WOLFRAM SYSTEM MODELER
Medium |
 |
Package Constants (51)
| ThermoStates |
Value: if enthalpyOfT then Modelica.Media.Interfaces.Choices.IndependentVariables.T else Modelica.Media.Interfaces.Choices.IndependentVariables.pT Type: IndependentVariables Description: Enumeration type for independent variables |
|---|---|
| mediumName |
Value: "Glycol-Water 47%" Type: String Description: Name of the medium |
| substanceNames |
Value: {mediumName} Type: String[:] Description: Names of the mixture substances. Set substanceNames={mediumName} if only one substance. |
| extraPropertiesNames |
Value: fill("", 0) Type: String[:] Description: Names of the additional (extra) transported properties. Set extraPropertiesNames=fill("",0) if unused |
| singleState |
Value: true Type: Boolean Description: = true, if u and d are not a function of pressure |
| reducedX |
Value: true Type: Boolean Description: = true if medium contains the equation sum(X) = 1.0; set reducedX=true if only one substance (see docu for details) |
| fixedX |
Value: true Type: Boolean Description: = true if medium contains the equation X = reference_X |
| reference_p |
Value: 1.013e5 Type: AbsolutePressure (Pa) Description: Reference pressure of Medium: default 1 atmosphere |
| reference_T |
Value: 298.15 Type: Temperature (K) Description: Reference temperature of Medium: default 25 deg Celsius |
| reference_X |
Value: fill(1 / nX, nX) Type: MassFraction[nX] (kg/kg) Description: Default mass fractions of medium |
| p_default |
Value: 101325 Type: AbsolutePressure (Pa) Description: Default value for pressure of medium (for initialization) |
| T_default |
Value: Modelica.Units.Conversions.from_degC(20) Type: Temperature (K) Description: Default value for temperature of medium (for initialization) |
| h_default |
Value: specificEnthalpy_pTX(p_default, T_default, X_default) Type: SpecificEnthalpy (J/kg) Description: Default value for specific enthalpy of medium (for initialization) |
| X_default |
Value: reference_X Type: MassFraction[nX] (kg/kg) Description: Default value for mass fractions of medium (for initialization) |
| C_default |
Value: fill(0, nC) Type: ExtraProperty[nC] Description: Default value for trace substances of medium (for initialization) |
| nS |
Value: size(substanceNames, 1) Type: Integer Description: Number of substances |
| nX |
Value: nS Type: Integer Description: Number of mass fractions |
| nXi |
Value: if fixedX then 0 else if reducedX then nS - 1 else nS Type: Integer Description: Number of structurally independent mass fractions (see docu for details) |
| nC |
Value: size(extraPropertiesNames, 1) Type: Integer Description: Number of extra (outside of standard mass-balance) transported properties |
| C_nominal |
Value: 1.0e-6 * ones(nC) Type: Real[nC] Description: Default for the nominal values for the extra properties |
| enthalpyOfT |
Value: true Type: Boolean Description: True if enthalpy is approximated as a function of T only, (p-dependence neglected) |
| densityOfT |
Value: size(tableDensity, 1) > 1 Type: Boolean Description: True if density is a function of temperature |
| T_min |
Value: Cv.from_degC(-30) Type: Temperature (K) Description: Minimum temperature valid for medium model |
| T_max |
Value: Cv.from_degC(100) Type: Temperature (K) Description: Maximum temperature valid for medium model |
| T0 |
Value: 273.15 Type: Temperature (K) Description: Reference Temperature |
| h0 |
Value: 0 Type: SpecificEnthalpy (J/kg) Description: Reference enthalpy at T0, reference_p |
| s0 |
Value: 0 Type: SpecificEntropy (J/(kg⋅K)) Description: Reference entropy at T0, reference_p |
| MM_const |
Value: 0.1 Type: MolarMass (kg/mol) Description: Molar mass |
| npol |
Value: 2 Type: Integer Description: Degree of polynomial used for fitting |
| npolDensity |
Value: npol Type: Integer Description: Degree of polynomial used for fitting rho(T) |
| npolHeatCapacity |
Value: npol Type: Integer Description: Degree of polynomial used for fitting Cp(T) |
| npolViscosity |
Value: npol Type: Integer Description: Degree of polynomial used for fitting eta(T) |
| npolVaporPressure |
Value: npol Type: Integer Description: Degree of polynomial used for fitting pVap(T) |
| npolConductivity |
Value: npol Type: Integer Description: Degree of polynomial used for fitting lambda(T) |
| neta |
Value: size(tableViscosity, 1) Type: Integer Description: Number of data points for viscosity |
| tableDensity |
Value: [-30, 1066; -20, 1062; -10, 1058; 0, 1054; 20, 1044; 40, 1030; 60, 1015; 80, 999; 100, 984] Type: Real[:,2] Description: Table for rho(T) |
| tableHeatCapacity |
Value: [-30, 3450; -20, 3490; -10, 3520; 0, 3560; 20, 3620; 40, 3690; 60, 3760; 80, 3820; 100, 3890] Type: Real[:,2] Description: Table for Cp(T) |
| tableViscosity |
Value: [-30, 0.160; -20, 0.0743; -10, 0.0317; 0, 0.0190; 20, 0.00626; 40, 0.00299; 60, 0.00162; 80, 0.00110; 100, 0.00081] Type: Real[:,2] Description: Table for eta(T) |
| tableVaporPressure |
Value: [0, 500; 20, 1.9e3; 40, 5.3e3; 60, 16e3; 80, 37e3; 100, 80e3] Type: Real[:,2] Description: Table for pVap(T) |
| tableConductivity |
Value: [-30, 0.397; -20, 0.396; -10, 0.395; 0, 0.395; 20, 0.394; 40, 0.393; 60, 0.392; 80, 0.391; 100, 0.390] Type: Real[:,2] Description: Table for lambda(T) |
| TinK |
Value: false Type: Boolean Description: True if T[K],Kelvin used for table temperatures |
| hasDensity |
Value: not size(tableDensity, 1) == 0 Type: Boolean Description: True if table tableDensity is present |
| hasHeatCapacity |
Value: not size(tableHeatCapacity, 1) == 0 Type: Boolean Description: True if table tableHeatCapacity is present |
| hasViscosity |
Value: not size(tableViscosity, 1) == 0 Type: Boolean Description: True if table tableViscosity is present |
| hasVaporPressure |
Value: not size(tableVaporPressure, 1) == 0 Type: Boolean Description: True if table tableVaporPressure is present |
| invTK |
Value: if size(tableViscosity, 1) > 0 then if TinK then 1 ./ tableViscosity[:, 1] else 1 ./ Cv.from_degC(tableViscosity[:, 1]) else fill(0, neta) Type: Real[neta] |
| poly_rho |
Value: if hasDensity then Polynomials.fitting(tableDensity[:, 1], tableDensity[:, 2], npolDensity) else zeros(npolDensity + 1) Type: Real[:] |
| poly_Cp |
Value: if hasHeatCapacity then Polynomials.fitting(tableHeatCapacity[:, 1], tableHeatCapacity[:, 2], npolHeatCapacity) else zeros(npolHeatCapacity + 1) Type: Real[:] |
| poly_eta |
Value: if hasViscosity then Polynomials.fitting(invTK, Math.log(tableViscosity[:, 2]), npolViscosity) else zeros(npolViscosity + 1) Type: Real[:] |
| poly_pVap |
Value: if hasVaporPressure then Polynomials.fitting(tableVaporPressure[:, 1], tableVaporPressure[:, 2], npolVaporPressure) else zeros(npolVaporPressure + 1) Type: Real[:] |
| poly_lam |
Value: if size(tableConductivity, 1) > 0 then Polynomials.fitting(tableConductivity[:, 1], tableConductivity[:, 2], npolConductivity) else zeros(npolConductivity + 1) Type: Real[:] |
Wolfram Language
In[1]:=
SystemModel["Modelica.Fluid.Examples.IncompressibleFluidNetwork.Medium"]
Out[1]:=
