Refrigeration – Storage of solidified or liquified gas – Including cryostat
Reexamination Certificate
2005-02-15
2005-02-15
Doerrler, William C. (Department: 3744)
Refrigeration
Storage of solidified or liquified gas
Including cryostat
C062S045100, C062S259200
Reexamination Certificate
active
06854276
ABSTRACT:
A method and apparatus for providing cryogenic cooling to HTS devices, in particular those that are used in high-voltage electric power applications. The method involves pressurizing liquid cryogen 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 of the device. An apparatus utilizing such a cooling method consists of a vessel that contains a pressurized gaseous cryogen region and a sub-cooled liquid cryogen bath, a liquid cryogen heating coupled with a gaseous cryogen venting scheme 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 at a temperature below its boiling point to improve the performance of HTS materials used in the device.
REFERENCES:
patent: 3374641 (1968-03-01), Corvino et al.
patent: 3518591 (1970-06-01), Zar
patent: 3588312 (1971-06-01), Burnier
patent: 4432216 (1984-02-01), Matsuda et al.
patent: 5150578 (1992-09-01), Oota et al.
patent: 5220800 (1993-06-01), Muller et al.
patent: 5293750 (1994-03-01), Tamura et al.
patent: 5450266 (1995-09-01), Downie
patent: 5477693 (1995-12-01), Morita
patent: 5661980 (1997-09-01), Gallivan
patent: 5749243 (1998-05-01), Lester
patent: 5956957 (1999-09-01), Lowry et al.
patent: 6501970 (2002-12-01), Heise et al.
patent: 6629426 (2003-10-01), Paul et al.
patent: 20030021074 (2003-01-01), Yuan
Eddie Leung, “Surge Protection for Power Grids,” IEEE Spetrum, Jul. 1997, pp 26-30 vol. 34 No. 7, IEEE, New York USA.
M David Burghardt, “Engineering Thermodynamics With Applications,” 2nd Edition, 1982, p. 63, Harper and Row, New York.
Jefferies and K.N. Mathes, “Dielectric Loss and Voltage Breakdown in Liquid Nitrogen and Hydrogen,” IEEE Spectrum, 1970, pp. 83-91, vol. EI-5, IEEE, New York USA.
Mine Susumu
Yuan Xing
Abarca, Esq. Enrique
Doerrler William C.
Rideout, Jr. Esq. George L.
SuperPower, Inc
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