Baseline design of a sorption-based Joule-Thomson cooler chain for the METIS instrument in the E-ELT |
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| Affiliation: | 1. Institute of Process Equipment, Zhejiang University, Zheda Rd. 38, 310027 Hangzhou, PR China;2. Faculty of Science & Technology, University of Twente, Drienerlolaan 5, 7522NB Enschede, The Netherlands;3. Kryoz Technologies BV, Institutenweg 25, 7521PH Enschede, The Netherlands;4. SuperACT, Marterstraat 66, 7559AJ Hengelo, The Netherlands;5. Airbus Defence and Space Netherlands B.V., P.O. Box 32070, 2303DB Leiden, The Netherlands;1. Univ. Grenoble Alpes, INAC-SBT, F-38000 Grenoble, France;2. CEA, INAC-SBT, F-38000 Grenoble, France;3. CNES, 18 avenue Edouard Belin, 31401 Toulouse Cedex 9, Toulouse, France;1. Space Research National Institute, Combustion & Propulsion Associated Laboratory, Brazil;2. University of São Paulo, Lorena Engineering School, Materials Engineering Dept., Brazil;3. University of São Paulo, Lorena Engineering School, Chemical Engineering Dept., Brazil;1. College of Chemistry and Chemical Engineering, Chongqing University of Technology, 69 Hongguang Road, Lijiatuo, Banan District, Chongqing 400054, PR China;2. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, PR China;3. Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, PR China;4. School of Energy Research, Xiamen University, Xiamen 361005, PR China;1. Laboratory for Quantum Engineering and Micro–Nano Energy Technology, Department of Physics, Xiangtan University, Xiangtan, Hunan 411105, China;2. Beijing Computational Science Research Centre, Beijing 100084, China;3. Laboratory of Thin Film Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, 100084 Beijing, China;2. Faculty of Science and Technology, University of Twente, 7500 AE Enschede, the Netherlands |
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| Abstract: | METIS, the Mid-Infrared E-ELT Imager and Spectrograph, is one of the proposed instruments in E-ELT (European Extremely Large Telescope). Its infrared detectors require multiple operating temperatures below 77 K. Therefore, active coolers have to be deployed to provide sub-liquid-nitrogen (sub-LN2) temperature cooling. However, the sensitive imaging optical detecting system also demands very low levels of vibration. Thus, the University of Twente proposed a vibration-free cooling technique based on physical sorption. In this paper, we describe the baseline design of such a sorption-based Joule-Thomson cooler chain for the METIS instrument, that is able to deliver cooling powers of 0.4 W at 8 K, 1.1 W at 25 K and 1.4 W at 40 K from a 70-K heat sinking. This design is based on working fluid selection, cascading cooler stages and operating parameter optimization. Also, the performance of the resulting cooler design is analyzed. |
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| Keywords: | Vibration free Sorption compressor Joule-Thomson cooler E-ELT METIS Heat switch |
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