Development and Testing of a Miniature Joule-Thomson Refrigerator with Sintered Powder Heat Exchanger

  • M. Chorowski
  • E. Bodio
  • M. Wilczek
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 39)


Powder metallurgy technology enables large scale fabrication of low cost miniature recuperative counterflow heat exchangers. The sintered metal powder (SMP) heat exchanger can be a basic component of miniature Joule-Thomson refrigerators. A high pressure gas channel is formed by a capillary tube which is sintered to ball shaped metal grains where the inner grain volume creates a low pressure gas channel. Capillary tube finning and soldering have been eliminated. The supply gas pressure can be as high as the inversion pressure. Cooling power of SMP refrigerators can be 1 W or more. The overall heat transfer coefficients are close to the measured values for Hampson type heat exchangers. SMP refrigerators can be significantly miniaturized in comparison with Hampson ones.


Heat Transfer Coefficient Heat Exchanger Coiled Tube Large Scale Fabrication Heat Exchange Area 
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Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • M. Chorowski
    • 1
  • E. Bodio
    • 1
  • M. Wilczek
    • 1
  1. 1.Institute of Power Engineering and Fluid MechanicsTechnical University of WroclawPoland

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