Author:
Chen H Y,Shang J,Wang J Z,Liu S H,Lv C,Wu J H
Abstract
Abstract
Large-scale helium cryogenic refrigeration facilities are indispensable equipment for many cutting-edge researches, and the cold compressor is the most advantageous pressurization scheme in superfluid helium systems with capacity of more than 200 watts. Due to the extremely low operating temperature zone of the cold compressor, the efficiency of the compression process decreases as the external heat leakage increases, especially when building systems with greater cooling capacity, this phenomenon becomes more significant. In order to reduce the influence of heat leakage, a conjugate heat transfer analysis is carried out on the cold compressor using commercial CFD software, and the internal structures, including thermal anchor, thermal insulation materials, are analysed and optimized base on the simulations.
Reference5 articles.
1. Design of cold compressor systems in terms of operational and economical aspects;Decker;proceedings of the IOP Conference Series: Materials Science and Engineering,2015
2. Impact of external heat transfer on the performance of a cold compressor used in superfluid helium system;Dong;Cryogenics,2020
3. Experimental Results Obtained with Air Liquide Cold Compression System: CERN LHC and SNS Projects;Delcayre;Advances in Cryogenic Engineering. USA American Institute of Physics,2006
4. Analysis of internal temperature distribution and its total parasitic heat leak for a cryogenic cold Compressor;Dong;Cryogenic Engineering Conference,2020