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A method to estimate the circulated composition in refrigeration and heat pump systems using zeotropic refrigerant mixtures.

Author(s) : JOHANSSON A., LUNDQVIST P.

Type of article: Article, IJR article

Summary

In recent years a number of refrigerant mixtures have appeared on the market. Some of these refrigerant mixtures are zeotropic, e.g. R407C and R417A. When zeotropic refrigerant mixtures are used in a system, the circulated composition may change from the nominal to a different composition. The changes in composition may be due to leakage or hold-ups of liquid or vapour phase, different solubility in the oil by the different components, or the fact that the system has been charged in an incorrect way. For the understanding of performance measurements made on systems, it is important to know the composition of the circulated refrigerant mixture. A promising method to estimate the circulated composition has been developed. The method has been applied and evaluated on a well equipped lab rig at the Department of Energy Technology at the Royal Institute of Technology. The tests show that it is possible to estimate the composition of the circulated refrigerant mixture to within 21% by measuring only two temperatures and pressures.

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Format PDF

Pages: 798-808

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Details

  • Original title: A method to estimate the circulated composition in refrigeration and heat pump systems using zeotropic refrigerant mixtures.
  • Record ID : 2002-1234
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 24 - n. 8
  • Publication date: 2001/12

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