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Monitoring Rapidly Changing Temperatures of the Oscillating Working Fluid in a Regenerative Refrigerator

  • Wayne Rawlins
  • Ray Radebaugh
  • K. D. Timmerhaus
Part of the Applications of Cryogenic Technology book series (APCT, volume 10)

Abstract

Characterization of an orifice pulse tube refrigerator requires measurements of the instantaneous gas temperatures at various locations in the refrigerator. This presents several challenges. The temperature probe has to fit inside a 3 mm diameter tube with minimum disturbance to the flow. Void volumes, introduced by placement of a temperature probe into the system, have to be kept at a minimum. The temperature sensing device has be robust to survive pressure waves and mass flows oscillating at frequencies of up to 30 Hz. It also must have a fast response time to monitor the rapidly changing temperatures in the system. The temperature resolution has to be on the order of 10 mK. This paper discusses rapid temperature measurements with both thin-foil thermocouples and fine-wire resistance thermometers. A 4 μm diameter tungsten wire was found to satisfy these diverse requirements.

Keywords

Temperature Probe Temperature Oscillation Tungsten Wire Test Volume Pulse Tube 
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.
    R. Radebaugh, Pulse tube refrigeration, a new type of cryocooler, Japanese Journal of Applied Physics Vol. 26 (1987), p. 2076Google Scholar
  2. 2.
    W. Rawlins and R. Radebaugh, An Apparatus for the measurement of regenerator performance in pulse tube refrigerators, in: “Advances in Cryogenic Engineering,” Vol. 35, R. Fast, ed., Plenum Press, New York (1990), p. 1213.Google Scholar
  3. 3.
    R. Radebaugh, D. Linenberger, and R. O. Voth, Methods for the measurement of regenerator ineffectiveness, in: “Refrigeration for Cryogenic Sensors and Electron Systems”, NBS special publication 607 (1981), p. 70.Google Scholar

Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • Wayne Rawlins
    • 1
  • Ray Radebaugh
    • 2
  • K. D. Timmerhaus
    • 1
  1. 1.Department of Chemical EngineeringUniversity of ColoradoBoulderUSA
  2. 2.National Institute of Standards and TechnologyChemical Engineering Science DivisionBoulderUSA

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