Modelica.Media.Interfaces.PartialMixtureMedium

Base class for pure substances of several chemical substances

Information

Extends from PartialMedium (Partial medium properties (base package of all media packages)).

Package Content

NameDescription
Modelica.Media.Interfaces.PartialMixtureMedium.ThermodynamicState ThermodynamicState thermodynamic state variables
Modelica.Media.Interfaces.PartialMixtureMedium.FluidConstants FluidConstants extended fluid constants
fluidConstantsconstant data for the fluid
Modelica.Media.Interfaces.PartialMixtureMedium.gasConstant gasConstant Return the gas constant of the mixture (also for liquids)
Modelica.Media.Interfaces.PartialMixtureMedium.moleToMassFractions moleToMassFractions Return mass fractions X from mole fractions
Modelica.Media.Interfaces.PartialMixtureMedium.massToMoleFractions massToMoleFractions Return mole fractions from mass fractions X
Inherited
ThermoStatesEnumeration type for independent variables
mediumName="unusablePartialMedium"Name of the medium
substanceNames={mediumName}Names of the mixture substances. Set substanceNames={mediumName} if only one substance.
extraPropertiesNames=fill("", 0)Names of the additional (extra) transported properties. Set extraPropertiesNames=fill("",0) if unused
singleState= true, if u and d are not a function of pressure
reducedX=true= true if medium contains the equation sum(X) = 1.0; set reducedX=true if only one substance (see docu for details)
fixedX=false= true if medium contains the equation X = reference_X
reference_p=101325Reference pressure of Medium: default 1 atmosphere
reference_T=298.15Reference temperature of Medium: default 25 deg Celsius
reference_X=fill(1/nX, nX)Default mass fractions of medium
p_default=101325Default value for pressure of medium (for initialization)
T_default=Modelica.SIunits.Conversions.from_degC(20)Default value for temperature of medium (for initialization)
h_default=specificEnthalpy_pTX(p_default, T_default, X_default)Default value for specific enthalpy of medium (for initialization)
X_default=reference_XDefault value for mass fractions of medium (for initialization)
nS=size(substanceNames, 1)Number of substances
nX=nSNumber of mass fractions
nXi=if fixedX then 0 else if reducedX then nS - 1 else nSNumber of structurally independent mass fractions (see docu for details)
nC=size(extraPropertiesNames, 1)Number of extra (outside of standard mass-balance) transported properties
Modelica.Media.Interfaces.PartialMedium.BaseProperties BaseProperties Base properties (p, d, T, h, u, R, MM and, if applicable, X and Xi) of a medium
Modelica.Media.Interfaces.PartialMedium.setState_pTX setState_pTX Return thermodynamic state as function of p, T and composition X or Xi
Modelica.Media.Interfaces.PartialMedium.setState_phX setState_phX Return thermodynamic state as function of p, h and composition X or Xi
Modelica.Media.Interfaces.PartialMedium.setState_psX setState_psX Return thermodynamic state as function of p, s and composition X or Xi
Modelica.Media.Interfaces.PartialMedium.setState_dTX setState_dTX Return thermodynamic state as function of d, T and composition X or Xi
Modelica.Media.Interfaces.PartialMedium.setSmoothState setSmoothState Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b
Modelica.Media.Interfaces.PartialMedium.dynamicViscosity dynamicViscosity Return dynamic viscosity
Modelica.Media.Interfaces.PartialMedium.thermalConductivity thermalConductivity Return thermal conductivity
Modelica.Media.Interfaces.PartialMedium.prandtlNumber prandtlNumber Return the Prandtl number
Modelica.Media.Interfaces.PartialMedium.pressure pressure Return pressure
Modelica.Media.Interfaces.PartialMedium.temperature temperature Return temperature
Modelica.Media.Interfaces.PartialMedium.density density Return density
Modelica.Media.Interfaces.PartialMedium.specificEnthalpy specificEnthalpy Return specific enthalpy
Modelica.Media.Interfaces.PartialMedium.specificInternalEnergy specificInternalEnergy Return specific internal energy
Modelica.Media.Interfaces.PartialMedium.specificEntropy specificEntropy Return specific entropy
Modelica.Media.Interfaces.PartialMedium.specificGibbsEnergy specificGibbsEnergy Return specific Gibbs energy
Modelica.Media.Interfaces.PartialMedium.specificHelmholtzEnergy specificHelmholtzEnergy Return specific Helmholtz energy
Modelica.Media.Interfaces.PartialMedium.specificHeatCapacityCp specificHeatCapacityCp Return specific heat capacity at constant pressure
Modelica.Media.Interfaces.PartialMedium.heatCapacity_cp heatCapacity_cp alias for deprecated name
Modelica.Media.Interfaces.PartialMedium.specificHeatCapacityCv specificHeatCapacityCv Return specific heat capacity at constant volume
Modelica.Media.Interfaces.PartialMedium.heatCapacity_cv heatCapacity_cv alias for deprecated name
Modelica.Media.Interfaces.PartialMedium.isentropicExponent isentropicExponent Return isentropic exponent
Modelica.Media.Interfaces.PartialMedium.isentropicEnthalpy isentropicEnthalpy Return isentropic enthalpy
Modelica.Media.Interfaces.PartialMedium.velocityOfSound velocityOfSound Return velocity of sound
Modelica.Media.Interfaces.PartialMedium.isobaricExpansionCoefficient isobaricExpansionCoefficient Return overall the isobaric expansion coefficient beta
Modelica.Media.Interfaces.PartialMedium.beta beta alias for isobaricExpansionCoefficient for user convenience
Modelica.Media.Interfaces.PartialMedium.isothermalCompressibility isothermalCompressibility Return overall the isothermal compressibility factor
Modelica.Media.Interfaces.PartialMedium.kappa kappa alias of isothermalCompressibility for user convenience
Modelica.Media.Interfaces.PartialMedium.density_derp_h density_derp_h Return density derivative wrt pressure at const specific enthalpy
Modelica.Media.Interfaces.PartialMedium.density_derh_p density_derh_p Return density derivative wrt specific enthalpy at constant pressure
Modelica.Media.Interfaces.PartialMedium.density_derp_T density_derp_T Return density derivative wrt pressure at const temperature
Modelica.Media.Interfaces.PartialMedium.density_derT_p density_derT_p Return density derivative wrt temperature at constant pressure
Modelica.Media.Interfaces.PartialMedium.density_derX density_derX Return density derivative wrt mass fraction
Modelica.Media.Interfaces.PartialMedium.molarMass molarMass Return the molar mass of the medium
Modelica.Media.Interfaces.PartialMedium.specificEnthalpy_pTX specificEnthalpy_pTX Return specific enthalpy from p, T, and X or Xi
Modelica.Media.Interfaces.PartialMedium.density_pTX density_pTX Return density from p, T, and X or Xi
Modelica.Media.Interfaces.PartialMedium.temperature_phX temperature_phX Return temperature from p, h, and X or Xi
Modelica.Media.Interfaces.PartialMedium.density_phX density_phX Return density from p, h, and X or Xi
Modelica.Media.Interfaces.PartialMedium.temperature_psX temperature_psX Return temperature from p,s, and X or Xi
Modelica.Media.Interfaces.PartialMedium.density_psX density_psX Return density from p, s, and X or Xi
Modelica.Media.Interfaces.PartialMedium.specificEnthalpy_psX specificEnthalpy_psX Return specific enthalpy from p, s, and X or Xi
AbsolutePressure Type for absolute pressure with medium specific attributes
Density Type for density with medium specific attributes
DynamicViscosity Type for dynamic viscosity with medium specific attributes
EnthalpyFlowRate Type for enthalpy flow rate with medium specific attributes
MassFlowRate Type for mass flow rate with medium specific attributes
MassFraction Type for mass fraction with medium specific attributes
MoleFraction Type for mole fraction with medium specific attributes
MolarMass Type for molar mass with medium specific attributes
MolarVolume Type for molar volume with medium specific attributes
IsentropicExponent Type for isentropic exponent with medium specific attributes
SpecificEnergy Type for specific energy with medium specific attributes
SpecificInternalEnergy Type for specific internal energy with medium specific attributes
SpecificEnthalpy Type for specific enthalpy with medium specific attributes
SpecificEntropy Type for specific entropy with medium specific attributes
SpecificHeatCapacity Type for specific heat capacity with medium specific attributes
SurfaceTension Type for surface tension with medium specific attributes
Temperature Type for temperature with medium specific attributes
ThermalConductivity Type for thermal conductivity with medium specific attributes
PrandtlNumber Type for Prandtl number with medium specific attributes
VelocityOfSound Type for velocity of sound with medium specific attributes
ExtraProperty Type for unspecified, mass-specific property transported by flow
CumulativeExtraProperty Type for conserved integral of unspecified, mass specific property
ExtraPropertyFlowRate Type for flow rate of unspecified, mass-specific property
IsobaricExpansionCoefficient Type for isobaric expansion coefficient with medium specific attributes
DipoleMoment Type for dipole moment with medium specific attributes
DerDensityByPressure Type for partial derivative of density with resect to pressure with medium specific attributes
DerDensityByEnthalpy Type for partial derivative of density with resect to enthalpy with medium specific attributes
DerEnthalpyByPressure Type for partial derivative of enthalpy with resect to pressure with medium specific attributes
DerDensityByTemperature Type for partial derivative of density with resect to temperature with medium specific attributes
Modelica.Media.Interfaces.PartialMedium.Choices Choices Types, constants to define menu choices

Types and constants

  constant FluidConstants[nS] fluidConstants "constant data for the fluid";


Modelica.Media.Interfaces.PartialMixtureMedium.ThermodynamicState Modelica.Media.Interfaces.PartialMixtureMedium.ThermodynamicState

thermodynamic state variables

Information

Extends from (Minimal variable set that is available as input argument to every medium function).

Modelica definition

redeclare replaceable record extends ThermodynamicState 
  "thermodynamic state variables"
  AbsolutePressure p "Absolute pressure of medium";
  Temperature T "Temperature of medium";
  MassFraction X[nX] "Mass fractions (= (component mass)/total mass  m_i/m)";
end ThermodynamicState;

Modelica.Media.Interfaces.PartialMixtureMedium.FluidConstants Modelica.Media.Interfaces.PartialMixtureMedium.FluidConstants

extended fluid constants

Information

Extends from (critical, triple, molecular and other standard data of fluid).

Modelica definition

redeclare replaceable record extends FluidConstants 
  "extended fluid constants"
  Temperature criticalTemperature "critical temperature";
  AbsolutePressure criticalPressure "critical pressure";
  MolarVolume criticalMolarVolume "critical molar Volume";
  Real acentricFactor "Pitzer acentric factor";
  Temperature triplePointTemperature "triple point temperature";
  AbsolutePressure triplePointPressure "triple point pressure";
  Temperature meltingPoint "melting point at 101325 Pa";
  Temperature normalBoilingPoint "normal boiling point (at 101325 Pa)";
  DipoleMoment dipoleMoment 
    "dipole moment of molecule in Debye (1 debye = 3.33564e10-30 C.m)";
  Boolean hasIdealGasHeatCapacity=false 
    "true if ideal gas heat capacity is available";
  Boolean hasCriticalData=false "true if critical data are known";
  Boolean hasDipoleMoment=false "true if a dipole moment known";
  Boolean hasFundamentalEquation=false "true if a fundamental equation";
  Boolean hasLiquidHeatCapacity=false 
    "true if liquid heat capacity is available";
  Boolean hasSolidHeatCapacity=false "true if solid heat capacity is available";
  Boolean hasAccurateViscosityData=false 
    "true if accurate data for a viscosity function is available";
  Boolean hasAccurateConductivityData=false 
    "true if accurate data for thermal conductivity is available";
  Boolean hasVapourPressureCurve=false 
    "true if vapour pressure data, e.g. Antoine coefficents are known";
  Boolean hasAcentricFactor=false "true if Pitzer accentric factor is known";
  SpecificEnthalpy HCRIT0=0.0 
    "Critical specific enthalpy of the fundamental equation";
  SpecificEntropy SCRIT0=0.0 
    "Critical specific entropy of the fundamental equation";
  SpecificEnthalpy deltah=0.0 
    "Difference between specific enthalpy model (h_m) and f.eq. (h_f) (h_m - h_f)";
  SpecificEntropy deltas=0.0 
    "Difference between specific enthalpy model (s_m) and f.eq. (s_f) (s_m - s_f)";
end FluidConstants;

Modelica.Media.Interfaces.PartialMixtureMedium.gasConstant Modelica.Media.Interfaces.PartialMixtureMedium.gasConstant

Return the gas constant of the mixture (also for liquids)

Information

Extends from Modelica.Icons.Function (Icon for a function).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate thermodynamic state

Outputs

TypeNameDescription
SpecificHeatCapacityRmixture gas constant [J/(kg.K)]

Modelica definition

replaceable function gasConstant 
  "Return the gas constant of the mixture (also for liquids)"
    extends Modelica.Icons.Function;
    input ThermodynamicState state "thermodynamic state";
    output SI.SpecificHeatCapacity R "mixture gas constant";
end gasConstant;

Modelica.Media.Interfaces.PartialMixtureMedium.moleToMassFractions Modelica.Media.Interfaces.PartialMixtureMedium.moleToMassFractions

Return mass fractions X from mole fractions

Information

Extends from Modelica.Icons.Function (Icon for a function).

Inputs

TypeNameDefaultDescription
MoleFractionmoleFractions[:] Mole fractions of mixture [1]
MolarMassMMX[:] molar masses of components [kg/mol]

Outputs

TypeNameDescription
MassFractionX[size(moleFractions, 1)]Mass fractions of gas mixture [1]

Modelica definition

function moleToMassFractions 
  "Return mass fractions X from mole fractions"
  extends Modelica.Icons.Function;
  input SI.MoleFraction moleFractions[:] "Mole fractions of mixture";
  input MolarMass[:] MMX "molar masses of components";
  output SI.MassFraction X[size(moleFractions, 1)] 
    "Mass fractions of gas mixture";
protected 
  MolarMass Mmix =  moleFractions*MMX "molar mass of mixture";
algorithm 
  for i in 1:size(moleFractions, 1) loop
    X[i] := moleFractions[i]*MMX[i] /Mmix;
  end for;
end moleToMassFractions;

Modelica.Media.Interfaces.PartialMixtureMedium.massToMoleFractions Modelica.Media.Interfaces.PartialMixtureMedium.massToMoleFractions

Return mole fractions from mass fractions X

Information

Extends from Modelica.Icons.Function (Icon for a function).

Inputs

TypeNameDefaultDescription
MassFractionX[:] Mass fractions of mixture [1]
MolarMassMMX[:] molar masses of components [kg/mol]

Outputs

TypeNameDescription
MoleFractionmoleFractions[size(X, 1)]Mole fractions of gas mixture [1]

Modelica definition

function massToMoleFractions 
  "Return mole fractions from mass fractions X"
  extends Modelica.Icons.Function;
  input SI.MassFraction X[:] "Mass fractions of mixture";
  input SI.MolarMass[:] MMX "molar masses of components";
  output SI.MoleFraction moleFractions[size(X, 1)] 
    "Mole fractions of gas mixture";
protected 
  Real invMMX[size(X, 1)] "inverses of molar weights";
  SI.MolarMass Mmix "molar mass of mixture";
algorithm 
  for i in 1:size(X, 1) loop
    invMMX[i] := 1/MMX[i];
  end for;
  Mmix := 1/(X*invMMX);
  for i in 1:size(X, 1) loop
    moleFractions[i] := Mmix*X[i]/MMX[i];
  end for;
end massToMoleFractions;

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