Buildings.Obsolete.Media.Interfaces.Choices

Types, constants to define menu choices

Information

Enumerations and data types for all types of fluids

Note: Reference enthalpy might have to be extended with enthalpy of formation.

Implementation

This package is a copy from the Modelica Standard Library (MSL) because MSL 3.2 stores this package in Modelica.Media.Interfaces.PartialMedium.Choices, whereas MSL 3.2.1 stores it in Modelica.Media.Interfaces.Choices because enumerations cannot be done through a partial package. The local copy has done to enable compatibility with both versions.

Package Content

Types and constants

  type IndependentVariables = enumeration(
    T "Temperature",
    pT "Pressure, Temperature",
    ph "Pressure, Specific Enthalpy",
    phX "Pressure, Specific Enthalpy, Mass Fraction",
    pTX "Pressure, Temperature, Mass Fractions",
    dTX "Density, Temperature, Mass Fractions") 
  "Enumeration defining the independent variables of a medium";

  type Init = enumeration(
    NoInit "NoInit (no initialization)",
    InitialStates "InitialStates (initialize medium states)",
    SteadyState "SteadyState (initialize in steady state)",
    SteadyMass "SteadyMass (initialize density or pressure in steady state)") 
  "Enumeration defining initialization for fluid flow";

  type ReferenceEnthalpy = enumeration(
    ZeroAt0K 
      "The enthalpy is 0 at 0 K (default), if the enthalpy of formation is excluded",

    ZeroAt25C 
      "The enthalpy is 0 at 25 degC, if the enthalpy of formation is excluded",

    UserDefined 
      "The user-defined reference enthalpy is used at 293.15 K (25 degC)") 
  "Enumeration defining the reference enthalpy of a medium";

  type ReferenceEntropy = enumeration(
    ZeroAt0K "The entropy is 0 at 0 K (default)",
    ZeroAt0C "The entropy is 0 at 0 degC",
    UserDefined 
      "The user-defined reference entropy is used at 293.15 K (25 degC)") 
  "Enumeration defining the reference entropy of a medium";

  type pd = enumeration(
    default "Default (no boundary condition for p or d)",
    p_known "p_known (pressure p is known)",
    d_known "d_known (density d is known)") 
  "Enumeration defining whether p or d are known for the boundary condition";

  type Th = enumeration(
    default "Default (no boundary condition for T or h)",
    T_known "T_known (temperature T is known)",
    h_known "h_known (specific enthalpy h is known)") 
  "Enumeration defining whether T or h are known as boundary condition";