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A model for parametric analysis of pulse tube losses in pulse tube refrigerators.

Author(s) : DODSON C., RAZANI A., ROBERTS T.

Summary

A loss parameter is introduced into the first order thermodynamic model of a pulse tube consisting of a hot, a cold and an adiabatic section to quantify the pulse tube irreversibility. The entire pulse tube is assumed to be adiabatic while the loss parameter simulates its irreversibility. It is shown that the primary effect of the parameter is to modify the temperature as a function of time in the cold and hot sections of the pulse tube as well as have a secondary effect on the mass flow rate as a function of time at both ends of the pulse tube. The model is incorporated into a first order model of an Inertance tube pulse tube refrigerator (ITPTR). A distributed parameter model of the inertance tube is developed to simulate the fluid flow in the tube and to quantify the phase shift between the mass flow rate and the pressure at the tube's entrance. The effect of the loss parameter in the pulse tube on the energy and exergy flow in the ITPTR is investigated. The irreversibility distribution of the ITPTR, including the pulse tube, is quantified and the effect of the loss parameter on its cooling capacity is presented.

Details

  • Original title: A model for parametric analysis of pulse tube losses in pulse tube refrigerators.
  • Record ID : 2008-1064
  • Languages: English
  • Publication date: 2006/06/14
  • Source: Source: Proc. 14th int. Cryocooler Conf., Annapolis, MD
    293-300; fig.; tabl.; 11 ref.

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