Pseudo-Pure Fluid Equations of State for the Refrigerant Blends R-410A, R-404A, R-507A, and R-407C

摘要: Pseudo-pure fluid equations of state explicit in Helmholtz energy have been developed to permit rapid calculation the thermodynamic properties refrigerant blends R-410A, R-404A, R-507A, and R-407C. The were fitted values calculated from a mixture model previous work for mixtures R-32, R-125, R-134a, R-143a. may be used calculate single-phase blends; dew bubble point are with aid additional ancillary saturation pressures. Differences between calculations pseudo-pure full on average 0.01%, all less than 0.1% density except critical region. For heat capacity speed sound, differences maximum 0.5%. Generally, these consistent accuracy available experimental data mixtures, comparisons given selected verify estimates. valid 200 450 K can extrapolated higher temperatures. Computations new up 100 times faster phase equilibria at temperature 5 points input conditions pressure.