packageNaturalGasMixture_GeneralType
Simple natural gas mixture for CHP-engine combustion
Extends from AixLib.DataBase.CHP.ModularCHPEngineMedia.CHPCombustionMixtureGasNasa (Medium model of a mixture of ideal gases based on NASA source).
Information
Gasoline model for natural gas type H.
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 |
| FluidConstants | fluidConstants (from PartialMixtureMedium) | Constant data for the fluid | |
| Modelica.Media.IdealGases.Common.DataRecord | data (from CHPCombustionMixtureGasNasa) | Data records of ideal gas substances | |
| Boolean | excludeEnthalpyOfFormation (from CHPCombustionMixtureGasNasa) | true | If true, enthalpy of formation Hf is not included in specific enthalpy h |
| ReferenceEnthalpy | referenceChoice (from CHPCombustionMixtureGasNasa) | ReferenceEnthalpy.ZeroAt0K | Choice of reference enthalpy |
| SpecificEnthalpy | h_offset (from CHPCombustionMixtureGasNasa) | 0.0 | User defined offset for reference enthalpy, if referenceChoice = UserDefined |
| MolarMass | MMX (from CHPCombustionMixtureGasNasa) | data[:].MM | Molar masses of components |
| Integer | methodForThermalConductivity (from CHPCombustionMixtureGasNasa) | 1 | |
| Boolean | isGas | Fuel.isGasoline | True = Gasoline fuel, False = Liquid fuel |
| MoleFraction[:] | moleFractions_Gas | Fuel.Xi_mole | |
| MolarMass | MM | sum(Fuel.Xi_mole[i]*Fuel.MMi[i] for i in 1:size(Fuel.MMi, 1)) | Molar mass of natural gas type from its composition |
| MassFraction[:] | massFractions_Gas | Modelica.Media.Interfaces.PartialMixtureMedium.moleToMassFractions(Fuel.Xi_mole, Fuel.MMi) | |
| SpecificEnergy | H_U | sum(massFractions_Gas[i]*Fuel.H_Ui[i] for i in 1:size(Fuel.MMi, 1)) | Calorific Value of the fuel gas |
| Real | l_min | sum(Fuel.Xi_mole[i]*Fuel.nue_min[i] for i in 1:size(Fuel.MMi, 1))/0.21 | |
| Real | L_st | l_min*0.02885/MM | Stoichiometric air consumption |
| Natural gas type | |||
| AixLib.DataBase.CHP.ModularCHPEngineMedia.CombustionEngineFuelDataBaseRecord | Fuel | NaturalGas_GeneralDefinition() | Needed natural gas data for calculations, manual redefinition of volumetric proportions of the gas components (Xi_mole) required (default:{1/9,1/9,...})! |
Contents
| Name | Description |
|---|---|
 NaturalGas_GeneralDefinition |