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An experimental investigation of how the heat pumping mechanism in a pulse tube changes with frequency.

Author(s) : EVANS B. E., RICHARDSON R. N.

Summary

The mechanism of surface heat pumping that is responsible for thermal transport in a basic pulse tube is widely accepted and may be reconciled with the ideal representation of a refrigerator as a second law device. At the higher frequencies at which orifice pulse tubes operate the time available for heat exchange between the gas and tube wall is very short. This suggests that heat pumping is due to some other mechanism primarily within the pulsating gas column rather than by surface heat pumping. An apparatus has been constructed which allows a single pulse tube to be operated over a frequency range from 1 to more than 50 hertz in attempt to detect the transition between that heat pumping mechanisms.

Details

  • Original title: An experimental investigation of how the heat pumping mechanism in a pulse tube changes with frequency.
  • Record ID : 1998-1439
  • Languages: English
  • Source: Cryocoolers 9. Proceedings of the International Cryocooler Conference.
  • Publication date: 1996/06/25
  • Document available for consultation in the library of the IIR headquarters only.

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