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Cold-tip off-state conduction loss of miniature Stirling cycle cryocoolersFor redundant miniature Stirling-cycle cryocoolers in space applications, the off-state heat conduction down the coldfinger of one cooler is a parasitic heat load on the other coolers. At JPL, a heat flow transducer specifically designed to measure this load has been developed, and measurements have been performed on the coldfinger of a British Aerospace 80 K Stirling cooler with the tip temperature ranging between 40 and 170 K. Measurements have also been made using a transient warmup technique, where the warmup rates of the coldtip under various applied heat loads are used to determine the static conduction load. There is a difference between the results of these two methods, and these differences are discussed with regard to the applicability of the transient warmup method to a nonoperating coldfinger.
Document ID
19930064626
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kotsubo, V.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Johnson, D. L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ross, R. G., Jr.
(JPL Pasadena, CA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1991
Publication Information
Publication: In: Advances in cryogenic engineering. Vol. 37B - Proceedings of the 1991 Cryogenic Engineering Conference, Univ. of Alabama, Huntsville, June 11-14, 1991 (A93-48578 20-37)
Publisher: Plenum Press
Subject Category
Engineering (General)
Accession Number
93A48623
Distribution Limits
Public
Copyright
Other

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