.ThermalSeparation.Media.Propane_Pentane_Liq

Information

This model calculates medium properties for water in the liquid, gas and two phase regions according to the IAPWS/IF97 standard, i.e., the accepted industrial standard and best compromise between accuracy and computation time. For more details see Modelica.Media.Water.IF97_Utilities. Three variable pairs can be the independent variables of the model:

1. Pressure p and specific enthalpy h are the most natural choice for general applications. This is the recommended choice for most general purpose applications, in particular for power plants.
2. Pressure p and temperature T are the most natural choice for applications where water is always in the same phase, both for liquid water and steam.
3. Density d and temperature T are explicit variables of the Helmholtz function in the near-critical region and can be the best choice for applications with super-critical or near-critial states.

In some cases additional medium properties are needed. A component that needs these optional properties has to call one of the functions listed in Modelica.Media.UsersGuide.MediumUsage.OptionalProperties and in Modelica.Media.UsersGuide.MediumUsage.TwoPhase.

Many further properties can be computed. Using the well-known Bridgman's Tables, all first partial derivatives of the standard thermodynamic variables can be computed easily.

Contents

Name	Description
BaseProperties
CalcSpecificEnthalpy
HenryCoefficient
DiffusionCoefficient
ActivityCoefficient	calculates the activity coefficient for each component in the liquid phase
FugacityCoefficient	calculates the fugacity coefficient at the saturation point for each component in the liquid phase
ThermodynamicFactor
EvaporationEnthalpy