Start-Up Behavior of Pulse Tube Refrigerators

  • M. Shiraishi
  • Y. Kim
  • K. Seo
  • M. Murakami
Part of the A Cryogenic Engineering Conference Publication book series (ACRE, volume 41)

Abstract

A start-up behavior of a pulse tube refrigerator is experimentally investigated to gain a better understanding of the basic refrigeration mechanism. Two typical types of pulse tube refrigerators, which are a basic and an orifice pulse tube, are used. The pressure oscillation is introduced suddenly into the pulse tube under the uniform temperature, and the transient changes of gas temperature, wall temperature and heat out at the hot end are obtained as a time history from an onset of the pressure oscillation to an ultimate state that can be obtained after a long time. It is found that after only two cycles from the onset of pressure oscillation, the difference of gas temperature between the cold and the hot ends appears and it reaches to 65% level of the difference at the ultimate state. The heat out becomes stable after several hundreds of seconds. It is also found that the change of temperature at the very beginning of the oscillation is not adiabatic. Significant differences in the start-up behavior between a basic and an orifice pulse tube did not appear.

Keywords

Foam Transportation Helium Polyurethane Refrigeration 

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Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • M. Shiraishi
    • 1
  • Y. Kim
    • 1
  • K. Seo
    • 2
  • M. Murakami
    • 2
  1. 1.Mechanical Engineering LaboratoryTsukuba, Ibaraki, 305Japan
  2. 2.University of TsukubaTsukuba, Ibaraki, 305Japan

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