Modelica.Media.Interfaces.TemplateMedium

Template for media models

Information


This package is a template for new medium models. For a new medium model just make a copy of this package, remove the "partial" keyword from the package and provide the information that is requested in the comments of the Modelica source.

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

Package Content

NameDescription
cp_const=123456Constant specific heat capacity at constant pressure
Modelica.Media.Interfaces.TemplateMedium.BaseProperties BaseProperties Base properties of medium
Modelica.Media.Interfaces.TemplateMedium.ThermodynamicState ThermodynamicState a selction of variables that uniquely defines the thermodynamic state
Modelica.Media.Interfaces.TemplateMedium.dynamicViscosity dynamicViscosity Return dynamic viscosity
Modelica.Media.Interfaces.TemplateMedium.thermalConductivity thermalConductivity Return thermal conductivity
Modelica.Media.Interfaces.TemplateMedium.specificEntropy specificEntropy Return specific entropy
Modelica.Media.Interfaces.TemplateMedium.specificHeatCapacityCp specificHeatCapacityCp Return specific heat capacity at constant pressure
Modelica.Media.Interfaces.TemplateMedium.specificHeatCapacityCv specificHeatCapacityCv Return specific heat capacity at constant volume
Modelica.Media.Interfaces.TemplateMedium.isentropicExponent isentropicExponent Return isentropic exponent
Modelica.Media.Interfaces.TemplateMedium.velocityOfSound velocityOfSound Return velocity of sound
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.FluidConstants FluidConstants critical, triple, molecular and other standard data of fluid
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.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.specificGibbsEnergy specificGibbsEnergy Return specific Gibbs energy
Modelica.Media.Interfaces.PartialMedium.specificHelmholtzEnergy specificHelmholtzEnergy Return specific Helmholtz energy
Modelica.Media.Interfaces.PartialMedium.heatCapacity_cp heatCapacity_cp alias for deprecated name
Modelica.Media.Interfaces.PartialMedium.heatCapacity_cv heatCapacity_cv alias for deprecated name
Modelica.Media.Interfaces.PartialMedium.isentropicEnthalpy isentropicEnthalpy Return isentropic enthalpy
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 SpecificHeatCapacity cp_const = 123456 
  "Constant specific heat capacity at constant pressure";


Modelica.Media.Interfaces.TemplateMedium.BaseProperties Modelica.Media.Interfaces.TemplateMedium.BaseProperties

Base properties of medium

Information

Extends from (Base properties (p, d, T, h, u, R, MM and, if applicable, X and Xi) of a medium).

Parameters

TypeNameDefaultDescription
BooleanstandardOrderComponentstrueif true, and reducedX = true, the last element of X will be computed from the other ones
Advanced
BooleanpreferredMediumStatesfalse= true if StateSelect.prefer shall be used for the independent property variables of the medium

Modelica definition

redeclare model extends BaseProperties(final standardOrderComponents=true) 
  "Base properties of medium"

equation 
  d = 1;
  h = cp_const*T;
  u = h - p/d;
  MM = 0.024;
  R  = 8.3144/MM;
  state.p = p;
  state.T = T;
end BaseProperties;

Modelica.Media.Interfaces.TemplateMedium.ThermodynamicState

a selction of variables that uniquely defines the thermodynamic state

Information



Modelica definition

redeclare replaceable record ThermodynamicState 
  "a selction of variables that uniquely defines the thermodynamic state"
  AbsolutePressure p "Absolute pressure of medium";
  Temperature T "Temperature of medium";
end ThermodynamicState;

Modelica.Media.Interfaces.TemplateMedium.dynamicViscosity Modelica.Media.Interfaces.TemplateMedium.dynamicViscosity

Return dynamic viscosity

Information



Extends from (Return dynamic viscosity).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate thermodynamic state record

Outputs

TypeNameDescription
DynamicViscosityetaDynamic viscosity [Pa.s]

Modelica definition

redeclare function extends dynamicViscosity 
  "Return dynamic viscosity"
algorithm 
  eta := 10 - state.T*0.3 + state.p*0.2;
end dynamicViscosity;

Modelica.Media.Interfaces.TemplateMedium.thermalConductivity Modelica.Media.Interfaces.TemplateMedium.thermalConductivity

Return thermal conductivity

Information



Extends from (Return thermal conductivity).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate thermodynamic state record

Outputs

TypeNameDescription
ThermalConductivitylambdaThermal conductivity [W/(m.K)]

Modelica definition

redeclare function extends thermalConductivity 
  "Return thermal conductivity"
algorithm 
  lambda := 0;
end thermalConductivity;

Modelica.Media.Interfaces.TemplateMedium.specificEntropy Modelica.Media.Interfaces.TemplateMedium.specificEntropy

Return specific entropy

Information



Extends from (Return specific entropy).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate thermodynamic state record

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy [J/(kg.K)]

Modelica definition

redeclare function extends specificEntropy "Return specific entropy"
algorithm 
  s := 0;
end specificEntropy;

Modelica.Media.Interfaces.TemplateMedium.specificHeatCapacityCp Modelica.Media.Interfaces.TemplateMedium.specificHeatCapacityCp

Return specific heat capacity at constant pressure

Information



Extends from (Return specific heat capacity at constant pressure).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate thermodynamic state record

Outputs

TypeNameDescription
SpecificHeatCapacitycpSpecific heat capacity at constant pressure [J/(kg.K)]

Modelica definition

redeclare function extends specificHeatCapacityCp 
  "Return specific heat capacity at constant pressure"
algorithm 
  cp := 0;
end specificHeatCapacityCp;

Modelica.Media.Interfaces.TemplateMedium.specificHeatCapacityCv Modelica.Media.Interfaces.TemplateMedium.specificHeatCapacityCv

Return specific heat capacity at constant volume

Information



Extends from (Return specific heat capacity at constant volume).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate thermodynamic state record

Outputs

TypeNameDescription
SpecificHeatCapacitycvSpecific heat capacity at constant volume [J/(kg.K)]

Modelica definition

redeclare function extends specificHeatCapacityCv 
  "Return specific heat capacity at constant volume"
algorithm 
  cv := 0;
end specificHeatCapacityCv;

Modelica.Media.Interfaces.TemplateMedium.isentropicExponent Modelica.Media.Interfaces.TemplateMedium.isentropicExponent

Return isentropic exponent

Information



Extends from Modelica.Icons.Function (Icon for a function), (Return isentropic exponent).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate thermodynamic state record

Outputs

TypeNameDescription
IsentropicExponentgammaIsentropic exponent [1]

Modelica definition

redeclare function extends isentropicExponent 
  "Return isentropic exponent"
  extends Modelica.Icons.Function;
algorithm 
   gamma := 1;
end isentropicExponent;

Modelica.Media.Interfaces.TemplateMedium.velocityOfSound Modelica.Media.Interfaces.TemplateMedium.velocityOfSound

Return velocity of sound

Information



Extends from Modelica.Icons.Function (Icon for a function), (Return velocity of sound).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate thermodynamic state record

Outputs

TypeNameDescription
VelocityOfSoundaVelocity of sound [m/s]

Modelica definition

redeclare function extends velocityOfSound "Return velocity of sound"
  extends Modelica.Icons.Function;
algorithm 
  a := 0;
end velocityOfSound;

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