Modelica.Media.Interfaces.PartialMixtureMedium

Information

Package Content

Name	Description
ThermodynamicState	thermodynamic state variables
FluidConstants	extended fluid constants
fluidConstants	constant data for the fluid
gasConstant	Return the gas constant of the mixture (also for liquids)
moleToMassFractions	Return mass fractions X from mole fractions
massToMoleFractions	Return mole fractions from mass fractions X
Inherited
ThermoStates	Enumeration 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=101325	Reference pressure of Medium: default 1 atmosphere
reference_T=298.15	Reference temperature of Medium: default 25 deg Celsius
reference_X=fill(1/nX, nX)	Default mass fractions of medium
p_default=101325	Default 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_X	Default value for mass fractions of medium (for initialization)
nS=size(substanceNames, 1)	Number of substances
nX=nS	Number of mass fractions
nXi=if fixedX then 0 else if reducedX then nS - 1 else nS	Number of structurally independent mass fractions (see docu for details)
nC=size(extraPropertiesNames, 1)	Number of extra (outside of standard mass-balance) transported properties
BaseProperties	Base properties (p, d, T, h, u, R, MM and, if applicable, X and Xi) of a medium
setState_pTX	Return thermodynamic state as function of p, T and composition X or Xi
setState_phX	Return thermodynamic state as function of p, h and composition X or Xi
setState_psX	Return thermodynamic state as function of p, s and composition X or Xi
setState_dTX	Return thermodynamic state as function of d, T and composition X or Xi
setSmoothState	Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b
dynamicViscosity	Return dynamic viscosity
thermalConductivity	Return thermal conductivity
prandtlNumber	Return the Prandtl number
pressure	Return pressure
temperature	Return temperature
density	Return density
specificEnthalpy	Return specific enthalpy
specificInternalEnergy	Return specific internal energy
specificEntropy	Return specific entropy
specificGibbsEnergy	Return specific Gibbs energy
specificHelmholtzEnergy	Return specific Helmholtz energy
specificHeatCapacityCp	Return specific heat capacity at constant pressure
heatCapacity_cp	alias for deprecated name
specificHeatCapacityCv	Return specific heat capacity at constant volume
heatCapacity_cv	alias for deprecated name
isentropicExponent	Return isentropic exponent
isentropicEnthalpy	Return isentropic enthalpy
velocityOfSound	Return velocity of sound
isobaricExpansionCoefficient	Return overall the isobaric expansion coefficient beta
beta	alias for isobaricExpansionCoefficient for user convenience
isothermalCompressibility	Return overall the isothermal compressibility factor
kappa	alias of isothermalCompressibility for user convenience
density_derp_h	Return density derivative wrt pressure at const specific enthalpy
density_derh_p	Return density derivative wrt specific enthalpy at constant pressure
density_derp_T	Return density derivative wrt pressure at const temperature
density_derT_p	Return density derivative wrt temperature at constant pressure
density_derX	Return density derivative wrt mass fraction
molarMass	Return the molar mass of the medium
specificEnthalpy_pTX	Return specific enthalpy from p, T, and X or Xi
density_pTX	Return density from p, T, and X or Xi
temperature_phX	Return temperature from p, h, and X or Xi
density_phX	Return density from p, h, and X or Xi
temperature_psX	Return temperature from p,s, and X or Xi
density_psX	Return density from p, s, and X or Xi
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
Choices	Types, constants to define menu choices

Types and constants

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

Modelica.Media.Interfaces.PartialMixtureMedium.ThermodynamicState

Information

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

Information

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

Information

Inputs

Type	Name	Default	Description
ThermodynamicState	state		thermodynamic state

Outputs

Type	Name	Description
SpecificHeatCapacity	R	mixture 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

Information

Inputs

Type	Name	Default	Description
MoleFraction	moleFractions[:]		Mole fractions of mixture [1]
MolarMass	MMX[:]		molar masses of components [kg/mol]

Outputs

Type	Name	Description
MassFraction	X[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

Information

Inputs

Type	Name	Default	Description
MassFraction	X[:]		Mass fractions of mixture [1]
MolarMass	MMX[:]		molar masses of components [kg/mol]

Outputs

Type	Name	Description
MoleFraction	moleFractions[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;