This information is part of the Modelica Standard Library maintained by the Modelica Association.

This function calculates the density of R134a from the state variables p (absolute pressure) and h (specific enthalpy). The density is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

d = density_ph(p, h, phase)

p	Type: AbsolutePressure (Pa) Description: Pressure
h	Type: SpecificEnthalpy (J/kg) Description: Specific enthalpy
phase	Default Value: 0 Type: Integer Description: 2 for two-phase, 1 for one-phase, 0 if not known

d	Type: Density (kg/m³) Description: Density