Refrigeration – Refrigeration producer – Evaporator – e.g. – heat exchanger
Patent
1976-08-09
1978-03-07
Capossela, Ronald C.
Refrigeration
Refrigeration producer
Evaporator, e.g., heat exchanger
250332, 313 22, F25B 1900
Patent
active
040772314
ABSTRACT:
A closed cycle refrigeration (CCR) system is disclosed for providing cooling at different temperatures to different parts of a maser. The CCR includes a first station for cooling the maser's parts, except the amplifier portion, to 4.5.degree. K. The CCR further includes means with a 3.0.degree. K station for cooling the maser's amplifier to 3.0.degree. K and, thereby, increases the maser's gain and/or bandwidth by a significant factor. The means which provide the 3.0.degree. K cooling include a pressure regulator, heat exchangers, an expansion valve, and a vacuum pump, which coact to cause helium, provided from a compressor, to liquefy and thereafter expand so as to vaporize. The heat of vaporization for the helium is provided by the maser amplifier, which is thereby cooled to 3.0.degree. K.
REFERENCES:
patent: 3878691 (1975-04-01), Asztalos
patent: 3882687 (1975-05-01), Asztalos et al.
patent: 3894403 (1975-07-01), Longsworth
Fletcher James C. Administrator of the National Aeronautics and Space
Wiebe Ervin R.
Capossela Ronald C.
Grifka Wilfred
Manning John R.
Mott Monte F.
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