Open AccessRefrigerant circulation system for cooling a HTS coil
Author(s) -
Yuanlai Xie,
S. Nagai,
T. Okamura,
Naoki Hirano
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1559/1/012094
Subject(s) - refrigerator car , electromagnetic coil , refrigerant , helium , heat exchanger , materials science , thermodynamics , refrigeration , water cooling , cooling capacity , lambda point refrigerator , heat transfer , nuclear engineering , thermal conduction , superconducting magnet , gas compressor , mechanics , liquid helium , chemistry , composite material , electrical engineering , physics , engineering , organic chemistry
When using the superconducting technology industrially, it is not always possible to install a refrigerator near a high temperature superconducting coil for cooling it. In the method using heat conduction cooling, cooling result as expected cannot be obtained due to temperature difference between a refrigerator and a superconducting coil via a heat transfer plate when the distance of the refrigerator and the coil is long. Therefore, a method of cooling a superconducting coil by circulating helium gas has been proposed. Helium gas discharged by a compressor at room temperature is cooled by a pre-cooling heat exchanger, thereafter cooled by a GM refrigerator. The cold helium gas cools the coil and current leads. In this study, the helium circulation cooling system was investigated by using one-dimensional numerical analysis and experiment at different helium gas mass flows.