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DOI: 10.5445/IR/1000075570

Numerical and Experimental Studies of a Two-Stage Pulse Tube Cryocooler Working Around 20K

Wang, Xiaotao; Pang, Xiaomin; Chen, Shuai; Dai, Wei; Luo, Ercang

Abstract:
The absence of cold moving parts in pulse tube cryocoolers has allowed it to has advantages of low vibration, high reliability, and low cost, which can meet requirements of many high-temperature superconducting applications. However, Stirling type pulse tube cryocoolers working around 20 K are still not commerally aviable due to low efficiency and low power density. With Comprehensive consideration of higher specific power of whole system and performance in relative lower working temperature of 20K, this paper proposes a thermally coupled two stage co-axial pulse tube cryocooler to pursue several watts cooling power around 20K.At the first stage, an ultrahigh frequency operation of 100 Hz is utilized to precoo the second stage for seeking a higher power density. At the second stage, a relative lower frequency of around 30Hz is used for improving system efficiency. Firstly, a quasi-one-dimensional numeric model based on the thermoacoustic theory is used to optimize the operating and structure parameters and some simulation results are briefly introduced. The influences of different phase shifters such as doule-inlet and room temperat ... mehr


Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Vortrag
Jahr 2017
Sprache Englisch
Identifikator URN: urn:nbn:de:swb:90-755707
KITopen ID: 1000075570
HGF-Programm 37.06.02; LK 01
Erschienen in 2nd International Workshop on Cooling Systems for HTS Applications (IWC-HTS), Karlsruhe, Germany, 13th - 15th September 2017
Bemerkung zur Veröffentlichung Author affiliation: Key Laboratory of Cryogencis, Technical Institute of Physics and Chemistry, CAS
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