Cryogenic supply system for high-temperature superconductivity devices (SCR 001)
Creation of an autonomous and efficient cryogenic supply system with a resource of continuous operation of at least 30,000 hours for use in high-current devices (cables, electric motors, generators, transformers, etc.) using high-temperature superconductivity is a key task for the widespread introduction of promising technologies in industry. The study gives the results of the work on creation of a cryogenic supply system for SCR 001 with a cooling capacity of 1,5...2,5 kW at a temperature of 65Kfor local and distributed cryogenic systems. SCR 001 circulates liquid nitrogen at a temperature of 65...75K in a closed circuit of cooling superconductors and ensures the operation of electric motors, generators, etc. The refrigerator KR 001 has been built with a cooling capacity of 1...2,5 kW at 65 K. The refrigerator operates by the gas refrigerating inverted Brighton cycle with radial turbomachines. The design features of the cryorefrigerator are as follows: neon is the working fluid in the gas circuit; turbochargers and turboexpander have gas-dynamic bearings; cooling of the working fluid (neon) after compression occurs in compact plate-finned end heat exchangers with the help of antifreeze, and cooling of antifreeze is due to the air in the heat exchanger by means of fans.
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