packagePartialSimpleIdealGasMedium
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).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Media.Interfaces.Choices.IndependentVariables | ThermoStates (from PartialMedium) | Enumeration type for independent variables | |
| String | mediumName (from PartialMedium) | "unusablePartialMedium" | Name of the medium |
| String[:] | substanceNames (from PartialMedium) | {mediumName} | Names of the mixture substances. Set substanceNames={mediumName} if only one substance. |
| String[:] | extraPropertiesNames (from PartialMedium) | fill("", 0) | Names of the additional (extra) transported properties. Set extraPropertiesNames=fill("",0) if unused |
| Boolean | singleState (from PartialMedium) | = true, if u and d are not a function of pressure | |
| Boolean | reducedX (from PartialMedium) | true | = true, if medium contains the equation sum(X) = 1.0; set reducedX=true, if only one substance (see docu for details) |
| Boolean | fixedX (from PartialMedium) | false | = true, if medium contains the equation X = reference_X |
| AbsolutePressure | reference_p (from PartialMedium) | 101325 | Reference pressure of Medium: default 1 atmosphere |
| Temperature | reference_T (from PartialMedium) | 298.15 | Reference temperature of Medium: default 25 deg Celsius |
| MassFraction[nX] | reference_X (from PartialMedium) | fill(1/nX, nX) | Default mass fractions of medium |
| AbsolutePressure | p_default (from PartialMedium) | 101325 | Default value for pressure of medium (for initialization) |
| Temperature | T_default (from PartialMedium) | Modelica.Units.Conversions.from_degC(20) | Default value for temperature of medium (for initialization) |
| SpecificEnthalpy | h_default (from PartialMedium) | specificEnthalpy_pTX(p_default, T_default, X_default) | Default value for specific enthalpy of medium (for initialization) |
| MassFraction[nX] | X_default (from PartialMedium) | reference_X | Default value for mass fractions of medium (for initialization) |
| ExtraProperty[nC] | C_default (from PartialMedium) | fill(0, nC) | Default value for trace substances of medium (for initialization) |
| Integer | nS (from PartialMedium) | size(substanceNames, 1) | Number of substances |
| Integer | nX (from PartialMedium) | nS | Number of mass fractions |
| Integer | nXi (from PartialMedium) | if fixedX then 0 else if reducedX then nS - 1 else nS | Number of structurally independent mass fractions (see docu for details) |
| Integer | nC (from PartialMedium) | size(extraPropertiesNames, 1) | Number of extra (outside of standard mass-balance) transported properties |
| Real[nC] | C_nominal (from PartialMedium) | 1.0e-6*ones(nC) | Default for the nominal values for the extra properties |
| SpecificHeatCapacity | cp_const | Constant specific heat capacity at constant pressure | |
| SpecificHeatCapacity | cv_const | cp_const - R_gas | Constant specific heat capacity at constant volume |
| SpecificHeatCapacity | R_gas | Medium specific gas constant | |
| MolarMass | MM_const | Molar mass | |
| DynamicViscosity | eta_const | Constant dynamic viscosity | |
| ThermalConductivity | lambda_const | Constant thermal conductivity | |
| Temperature | T_min | Minimum temperature valid for medium model | |
| Temperature | T_max | Maximum temperature valid for medium model | |
| Temperature | T0 | reference_T | Zero enthalpy temperature |
| FluidConstants | fluidConstants | Fluid constants |
Contents
| Name | Description |
|---|---|
 ThermodynamicState | Thermodynamic state of ideal gas |
 BaseProperties | Base properties of ideal gas |
 setState_pTX | Return thermodynamic state from p, T, and X or Xi |
 setState_phX | Return thermodynamic state from p, h, and X or Xi |
 setState_psX | Return thermodynamic state from p, s, and X or Xi |
 setState_dTX | Return thermodynamic state from d, T, and X or Xi |
 setSmoothState | Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b |
 pressure | Return pressure of ideal gas |
 temperature | Return temperature of ideal gas |
 density | Return density of ideal gas |
 specificEnthalpy | Return specific enthalpy |
 specificInternalEnergy | Return specific internal energy |
 specificEntropy | Return specific entropy |
 specificGibbsEnergy | Return specific Gibbs energy |
 specificHelmholtzEnergy | Return specific Helmholtz energy |
 dynamicViscosity | Return dynamic viscosity |
 thermalConductivity | Return thermal conductivity |
 specificHeatCapacityCp | Return specific heat capacity at constant pressure |
 specificHeatCapacityCv | Return specific heat capacity at constant volume |
 isentropicExponent | Return isentropic exponent |
 velocityOfSound | Return velocity of sound |
 specificEnthalpy_pTX | Return specific enthalpy 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 |
 isentropicEnthalpy | Return isentropic enthalpy |
 isobaricExpansionCoefficient | Returns overall the isobaric expansion coefficient beta |
 isothermalCompressibility | Returns overall the isothermal compressibility factor |
 density_derp_T | Returns the partial derivative of density with respect to pressure at constant temperature |
 density_derT_p | Returns the partial derivative of density with respect to temperature at constant pressure |
 density_derX | Returns the partial derivative of density with respect to mass fractions at constant pressure and temperature |
 molarMass | Returns the molar mass of the medium |