Abstract
Self — consistent circuit analog thermal models that can be run in commercial spreadsheet programs on personal computers have been created to calculate the cooldown and steady state performance of cryogen cooled dewars. The models include temperature dependent conduction and radiation effects. The outputs of the models provide temperature distribution and dewar performance information. These models have been used to analyze the SIRTF Telescope Test Facility (STTF). The facility has been brought on line for its first user, the Infrared Telescope Technology Testbed (ITTT), for the Space Infrared Telescope Facility (SIRTF) at JPL. The model algorithm as well as a comparison between the models’ predictions and actual performance of this facility will be presented.
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References
T. C. Nast, “A review of multilayer insulation, theory, calorimeter measurements, and applications”, Recent Advances in Cryogenic Engineering, Vol. 267, pp. 29– 43, 1993.
I. E. Spradley, T. C. Nast, and D.J. Frank, “Experimental studies of MLI systems at very low boundary temperatures”, Recent Advances in Cryogenic Engineering, Vol. 35, pp. 477– 485, 1990.
More than a single layer has been shown ineffective at low temperatures. See I. E. Spradley, T. C. Nast, and D.J. Frank, “Experimental studies of MLI systems at very low boundary temperatures”, Recent Advances in Cryogenic Engineering, Vol. 35, pp. 477– 485, 1990.
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© 1996 Plenum Press, New York
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Nash, A.E. (1996). Simple Spreadsheet Thermal Models for Cryogenic Applications. In: Kittel, P. (eds) Advances in Cryogenic Engineering. A Cryogenic Engineering Conference Publication, vol 41. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0373-2_250
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DOI: https://doi.org/10.1007/978-1-4613-0373-2_250
Publisher Name: Springer, Boston, MA
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