Medium model of Ideal gas with constant cp and cv. All other quantities, e.g., transport properties, are constant.
Extends from Interfaces.PartialPureSubstance (Base class for pure substances of one chemical substance).
| Name | Description |
|---|---|
| cp_const | Constant specific heat capacity at constant pressure |
| cv_const=cp_const - R_gas | Constant specific heat capacity at constant volume |
| R_gas | Medium specific gas constant |
| MM_const | Molar mass |
| eta_const | Constant dynamic viscosity |
| lambda_const | Constant thermal conductivity |
| T_min | Minimum temperature valid for medium model |
| T_max | Maximum temperature valid for medium model |
| T0=reference_T | Zero enthalpy temperature |
| fluidConstants | Fluid constants |
| Thermodynamic state of ideal gas | |
| Base properties of ideal gas | |
| Return thermodynamic state from p, T, and X or Xi | |
| Return thermodynamic state from p, h, and X or Xi | |
| Return thermodynamic state from p, s, and X or Xi | |
| Return thermodynamic state from d, T, and X or Xi | |
| Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b | |
| Return pressure of ideal gas | |
| Return temperature of ideal gas | |
| Return density of ideal gas | |
| Return specific enthalpy | |
| Return specific internal energy | |
| Return specific entropy | |
| Return specific Gibbs energy | |
| Return specific Helmholtz energy | |
| Return dynamic viscosity | |
| Return thermal conductivity | |
| Return specific heat capacity at constant pressure | |
| Return specific heat capacity at constant volume | |
| Return isentropic exponent | |
| Return velocity of sound | |
| Return specific enthalpy from p, T, and X or Xi | |
| Return temperature from p, h, and X or Xi | |
| Return density from p, h, and X or Xi | |
| Return isentropic enthalpy | |
| Returns overall the isobaric expansion coefficient beta | |
| Returns overall the isothermal compressibility factor | |
| Returns the partial derivative of density with respect to pressure at constant temperature | |
| Returns the partial derivative of density with respect to temperature at constant pressure | |
| Returns the partial derivative of density with respect to mass fractions at constant pressure and temperature | |
| Returns the molar mass of the medium | |
| Inherited | |
| Return thermodynamic state from p and T | |
| Return thermodynamic state from p and h | |
| Return thermodynamic state from p and s | |
| Return thermodynamic state from d and T | |
| Return density from p and h | |
| Return temperature from p and h | |
| Return pressure from d and T | |
| Return specific enthalpy from d and T | |
| Return specific enthalpy from p and s | |
| Return temperature from p and s | |
| Return density from p and s | |
| Return specific enthalpy from p and T | |
| Return density from p and T | |
| ThermoStates=Modelica.Media.Interfaces.Choices.IndependentVariables.pT | 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=false | = 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=true | = 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) |
| C_default=fill(0, nC) | Default value for trace substances 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 |
| C_nominal=1.0e-6*ones(nC) | Default for the nominal values for the extra properties |
| Critical, triple, molecular and other standard data of fluid | |
| Return the Prandtl number | |
| Alias for deprecated name | |
| Alias for deprecated name | |
| Alias for isobaricExpansionCoefficient for user convenience | |
| Alias of isothermalCompressibility for user convenience | |
| Return density derivative w.r.t. pressure at const specific enthalpy | |
| Return density derivative w.r.t. specific enthalpy at constant pressure | |
| Return specific enthalpy from p, T, and X or Xi | |
| Return density from p, T, and X or Xi | |
| Return temperature from p,s, and X or Xi | |
| Return density from p, s, and X or Xi | |
| Return specific enthalpy from p, s, and X or Xi | |
| Type for mass flow rate with medium specific attributes | |
| Type for absolute pressure with medium specific attributes | |
| Type for density with medium specific attributes | |
| Type for dynamic viscosity with medium specific attributes | |
| Type for enthalpy flow rate with medium specific attributes | |
| Type for mass fraction with medium specific attributes | |
| Type for mole fraction with medium specific attributes | |
| Type for molar mass with medium specific attributes | |
| Type for molar volume with medium specific attributes | |
| Type for isentropic exponent with medium specific attributes | |
| Type for specific energy with medium specific attributes | |
| Type for specific internal energy with medium specific attributes | |
| Type for specific enthalpy with medium specific attributes | |
| Type for specific entropy with medium specific attributes | |
| Type for specific heat capacity with medium specific attributes | |
| Type for surface tension with medium specific attributes | |
| Type for temperature with medium specific attributes | |
| Type for thermal conductivity with medium specific attributes | |
| Type for Prandtl number with medium specific attributes | |
| Type for velocity of sound with medium specific attributes | |
| Type for unspecified, mass-specific property transported by flow | |
| Type for conserved integral of unspecified, mass specific property | |
| Type for flow rate of unspecified, mass-specific property | |
| Type for isobaric expansion coefficient with medium specific attributes | |
| Type for dipole moment with medium specific attributes | |
| Type for partial derivative of density with respect to pressure with medium specific attributes | |
| Type for partial derivative of density with respect to enthalpy with medium specific attributes | |
| Type for partial derivative of enthalpy with respect to pressure with medium specific attributes | |
| Type for partial derivative of density with respect to temperature with medium specific attributes | |
| Type for partial derivative of temperature with respect to pressure with medium specific attributes | |
| Saturation properties of two phase medium | |
| Validity limits for fluid model | |
| Phase of the fluid: 1 for 1-phase, 2 for two-phase, 0 for not known, e.g., interactive use | |
| The most basic version of a record used in several degrees of detail | |
| The ideal gas version of a record used in several degrees of detail | |
| The two phase fluid version of a record used in several degrees of detail | |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.ThermodynamicStateThermodynamic state of ideal gas
Extends from (Minimal variable set that is available as input argument to every medium function).
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.BasePropertiesBase properties of ideal gas
This is the most simple incompressible medium model, where specific enthalpy h and specific internal energy u are only a function of temperature T and all other provided medium quantities are assumed to be constant.
| Name | Description |
|---|---|
| Advanced | |
| preferredMediumStates | = true if StateSelect.prefer shall be used for the independent property variables of the medium |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.setState_pTXReturn thermodynamic state from p, T, and X or Xi
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| p | Pressure [Pa] |
| T | Temperature [K] |
| X[:] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| state | Thermodynamic state record |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.setState_phXReturn thermodynamic state from p, h, and X or Xi
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| p | Pressure [Pa] |
| h | Specific enthalpy [J/kg] |
| X[:] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| state | Thermodynamic state record |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.setState_psXReturn thermodynamic state from p, s, and X or Xi
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| p | Pressure [Pa] |
| s | Specific entropy [J/(kg.K)] |
| X[:] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| state | Thermodynamic state record |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.setState_dTXReturn thermodynamic state from d, T, and X or Xi
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| d | Density [kg/m3] |
| T | Temperature [K] |
| X[:] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| state | Thermodynamic state record |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.setSmoothStateReturn thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b
Extends from (Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b).
| Name | Description |
|---|---|
| x | m_flow or dp |
| state_a | Thermodynamic state if x > 0 |
| state_b | Thermodynamic state if x < 0 |
| x_small | Smooth transition in the region -x_small < x < x_small |
| Name | Description |
|---|---|
| state | Smooth thermodynamic state for all x (continuous and differentiable) |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.pressureReturn pressure of ideal gas
Extends from (Return pressure).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| p | Pressure [Pa] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.temperatureReturn temperature of ideal gas
Extends from (Return temperature).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| T | Temperature [K] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.densityReturn density of ideal gas
Extends from (Return density).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| d | Density [kg/m3] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.specificEnthalpyReturn specific enthalpy
Extends from Modelica.Icons.Function (Icon for functions), (Return specific enthalpy).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| h | Specific enthalpy [J/kg] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.specificInternalEnergyReturn specific internal energy
Extends from Modelica.Icons.Function (Icon for functions), (Return specific internal energy).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| u | Specific internal energy [J/kg] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.specificEntropyReturn specific entropy
Extends from Modelica.Icons.Function (Icon for functions), (Return specific entropy).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| s | Specific entropy [J/(kg.K)] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.specificGibbsEnergyReturn specific Gibbs energy
Extends from Modelica.Icons.Function (Icon for functions), (Return specific Gibbs energy).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| g | Specific Gibbs energy [J/kg] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.specificHelmholtzEnergyReturn specific Helmholtz energy
Extends from Modelica.Icons.Function (Icon for functions), (Return specific Helmholtz energy).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| f | Specific Helmholtz energy [J/kg] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.dynamicViscosityReturn dynamic viscosity
Extends from (Return dynamic viscosity).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| eta | Dynamic viscosity [Pa.s] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.thermalConductivityReturn thermal conductivity
Extends from (Return thermal conductivity).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| lambda | Thermal conductivity [W/(m.K)] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.specificHeatCapacityCpReturn specific heat capacity at constant pressure
Extends from (Return specific heat capacity at constant pressure).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| cp | Specific heat capacity at constant pressure [J/(kg.K)] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.specificHeatCapacityCvReturn specific heat capacity at constant volume
Extends from (Return specific heat capacity at constant volume).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| cv | Specific heat capacity at constant volume [J/(kg.K)] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.isentropicExponentReturn isentropic exponent
Extends from (Return isentropic exponent).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| gamma | Isentropic exponent [1] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.velocityOfSoundReturn velocity of sound
Extends from (Return velocity of sound).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| a | Velocity of sound [m/s] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.specificEnthalpy_pTXReturn specific enthalpy from p, T, and X or Xi
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| p | Pressure [Pa] |
| T | Temperature [K] |
| X[nX] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| h | Specific enthalpy at p, T, X [J/kg] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.temperature_phXReturn temperature from p, h, and X or Xi
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| p | Pressure [Pa] |
| h | Specific enthalpy [J/kg] |
| X[nX] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| T | Temperature [K] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.density_phXReturn density from p, h, and X or Xi
Extends from Modelica.Icons.Function (Icon for functions).
| Name | Description |
|---|---|
| p | Pressure [Pa] |
| h | Specific enthalpy [J/kg] |
| X[nX] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| d | Density [kg/m3] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.isentropicEnthalpyReturn isentropic enthalpy
Extends from (Return isentropic enthalpy).
| Name | Description |
|---|---|
| p_downstream | Downstream pressure [Pa] |
| refState | Reference state for entropy |
| Name | Description |
|---|---|
| h_is | Isentropic enthalpy [J/kg] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.isobaricExpansionCoefficientReturns overall the isobaric expansion coefficient beta
Extends from (Return overall the isobaric expansion coefficient beta).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| beta | Isobaric expansion coefficient [1/K] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.isothermalCompressibilityReturns overall the isothermal compressibility factor
Extends from (Return overall the isothermal compressibility factor).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| kappa | Isothermal compressibility [1/Pa] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.density_derp_TReturns the partial derivative of density with respect to pressure at constant temperature
Extends from (Return density derivative w.r.t. pressure at const temperature).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| ddpT | Density derivative w.r.t. pressure [s2/m2] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.density_derT_pReturns the partial derivative of density with respect to temperature at constant pressure
Extends from (Return density derivative w.r.t. temperature at constant pressure).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| ddTp | Density derivative w.r.t. temperature [kg/(m3.K)] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.density_derXReturns the partial derivative of density with respect to mass fractions at constant pressure and temperature
Extends from (Return density derivative w.r.t. mass fraction).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| dddX[nX] | Derivative of density w.r.t. mass fraction [kg/m3] |
Modelica.Media.Interfaces.PartialSimpleIdealGasMedium.molarMassReturns the molar mass of the medium
Extends from (Return the molar mass of the medium).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| MM | Mixture molar mass [kg/mol] |