPTC) has advantages in simultaneously providing the cooling powers at two different temperatures, and the capacity in distributing these cooling capacities between the stages is significant to its practical applications. In this paper, a theoretical model of the thermally-coupled two-stage SPTC without external precooling is established based on the electric circuit analogy with considering real gas effects, and the simulations of both the cooling performances and PV power distribution between stages are conducted. The results indicate that the PV power is inversely proportional to the acoustic impedance of each stage, and the cooling capacity distribution is determined by the cold finger cooling efficiency and the PV power into each stage together. The design methods of the cold fingers to achieve both the desired PV power and the cooling capacity distribution between the stages are summarized. The two-stage SPTC is developed and tested based on the above theoretical investigations, and the experimental results show that it can simultaneously achieve 0.69 W at 30 K and 3.1 W at 85 K with an electric input power of 330 W and a reject temperature of 300 K. The consistency between the simulated and the experimental results is observed and the theoretical investigations are experimentally verified. |
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| Keywords: | Two-stage Thermally-coupled Stirling-type pulse tube cryocooler Cooling capacity distribution Theoretical analysis Experimental verification |
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