NASA/GSFC 80 K Long-Life, Low Vibration Mechanical Cryocooler Performance Test Program Results

  • L. G. Naes
  • G. M. Pryor
  • I. E. Spradley
  • D. Isaac
  • R. L. von Savoye
  • L. M. Sparr

Abstract

To meet a variety of future cooling needs, Lockheed is developing a long-life, low vibration split-Stirling cycle mechanical cryocooler for the NASA Goddard Space Flight Center. Design requirements provide 0.8-W cooling at 80 K, while minimizing the specific power of the system and maintaining the exported vibration levels to less than 0.02 lb.

The cryocooler design is based on the flexure spring and gas gap seal design originally developed by Oxford University and enhanced by Lockheed and Lucas Aerospace from 1987 through 1993. The NASA 80-K baseline, however, incorporates additional design improvements that increase the cryocooler cooling capability and thus strengthens its performance efficiency above that of previous designs. These improvements are achieved through precise control of the compressor and the displacer moving masses by means of the Lockheed-developed digital error correction system (DECS), where vibration control is achieved through either position control (P-DECS), cancellation of residual acceleration (A-DECS), or cancellation of residual force (F-DECS). All these options have been built into the 80-K controller.

Keywords

Compressor Stroke NASA Goddard Space Electronic Controller Residual Acceleration Stirling Cycle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    “Prediction of Natural Frequency of the NASA 80 K Cooler by the Stirling Refrigerator Performance Model” by S. W. K Yuan, L. G. Naes, and T. C. Nast. Cryogenics, Volume 34, Number 5, 1994, Pages 383-388.Google Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • L. G. Naes
    • 1
  • G. M. Pryor
    • 1
  • I. E. Spradley
    • 1
  • D. Isaac
    • 1
  • R. L. von Savoye
    • 1
  • L. M. Sparr
    • 2
  1. 1.Research & Development DivisionLockheed Missiles & Space Company, Inc.Palo AltoUSA
  2. 2.NASA Goddard Space Flight CenterGreenbeltUSA

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