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Thermophysical properties of blends as alternatives for the refrigerants R22 and R502.

Author(s) : BENADE W., GUENTHER D., STEIMLE F.

Summary

The density and the specific heat capacity of subcooled liquids were measured in a certain range of temperatures at constant pressure. Empirical functional relations in polynomial form between the temperature and the measured quantities are established. The investigated liquids are binary or ternary mixtures of the components R134a, R125, R32 and R143a. The coefficients of the polynomial correlations are presented. These equations can be used for the calculation of the enthalpy of the saturated liquid. The predicted properties generally agree with the source data to about more or less 0.01% for the density correlation and more or less 0.2% for the heat capacity correlation. The accuracy of the measurements is better than 0.1% for the density and better than 1% for the heat capacity, differences between 1 and a maximum of 3% occur only at temperatures higher than 35 deg C.

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Format PDF

Pages: p 375-384

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Details

  • Original title: Thermophysical properties of blends as alternatives for the refrigerants R22 and R502.
  • Record ID : 1995-1473
  • Languages: English
  • Source: CFCs, the Day After.
  • Publication date: 1994/09/21

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