ReferenceMoistAir: Detailed moist air model (143.15 ... 2000 K)
Information
Calculation of fluid properties for moist air in the region from 143.15 Kelvin to 2000 Kelvin at pressures up to 10 MPa. This model of moist air is based on
the diploma thesis of Hellriegel [10] with small modifications. Moist air is treated as an ideal mixture of the real fluids air and water.
Restriction
The functions provided by this package shall be used inside of the restricted limits according to the referenced literature.
-
611.2 Pa ≤ p ≤ 10 MPa
-
143.15 K ≤ T ≤ 2000 K
Usage
The package MoistAir can be used as any other medium model (see User's Guide of Media Library for further information). The package defines two boolean constants useEnhancementFactor and useDissociation, which give the user fine grained control of the calculations.
| Constant |
Default Value |
Meaning |
| useEnhancementFactor |
false |
The enhancement factor is used in the calculation of the saturation partial pressure of water in moist air. It is always very close to 1 except for high pressures (>2 MPa) and low temperatures (<233.15 K). For pressures less than 1 MPa this factor can be safely set to 1. Its calculation is very expensive, since it can only be calculated by an iterative method. |
| useDissociation |
true |
The effect of dissociation is taken into account for temperatures greater than 773.15 K. |
Calculation algorithms
Nomenclature
| p |
Mixture pressure in Pa |
| T |
Temperature in K |
| xw |
Absolute humidity in kg(water)/kg(dry air) |
| xws |
Absolute humidity on saturation boundary in kg(water)/kg(dry air) |
| φ |
Relative humidity (only defined for unsaturated humid air) |
Unsaturated and saturated humid air (0 ≤ xw ≤ xws)
Ideal mixture of dry air and steam
- Dry air:
- d,h,u,s,cp from [1]
- λ, η from [2]
- Steam:
- d,h,u,s,cp from [4]
- λ, η for 273.15 K ≤ T ≤ 1073.15 K from [5] and [6]
- λ, η for T < 273.15 K or T > 1073.15 K from [12]
Supersaturated humid air (liquid fog and ice fog)
Liquid fog (xw > xwsw) and T ≥ 273.16 K
Ideal mixture of saturated humid air and water
- Saturated humid air (see above)
- d,h,u,s of liquid droplets from [4]
- cp is not defined
- λ, η of liquid droplets from [5] and [6]
Ice fog (xw > xwsw) and T < 273.16 K
Ideal mixture of saturated humid air and ice
- Saturated humid air (see above)
- d,h,u,s of ice crystals from [7]
- cp is not defined
- λ of ice as constant value
- η of ice is neglected
Saturation pressure of water in moist air
The saturation pressure pds of water in moist air is calculated by pds = f*psat, where
- f is the enhancement factor from [9] and [3]
- psat for T ≥ 273.16 K is the saturation pressure from [4]
- psat for T < 273.16 K is the saturation pressure from [8]
Dissociation
For temperatures above 773.15 K effects of dissociation are taken into account. Dissociation is modeled according to [11].
For high temperatures the calculated values for moist air with 0 kg(water)/kg(dry air) (i.e. dry air) may differ from those
calculated by the package Modelica.Media.Air.ReferenceAir, because there no dissociation is considered.
References
- [1] Thermodynamic Properties of Air and Mixtures of Nitrogen, Argon,
and Oxygen From 60 to 2000 K at Pressures to 2000 MPa. J. Phys. Chem. Ref. Data, Vol. 29, No. 3, 2000.
- [2] Viscosity and Thermal Conductivity Equations for
Nitrogen, Oxygen, Argon, and Air. International Journal of Thermophysics, Vol. 25, No. 1, January 2004
- [3] Revised Release on the IAPWS Formulation 1995 for the Thermodynamic
Properties of Ordinary Water Substance for General and Scientific Use. 2009 International Association for the Properties of Water and Steam.
- [4] Revised Release on the IAPWS Industrial Formulation 1997
for the Thermodynamic Properties of Water and Steam. 2007 International Association for the Properties of Water and Steam.
- [5] Release on the IAPWS Formulation 2008 for the Viscosity of Ordinary Water Substance. 2008 International Association for the Properties of Water and Steam
- [6] Release on the IAPWS Formulation 2011 for the Thermal Conductivity of
Ordinary Water Substance. 2011 International Association for the Properties of Water and Steam.
- [7] Revised Release on the Equation of State 2006 for H2O Ice Ih. 2009 International Association for the Properties of Water and Steam.
- [8] Revised Release on the Pressure along the Melting and
Sublimation Curves of Ordinary Water Substance. 2011 International Association for the Properties of Water and Steam.
- [9] Determination of Thermodynamic and Transport Properties
of Humid Air for Power-Cycle Calculations. 2009 PTB, Braunschweig, Germany.
- [10] Berechnung der thermodynamischen Zustandsfunktionen von
feuchter Luft in energietechnischen Prozessmodellierungen. 2001 Diplomarbeit, Zittau.
- [11] Thermodynamische Stoffwerte von feuchter Luft und Verbrennungsgasen. 2003 VDI-Richtlinie 4670.
- [12] Wärmeübertragung in Dampferzeugern und Wärmetauschern. 1985 FDBR-Fachbuchreihe, Bd. 2, Vulkan Verlag Essen.
References
- Lemmon, E. W., Jacobsen, R. T., Penoncello, S. G., Friend, D. G.:
- Thermodynamic Properties of Air and Mixtures of Nitrogen, Argon,
and Oxygen From 60 to 2000 K at Pressures to 2000 MPa. J. Phys. Chem. Ref. Data, Vol. 29, No. 3, 2000.
- Lemmon, E. W., Jacobsen, R. T.:
- Viscosity and Thermal Conductivity Equations for
Nitrogen, Oxygen, Argon, and Air. International Journal of Thermophysics, Vol. 25, No. 1, January 2004
Verification
The verification report for the development of this library is provided
here.
Acknowledgment
This library was developed by XRG Simulation GmbH as part of the Clean Sky JTI project (Project title: MoMoLib-Modelica Model Library Development for Media, Magnetic Systems and Wavelets; Project number: 296369; Theme: JTI-CS-2011-1-SGO-02-026: Modelica Model Library Development Part I). The partial financial support for the development of this library by the European Union is highly appreciated.
Some parts of this library refer to the ThermoFluid library developed at Lund University (http://thermofluid.sourceforge.net).
Copyright © 2013-2020, Modelica Association and contributors
Extends from Modelica.Media.Interfaces.PartialRealCondensingGases (Base class for mixtures of real condensing and non-condensing gases).
Package Content
| Name |
Description |
| Water=1 |
Index of water (in substanceNames, massFractions X, etc.) |
| Air=2 |
Index of air (in substanceNames, massFractions X, etc.) |
| useEnhancementFactor=false |
Use the enhancement factor in the calculations |
| useDissociation=true |
Take dissociation into account for high temperatures |
| k_mair=steam.MM/dryair.MM |
Ratio of molar weights |
| dryair=ReferenceAir.Air_Utilities.Basic.Constants |
|
| steam=Utilities.Water95_Utilities.Constants |
|
| MMX={steam.MM,dryair.MM} |
Molar masses of components |
 ThermodynamicState
|
ThermodynamicState record for moist air |
 BaseProperties
|
Moist air base properties record |
 setState_pTX
|
Return thermodynamic state as function of pressure p, temperature T and composition X |
| setState_phX
|
Return thermodynamic state as function of pressure p, specific enthalpy h and composition X |
| setState_psX
|
Return thermodynamic state as function of pressure p, specific enthalpy h and composition X |
| setState_dTX
|
Return thermodynamic state as function of density d, temperature T and composition X |
| setSmoothState
|
Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b |
| Xsaturation
|
Return absolute humidity per unit mass of moist air at saturation as a function of the thermodynamic state record |
| xsaturation
|
Return absolute humidity per unit mass of dry air at saturation as a function of the thermodynamic state record |
| massFraction_pTphi
|
Return mass fractions as a function of pressure, temperature and relative humidity |
| massFractionWaterVapor
|
Return mass fraction of water vapor |
| massFractionWaterNonVapor
|
Return mass fraction of liquid and solid water |
| massFractionSaturation
|
Return saturation mass fractions |
| massFractionSaturation_ppsat
|
Return mass fvraction at saturation boundary given pressure and saturation pressure |
| massFraction_waterContent
|
Return mass fractions as a function of pressure, temperature and absolute humidity in kg(water)/kg(dry air) |
| waterContent_X
|
Return water content in kg(water)/kg(dry air) given mass fractions |
| relativeHumidity
|
Return relative humidity |
| gasConstant
|
Return ideal gas constant as a function from thermodynamic state, only valid for phi<1 |
| saturationPressureLiquid
|
Return saturation pressure of water as a function of temperature T |
| sublimationPressureIce
|
Return sublimation pressure of water as a function of temperature T between 223.16 and 273.16 K |
| saturationPressure
|
Return saturation pressure of condensing fluid |
| saturationTemperature
|
Return saturation temperature of condensing fluid |
| enthalpyOfVaporization
|
Return enthalpy of vaporization of water |
| enthalpyOfLiquid
|
Return enthalpy of liquid water |
| enthalpyOfGas
|
Return specific enthalpy of gas (air and steam) |
| enthalpyOfCondensingGas
|
Return specific enthalpy of steam |
| enthalpyOfNonCondensingGas
|
Return specific enthalpy of dry air |
| enthalpyOfDryAir
|
Return specific enthalpy of dry air |
| enthalpyOfWater
|
Return specific enthalpy of water (solid + liquid + steam) |
| enthalpyOfWaterVapor
|
Return specific enthalpy of steam |
| enthalpyOfWaterNonVapor
|
Return enthalpy of liquid and solid water |
| pressure
|
Returns pressure of ideal gas as a function of the thermodynamic state record |
| temperature
|
Return temperature of ideal gas as a function of the thermodynamic state record |
| density
|
Returns density as a function of the thermodynamic state record |
| specificEnthalpy
|
Return specific enthalpy of moist air as a function of the thermodynamic state record |
| specificInternalEnergy
|
Return specific internal energy of moist air as a function of the thermodynamic state record |
| specificEntropy
|
Return specific entropy from thermodynamic state record, only valid for phi<1 |
| specificGibbsEnergy
|
Return specific Gibbs energy as a function of the thermodynamic state record, only valid for phi<1 |
| specificHelmholtzEnergy
|
Return specific Helmholtz energy as a function of the thermodynamic state record, only valid for phi<1 |
| specificHeatCapacityCp
|
Return specific heat capacity at constant pressure as a function of the thermodynamic state record |
| specificHeatCapacityCv
|
Return specific heat capacity at constant volume as a function of the thermodynamic state record |
| isentropicExponent
|
Return isentropic exponent |
| isentropicEnthalpy
|
Return isentropic enthalpy |
| velocityOfSound
|
Return velocity of sound |
| molarMass
|
Return the molar mass of the medium |
| dynamicViscosity
|
Return dynamic viscosity as a function of the thermodynamic state record, valid from 73.15 K to 373.15 K |
| thermalConductivity
|
Return thermal conductivity as a function of the thermodynamic state record, valid from 73.15 K to 373.15 K |
 Utilities
|
Utility package for moist air |
| Inherited |
 specificEntropy_phX
|
Return specific entropy as a function of pressure, specific enthalpy and mass fractions |
| fluidConstants={Utilities.Water95_Utilities.waterConstants,Modelica.Media.Air.ReferenceAir.airConstants} |
Constant data for the fluid |
 moleToMassFractions
|
Return mass fractions X from mole fractions |
| massToMoleFractions
|
Return mole fractions from mass fractions X |
| ThermoStates=Modelica.Media.Interfaces.Choices.IndependentVariables.pTX |
Enumeration type for independent variables |
| mediumName="Moist air" |
Name of the medium |
| substanceNames={"Water","Air"} |
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=false |
= 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={0.01,0.99} |
Default mass fractions of medium |
| p_default=101325 |
Default value for pressure of medium (for initialization) |
| T_default=Modelica.Units.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 |
 FluidConstants
|
Critical, triple, molecular and other standard data of fluid |
 prandtlNumber
|
Return the Prandtl number |
 heatCapacity_cp
|
Alias for deprecated name |
| heatCapacity_cv
|
Alias for deprecated name |
| isobaricExpansionCoefficient
|
Return overall the isobaric expansion coefficient beta |
| beta
|
Alias for isobaricExpansionCoefficient for user convenience |
| isothermalCompressibility
|
Return overall the isothermal compressibility factor |
| kappa
|
Alias of isothermalCompressibility for user convenience |
| density_derp_h
|
Return density derivative w.r.t. pressure at const specific enthalpy |
| density_derh_p
|
Return density derivative w.r.t. specific enthalpy at constant pressure |
| density_derp_T
|
Return density derivative w.r.t. pressure at const temperature |
| density_derT_p
|
Return density derivative w.r.t. temperature at constant pressure |
| density_derX
|
Return density derivative w.r.t. mass fraction |
| specificEnthalpy_pTX
|
Return specific enthalpy from p, T, and X or Xi |
| specificEntropy_pTX
|
Return specific enthalpy from p, T, and X or Xi |
| density_pTX
|
Return density 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 |
| temperature_psX
|
Return temperature from p,s, and X or Xi |
| density_psX
|
Return density from p, s, and X or Xi |
| specificEnthalpy_psX
|
Return specific enthalpy from p, s, and X or Xi |
 MassFlowRate
|
Type for mass flow rate with medium specific attributes |
 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 |
| 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 respect to pressure with medium specific attributes |
| DerDensityByEnthalpy
|
Type for partial derivative of density with respect to enthalpy with medium specific attributes |
| DerEnthalpyByPressure
|
Type for partial derivative of enthalpy with respect to pressure with medium specific attributes |
| DerDensityByTemperature
|
Type for partial derivative of density with respect to temperature with medium specific attributes |
| DerTemperatureByPressure
|
Type for partial derivative of temperature with respect to pressure with medium specific attributes |
 SaturationProperties
|
Saturation properties of two phase medium |
| FluidLimits
|
Validity limits for fluid model |
 FixedPhase
|
Phase of the fluid: 1 for 1-phase, 2 for two-phase, 0 for not known, e.g., interactive use |
 Basic
|
The most basic version of a record used in several degrees of detail |
| IdealGas
|
The ideal gas version of a record used in several degrees of detail |
| TwoPhase
|
The two phase fluid version of a record used in several degrees of detail |
ThermodynamicState record for moist air
Information
Extends from (Thermodynamic state variables).
Moist air base properties record
Information
Extends from (Base properties (p, d, T, h, u, R_s, MM and, if applicable, X and Xi) of a medium).
Parameters
| Name | Description |
|---|
| standardOrderComponents | If true, and reducedX = true, the last element of X will be computed from the other ones |
| Advanced |
| preferredMediumStates | = true if StateSelect.prefer shall be used for the independent property variables of the medium |
Return thermodynamic state as function of pressure p, temperature T and composition X
Information
Extends from (Return thermodynamic state as function of p, T and composition X or Xi).
Inputs
Outputs
| Name | Description |
|---|
| state | Thermodynamic state record |
Return thermodynamic state as function of pressure p, specific enthalpy h and composition X
Information
Extends from (Return thermodynamic state as function of p, h and composition X or Xi).
Inputs
Outputs
| Name | Description |
|---|
| state | Thermodynamic state record |
Return thermodynamic state as function of pressure p, specific enthalpy h and composition X
Information
Extends from (Return thermodynamic state as function of p, s and composition X or Xi).
Inputs
Outputs
| Name | Description |
|---|
| state | Thermodynamic state record |
Return thermodynamic state as function of density d, temperature T and composition X
Information
Extends from (Return thermodynamic state as function of d, T and composition X or Xi).
Inputs
Outputs
| Name | Description |
|---|
| state | Thermodynamic state record |
Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b
Information
Extends from (Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b).
Inputs
Outputs
| Name | Description |
|---|
| state | Smooth thermodynamic state for all x (continuous and differentiable) |
Return absolute humidity per unit mass of moist air at saturation as a function of the thermodynamic state record
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| X_sat | Steam mass fraction of sat. boundary [kg/kg] |
Return absolute humidity per unit mass of dry air at saturation as a function of the thermodynamic state record
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| x_sat | Absolute humidity per unit mass of dry air [kg/kg] |
Return mass fractions as a function of pressure, temperature and relative humidity
Information
Extends from (Return mass fractions as a function of pressure, temperature and relative humidity).
Inputs
Outputs
| Name | Description |
|---|
| X[:] | Mass fractions [kg/kg] |
Return mass fraction of water vapor
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| X | Mass fraction of water vapor [kg/kg] |
Return mass fraction of liquid and solid water
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| X | Mass fraction of water varpor [kg/kg] |
Return saturation mass fractions
Information
Extends from (Return saturation mass fractions).
Inputs
Outputs
| Name | Description |
|---|
| Xsat[:] | Saturation mass fractions [kg/kg] |
Return mass fvraction at saturation boundary given pressure and saturation pressure
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| X[:] | Mass fraction [kg/kg] |
Return mass fractions as a function of pressure, temperature and absolute humidity in kg(water)/kg(dry air)
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| X[:] | Mass fractions [kg/kg] |
Return water content in kg(water)/kg(dry air) given mass fractions
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| xw | Water content in kg(water)/kg(dry air) |
Return relative humidity
Information
Extends from (Return relative humidity).
Inputs
Outputs
| Name | Description |
|---|
| phi | Relative humidity |
Return ideal gas constant as a function from thermodynamic state, only valid for phi<1
Information
Extends from (Return the gas constant of the mixture (also for liquids)).
Inputs
Outputs
| Name | Description |
|---|
| R_s | Mixture gas constant [J/(kg.K)] |
Return saturation pressure of water as a function of temperature T
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| psat | Saturation pressure [Pa] |
Return sublimation pressure of water as a function of temperature T between 223.16 and 273.16 K
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| psat | Sublimation pressure [Pa] |
Return saturation pressure of condensing fluid
Information
Extends from (Return saturation pressure of condensing fluid).
Inputs
Outputs
| Name | Description |
|---|
| psat | Saturation pressure [Pa] |
Return saturation temperature of condensing fluid
Information
Extends from (Return saturation temperature of condensing fluid).
Inputs
Outputs
| Name | Description |
|---|
| Tsat | Saturation temperature [K] |
Return enthalpy of vaporization of water
Information
Extends from (Return vaporization enthalpy of condensing fluid).
Inputs
Outputs
| Name | Description |
|---|
| r0 | Vaporization enthalpy [J/kg] |
Return enthalpy of liquid water
Information
Extends from (Return liquid enthalpy of condensing fluid).
Inputs
Outputs
| Name | Description |
|---|
| h | Liquid enthalpy [J/kg] |
Return specific enthalpy of gas (air and steam)
Information
Extends from (Return enthalpy of non-condensing gas mixture).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Return specific enthalpy of steam
Information
Extends from (Return enthalpy of condensing gas (most often steam)).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Return specific enthalpy of dry air
Information
Extends from (Return enthalpy of the non-condensing species).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Return specific enthalpy of dry air
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Return specific enthalpy of water (solid + liquid + steam)
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy of water [J/kg] |
Return specific enthalpy of steam
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Return enthalpy of liquid and solid water
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy of water [J/kg] |
Returns pressure of ideal gas as a function of the thermodynamic state record
Information
Extends from (Return pressure).
Inputs
Outputs
| Name | Description |
|---|
| p | Pressure [Pa] |
Return temperature of ideal gas as a function of the thermodynamic state record
Information
Extends from (Return temperature).
Inputs
Outputs
| Name | Description |
|---|
| T | Temperature [K] |
Returns density as a function of the thermodynamic state record
Information
Extends from (Return density).
Inputs
Outputs
| Name | Description |
|---|
| d | Density [kg/m3] |
Return specific enthalpy of moist air as a function of the thermodynamic state record
Information
Extends from (Return specific enthalpy).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Return specific internal energy of moist air as a function of the thermodynamic state record
Information
Extends from (Return specific internal energy).
Inputs
Outputs
| Name | Description |
|---|
| u | Specific internal energy [J/kg] |
Return specific entropy from thermodynamic state record, only valid for phi<1
Information
Extends from (Return specific entropy).
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Return specific Gibbs energy as a function of the thermodynamic state record, only valid for phi<1
Information
Extends from (Return specific Gibbs energy).
Inputs
Outputs
| Name | Description |
|---|
| g | Specific Gibbs energy [J/kg] |
Return specific Helmholtz energy as a function of the thermodynamic state record, only valid for phi<1
Information
Extends from (Return specific Helmholtz energy).
Inputs
Outputs
| Name | Description |
|---|
| f | Specific Helmholtz energy [J/kg] |
Return specific heat capacity at constant pressure as a function of the thermodynamic state record
Information
Extends from (Return specific heat capacity at constant pressure).
Inputs
Outputs
| Name | Description |
|---|
| cp | Specific heat capacity at constant pressure [J/(kg.K)] |
Return specific heat capacity at constant volume as a function of the thermodynamic state record
Information
Extends from (Return specific heat capacity at constant volume).
Inputs
Outputs
| Name | Description |
|---|
| cv | Specific heat capacity at constant volume [J/(kg.K)] |
Return isentropic exponent
Information
Extends from (Return isentropic exponent).
Inputs
Outputs
| Name | Description |
|---|
| gamma | Isentropic exponent [1] |
Return isentropic enthalpy
Information
Extends from (Return isentropic enthalpy).
Inputs
Outputs
| Name | Description |
|---|
| h_is | Isentropic enthalpy [J/kg] |
Return velocity of sound
Information
Extends from (Return velocity of sound).
Inputs
Outputs
| Name | Description |
|---|
| a | Velocity of sound [m/s] |
Return the molar mass of the medium
Information
Extends from (Return the molar mass of the medium).
Inputs
Outputs
| Name | Description |
|---|
| MM | Mixture molar mass [kg/mol] |
Return dynamic viscosity as a function of the thermodynamic state record, valid from 73.15 K to 373.15 K
Information
Extends from (Return dynamic viscosity).
Inputs
Outputs
| Name | Description |
|---|
| eta | Dynamic viscosity [Pa.s] |
Return thermal conductivity as a function of the thermodynamic state record, valid from 73.15 K to 373.15 K
Information
Extends from (Return thermal conductivity).
Inputs
Outputs
| Name | Description |
|---|
| lambda | Thermal conductivity [W/(m.K)] |
Automatically generated Thu Oct 1 16:08:04 2020.
Modelica.Media.Air.ReferenceMoistAir.ThermodynamicState
Modelica.Media.Air.ReferenceMoistAir.BaseProperties
Modelica.Media.Air.ReferenceMoistAir.setState_pTX