Design of Indirect Closed-Cycle Cooling Scheme Coupled With a Cryocooler for a 3-MW-Class High-Temperature Superconducting Synchronous Motor

• Published in: IEEE transactions on applied superconductivity Vol. 26; no. 4; pp. 1 - 4
• Main Authors: Le, Thanh Dung, Kim, Ji Hyung, Kim, Do Jin, Boo, Chang Jin, Jo, Young Sik, Yoon, Yong Soo, Yoon, Kyung Yong, Choi, Yoon Hyuck, Lee, Haigun, Kim, Ho Min
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: close-cycle cooling concept; Cooling; Cryogenics cooling system; Electron tubes; Heat; Heating; high-temperature superconducting (HTS) motor; High-temperature superconductors; Rotors; Temperature; thermal characteristics; Torque; Close-cycle cooling concept; high-temperature superconducting (HTS) motor; cryogenics cooling system; thermal characteristics
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2016.2544812

The increase in the heat generated from high-temperature superconducting (HTS) rotating components limits the applicability of a cooling method. Hence, a liquid cooling and convection cooling scheme for high-heat-flux applications has gained interest. An indirect closed-cycle cooling scheme coupled with a cryocooler is an alternative cooling technique, in which the heat of vaporization is transferred from an evaporator to a condenser with a relatively small temperature difference. The cooling system of a demonstrative 3-MW-class HTS motor is presented in this paper. A cryogen was used to maintain uniform temperature of the field coil; the maximum temperature of the HTS coils was approximately 30 K during normal operation. The operation process of the cooling system is illustrated, and the main circulation parameters, namely, cryogen flow rate and the heat flux of cooling system, are investigated.