Title:
METHOD AND APPARATUS OF CRYOGENIC COOLING FOR HIGH TEMPERATURE SUPERCONDUCTOR DEVICES
Document Type and Number:
WIPO Patent Application WO2005001348
Kind Code:
A3
Abstract:
A method and apparatus for providing cryogenic cooling to HTS devices (24), in particular those that are used in high-voltage electric power applications. The method involves pressurizing liquid cryogen (46, 48) to above one atmospheric pressure to improve its dielectric strength, while sub-cooling the liquid cryogen to below its saturation temperature in order to improve the performance of the HTS components (24) of the device. An apparatus (10) utilizing such a cooling method consists of a vessel that contains a pressurized gaseous cryogen region (44) and a sub-cooled liquid cryogen bath, a liquid cryogen heating (52) coupled with a gaseous cryogen venting scheme (30) to maintain the pressure of the cryogen to a value in a range that corresponds to optimum dielectric strength of the liquid cryogen, and a cooling system that maintains the liquid cryogen (46, 48) at a temperature below its boiling point to improve the performance of HTS materials (24) used in the device (10).
Inventors:
XING YUAN
SUSUMU MINE
SUSUMU MINE
Application Number:
PCT/US2004/019964
Publication Date:
June 16, 2005
Filing Date:
June 15, 2004
Export Citation:
Assignee:
SUPERPOWER INC (US)
International Classes:
F17C1/00; F17C7/04; F25B19/00; F25D19/00; F25D23/12; H01F6/04; F25D; (IPC1-7): F25B19/00; F25D23/12
Foreign References:
| US6629426B2 | 2003-10-07 | |||
| US5150578A | 1992-09-29 | |||
| US5220800A | 1993-06-22 | |||
| US3374641A | 1968-03-26 | |||
| US6501970B2 | 2002-12-31 |
Other References:
See also references of EP 1644674A4
Download PDF:
Previous Patent: METHOD AND APPARATUS FOR INDIVIDUAL FROZEN BEVERAGE MOLD AND DISPENSER
Next Patent: A HANDLE
Next Patent: A HANDLE