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Understanding pulse tube refrigeration.

Author(s) : LEE J. M., TIMMERHAUS K. D.

Summary

The pulse tube refrigerator is a device that produces Stirling cycle refrigeration without the need for a mechanically driven displacer or expander. Instead, the displacer is replaced with an orifice, a reservoir, and an open tube. The purpose of the orifice and reservoir is to reproduce the phase shifting mechanism of the Stirling's displacer. The purpose of the tube is to physically separate the cold end from the hot end, and to act as an "enthalpy flow tube", that is, a path that allows the flow of enthalpy from the cold to the hot end. It is this flow of enthalpy that produces refrigeration. Enthalpy flow is calculated by time-averaging the product of periodic mass flow and periodic pressure of the working gas. The paper examines the pulse tube from a differential transport perspective, discusses a linearised inelastic analysis of the governing equations, and presents results as applied to pulse tubes.

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Details

  • Original title: Understanding pulse tube refrigeration.
  • Record ID : 2000-1139
  • Languages: English
  • Source: 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
  • Publication date: 1999/09/19

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