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Calculation of thermodynamic properties of R407C and R410A by the Martin-Hou equation of state. 1. Theoretical development.

Author(s) : MONTE F. de

Type of article: Article, IJR article

Summary

A theoretical development of the thermodynamic properties of two mixtures of HFC refrigerants i.e. R407C and R410A (in the superheated vapour state), is carried out. The modelling is based on the Martin-Hou equation of state, which has long been used for pure HFCs (e.g. R134a) with good results. Since R407C and R410A are very well investigated refrigerants, the analytical procedure here derived concerns with those thermodynamic properties of R407C and R410A (in the superheated state) that are not published in the current specialised literature. They are: compressibility factor, isentropic and isothermal compressibility, volume expansitivity, isentropic and isothermal exponent, speed of sound and Joule-Thomson coefficient. These properties may be used as a theoretical basis for research into the optimal HFC-mixture for compressor efficiency and for performing cycle calculations in the vapour-phase region for systems working with R407C and R410A.

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Pages: 306-313

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Details

  • Original title: Calculation of thermodynamic properties of R407C and R410A by the Martin-Hou equation of state. 1. Theoretical development.
  • Record ID : 2003-0044
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 25 - n. 3
  • Publication date: 2002/05

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