Refrigeration – Gas compression – heat regeneration and expansion – e.g.,...
Patent
1991-04-02
1992-12-22
Capossela, Ronald C.
Refrigeration
Gas compression, heat regeneration and expansion, e.g.,...
62 513, 60520, F25B 900
Patent
active
051725541
ABSTRACT:
A cryogenic refrigerator cools a heat source by cyclically concentrating and diluting the amount of .sup.3 He in a single phase .sup.3 He-.sup.4 He solution. The .sup.3 He in superfluid .sup.4 He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid .sup.3 He at an initial concentration in superfluid .sup.4 He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of .sup.4 He while restricting passage of .sup.3 He. The .sup.3 He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.
REFERENCES:
patent: 3195322 (1965-07-01), London
patent: 3896630 (1975-07-01), Severijns et al.
patent: 4136526 (1979-01-01), Chanin et al.
patent: 4136531 (1979-01-01), Staas et al.
patent: 4300360 (1981-11-01), Chanin et al.
patent: 4457135 (1984-07-01), Hakaruku et al.
patent: 4499737 (1985-02-01), Binnig et al.
patent: 4713942 (1987-12-01), Hofmann
patent: 4770006 (1988-09-01), Roach et al.
patent: 4953366 (1990-09-01), Swift et al.
John C. Wheatley, "Dilute Solutions of .sup.3 He in .sup.4 He at Low Temperatures," 36 Am. J. Phys. No. 3, pp. 181-210, Mar. 1986).
Ray Radebaugh, "Pulse Tube Refrigeration-A New Type of Cryocooler," 26 Jpn. J. Appl. Phys., Suppl. 26-3, pp. 2076-2087 Jun. 1987.
Kotsubo Vincent Y.
Swift Gregory W.
Capossela Ronald C.
Gaetjens Paul D.
Moser William R.
The United States of America as represented by the United States
Wilson Ray G.
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