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A methodology to design a capillary tube as an expansion device of household refrigeration systems.

Author(s) : DRIESSEN J. L., PEREIRA R. H., MELO C., FERREIRA R. T. da Silva

Summary

The paper presents an experimental study on capillary tubes commonly used as expansion devices in household refrigerators and freezers. The experiments were performed with three refrigerants, namely CFC-12, HFC-134a and HC-600A and at different condension pressures and levels of subcooling under choked flow conditions. Eight capillaries with different combinations of lengths, diameters and tube roughnesses were used. This eventually led to the development of five non-dimensional numbers that are combined together to form correlations to predict the mass flow rates for different refrigerants.

Details

  • Original title: A methodology to design a capillary tube as an expansion device of household refrigeration systems.
  • Record ID : 1998-2870
  • Languages: English
  • Source: Proceedings of the '97 International Compressor Technique Conference.
  • Publication date: 1997/08/16
  • Document available for consultation in the library of the IIR headquarters only.

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