Investigation on a thermal-coupled two-stage Stirling-type pulse tube cryocooler |
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| Authors: | Luwei Yang |
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| Affiliation: | 1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry of Chinese Academy of Sciences, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Lihan Cryogenics Co., Ltd, Shenzhen 518055, China;4. Shanghai Institute of Technical Physics of Chinese Academy of Sciences, Shanghai 200083, China;1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, CAS, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;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 |
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| Abstract: | Multi-stage Stirling-type pulse tube cryocoolers with high frequency (30–60 Hz) are one important direction in recent years. A two-stage Stirling-type pulse tube cryocooler with thermally coupled stages has been designed and established two years ago and some results have been published. In order to study the effect of first stage precooling temperature, related characteristics on performance are experimentally investigated. It shows that at high input power, when the precooling temperature is lower than 110 K, its effect on second stage temperature is quite small. There is also the evident effect of precooling temperature on pulse tube temperature distribution; this is for the first time that author notice the phenomenon. The mean working pressure is investigated and the 12.8 K lowest temperature with 500 W input power and 1.22 MPa average pressure have been gained, this is the lowest reported temperature for high frequency two-stage PTCS. Simulation has reflected upper mentioned typical features in experiments. |
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