MT27, 27th International Conference on Magnet Technology

Investigation of HTS Power Devices Cooled by LN2/CF4 Mixture

TUE-PO1-513-09

16 Nov 2021, 13:15

2h

Fukuoka Convention Center

Poster TUE-PO1-513 SMES, Transformers, Wireless Power Transfer

Speaker

Dr Qingquan Qiu (Institute of Electrical Engineering, Chinese Academy of Sciences)

Description

LN2/CF4 mixture would be an effective coolant and insulating medium of high-temperature superconducting (HTS) magnets and power devices, which could provide a cryogenic environment in the temperature range of 50 to 100 K and serve as a liquid dielectric. In this paper, recent progress concerning the LN2/CF4-cooled HTS power devices including superconducting fault current limiter (SFCL) and superconducting magnetic energy storage (SMES) is presented with the emphasis focused on their improved electromagnetic characteristics and thermal stability compared with those devices immersed in liquid nitrogen. In addition, the characteristics of SFCL and SMES prototypes immersed in the LN2/CF4 mixture are further analyzed from the aspect of thermal and electrical properties of LN2/CF4 medium.