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Cascade Joule-Thomson refrigeratorsThe design criteria for cascade Joule-Thomson refrigerators for cooling in the temperature range from 300 K to 4.2 K were studied. The systems considered use three or four refrigeration stages with various working gases to achieve the low temperatures. Each stage results in cooling to a progressively lower temperature and provides cooling at intermediate temperatures to remove the substantial amount of parasitic heat load encountered in a typical dewar. With careful dewar design considerable cooling can be achieved with moderate gas flows. For many applications, e.g., in the cooling of sensitive sensors, the fact that the refrigerator contains no moving parts and may be remotely located from the gas source is of considerable advantage. A small compressor suitable for providing the gas flows required was constructed.
Document ID
19840007286
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tward, E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Steyert, W. A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1983
Publication Information
Publication: NASA. Goddard Space Flight Center Refrig. for for Cryogenic Sensors
Subject Category
Engineering (General)
Accession Number
84N15354
Funding Number(s)
CONTRACT_GRANT: NAS7-918
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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