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Pitfalls in experimental and analytical evaluation of zeotropic refrigerant alternatives.

Author(s) : LUNDQVIST P. G.

Summary

Refrigerant retrofit to environmentally benign refrigerants are often evaluated experimentally in laboratories or under field-like conditions. The analysis of these measurements may be handicapped by lack of relevant thermophysical property data due to composition changes for the refrigerant. The paper addresses this problem for a number of possible causes to composition changes. A thermodynamic model able to cope with the phenomena is used to estimate possible errors during analysis for entities such as UA-values and compressor efficiencies. Sampling of refrigerant for gas chromatography is an excellent complement to measurements of performance if a correct sample is taken. Sampling of liquid refrigerant should therefore be avoided in favour for gas sampling.

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Details

  • Original title: Pitfalls in experimental and analytical evaluation of zeotropic refrigerant alternatives.
  • Record ID : 1998-3363
  • Languages: English
  • Source: Emerging trends in refrigeration and air-conditioning.
  • Publication date: 1998/03/18
  • Document available for consultation in the library of the IIR headquarters only.

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