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Systems Considerations for Cryogenic Thermal Switch Development

  • David C. Hustvedt
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 31)

Abstract

One approach for increasing the reliability of cryogenic cooling systems using mechanical cryocoolers is to connect several cryocoolers in parallel using thermal switches to isolate failed or standby machines. In this paper, simplified analytical thermal models are used to investigate thermal switch performance requirements and evaluate the effect of thermal switches on system efficiency. Results show that switch characteristics such as switching ratio and thermal resistance determine cryocooler performance requirements. In order to minimize system input power requirements switch characteristics must be carefully matched to the configuration of the cryocooler system.

Keywords

Input Power Switch Resistance Switch Characteristic Switch Design Thermal Switch 
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References

  1. 1.
    A. L. Johnson, Spacecraft borne long life cryogenic refrigeration status and trends, Cryogenics, 7: 339 (1983).CrossRefGoogle Scholar
  2. 2.
    E. T. Mahefky and W. L. Haskin, Thermal management for surveillance spacecraft, “Ninth DARPA Strategic Space Symposium,” Monterey, California (1983).Google Scholar
  3. 3.
    T. Nast, G. Bell, and C. Barnes, Development of a gas gap cryogenic thermal switch, “Advances in Cryogenic Engineering,” Vol. 27, Plenum Press, New York (1982), p. 1117.Google Scholar

Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • David C. Hustvedt
    • 1
  1. 1.Ball Aerospace Systems DivisionBoulderUSA

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