packageHelium
Helium
Extends from Interfaces.PartialHelmholtzMedium.
Information
These are the coefficients for Helium.- Ortiz-Vega, D.O., Hall, K.R., Arp, V.D., and Lemmon, E.W.
- Interim equation (final version) for the properties of helium
to be published in J. Phys. Chem. Ref. Data, 2013
DOI: - McCarty, R.D. and Arp, V.D.
- A new wide rand equation of state for helium
Adv. Cryo. Eng. 35:1465-1475 (1990)
DOI: - Lemmon, Eric W.; Huber, M. L. and McLinden, M. O.
- NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties - REFPROP. 9.0
National Institute of Standards and Technology, Standard Reference Data Program. Gaithersburg
URL: http://www.nist.gov/srd/nist23.cfm
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 |
| Boolean | smoothModel (from PartialTwoPhaseMedium) | false | = true, if the (derived) model should not generate state events |
| Boolean | onePhase (from PartialTwoPhaseMedium) | false | = true, if the (derived) model should never be called with two-phase inputs |
| FluidConstants | fluidConstants (from PartialTwoPhaseMedium) | Constant data for the fluid | |
| HelmholtzMedia.Interfaces.Types.FluidLimits | fluidLimits (from PartialHelmholtzMedium) | ||
| EoS.HelmholtzCoefficients | helmholtzCoefficients (from PartialHelmholtzMedium) | ||
| Transport.ThermalConductivityCoefficients | thermalConductivityCoefficients (from PartialHelmholtzMedium) | ||
| Transport.DynamicViscosityCoefficients | dynamicViscosityCoefficients (from PartialHelmholtzMedium) | ||
| Transport.SurfaceTensionCoefficients | surfaceTensionCoefficients (from PartialHelmholtzMedium) | ||
| Ancillary.AncillaryCoefficients | ancillaryCoefficients (from PartialHelmholtzMedium) | ||
| InputChoice | inputChoice (from PartialHelmholtzMedium) | InputChoice.ph | Default choice of input variables for property computations |
| FluidConstants | fluidConstantsHelium | Fluid Constants | |
| FluidLimits | fluidLimitsHelium | Helmholtz EoS Limits | |
| EoS.HelmholtzCoefficients | helmholtzCoefficientsHelium | Coefficients of the Helmholtz EoS | |
| Transport.ThermalConductivityCoefficients | thermalConductivityCoefficientsHelium | Coefficients for the thermal conductivity | |
| Transport.DynamicViscosityCoefficients | dynamicViscosityCoefficientsHelium | Coefficients for the dynamic viscosity | |
| Transport.SurfaceTensionCoefficients | surfaceTensionCoefficientsHelium | Coefficients for the surface tension | |
| Ancillary.AncillaryCoefficients | ancillaryCoefficientsHelium | Coefficients for the ancillary equations (PS5, DL1, DV3, ML1) |