Package Modelica.Media.R134a.R134a_ph
Medium model for R134a and p,h as states

Information

Calculation of fluid properties for Tetrafluoroethane (R134a) in the fluid region of 0.0039 bar (Triple pressure) to 700 bar and 169.85 Kelvin (Triple temperature) to 455 Kelvin.

Restriction

The functions provided by this package shall be used inside of the restricted limits according to the referenced literature.

0.0039 bar ≤ p ≤ 700 bar
169.85 Kelvin ≤ T ≤ 455 Kelvin
explicit for pressure and specific enthalpy

References

Baehr, H.D. and Tillner-Roth, R.:: Thermodynamic Properties of Environmentally Acceptable Refrigerants - Equations of State and Tables for Ammonia, R22, R134a, R152a, and R123. Springer-Verlag, Berlin (Germany), 1994.

Klein, McLinden and Laesecke:: An improved extended corresponding states method for estimation of viscosity of pure refrigerants and mixtures. Int. J. Refrig., Vol. 20, No.3, pp. 208-217, 1997.

McLinden, Klein. and Perkins:: An extended corresponding states model for the thermal conductivity of refrigerants and refrigerant mixtures. Int. J. Refrig., 23 (2000) 43-63.

Okada and Higashi:: Surface tension correlation of HFC-134a and HCFC-123. Proceedings of the Joint Meeting of IIR Commissions B1, B2, E1, and E2, Padua, Italy, pp. 541-548, 1994.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium (Base class for two phase medium of one substance).

Package Contents

Name	Description
`AbsolutePressure`	Type for absolute pressure with medium specific attributes
`BaseProperties`	Base properties of R134a
`Basic` …	The most basic version of a record used in several degrees of detail
`beta`	Alias for isobaricExpansionCoefficient for user convenience
`bubbleDensity`	Density of liquid phase w.r.t saturation pressure \| use setSat_p function for input
`bubbleEnthalpy`	Specific enthalpy of liquid phase w.r.t saturation pressure \| use setSat_p function for input
`bubbleEntropy`	Specific entropy of liquid phase w.r.t saturation pressure \| use setSat_p function for input
`Choices` …
`CumulativeExtraProperty`	Type for conserved integral of unspecified, mass specific property
`dBubbleDensity_dPressure`	Derivative of liquid density in two-phase region w.r.t pressure
`dBubbleDensity_dPressure_der_sat`	Time derivative of liquid density in two-phase region w.r.t pressure
`dBubbleEnthalpy_dPressure`	Derivative of liquid specific enthalpy in two-phase region w.r.t pressure
`dBubbleEnthalpy_dPressure_der_sat`	Time derivative of liquid specific enthalpy in two-phase region w.r.t pressure
`dBubbleEntropy_dPressure`	Derivative of liquid specific entropy in two-phase region w.r.t pressure \| use setState_phX function for input
`dBubbleEntropy_dPressure_der_sat`	Time derivative of liquid specific entropy in two-phase region w.r.t pressure \| use setState_phX function for input
`dDewDensity_dPressure`	Derivative of vapor density in two-phase region w.r.t pressure
`dDewDensity_dPressure_der_sat`	Time derivative of vapor density in two-phase region w.r.t pressure
`dDewEnthalpy_dPressure`	Derivative of vapor specific enthalpy in two-phase region w.r.t pressure
`dDewEnthalpy_dPressure_der_sat`	Time derivative of vapor specific enthalpy in two-phase region w.r.t pressure
`dDewEntropy_dPressure`	Derivative of vapor specific entropy in two-phase region w.r.t pressure \| use setState_phX function for input
`dDewEntropy_dPressure_der_sat`	Time derivative of vapor specific entropy in two-phase region w.r.t pressure \| use setState_phX function for input
`Density`	Type for density with medium specific attributes
`density`	Density as function of pressure and specific enthalpy \| use setState_phX function for input
`density_derh_p`	Density derivative by specific enthalpy \| use setState_phX function for input
`density_derp_h`	Density derivative by pressure \| use setState_phX function for input
`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
`density_ph`	Density as function of pressure and specific enthalpy
`density_phX`	Return density from p, h, and X or Xi
`density_ps`	Return density from p and s
`density_psX`	Return density from p, s, and X or Xi
`density_pT`	Return density from p and T
`density_pTX`	Return density from p, T, and X or Xi
`DerDensityByEnthalpy`	Type for partial derivative of density with respect to enthalpy with medium specific attributes
`DerDensityByPressure`	Type for partial derivative of density with respect to pressure with medium specific attributes
`DerDensityByTemperature`	Type for partial derivative of density with respect to temperature with medium specific attributes
`DerEnthalpyByPressure`	Type for partial derivative of enthalpy with respect to pressure with medium specific attributes
`derivsOf_ph`	Derivatives required for inversion of temperature and density functions
`DerTemperatureByPressure`	Type for partial derivative of temperature with respect to pressure with medium specific attributes
`dewDensity`	Density of vapor phase w.r.t saturation pressure \| use setSat_p function for input
`dewEnthalpy`	Specific enthalpy of vapor phase w.r.t saturation pressure \| use setSat_p function for input
`dewEntropy`	Specific entropy of vapor phase w.r.t saturation pressure \| use setSat_p function for input
`DipoleMoment`	Type for dipole moment with medium specific attributes
`dofpT`	Compute d for given p and T
`dt_ph`	Density and temperature w.r.t. pressure and specific enthalpy
`dtofphOnePhase`	Density and temperature w.r.t. pressure and specific enthalpy in one-phase region
`dtofpsOnePhase`	Inverse iteration in one phase region (d,T) = f(p,s)
`DynamicViscosity`	Type for dynamic viscosity with medium specific attributes
`dynamicViscosity`	Dynamic viscosity w.r.t. temperature and density \| use setState_phX function for input
`EnthalpyFlowRate`	Type for enthalpy flow rate with medium specific attributes
`ExtraProperty`	Type for unspecified, mass-specific property transported by flow
`ExtraPropertyFlowRate`	Type for flow rate of unspecified, mass-specific property
`f_R134a`	Calculation of helmholtz derivatives by density and temperature
`fid_R134a`	Helmholtz coefficients of ideal part
`FixedPhase`	Phase of the fluid: 1 for 1-phase, 2 for two-phase, 0 for not known, e.g., interactive use
`FluidConstants`
`FluidLimits`	Validity limits for fluid model
`fres_R134a`	Calculation of helmholtz derivatives
`getPhase_ph`	Number of phases by pressure and specific enthalpy
`getPhase_ps`	Number of phases by pressure and entropy
`heatCapacity_cp`	Alias for deprecated name
`heatCapacity_cv`	Alias for deprecated name
`hofpsTwoPhase`	Isentropic specific enthalpy in two phase region h(p,s)
`hofpT`	Compute h for given p and T
`IdealGas` …	The ideal gas version of a record used in several degrees of detail
`isentropicEnthalpy`	Isentropic enthalpy of downstream pressure and upstream thermodynamic state (specific entropy)
`IsentropicExponent`	Type for isentropic exponent with medium specific attributes
`isentropicExponent`	Isentropic exponent gamma w.r.t. thermodynamic state \| not defined in two-phase region \| use setState_phX function for input
`IsobaricExpansionCoefficient`	Type for isobaric expansion coefficient with medium specific attributes
`isobaricExpansionCoefficient`	Isobaric expansion coefficient w.r.t. thermodynamic state (only valid for one-phase)
`isothermalCompressibility`	Isothermal compressibility w.r.t. thermodynamic state (only valid for one-phase)
`kappa`	Alias of isothermalCompressibility for user convenience
`MassFlowRate`	Type for mass flow rate with medium specific attributes
`MassFraction`	Type for mass fraction with medium specific attributes
`MolarMass`	Type for molar mass with medium specific attributes
`molarMass`	Return the molar mass of the medium
`MolarVolume`	Type for molar volume with medium specific attributes
`MoleFraction`	Type for mole fraction with medium specific attributes
`phaseBoundaryAssert`	Assert function for checking threshold to phase boundary
`PrandtlNumber`	Type for Prandtl number with medium specific attributes
`prandtlNumber`	Return the Prandtl number
`pressure`	Pressure w.r.t. thermodynamic state
`pressure_dT`	Return pressure from d and T
`R134a_liqofdT`	Properties on liquid boundary phase
`R134a_vapofdT`	Properties on vapor boundary phase
`rho_ph_der`	Time derivative function of density_ph
`rho_props_ph`	Density as function of pressure and specific enthalpy
`saturationPressure`	Saturation pressure w.r.t. temperature
`saturationPressure_sat`	Return saturation temperature
`SaturationProperties`
`saturationTemperature`	Saturation temperature in two-phase region
`saturationTemperature_der_p`	Time derivative of saturation temperature in two-phase region
`saturationTemperature_derp`	Derivative of saturation temperature in two-phase region
`saturationTemperature_derp_sat`	Return derivative of saturation temperature w.r.t. pressure
`saturationTemperature_sat`	Return saturation temperature
`setBubbleState`	Return the thermodynamic state on the bubble line
`setDewState`	Return the thermodynamic state on the dew line
`setSat_p`	Return saturation property record from pressure
`setSat_T`	Return saturation property record from temperature
`setSmoothState`	Smooth transition function between state_a and state_b
`setState_dT`	Return thermodynamic state from d and T
`setState_dTX`	Set state for density and temperature (X not used since single substance)
`setState_ph`	Return thermodynamic state from p and h
`setState_phX`	Set state for pressure and specific enthalpy (X not used since single substance)
`setState_ps`	Return thermodynamic state from p and s
`setState_psX`	Set state for pressure and specific entropy (X not used since single substance)
`setState_pT`	Return thermodynamic state from p and T
`setState_pTX`	Set state for pressure and temperature (X not used since single substance)
`setState_px`	Return thermodynamic state from pressure and vapour quality
`setState_Tx`	Return thermodynamic state from temperature and vapour quality
`SpecificEnergy`	Type for specific energy with medium specific attributes
`SpecificEnthalpy`	Type for specific enthalpy with medium specific attributes
`specificEnthalpy`	Specific enthalpy w.r.t. thermodynamic state \| use setState_phX function for input
`specificEnthalpy_dT`	Return specific enthalpy from d and T
`specificEnthalpy_ps`	Return specific enthalpy from p and s
`specificEnthalpy_psX`	Return specific enthalpy from p, s, and X or Xi
`specificEnthalpy_pT`	Return specific enthalpy from p and T
`specificEnthalpy_pTX`	Return specific enthalpy from pressure, temperature and mass fraction
`SpecificEntropy`	Type for specific entropy with medium specific attributes
`specificEntropy`	Specific entropy w.r.t. thermodynamic state \| use setState_phX function for input if necessary
`specificEntropy_pTX`	Return specific enthalpy from p, T, and X or Xi
`specificGibbsEnergy`	Specific gibbs energy w.r.t. thermodynamic state
`SpecificHeatCapacity`	Type for specific heat capacity with medium specific attributes
`specificHeatCapacityCp`	Specific heat capacity at constant pressure \| turns infinite in two-phase region! \| use setState_phX function for input
`specificHeatCapacityCv`	Specific heat capacity at constant volume \| use setState_phX function for input
`specificHelmholtzEnergy`	Helmholtz energy w.r.t. thermodynamic state
`SpecificInternalEnergy`	Type for specific internal energy with medium specific attributes
`specificInternalEnergy`	Specific internal energy w.r.t. thermodynamic state
`SurfaceTension`	Type for surface tension with medium specific attributes
`surfaceTension`	Surface tension as a function of temperature (below critical point)
`T_ph_der`	Time derivative function of T_ph
`T_props_ph`	Temperature as function of pressure and specific enthalpy
`Temperature`	Type for temperature with medium specific attributes
`temperature`	Temperature as function of pressure and specific enthalpy \| use setState_phX function for input
`temperature_ph`	Temperature as function of pressure and specific enthalpy
`temperature_phX`	Return temperature from p, h, and X or Xi
`temperature_ps`	Return temperature from p and s
`temperature_psX`	Return temperature from p, s, and X or Xi
`ThermalConductivity`	Type for thermal conductivity with medium specific attributes
`thermalConductivity`	Thermal conductivity w.r.t. thermodynamic state \| use setState_phX function for input
`ThermodynamicState`	Thermodynamic state
`TwoPhase` …	The two phase fluid version of a record used in several degrees of detail
`vapourQuality`	Return vapour quality
`VelocityOfSound`	Type for velocity of sound with medium specific attributes
`velocityOfSound`	Velocity of sound w.r.t. thermodynamic state (only valid for one-phase)

Package Constants

Type	Name	Value	Description
`ExtraProperty`	`C_default[nC]`	`fill(0, nC)`	Default value for trace substances of medium (for initialization)
`Real`	`C_nominal[nC]`	`1e-6 * ones(nC)`	Default for the nominal values for the extra properties
`Boolean`	`dT_explicit`	`false`
`String`	`extraPropertiesNames[:]`	`fill("", 0)`	Names of the additional (extra) transported properties. Set extraPropertiesNames=fill("",0) if unused
`final` `Boolean`	`fixedX`	`true`	= true if medium contains the equation X = reference_X
`FluidConstants`	`fluidConstants[nS]`	`r134aConstants`	Constant data for the fluid
`SpecificEnthalpy`	`h_default`	`420000`	Default value for specific enthalpy of medium (for initialization)
`String`	`mediumName`	`"R134a_ph"`	Name of the medium
`final` `Integer`	`nC`	`size(extraPropertiesNames, 1)`	Number of extra (outside of standard mass-balance) transported properties
`final` `Integer`	`nS`	`size(substanceNames, 1)`	Number of substances
`Integer`	`nX`	`nS`	Number of mass fractions
`Integer`	`nXi`	`if fixedX then 0 else if reducedX then nS - 1 else nS`	Number of structurally independent mass fractions (see docu for details)
`Boolean`	`onePhase`	`false`	True if the (derived) model should never be called with two-phase inputs
`AbsolutePressure`	`p_default`	`101325`	Default value for pressure of medium (for initialization)
`Boolean`	`ph_explicit`	`true`
`final` `Boolean`	`reducedX`	`true`	= true if medium contains the equation sum(X) = 1.0; set reducedX=true if only one substance (see docu for details)
`AbsolutePressure`	`reference_p`	`101325`	Reference pressure of Medium: default 1 atmosphere
`Temperature`	`reference_T`	`298.15`	Reference temperature of Medium: default 25 deg Celsius
`MassFraction`	`reference_X[nX]`	`fill(nX ^ (-1), nX)`	Default mass fractions of medium
`Boolean`	`singleState`	`false`	= true, if u and d are not a function of pressure
`Boolean`	`smoothModel`	`false`	True if the (derived) model should not generate state events
`String`	`substanceNames[:]`	`{"tetrafluoroethan"}`	Names of the mixture substances. Set substanceNames={mediumName} if only one substance.
`Temperature`	`T_default`	`Modelica.SIunits.Conversions.from_degC(20)`	Default value for temperature of medium (for initialization)
`IndependentVariables`	`ThermoStates`	`Modelica.Media.Interfaces.Choices.IndependentVariables.ph`	Enumeration type for independent variables
`MassFraction`	`X_default[nX]`	`reference_X`	Default value for mass fractions of medium (for initialization)

Type Modelica.Media.R134a.R134a_ph.AbsolutePressure
Type for absolute pressure with medium specific attributes

Extends from Modelica.SIunits.AbsolutePressure.

Attributes

Name	Value
`quantity`	`"Pressure"`
`unit`	`"Pa"`
`displayUnit`	`"bar"`
`min`	`0`
`max`	`1e+8`
`start`	`p_default`
`nominal`	`1000000`

Type Modelica.Media.R134a.R134a_ph.Density
Type for density with medium specific attributes

Extends from Modelica.SIunits.Density.

Attributes

Name	Value
`quantity`	`"Density"`
`unit`	`"kg/m3"`
`displayUnit`	`"g/cm3"`
`min`	`0`
`max`	`100000`
`start`	`4`
`nominal`	`500`

Type Modelica.Media.R134a.R134a_ph.DynamicViscosity
Type for dynamic viscosity with medium specific attributes

Extends from Modelica.SIunits.DynamicViscosity.

Attributes

Name	Value
`quantity`	`"DynamicViscosity"`
`unit`	`"Pa.s"`
`min`	`0`
`max`	`1e+8`
`start`	`0.001`
`nominal`	`0.001`

Type Modelica.Media.R134a.R134a_ph.EnthalpyFlowRate
Type for enthalpy flow rate with medium specific attributes

Extends from Modelica.SIunits.EnthalpyFlowRate.

Attributes

Name	Value
`quantity`	`"EnthalpyFlowRate"`
`unit`	`"W"`
`min`	`-1e+8`
`max`	`1e+8`
`start`	`0.`
`nominal`	`1000`

Type Modelica.Media.R134a.R134a_ph.MassFraction
Type for mass fraction with medium specific attributes

Extends from Real.

Attributes

Name	Value
`quantity`	`"MassFraction"`
`unit`	`"kg/kg"`
`min`	`0`
`max`	`1`
`start`	`0.`
`nominal`	`0.1`

Type Modelica.Media.R134a.R134a_ph.MoleFraction
Type for mole fraction with medium specific attributes

Extends from Real.

Attributes

Name	Value
`quantity`	`"MoleFraction"`
`unit`	`"mol/mol"`
`min`	`0`
`max`	`1`
`start`	`0.`
`nominal`	`0.1`

Type Modelica.Media.R134a.R134a_ph.MolarMass
Type for molar mass with medium specific attributes

Extends from Modelica.SIunits.MolarMass.

Attributes

Name	Value
`quantity`	`"MolarMass"`
`unit`	`"kg/mol"`
`min`	`0.001`
`max`	`0.25`
`start`	`0.`
`nominal`	`0.032`

Type Modelica.Media.R134a.R134a_ph.MolarVolume
Type for molar volume with medium specific attributes

Extends from Modelica.SIunits.MolarVolume.

Attributes

Name	Value
`quantity`	`"MolarVolume"`
`unit`	`"m3/mol"`
`min`	`1e-6`
`max`	`1000000`
`start`	`0.`
`nominal`	`1`

Type Modelica.Media.R134a.R134a_ph.IsentropicExponent
Type for isentropic exponent with medium specific attributes

Extends from Modelica.SIunits.RatioOfSpecificHeatCapacities.

Attributes

Name	Value
`quantity`	`"RatioOfSpecificHeatCapacities"`
`unit`	`"1"`
`min`	`1`
`max`	`500000`
`start`	`1.2`
`nominal`	`1.2`

Type Modelica.Media.R134a.R134a_ph.SpecificEnergy
Type for specific energy with medium specific attributes

Extends from Modelica.SIunits.SpecificEnergy.

Attributes

Name	Value
`quantity`	`"SpecificEnergy"`
`unit`	`"J/kg"`
`min`	`-1e+8`
`max`	`1e+8`
`start`	`0.`
`nominal`	`1000000`

Type Modelica.Media.R134a.R134a_ph.SpecificInternalEnergy
Type for specific internal energy with medium specific attributes

Extends from Modelica.Media.R134a.R134a_ph.SpecificEnergy (Type for specific energy with medium specific attributes).

Attributes

Name	Value
`quantity`	`"SpecificEnergy"`
`unit`	`"J/kg"`
`min`	`-1e+8`
`max`	`1e+8`
`start`	`0.`
`nominal`	`1000000`

Type Modelica.Media.R134a.R134a_ph.SpecificEnthalpy
Type for specific enthalpy with medium specific attributes

Extends from Modelica.SIunits.SpecificEnthalpy.

Attributes

Name	Value
`quantity`	`"SpecificEnergy"`
`unit`	`"J/kg"`
`min`	`-1e+10`
`max`	`1e+10`
`start`	`h_default`
`nominal`	`500000`

Type Modelica.Media.R134a.R134a_ph.SpecificEntropy
Type for specific entropy with medium specific attributes

Extends from Modelica.SIunits.SpecificEntropy.

Attributes

Name	Value
`quantity`	`"SpecificEntropy"`
`unit`	`"J/(kg.K)"`
`min`	`-1e+7`
`max`	`1e+7`
`start`	`0.`
`nominal`	`1000`

Type Modelica.Media.R134a.R134a_ph.SpecificHeatCapacity
Type for specific heat capacity with medium specific attributes

Extends from Modelica.SIunits.SpecificHeatCapacity.

Attributes

Name	Value
`quantity`	`"SpecificHeatCapacity"`
`unit`	`"J/(kg.K)"`
`min`	`0`
`max`	`1e+7`
`start`	`1000`
`nominal`	`1000`

Type Modelica.Media.R134a.R134a_ph.SurfaceTension
Type for surface tension with medium specific attributes

Extends from Modelica.SIunits.SurfaceTension.

Attributes

Name	Value
`quantity`	`"SurfaceTension"`
`unit`	`"N/m"`
`min`	`-Modelica.Constants.inf`
`max`	`Modelica.Constants.inf`
`start`	`0.`

Type Modelica.Media.R134a.R134a_ph.Temperature
Type for temperature with medium specific attributes

Extends from Modelica.SIunits.Temperature.

Attributes

Name	Value
`quantity`	`"ThermodynamicTemperature"`
`unit`	`"K"`
`displayUnit`	`"degC"`
`min`	`1`
`max`	`10000`
`start`	`T_default`
`nominal`	`350`

Type Modelica.Media.R134a.R134a_ph.ThermalConductivity
Type for thermal conductivity with medium specific attributes

Extends from Modelica.SIunits.ThermalConductivity.

Attributes

Name	Value
`quantity`	`"ThermalConductivity"`
`unit`	`"W/(m.K)"`
`min`	`0`
`max`	`500`
`start`	`1`
`nominal`	`1`

Type Modelica.Media.R134a.R134a_ph.PrandtlNumber
Type for Prandtl number with medium specific attributes

Extends from Modelica.SIunits.PrandtlNumber.

Attributes

Name	Value
`quantity`	`"PrandtlNumber"`
`unit`	`"1"`
`min`	`0.001`
`max`	`100000`
`start`	`0.`
`nominal`	`1`

Type Modelica.Media.R134a.R134a_ph.VelocityOfSound
Type for velocity of sound with medium specific attributes

Extends from Modelica.SIunits.Velocity.

Attributes

Name	Value
`quantity`	`"Velocity"`
`unit`	`"m/s"`
`min`	`0`
`max`	`100000`
`start`	`1000`
`nominal`	`1000`

Type Modelica.Media.R134a.R134a_ph.ExtraProperty
Type for unspecified, mass-specific property transported by flow

Extends from Real.

Attributes

Name	Value
`min`	`0`
`max`	`Modelica.Constants.inf`
`start`	`1`

Type Modelica.Media.R134a.R134a_ph.CumulativeExtraProperty
Type for conserved integral of unspecified, mass specific property

Extends from Real.

Attributes

Name	Value
`min`	`0`
`max`	`Modelica.Constants.inf`
`start`	`1`

Type Modelica.Media.R134a.R134a_ph.ExtraPropertyFlowRate
Type for flow rate of unspecified, mass-specific property

Extends from Real.

Attributes

Name	Value
`unit`	`"kg/s"`
`min`	`-Modelica.Constants.inf`
`max`	`Modelica.Constants.inf`
`start`	`0.`

Type Modelica.Media.R134a.R134a_ph.IsobaricExpansionCoefficient
Type for isobaric expansion coefficient with medium specific attributes

Extends from Real.

Attributes

Name	Value
`unit`	`"1/K"`
`min`	`0`
`max`	`1e+8`
`start`	`0.`

Type Modelica.Media.R134a.R134a_ph.DipoleMoment
Type for dipole moment with medium specific attributes

Extends from Real.

Attributes

Name	Value
`quantity`	`"ElectricDipoleMoment"`
`unit`	`"debye"`
`min`	`0`
`max`	`2`
`start`	`0.`

Type Modelica.Media.R134a.R134a_ph.DerDensityByPressure
Type for partial derivative of density with respect to pressure with medium specific attributes

Extends from Modelica.SIunits.DerDensityByPressure.

Attributes

Name	Value
`unit`	`"s2/m2"`
`min`	`-Modelica.Constants.inf`
`max`	`Modelica.Constants.inf`
`start`	`0.`

Type Modelica.Media.R134a.R134a_ph.DerDensityByEnthalpy
Type for partial derivative of density with respect to enthalpy with medium specific attributes

Extends from Modelica.SIunits.DerDensityByEnthalpy.

Attributes

Name	Value
`unit`	`"kg.s2/m5"`
`min`	`-Modelica.Constants.inf`
`max`	`Modelica.Constants.inf`
`start`	`0.`

Type Modelica.Media.R134a.R134a_ph.DerEnthalpyByPressure
Type for partial derivative of enthalpy with respect to pressure with medium specific attributes

Extends from Modelica.SIunits.DerEnthalpyByPressure.

Attributes

Name	Value
`unit`	`"J.m.s2/kg2"`
`min`	`-Modelica.Constants.inf`
`max`	`Modelica.Constants.inf`
`start`	`0.`

Type Modelica.Media.R134a.R134a_ph.DerDensityByTemperature
Type for partial derivative of density with respect to temperature with medium specific attributes

Extends from Modelica.SIunits.DerDensityByTemperature.

Attributes

Name	Value
`unit`	`"kg/(m3.K)"`
`min`	`-Modelica.Constants.inf`
`max`	`Modelica.Constants.inf`
`start`	`0.`

Type Modelica.Media.R134a.R134a_ph.DerTemperatureByPressure
Type for partial derivative of temperature with respect to pressure with medium specific attributes

Extends from Real.

Attributes

Name	Value
`unit`	`"K/Pa"`
`min`	`-Modelica.Constants.inf`
`max`	`Modelica.Constants.inf`
`start`	`0.`

Record Modelica.Media.R134a.R134a_ph.SaturationProperties
Saturation properties of two phase medium

Information

This icon is indicates a record.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.SaturationProperties (Saturation properties of two phase medium).

Fields

Type	Name	Description
`AbsolutePressure`	`psat`	Saturation pressure
`Temperature`	`Tsat`	Saturation temperature

Record Modelica.Media.R134a.R134a_ph.FluidLimits
Validity limits for fluid model

Information

The minimum pressure mostly applies to the liquid state only. The minimum density is also arbitrary, but is reasonable for technical applications to limit iterations in non-linear systems. The limits in enthalpy and entropy are used as safeguards in inverse iterations.

Extends from Modelica.Icons.Record (Icon for records).

Fields

Type	Name	Description
`Temperature`	`TMIN`	Minimum temperature
`Temperature`	`TMAX`	Maximum temperature
`Density`	`DMIN`	Minimum density
`Density`	`DMAX`	Maximum density
`AbsolutePressure`	`PMIN`	Minimum pressure
`AbsolutePressure`	`PMAX`	Maximum pressure
`SpecificEnthalpy`	`HMIN`	Minimum enthalpy
`SpecificEnthalpy`	`HMAX`	Maximum enthalpy
`SpecificEntropy`	`SMIN`	Minimum entropy
`SpecificEntropy`	`SMAX`	Maximum entropy

Type Modelica.Media.R134a.R134a_ph.FixedPhase
Phase of the fluid: 1 for 1-phase, 2 for two-phase, 0 for not known, e.g., interactive use

Extends from Integer.

Attributes

Name	Value
`min`	`0`
`max`	`2`
`start`	`0`

Record Modelica.Media.R134a.R134a_ph.FluidConstants
Extended fluid constants

Information

This icon is indicates a record.

Extends from Modelica.Media.Interfaces.Types.TwoPhase.FluidConstants (Extended fluid constants).

Fields

Type	Name	Description
`String`	`iupacName`	Complete IUPAC name (or common name, if non-existent)
`String`	`casRegistryNumber`	Chemical abstracts sequencing number (if it exists)
`String`	`chemicalFormula`	Chemical formula, (brutto, nomenclature according to Hill
`String`	`structureFormula`	Chemical structure formula
`MolarMass`	`molarMass`	Molar mass
`Temperature`	`criticalTemperature`	Critical temperature
`AbsolutePressure`	`criticalPressure`	Critical pressure
`MolarVolume`	`criticalMolarVolume`	Critical molar Volume
`Real`	`acentricFactor`	Pitzer acentric factor
`Temperature`	`triplePointTemperature`	Triple point temperature
`AbsolutePressure`	`triplePointPressure`	Triple point pressure
`Temperature`	`meltingPoint`	Melting point at 101325 Pa
`Temperature`	`normalBoilingPoint`	Normal boiling point (at 101325 Pa)
`DipoleMoment`	`dipoleMoment`	Dipole moment of molecule in Debye (1 debye = 3.33564e10-30 C.m)
`Boolean`	`hasIdealGasHeatCapacity`	True if ideal gas heat capacity is available
`Boolean`	`hasCriticalData`	True if critical data are known
`Boolean`	`hasDipoleMoment`	True if a dipole moment known
`Boolean`	`hasFundamentalEquation`	True if a fundamental equation
`Boolean`	`hasLiquidHeatCapacity`	True if liquid heat capacity is available
`Boolean`	`hasSolidHeatCapacity`	True if solid heat capacity is available
`Boolean`	`hasAccurateViscosityData`	True if accurate data for a viscosity function is available
`Boolean`	`hasAccurateConductivityData`	True if accurate data for thermal conductivity is available
`Boolean`	`hasVapourPressureCurve`	True if vapour pressure data, e.g., Antoine coefficients are known
`Boolean`	`hasAcentricFactor`	True if Pitzer acentric factor is known
`SpecificEnthalpy`	`HCRIT0`	Critical specific enthalpy of the fundamental equation
`SpecificEntropy`	`SCRIT0`	Critical specific entropy of the fundamental equation
`SpecificEnthalpy`	`deltah`	Difference between specific enthalpy model (h_m) and f.eq. (h_f) (h_m - h_f)
`SpecificEntropy`	`deltas`	Difference between specific enthalpy model (s_m) and f.eq. (s_f) (s_m - s_f)

Record Modelica.Media.R134a.R134a_ph.ThermodynamicState
Thermodynamic state

Information

This icon is indicates a record.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.ThermodynamicState (Thermodynamic state of two phase medium).

Fields

Type	Name	Description
`FixedPhase`	`phase`	Phase of the fluid: 1 for 1-phase, 2 for two-phase, 0 for not known, e.g., interactive use
`SpecificEnthalpy`	`h`	Specific enthalpy
`Density`	`d`	Density
`Temperature`	`T`	Temperature
`AbsolutePressure`	`p`	Pressure

Model Modelica.Media.R134a.R134a_ph.BaseProperties
Base properties of R134a

Information

Model BaseProperties is a model within package PartialMedium and contains the declarations of the minimum number of variables that every medium model is supposed to support. A specific medium inherits from model BaseProperties and provides the equations for the basic properties.

The BaseProperties model contains the following 7+nXi variables (nXi is the number of independent mass fractions defined in package PartialMedium):

Variable	Unit	Description
T	K	temperature
p	Pa	absolute pressure
d	kg/m3	density
h	J/kg	specific enthalpy
u	J/kg	specific internal energy
Xi[nXi]	kg/kg	independent mass fractions m_i/m
R	J/kg.K	gas constant
M	kg/mol	molar mass

In order to implement an actual medium model, one can extend from this base model and add 5 equations that provide relations among these variables. Equations will also have to be added in order to set all the variables within the ThermodynamicState record state.

If standardOrderComponents=true, the full composition vector X[nX] is determined by the equations contained in this base class, depending on the independent mass fraction vector Xi[nXi].

Additional 2 + nXi equations will have to be provided when using the BaseProperties model, in order to fully specify the thermodynamic conditions. The input connector qualifier applied to p, h, and nXi indirectly declares the number of missing equations, permitting advanced equation balance checking by Modelica tools. Please note that this doesn't mean that the additional equations should be connection equations, nor that exactly those variables should be supplied, in order to complete the model. For further information, see the Modelica.Media User's guide, and Section 4.7 (Balanced Models) of the Modelica 3.0 specification.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.BaseProperties (Base properties (p, d, T, h, u, R, MM, sat) of two phase medium).

Parameters

Type	Name	Default	Description
`Boolean`	`preferredMediumStates`	`false`	= true if StateSelect.prefer shall be used for the independent property variables of the medium
`final` `Boolean`	`standardOrderComponents`	`true`	If true, and reducedX = true, the last element of X will be computed from the other ones

Connectors

Type	Name	Description
`input` `InputAbsolutePressure`	`p`	Absolute pressure of medium
`input` `InputMassFraction`	`Xi[nXi]`	Structurally independent mass fractions
`input` `InputSpecificEnthalpy`	`h`	Specific enthalpy of medium

Function Modelica.Media.R134a.R134a_ph.setState_pTX
Set state for pressure and temperature (X not used since single substance)

Information

This function should be used by default in order to calculate the thermodynamic state record used as input by many functions.

Example:

     parameter Medium.AbsolutePressure p = 3e5;
     parameter Medium.Temperature T = 290;

     Medium.Density rho;

     equation

     rho = Medium.density(setState_pTX(p, T, fill(0, Medium.nX)));

Please note, that in contrast to setState_phX, setState_dTX and setState_psX this function can not calculate properties in the two-phase region since pressure and temperature are dependent variables. A guard function will be called if the temperature difference to the phase boundary is lower than 1K or the pressure difference to the critical pressure is lower than 1000 Pa.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.setState_pTX (Return thermodynamic state as function of p, T and composition X or Xi).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.setState_phX
Set state for pressure and specific enthalpy (X not used since single substance)

Information

This function should be used by default in order to calculate the thermodynamic state record used as input by many functions.

Example:

     parameter Medium.AbsolutePressure p = 3e5;
     parameter Medium.SpecificEnthalpy h = 4.2e5;

     Medium.Density rho;

     equation

     rho = Medium.density(setState_phX(p, h, fill(0, Medium.nX)));

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.setState_phX (Return thermodynamic state as function of p, h and composition X or Xi).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.setState_psX
Set state for pressure and specific entropy (X not used since single substance)

Information

This function may be used in order to calculate the thermodynamic state record used as input by many functions. It will calculate the missing states:

density
pressure
specific enthalpy

Example:

     parameter Medium.AbsolutePressure p = 3e5;
     parameter Medium.SpecficEntropy s = 1.7e3;

     Medium.SpecficEnthalpy h;

     equation

     h = Medium.specificEnthalpy(setState_psX(p, s, fill(0, Medium.nX)));

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.setState_psX (Return thermodynamic state as function of p, s and composition X or Xi).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.setState_dTX
Set state for density and temperature (X not used since single substance)

Information

Although the medium package is explicit for pressure and specific enthalpy, this function may be used in order to calculate the thermodynamic state record used as input by many functions. It will calculate the missing states:

pressure
specific enthalpy

Example:

     parameter Medium.Density d = 4;
     parameter Medium.Temperature T = 298;

     Medium.SpecficEntropy s;

     equation

     s = Medium.specificEntropy(setState_dTX(d, T, fill(0, Medium.nX)));

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.setState_dTX (Return thermodynamic state as function of d, T and composition X or Xi).

Inputs

Type	Name	Description
`Density`	`d`	Density
`Temperature`	`T`	Temperature
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.setSmoothState
Smooth transition function between state_a and state_b

Information

This function is used to approximate the equation

    state = if x > 0 then state_a else state_b;

by a smooth characteristic, so that the expression is continuous and differentiable:

   state := smooth(1, if x >  x_small then state_a else
                      if x < -x_small then state_b else f(state_a, state_b));

This is performed by applying function Media.Common.smoothStep(..) on every element of the thermodynamic state record.

If mass fractions X[:] are approximated with this function then this can be performed for all nX mass fractions, instead of applying it for nX-1 mass fractions and computing the last one by the mass fraction constraint sum(X)=1. The reason is that the approximating function has the property that sum(state.X) = 1, provided sum(state_a.X) = sum(state_b.X) = 1. This can be shown by evaluating the approximating function in the abs(x) < x_small region (otherwise state.X is either state_a.X or state_b.X):

    X[1]  = smoothStep(x, X_a[1] , X_b[1] , x_small);
    X[2]  = smoothStep(x, X_a[2] , X_b[2] , x_small);
       ...
    X[nX] = smoothStep(x, X_a[nX], X_b[nX], x_small);

    X[1]  = c*(X_a[1]  - X_b[1])  + (X_a[1]  + X_b[1])/2
    X[2]  = c*(X_a[2]  - X_b[2])  + (X_a[2]  + X_b[2])/2;
       ...
    X[nX] = c*(X_a[nX] - X_b[nX]) + (X_a[nX] + X_b[nX])/2;
    c     = (x/x_small)*((x/x_small)^2 - 3)/4

Summing all mass fractions together results in

    sum(X) = c*(sum(X_a) - sum(X_b)) + (sum(X_a) + sum(X_b))/2
           = c*(1 - 1) + (1 + 1)/2
           = 1

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.setSmoothState (Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b).

Inputs

Type	Name	Description
`Real`	`x`	m_flow or dp
`ThermodynamicState`	`state_a`	Thermodynamic state if x > 0
`ThermodynamicState`	`state_b`	Thermodynamic state if x < 0
`Real`	`x_small`	Smooth transition in the region -x_small < x < x_small

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Smooth thermodynamic state for all x (continuous and differentiable)

Function Modelica.Media.R134a.R134a_ph.dynamicViscosity
Dynamic viscosity w.r.t. temperature and density | use setState_phX function for input

Information

This function calculates the dynamic viscosity of R134a from the state record (e.g., use setState_phX function for input). The dynamic viscosity is modelled by the corresponding states method of Klein, McLinden and Laesecke (1997).

Restrictions

This property is only defined in one-phase region.

References

Klein, McLinden and Laesecke:: An improved extended corresponding states method for estimation of viscosity of pure refrigerants and mixtures. Int. J. Refrig., Vol. 20, No.3, pp. 208-217, 1997.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.dynamicViscosity (Return dynamic viscosity).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`DynamicViscosity`	`eta`	Dynamic viscosity

Function Modelica.Media.R134a.R134a_ph.thermalConductivity
Thermal conductivity w.r.t. thermodynamic state | use setState_phX function for input

Information

This function calculates the thermal conductivity of R134a from the state record (e.g., use setState_phX function for input). The thermal conductivity is modelled by the corresponding states model of McLinden, Klein. and Perkins (2000).

Restrictions

This property is only defined in one-phase region.

References

McLinden, Klein. and Perkins:: An extended corresponding states model for the thermal conductivity of refrigerants and refrigerant mixtures. Int. J. Refrig., 23 (2000) 43-63.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.thermalConductivity (Return thermal conductivity).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`ThermalConductivity`	`lambda`	Thermal conductivity

Function Modelica.Media.R134a.R134a_ph.prandtlNumber
Return the Prandtl number

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`PrandtlNumber`	`Pr`	Prandtl number

Function Modelica.Media.R134a.R134a_ph.pressure
Pressure w.r.t. thermodynamic state

Information

This function is included for the sake of completeness.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.pressure (Return pressure).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure

Function Modelica.Media.R134a.R134a_ph.temperature
Temperature as function of pressure and specific enthalpy | use setState_phX function for input

Information

This function calculates the Kelvin temperature of R134a from the state record (e.g., use setState_phX function for input). The temperature is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.temperature (Return temperature).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`Temperature`	`T`	Temperature

Function Modelica.Media.R134a.R134a_ph.density
Density as function of pressure and specific enthalpy | use setState_phX function for input

Information

This function calculates the density of R134a from the state record (e.g., use setState_phX function for input). The density is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.density (Return density).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.specificEnthalpy
Specific enthalpy w.r.t. thermodynamic state | use setState_phX function for input

Information

This function is included for the sake of completeness.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.specificEnthalpy (Return specific enthalpy).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h`	Specific enthalpy

Function Modelica.Media.R134a.R134a_ph.specificInternalEnergy
Specific internal energy w.r.t. thermodynamic state

Information

This function calculates the specific internal energy of R134a from the state record (e.g., use setState_phX function for input). The specific internal energy is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.specificInternalEnergy (Return specific internal energy).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificEnergy`	`u`	Specific internal energy

Function Modelica.Media.R134a.R134a_ph.specificEntropy
Specific entropy w.r.t. thermodynamic state | use setState_phX function for input if necessary

Information

This function calculates the specific entropy of R134a from the state record (e.g., use setState_phX function for input). The specific entropy is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.specificEntropy (Return specific entropy).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificEntropy`	`s`	Specific entropy

Function Modelica.Media.R134a.R134a_ph.specificGibbsEnergy
Specific gibbs energy w.r.t. thermodynamic state

Information

This function calculates the specific Gibbs energy of R134a from the state record (e.g., use setState_phX function for input). The isentropic exponent is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.specificGibbsEnergy (Return specific Gibbs energy).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificEnergy`	`g`	Specific Gibbs energy

Function Modelica.Media.R134a.R134a_ph.specificHelmholtzEnergy
Helmholtz energy w.r.t. thermodynamic state

Information

This function calculates the specific Helmholtz energy of R134a from the state record (e.g., use setState_phX function for input). The Helmholtz energy is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.specificHelmholtzEnergy (Return specific Helmholtz energy).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificEnergy`	`f`	Specific Helmholtz energy

Function Modelica.Media.R134a.R134a_ph.specificHeatCapacityCp
Specific heat capacity at constant pressure | turns infinite in two-phase region! | use setState_phX function for input

Information

This function calculates the specific heat capacity of R134a at constant pressure from the state record (e.g., use setState_phX function for input). The specific heat capacity is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Restrictions

This property is only defined in one-phase region.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.specificHeatCapacityCp (Return specific heat capacity at constant pressure).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificHeatCapacity`	`cp`	Specific heat capacity at constant pressure

Function Modelica.Media.R134a.R134a_ph.heatCapacity_cp
Alias for deprecated name

Information

Restrictions

This property is only defined in one-phase region.

Extends from Modelica.Media.R134a.R134a_ph.specificHeatCapacityCp (Specific heat capacity at constant pressure | turns infinite in two-phase region! | use setState_phX function for input).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificHeatCapacity`	`cp`	Specific heat capacity at constant pressure

Function Modelica.Media.R134a.R134a_ph.specificHeatCapacityCv
Specific heat capacity at constant volume | use setState_phX function for input

Information

This function calculates the specific heat capacity of R134a at constant volume from the state record (e.g., use setState_phX function for input). The specific heat capacity is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Please note, that the function can also be called in the two-phase region, but the output is not continuous for a phase transition (see Tillner-Roth and Baehr, 1994). Values in two-phase region are considerably higher than in one-phase domain. The following figure just shows one-phase properties.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.specificHeatCapacityCv (Return specific heat capacity at constant volume).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificHeatCapacity`	`cv`	Specific heat capacity at constant volume

Function Modelica.Media.R134a.R134a_ph.heatCapacity_cv
Alias for deprecated name

Information

Extends from Modelica.Media.R134a.R134a_ph.specificHeatCapacityCv (Specific heat capacity at constant volume | use setState_phX function for input).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`SpecificHeatCapacity`	`cv`	Specific heat capacity at constant volume

Function Modelica.Media.R134a.R134a_ph.isentropicExponent
Isentropic exponent gamma w.r.t. thermodynamic state | not defined in two-phase region | use setState_phX function for input

Information

This function calculates the isentropic exponent of R134a from the state record (e.g., use setState_phX function for input). The isentropic exponent is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Restrictions

This property is only defined in one-phase region.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.isentropicExponent (Return isentropic exponent).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`IsentropicExponent`	`gamma`	Isentropic exponent

Function Modelica.Media.R134a.R134a_ph.isentropicEnthalpy
Isentropic enthalpy of downstream pressure and upstream thermodynamic state (specific entropy)

Information

This function calculates the specific enthalpy of R134a for an isentropic pressure change from refState.p to p_downstream (e.g., use setState_phX function for input of refState).

The function can be used for instance to calculate an isentropic efficiency of a compressor or calculate the power consumption (obtained from the isentropic enthalpy) for a given efficiency.

Example:

     Medium.AbsolutePressure p_downstream=10e5;
     Medium.SpecificEnthalpy h_downstream=4.1e5;
     Medium.AbsolutePressure p_upstream=3e5;
     Medium.SpecificEnthalpy h_upstream=4.0e5;

     // Isentropic efficiency of a compressor:
     Real eta_is;

    equation

     h_is = isentropicEnthalpy(p_downstream, Medium.setState_phX(p_upstream, h_upstream));

     eta_is = (h_is-h_upstream)/(h_downstream - h_upstream);

Restrictions

The isentropic efficiency function should not be applied in liquid region.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.isentropicEnthalpy (Return isentropic enthalpy).

Inputs

Type	Name	Description
`AbsolutePressure`	`p_downstream`	Downstream pressure
`ThermodynamicState`	`refState`	Reference state for entropy

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h_is`	Isentropic enthalpy

Function Modelica.Media.R134a.R134a_ph.velocityOfSound
Velocity of sound w.r.t. thermodynamic state (only valid for one-phase)

Information

This function calculates the velocity of sound of R134a from the state record (e.g., use setState_phX function for input). The velocity of sound is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Restrictions

This property is only defined in one-phase region.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.velocityOfSound (Return velocity of sound).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`VelocityOfSound`	`a`	Velocity of sound

Function Modelica.Media.R134a.R134a_ph.isobaricExpansionCoefficient
Isobaric expansion coefficient w.r.t. thermodynamic state (only valid for one-phase)

Information

This function calculates the isobaric expansion coefficient of R134a from the state record (e.g., use setState_phX function for input). The isobaric expansion coefficient is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Restrictions

This property is only defined in one-phase region.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.isobaricExpansionCoefficient (Return overall the isobaric expansion coefficient beta).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`IsobaricExpansionCoefficient`	`beta`	Isobaric expansion coefficient

Function Modelica.Media.R134a.R134a_ph.beta
Alias for isobaricExpansionCoefficient for user convenience

Information

Restrictions

This property is only defined in one-phase region.

Extends from Modelica.Media.R134a.R134a_ph.isobaricExpansionCoefficient (Isobaric expansion coefficient w.r.t. thermodynamic state (only valid for one-phase)).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`IsobaricExpansionCoefficient`	`beta`	Isobaric expansion coefficient

Function Modelica.Media.R134a.R134a_ph.isothermalCompressibility
Isothermal compressibility w.r.t. thermodynamic state (only valid for one-phase)

Information

This function calculates the isothermal compressibility of R134a from the state record (e.g., use setState_phX function for input). The isothermal compressibility is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Restrictions

This property is only defined in one-phase region.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.isothermalCompressibility (Return overall the isothermal compressibility factor).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`IsothermalCompressibility`	`kappa`	Isothermal compressibility

Function Modelica.Media.R134a.R134a_ph.kappa
Alias of isothermalCompressibility for user convenience

Information

Restrictions

This property is only defined in one-phase region.

Extends from Modelica.Media.R134a.R134a_ph.isothermalCompressibility (Isothermal compressibility w.r.t. thermodynamic state (only valid for one-phase)).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`IsothermalCompressibility`	`kappa`	Isothermal compressibility

Function Modelica.Media.R134a.R134a_ph.density_derp_h
Density derivative by pressure | use setState_phX function for input

Information

This function calculates the density derivative w.r.t. absolute pressure at constant specific enthalpy of R134a (e.g., use setState_phX function for input). The derivative is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994). It can be used for manual state transformations (e.g. from density to pressure).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.density_derp_h (Return density derivative w.r.t. pressure at const specific enthalpy).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`DerDensityByPressure`	`ddph`	Density derivative w.r.t. pressure

Function Modelica.Media.R134a.R134a_ph.density_derh_p
Density derivative by specific enthalpy | use setState_phX function for input

Information

This function calculates the density derivative w.r.t. specific enthalpy at constant pressure of R134a (e.g., use setState_phX function for input). The derivative is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994). It can be used for manual state transformations (e.g. from density to specific enthalpy).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.density_derh_p (Return density derivative w.r.t. specific enthalpy at constant pressure).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`DerDensityByEnthalpy`	`ddhp`	Density derivative w.r.t. specific enthalpy

Partial Function Modelica.Media.R134a.R134a_ph.density_derp_T
Return density derivative w.r.t. pressure at const temperature

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`DerDensityByPressure`	`ddpT`	Density derivative w.r.t. pressure

Partial Function Modelica.Media.R134a.R134a_ph.density_derT_p
Return density derivative w.r.t. temperature at constant pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`DerDensityByTemperature`	`ddTp`	Density derivative w.r.t. temperature

Partial Function Modelica.Media.R134a.R134a_ph.density_derX
Return density derivative w.r.t. mass fraction

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`Density`	`dddX[nX]`	Derivative of density w.r.t. mass fraction

Function Modelica.Media.R134a.R134a_ph.molarMass
Return the molar mass of the medium

Information

This icon indicates Modelica functions.

Extends from Modelica.Media.Interfaces.PartialPureSubstance.molarMass (Return the molar mass of the medium).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`MolarMass`	`MM`	Mixture molar mass

Function Modelica.Media.R134a.R134a_ph.specificEnthalpy_pTX
Return specific enthalpy from pressure, temperature and mass fraction

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h`	Specific enthalpy at p, T, X

Function Modelica.Media.R134a.R134a_ph.specificEntropy_pTX
Return specific enthalpy from p, T, and X or Xi

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`MassFraction`	`X[:]`	Mass fractions

Outputs

Type	Name	Description
`SpecificEntropy`	`s`	Specific entropy

Function Modelica.Media.R134a.R134a_ph.density_pTX
Return density from p, T, and X or Xi

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`MassFraction`	`X[:]`	Mass fractions

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.temperature_phX
Return temperature from p, h, and X or Xi

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Temperature`	`T`	Temperature

Function Modelica.Media.R134a.R134a_ph.density_phX
Return density from p, h, and X or Xi

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.temperature_psX
Return temperature from p, s, and X or Xi

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Temperature`	`T`	Temperature

Function Modelica.Media.R134a.R134a_ph.density_psX
Return density from p, s, and X or Xi

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.specificEnthalpy_psX
Return specific enthalpy from p, s, and X or Xi

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`MassFraction`	`X[:]`	Mass fractions
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h`	Specific enthalpy

Type Modelica.Media.R134a.R134a_ph.MassFlowRate
Type for mass flow rate with medium specific attributes

Extends from Modelica.SIunits.MassFlowRate.

Attributes

Name	Value
`quantity`	`"MassFlowRate." + mediumName`
`unit`	`"kg/s"`
`min`	`-100000`
`max`	`100000`
`start`	`0.`

Function Modelica.Media.R134a.R134a_ph.setState_pT
Return thermodynamic state from p and T

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.setState_ph
Return thermodynamic state from p and h

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.setState_ps
Return thermodynamic state from p and s

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.setState_dT
Return thermodynamic state from d and T

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Density`	`d`	Density
`Temperature`	`T`	Temperature
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.density_ph
Density as function of pressure and specific enthalpy

Information

This function calculates the density of R134a from the state variables p (absolute pressure) and h (specific enthalpy). The density is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`Integer`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.temperature_ph
Temperature as function of pressure and specific enthalpy

Information

This function calculates the Kelvin temperature of R134a from the state variables p (absolute pressure) and h (specific enthalpy). The temperature is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`Integer`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Temperature`	`T`	Temperature

Function Modelica.Media.R134a.R134a_ph.pressure_dT
Return pressure from d and T

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Density`	`d`	Density
`Temperature`	`T`	Temperature
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure

Function Modelica.Media.R134a.R134a_ph.specificEnthalpy_dT
Return specific enthalpy from d and T

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Density`	`d`	Density
`Temperature`	`T`	Temperature
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h`	Specific enthalpy

Function Modelica.Media.R134a.R134a_ph.specificEnthalpy_ps
Return specific enthalpy from p and s

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h`	Specific enthalpy

Function Modelica.Media.R134a.R134a_ph.temperature_ps
Return temperature from p and s

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Temperature`	`T`	Temperature

Function Modelica.Media.R134a.R134a_ph.density_ps
Return density from p and s

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.specificEnthalpy_pT
Return specific enthalpy from p and T

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h`	Specific enthalpy

Function Modelica.Media.R134a.R134a_ph.density_pT
Return density from p and T

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`FixedPhase`	`phase`	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.setDewState
Return the thermodynamic state on the dew line

Information

This function shall be used in order to calculate the thermodynamic state record for the vapor phase boundary. It requires the saturation record as input which can be determined by both functions setSat_p and setSat_T:

Example:

    Medium.AbsolutePressure p=3e5;
    // Viscosity on the vapor phase boundary
    Modelica.SIunits.DynamicViscosity eta_vap;

    equation

    eta_vap = Medium.DynamicViscosity(Medium.setBubbleState(Medium.setSat_p(p)));

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.setDewState (Return the thermodynamic state on the dew line).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation point
`FixedPhase`	`phase`	Phase: default is one phase

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Complete thermodynamic state info

Function Modelica.Media.R134a.R134a_ph.setBubbleState
Return the thermodynamic state on the bubble line

Information

This function shall be used in order to calculate the thermodynamic state record for the liquid phase boundary. It requires the saturation record as input which can be determined by both functions setSat_p and setSat_T:

Example:

    Medium.AbsolutePressure p=3e5;
    // Viscosity on the liquid phase boundary
    Modelica.SIunits.DynamicViscosity eta_liq;

    equation

    eta_liq = Medium.DynamicViscosity(Medium.setBubbleState(Medium.setSat_p(p)));

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.setBubbleState (Return the thermodynamic state on the bubble line).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation point
`FixedPhase`	`phase`	Phase: default is one phase

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Complete thermodynamic state info

Function Modelica.Media.R134a.R134a_ph.setSat_T
Return saturation property record from temperature

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Temperature`	`T`	Temperature

Outputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Function Modelica.Media.R134a.R134a_ph.setSat_p
Return saturation property record from pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure

Outputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Function Modelica.Media.R134a.R134a_ph.bubbleEnthalpy
Specific enthalpy of liquid phase w.r.t saturation pressure | use setSat_p function for input

Information

This function calculates the liquid phase enthalpy of R134a from the state variable p (absolute pressure). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.bubbleEnthalpy (Return bubble point specific enthalpy).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`SpecificEnthalpy`	`hl`	Boiling curve specific enthalpy

Function Modelica.Media.R134a.R134a_ph.dewEnthalpy
Specific enthalpy of vapor phase w.r.t saturation pressure | use setSat_p function for input

Information

This function calculates the vapor phase enthalpy of R134a from the state variable p (absolute pressure). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.dewEnthalpy (Return dew point specific enthalpy).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`SpecificEnthalpy`	`hv`	Dew curve specific enthalpy

Function Modelica.Media.R134a.R134a_ph.bubbleEntropy
Specific entropy of liquid phase w.r.t saturation pressure | use setSat_p function for input

Information

This function calculates the liquid phase entropy of R134a from the state variable p (absolute pressure). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.bubbleEntropy (Return bubble point specific entropy).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`SpecificEntropy`	`sl`	Boiling curve specific entropy

Function Modelica.Media.R134a.R134a_ph.dewEntropy
Specific entropy of vapor phase w.r.t saturation pressure | use setSat_p function for input

Information

This function calculates the vapor phase entropy of R134a from the state variable p (absolute pressure). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.dewEntropy (Return dew point specific entropy).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`SpecificEntropy`	`sv`	Dew curve specific entropy

Function Modelica.Media.R134a.R134a_ph.bubbleDensity
Density of liquid phase w.r.t saturation pressure | use setSat_p function for input

Information

This function calculates the liquid phase density of R134a from the state variable p (absolute pressure). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.bubbleDensity (Return bubble point density).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`Density`	`dl`	Boiling curve density

Function Modelica.Media.R134a.R134a_ph.dewDensity
Density of vapor phase w.r.t saturation pressure | use setSat_p function for input

Information

This function calculates the vapor phase density of R134a from the state variable p (absolute pressure). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.dewDensity (Return dew point density).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`Density`	`dv`	Dew curve density

Function Modelica.Media.R134a.R134a_ph.saturationPressure
Saturation pressure w.r.t. temperature

Information

This function calculates the saturation pressure of R134a from the state variable T (temperature). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.saturationPressure (Return saturation pressure).

Inputs

Type	Name	Description
`Temperature`	`T`	Temperature

Outputs

Type	Name	Description
`AbsolutePressure`	`p`	Saturation pressure

Function Modelica.Media.R134a.R134a_ph.saturationTemperature
Saturation temperature in two-phase region

Information

This function calculates the saturation temperature of R134a from the state variable p (absolute pressure). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.saturationTemperature (Return saturation temperature).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure

Outputs

Type	Name	Description
`Temperature`	`T`	Saturation temperature

Function Modelica.Media.R134a.R134a_ph.saturationPressure_sat
Return saturation temperature

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`AbsolutePressure`	`p`	Saturation pressure

Function Modelica.Media.R134a.R134a_ph.saturationTemperature_sat
Return saturation temperature

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`Temperature`	`T`	Saturation temperature

Function Modelica.Media.R134a.R134a_ph.saturationTemperature_derp
Derivative of saturation temperature in two-phase region

Information

This function calculates the derivative of saturation temperature of R134a with regard to the state variable p (absolute pressure). The non-derivative function is saturatuionTemperature.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.saturationTemperature_derp (Return derivative of saturation temperature w.r.t. pressure).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure

Outputs

Type	Name	Description
`DerTemperatureByPressure`	`dTp`	Derivative of saturation temperature w.r.t. pressure

Function Modelica.Media.R134a.R134a_ph.saturationTemperature_derp_sat
Return derivative of saturation temperature w.r.t. pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`DerTemperatureByPressure`	`dTp`	Derivative of saturation temperature w.r.t. pressure

Function Modelica.Media.R134a.R134a_ph.surfaceTension
Surface tension as a function of temperature (below critical point)

Information

This function calculates the surface tension of R134a from the saturation record (e.g., use setSat_T function for input). The property is modelled by an approach of Okada and Higashi (1994).

Restrictions

This property is only defined in two-phase region.

References

Okada and Higashi:: Surface tension correlation of HFC-134a and HCFC-123. Proceedings of the Joint Meeting of IIR Commissions B1, B2, E1, and E2, Padua, Italy, pp. 541-548, 1994.

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.surfaceTension (Return surface tension sigma in the two phase region).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`SurfaceTension`	`sigma`	Surface tension sigma in the two phase region

Function Modelica.Media.R134a.R134a_ph.dBubbleDensity_dPressure
Derivative of liquid density in two-phase region w.r.t pressure

Information

This function calculates the derivative of liquid density of R134a in the two-phase region with regard to the state variable p (absolute pressure). The non-derivative function is bubbleDensity.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.dBubbleDensity_dPressure (Return bubble point density derivative).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`DerDensityByPressure`	`ddldp`	Boiling curve density derivative

Function Modelica.Media.R134a.R134a_ph.dDewDensity_dPressure
Derivative of vapor density in two-phase region w.r.t pressure

Information

This function calculates the derivative of vapor density of R134a in two-phase region with regard to the state variable p (absolute pressure). The non-derivative function is dewDensity.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.dDewDensity_dPressure (Return dew point density derivative).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`DerDensityByPressure`	`ddvdp`	Saturated steam density derivative

Function Modelica.Media.R134a.R134a_ph.dBubbleEnthalpy_dPressure
Derivative of liquid specific enthalpy in two-phase region w.r.t pressure

Information

This function calculates the derivative of liquid enthalpy of R134a with regard to the state variable p (absolute pressure). The non-derivative function is bubbleEnthalpy.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.dBubbleEnthalpy_dPressure (Return bubble point specific enthalpy derivative).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`DerEnthalpyByPressure`	`dhldp`	Boiling curve specific enthalpy derivative

Function Modelica.Media.R134a.R134a_ph.dDewEnthalpy_dPressure
Derivative of vapor specific enthalpy in two-phase region w.r.t pressure

Information

This function calculates the derivative of vapor enthalpy of R134a in the two-phase region with regard to the state variable p (absolute pressure). The non-derivative function is dewEnthalpy.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Media.Interfaces.PartialTwoPhaseMedium.dDewEnthalpy_dPressure (Return dew point specific enthalpy derivative).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation property record

Outputs

Type	Name	Description
`DerEnthalpyByPressure`	`dhvdp`	Saturated steam specific enthalpy derivative

Function Modelica.Media.R134a.R134a_ph.setState_px
Return thermodynamic state from pressure and vapour quality

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`MassFraction`	`x`	Vapour quality

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.setState_Tx
Return thermodynamic state from temperature and vapour quality

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Temperature`	`T`	Temperature
`MassFraction`	`x`	Vapour quality

Outputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Function Modelica.Media.R134a.R134a_ph.vapourQuality
Return vapour quality

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`ThermodynamicState`	`state`	Thermodynamic state record

Outputs

Type	Name	Description
`MassFraction`	`x`	Vapour quality

Function Modelica.Media.R134a.R134a_ph.saturationTemperature_der_p
Time derivative of saturation temperature in two-phase region

Information

This function calculates the time derivative of saturation temperature of R134a with regard to the time derivative of p. The non-derivative function is saturatuionTemperature.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`Real`	`der_p`	Time derivative of pressure

Outputs

Type	Name	Description
`Real`	`der_Tsat`	Time derivative of saturation temperature

Function Modelica.Media.R134a.R134a_ph.dBubbleDensity_dPressure_der_sat
Time derivative of liquid density in two-phase region w.r.t pressure

Information

This function calculates the time derivative of liquid density of R134a with regard to the time derivative of p. The non-derivative function is bubbleDensity.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation properties \| pressure is used for interpolation
`SaturationProperties`	`der_sat`	Derivative of saturation properties

Outputs

Type	Name	Description
`Real`	`der_ddldp`	Time derivative of liquid density in two-phase region w.r.t pressure

Function Modelica.Media.R134a.R134a_ph.dDewDensity_dPressure_der_sat
Time derivative of vapor density in two-phase region w.r.t pressure

Information

This function calculates the time derivative of vapor density of R134a with regard to the time derivative of p. The non-derivative function is dewDensity.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation properties \| pressure is used for interpolation
`SaturationProperties`	`der_sat`	Derivative of saturation properties

Outputs

Type	Name	Description
`Real`	`der_ddvdp`	Time derivative of vapor density in two-phase region w.r.t pressure

Function Modelica.Media.R134a.R134a_ph.dBubbleEnthalpy_dPressure_der_sat
Time derivative of liquid specific enthalpy in two-phase region w.r.t pressure

Information

This function calculates the time derivative of liquid specific enthalpy of R134a with regard to the time derivative of p. The non-derivative function is bubbleEnthalpy.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation properties \| pressure is used for interpolation
`SaturationProperties`	`der_sat`	Derivative of saturation properties

Outputs

Type	Name	Description
`Real`	`der_dhldp`	Time derivative of liquid specific enthalpy in two-phase region w.r.t pressure

Function Modelica.Media.R134a.R134a_ph.dDewEnthalpy_dPressure_der_sat
Time derivative of vapor specific enthalpy in two-phase region w.r.t pressure

Information

This function calculates the time derivative of vapor enthalpy of R134a with regard to the time derivative of p. The non-derivative function is dewEnthalpy.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation properties \| pressure is used for interpolation
`SaturationProperties`	`der_sat`	Derivative of saturation properties

Outputs

Type	Name	Description
`Real`	`der_dhvdp`	Derivative of vapor specific enthalpy in two-phase region w.r.t pressure

Function Modelica.Media.R134a.R134a_ph.dDewEntropy_dPressure
Derivative of vapor specific entropy in two-phase region w.r.t pressure | use setState_phX function for input

Information

This function calculates the derivative of vapor entropy of R134a with regard to the state variable p (absolute pressure). The non-derivative function is dewEntropy.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation properties \| pressure is used for interpolation

Outputs

Type	Name	Description
`Real`	`dsvdp`	Derivative of vapor specific entropy in two-phase region w.r.t pressure

Function Modelica.Media.R134a.R134a_ph.dDewEntropy_dPressure_der_sat
Time derivative of vapor specific entropy in two-phase region w.r.t pressure | use setState_phX function for input

Information

This function calculates the time derivative of vapor specific entropy of R134a with regard to the time derivative of p. The non-derivative function is dewEntropy.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation properties \| pressure is used for interpolation
`SaturationProperties`	`der_sat`	Derivative of saturation properties

Outputs

Type	Name	Description
`Real`	`der_dsvdp`	Derivative of vapor specific entropy in two-phase region w.r.t pressure

Function Modelica.Media.R134a.R134a_ph.dBubbleEntropy_dPressure
Derivative of liquid specific entropy in two-phase region w.r.t pressure | use setState_phX function for input

Information

This function calculates the derivative of liquid entropy of R134a with regard to the state variable p (absolute pressure). The non-derivative function is bubbleEntropy.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation properties \| pressure is used for interpolation

Outputs

Type	Name	Description
`Real`	`dsldp`	Derivative of liquid specific entropy in two-phase region w.r.t pressure

Function Modelica.Media.R134a.R134a_ph.dBubbleEntropy_dPressure_der_sat
Time derivative of liquid specific entropy in two-phase region w.r.t pressure | use setState_phX function for input

Information

This function calculates the time derivative of liquid specific entropy of R134a with regard to the time derivative of p. The non-derivative function is bubbleEntropy.

Restrictions

It is only valid in the two-phase region (i.e., p_triple ≤ p ≤ p_crit ).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`SaturationProperties`	`sat`	Saturation properties \| pressure is used for interpolation
`SaturationProperties`	`der_sat`	Derivative of saturation properties

Outputs

Type	Name	Description
`Real`	`der_dsldp`	Derivative of liquid specific entropy in two-phase region w.r.t pressure

Function Modelica.Media.R134a.R134a_ph.derivsOf_ph
Derivatives required for inversion of temperature and density functions

Information

This function calculates the derivatives required for an inversion of temperature and density function.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`Integer`	`phase`	Number of phases

Outputs

Type	Name	Description
`InverseDerivatives_rhoT`	`derivs`	Inverse derivatives for density and temperature

Function Modelica.Media.R134a.R134a_ph.dt_ph
Density and temperature w.r.t. pressure and specific enthalpy

Information

This function calculates the density and temperature of R134a from absolute pressure and specific enthalpy. In one-phase region the function calls the fundamental Helmholtz equation of Tillner-Roth (1994). In two-phase the density and temperature is computed from cubic splines for saturated pressure, liquid and vapor density.

Restrictions

The function cannot be inverted in a numerical way. Please use functions rho_props_ph and T_props_ph for this purpose.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy

Outputs

Type	Name	Description
`Density`	`d`	Density
`Temperature`	`T`	Temperature

Function Modelica.Media.R134a.R134a_ph.dtofphOnePhase
Density and temperature w.r.t. pressure and specific enthalpy in one-phase region

Information

This function calculates the density and temperature of R134a from absolute pressure and specific enthalpy in one-phase region. The function calls the fundamental Helmholtz equation of Tillner-Roth (1994) which is requiring density and temperature for input. Thus, a newton iteration is performed to determine density and temperature. The newton iteration stops if the inputs for pressure difference delp and specific enthalpy difference delh are larger than the actual differences derived from the newton iteration.

Restrictions

The function shall only be used for one-phase inputs since the fundamental equation is not valid for two-phase states.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Enthalpy
`AbsolutePressure`	`delp`	Absolute error in p in iteration
`SpecificEnthalpy`	`delh`	Absolute error in h in iteration

Outputs

Type	Name	Description
`Density`	`d`	Density
`Temperature`	`T`	Temperature
`Integer`	`error`	1 if did not converged

Function Modelica.Media.R134a.R134a_ph.dtofpsOnePhase
Inverse iteration in one phase region (d,T) = f(p,s)

Information

This function calculates the density and temperature of R134a from absolute pressure and specific entropy in one-phase region. The function calls the fundamental helmholtz equation of Tillner-Roth (1994) which is requiring density and temperature for input. Thus, a newton iteration is performed to determine density and temperature. The newton iteration stops if the inputs for pressure difference delp and specific entropy difference dels are larger than the actual differences derived from the newton iteration.

Restrictions

The function shall only be used for one-phase inputs since the fundamental equation is not valid for two-phase states. The iteration could fail for liquid states with high pressures.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy
`AbsolutePressure`	`delp`	Absolute iteration accuracy
`SpecificEntropy`	`dels`	Absolute iteration accuracy

Outputs

Type	Name	Description
`Density`	`d`	Density
`Temperature`	`T`	Temperature
`Integer`	`error`	Error flag: trouble if different from 0

Function Modelica.Media.R134a.R134a_ph.f_R134a
Calculation of helmholtz derivatives by density and temperature

Information

This function adds the ideal gas contribution of the fundamental equation to the residual contribution and computes the helmholtz derivatives w.r.t. temperature and density.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Density`	`d`	Density
`Temperature`	`T`	Temperature

Outputs

Type	Name	Description
`HelmholtzDerivs`	`f`	Helmholtz derivatives

Function Modelica.Media.R134a.R134a_ph.fid_R134a
Helmholtz coefficients of ideal part

Information

This function computes the ideal gas helmholtz derivatives of the fundamental equation of Tillner-Roth and Baehr for R134a (1994) w.r.t. to reduced temperature (tau=T_crit/T) and reduced density (delta=rho/rho_crit).

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Real`	`delta`	Reduced density (delta=d/dcrit)
`Real`	`tau`	Reduced temperature (tau=Tcrit/T)

Outputs

Type	Name	Description
`HelmholtzDerivs`	`fid`	Helmholtz derivatives of ideal part

Function Modelica.Media.R134a.R134a_ph.fres_R134a
Calculation of helmholtz derivatives

Information

This function computes the residual helmholtz derivatives of the fundamental equation of Tillner-Roth and Baehr for R134a (1994) w.r.t. to reduced temperature (tau=T_crit/T) and reduced density (delta=rho/rho_crit). The function can be used for special properties depending just on the residual derivative parts.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Real`	`delta`	Reduced density (delta=d/dcrit)
`Real`	`tau`	Reduced temperature (tau=Tcrit/T)

Outputs

Type	Name	Description
`HelmholtzDerivs`	`f`	Helmholtz derivatives

Function Modelica.Media.R134a.R134a_ph.getPhase_ph
Number of phases by pressure and specific enthalpy

Information

This function computes the number of phases for R134a depending on the inputs for absolute pressure and specific enthalpy. It makes use of cubic spline functions for liquid and vapor specific enthalpy.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy

Outputs

Type	Name	Description
`Integer`	`phase`	Number of phases

Function Modelica.Media.R134a.R134a_ph.getPhase_ps
Number of phases by pressure and entropy

Information

This function computes the number of phases for R134a depending on the inputs for absolute pressure and specific entropy. It makes use of cubic spline functions for liquid and vapor specific entropy.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy

Outputs

Type	Name	Description
`Integer`	`phase`	Number of phases

Function Modelica.Media.R134a.R134a_ph.hofpsTwoPhase
Isentropic specific enthalpy in two phase region h(p,s)

Information

This function computes the specific enthalpy in two-phase for R134a depending on the inputs for absolute pressure and specific entropy. It makes use of cubic spline functions for liquid and vapor specific enthalpy as well as specific entropy.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEntropy`	`s`	Specific entropy

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h`	Specific enthalpy

Function Modelica.Media.R134a.R134a_ph.R134a_liqofdT
Properties on liquid boundary phase

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Temperature`	`T`	Temperature

Outputs

Type	Name	Description
`PhaseBoundaryProperties`	`liq`	Properties on liquid boundary phase

Function Modelica.Media.R134a.R134a_ph.R134a_vapofdT
Properties on vapor boundary phase

Information

This icon indicates Modelica functions.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Temperature`	`T`	Temperature

Outputs

Type	Name	Description
`PhaseBoundaryProperties`	`vap`	Properties on vapor boundary phase

Function Modelica.Media.R134a.R134a_ph.rho_ph_der
Time derivative function of density_ph

Information

This function calculates the derivative of density w.r.t. time. It is used as derivative function for rho_props_ph.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`InverseDerivatives_rhoT`	`derivs`	Record for derivatives
`Real`	`p_der`	Derivative of pressure
`Real`	`h_der`	Derivative of specific enthalpy

Outputs

Type	Name	Description
`Real`	`d_der`	Derivative of density

Function Modelica.Media.R134a.R134a_ph.rho_props_ph
Density as function of pressure and specific enthalpy

Information

This function integrates the derivative of density w.r.t. time in order to allow a numerical inversion for the complex fundamental equation of state.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Pressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`InverseDerivatives_rhoT`	`derivs`	Record for the calculation of rho_ph_der

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.T_ph_der
Time derivative function of T_ph

Information

This function calculates the derivative of temperature w.r.t. time. It is used as derivative function for T_props_ph.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`InverseDerivatives_rhoT`	`derivs`	Auxiliary record
`Real`	`p_der`	Derivative of pressure
`Real`	`h_der`	Derivative of specific enthalpy

Outputs

Type	Name	Description
`Real`	`T_der`	Derivative of temperature

Function Modelica.Media.R134a.R134a_ph.T_props_ph
Temperature as function of pressure and specific enthalpy

Information

This function integrates the derivative of temperature w.r.t. time in order to allow a numerical inversion for the complex fundamental equation of state.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`AbsolutePressure`	`p`	Pressure
`SpecificEnthalpy`	`h`	Specific enthalpy
`InverseDerivatives_rhoT`	`derivs`	Record for the calculation of T_ph_der

Outputs

Type	Name	Description
`Temperature`	`T`	Temperature

Function Modelica.Media.R134a.R134a_ph.dofpT
Compute d for given p and T

Information

This function calculates the density of R134a from absolute pressure and temperature. The function can only be executed in one-phase region. The safety margin to the phase boundary is 1[K] and 1000[Pa].

Restrictions

The function cannot be inverted in a numerical way. Please use functions rho_props_ph and T_props_ph for this purpose.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Pressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`Pressure`	`delp`	Iteration converged if (p-pre(p) < delp)

Outputs

Type	Name	Description
`Density`	`d`	Density

Function Modelica.Media.R134a.R134a_ph.hofpT
Compute h for given p and T

Information

This function calculates the specific enthalpy of R134a from absolute pressure and temperature. The function can only be executed in one-phase region. The safety margin to the phase boundary is 1[K] and 1000[Pa].

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Pressure`	`p`	Pressure
`Temperature`	`T`	Temperature
`Pressure`	`delp`	Iteration converged if (p-pre(p) < delp)

Outputs

Type	Name	Description
`SpecificEnthalpy`	`h`	Specific Enthalpy

Function Modelica.Media.R134a.R134a_ph.phaseBoundaryAssert
Assert function for checking threshold to phase boundary

Information

This function is used as a guard for property functions using pTX as an input. Property functions for two-phase media using pressure and temperature as inputs shall not be used close to the phase boundary in order to avoid errors and high deviations for just small deviations in the input arguments. The refrigerant state can not be determined in the two-phase region using pressure and temperature.

Extends from Modelica.Icons.Function (Icon for functions).

Inputs

Type	Name	Description
`Pressure`	`p`	Refrigerant pressure
`Temperature`	`T`	Refrigerant temperature

Generated 2018-12-12 12:14:19 EST by MapleSim.

Package Modelica.​Media.​R134a.​R134a_phMedium model for R134a and p,h as states

Information

Restriction

Package Contents

Package Constants

Type Modelica.​Media.​R134a.​R134a_ph.​AbsolutePressureType for absolute pressure with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​DensityType for density with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​DynamicViscosityType for dynamic viscosity with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​EnthalpyFlowRateType for enthalpy flow rate with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​MassFractionType for mass fraction with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​MoleFractionType for mole fraction with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​MolarMassType for molar mass with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​MolarVolumeType for molar volume with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​IsentropicExponentType for isentropic exponent with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​SpecificEnergyType for specific energy with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​SpecificInternalEnergyType for specific internal energy with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​SpecificEnthalpyType for specific enthalpy with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​SpecificEntropyType for specific entropy with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​SpecificHeatCapacityType for specific heat capacity with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​SurfaceTensionType for surface tension with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​TemperatureType for temperature with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​ThermalConductivityType for thermal conductivity with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​PrandtlNumberType for Prandtl number with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​VelocityOfSoundType for velocity of sound with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​ExtraPropertyType for unspecified, mass-specific property transported by flow

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​CumulativeExtraPropertyType for conserved integral of unspecified, mass specific property

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​ExtraPropertyFlowRateType for flow rate of unspecified, mass-specific property

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​IsobaricExpansionCoefficientType for isobaric expansion coefficient with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​DipoleMomentType for dipole moment with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​DerDensityByPressureType for partial derivative of density with respect to pressure with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​DerDensityByEnthalpyType for partial derivative of density with respect to enthalpy with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​DerEnthalpyByPressureType for partial derivative of enthalpy with respect to pressure with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​DerDensityByTemperatureType for partial derivative of density with respect to temperature with medium specific attributes

Attributes

Type Modelica.​Media.​R134a.​R134a_ph.​DerTemperatureByPressureType for partial derivative of temperature with respect to pressure with medium specific attributes

Attributes

Record Modelica.​Media.​R134a.​R134a_ph.​SaturationPropertiesSaturation properties of two phase medium

Information

Fields

Record Modelica.​Media.​R134a.​R134a_ph.​FluidLimitsValidity limits for fluid model

Information

Fields

Type Modelica.​Media.​R134a.​R134a_ph.​FixedPhasePhase of the fluid: 1 for 1-phase, 2 for two-phase, 0 for not known, e.g., interactive use

Attributes

Record Modelica.​Media.​R134a.​R134a_ph.​FluidConstantsExtended fluid constants

Information

Fields

Record Modelica.​Media.​R134a.​R134a_ph.​ThermodynamicStateThermodynamic state

Information

Fields

Model Modelica.​Media.​R134a.​R134a_ph.​BasePropertiesBase properties of R134a

Information

Parameters

Package Modelica.Media.R134a.R134a_ph
Medium model for R134a and p,h as states

Type Modelica.Media.R134a.R134a_ph.AbsolutePressure
Type for absolute pressure with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.Density
Type for density with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.DynamicViscosity
Type for dynamic viscosity with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.EnthalpyFlowRate
Type for enthalpy flow rate with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.MassFraction
Type for mass fraction with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.MoleFraction
Type for mole fraction with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.MolarMass
Type for molar mass with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.MolarVolume
Type for molar volume with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.IsentropicExponent
Type for isentropic exponent with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.SpecificEnergy
Type for specific energy with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.SpecificInternalEnergy
Type for specific internal energy with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.SpecificEnthalpy
Type for specific enthalpy with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.SpecificEntropy
Type for specific entropy with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.SpecificHeatCapacity
Type for specific heat capacity with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.SurfaceTension
Type for surface tension with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.Temperature
Type for temperature with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.ThermalConductivity
Type for thermal conductivity with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.PrandtlNumber
Type for Prandtl number with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.VelocityOfSound
Type for velocity of sound with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.ExtraProperty
Type for unspecified, mass-specific property transported by flow

Type Modelica.Media.R134a.R134a_ph.CumulativeExtraProperty
Type for conserved integral of unspecified, mass specific property

Type Modelica.Media.R134a.R134a_ph.ExtraPropertyFlowRate
Type for flow rate of unspecified, mass-specific property

Type Modelica.Media.R134a.R134a_ph.IsobaricExpansionCoefficient
Type for isobaric expansion coefficient with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.DipoleMoment
Type for dipole moment with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.DerDensityByPressure
Type for partial derivative of density with respect to pressure with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.DerDensityByEnthalpy
Type for partial derivative of density with respect to enthalpy with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.DerEnthalpyByPressure
Type for partial derivative of enthalpy with respect to pressure with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.DerDensityByTemperature
Type for partial derivative of density with respect to temperature with medium specific attributes

Type Modelica.Media.R134a.R134a_ph.DerTemperatureByPressure
Type for partial derivative of temperature with respect to pressure with medium specific attributes

Record Modelica.Media.R134a.R134a_ph.SaturationProperties
Saturation properties of two phase medium

Record Modelica.Media.R134a.R134a_ph.FluidLimits
Validity limits for fluid model

Type Modelica.Media.R134a.R134a_ph.FixedPhase
Phase of the fluid: 1 for 1-phase, 2 for two-phase, 0 for not known, e.g., interactive use

Record Modelica.Media.R134a.R134a_ph.FluidConstants
Extended fluid constants

Record Modelica.Media.R134a.R134a_ph.ThermodynamicState
Thermodynamic state

Model Modelica.Media.R134a.R134a_ph.BaseProperties
Base properties of R134a

Function Modelica.Media.R134a.R134a_ph.setState_pTX
Set state for pressure and temperature (X not used since single substance)

Function Modelica.Media.R134a.R134a_ph.setState_phX
Set state for pressure and specific enthalpy (X not used since single substance)

Function Modelica.Media.R134a.R134a_ph.setState_psX
Set state for pressure and specific entropy (X not used since single substance)

Function Modelica.Media.R134a.R134a_ph.setState_dTX
Set state for density and temperature (X not used since single substance)

Function Modelica.Media.R134a.R134a_ph.setSmoothState
Smooth transition function between state_a and state_b

Function Modelica.Media.R134a.R134a_ph.dynamicViscosity
Dynamic viscosity w.r.t. temperature and density | use setState_phX function for input

Function Modelica.Media.R134a.R134a_ph.thermalConductivity
Thermal conductivity w.r.t. thermodynamic state | use setState_phX function for input

Function Modelica.Media.R134a.R134a_ph.prandtlNumber
Return the Prandtl number

Function Modelica.Media.R134a.R134a_ph.pressure
Pressure w.r.t. thermodynamic state

Function Modelica.Media.R134a.R134a_ph.temperature
Temperature as function of pressure and specific enthalpy | use setState_phX function for input

Function Modelica.Media.R134a.R134a_ph.density
Density as function of pressure and specific enthalpy | use setState_phX function for input

Function Modelica.Media.R134a.R134a_ph.specificEnthalpy
Specific enthalpy w.r.t. thermodynamic state | use setState_phX function for input

Function Modelica.Media.R134a.R134a_ph.specificInternalEnergy
Specific internal energy w.r.t. thermodynamic state

Function Modelica.Media.R134a.R134a_ph.specificEntropy
Specific entropy w.r.t. thermodynamic state | use setState_phX function for input if necessary

Function Modelica.Media.R134a.R134a_ph.specificGibbsEnergy
Specific gibbs energy w.r.t. thermodynamic state

Function Modelica.Media.R134a.R134a_ph.specificHelmholtzEnergy
Helmholtz energy w.r.t. thermodynamic state

Function Modelica.Media.R134a.R134a_ph.specificHeatCapacityCp
Specific heat capacity at constant pressure | turns infinite in two-phase region! | use setState_phX function for input