IF97 (IF97 by Hummeling Engineering)

java.lang.Object
- com.hummeling.if97.IF97

```
public class IF97
extends java.lang.Object
```
Steam tables for industrial use according to the international standard for the properties of water and steam, the IAPWS-IF97 formulation and the international standards for transport and other properties.

By default, units are as given in the book cited below. See IF97.UnitSystem for options.

Properties are generally available as functions of three quantity combinations: pressure & temperature (p, T), pressure & specific enthalpy (p, h), and specific enthalpy & specific entropy (h, s).
- Wagner, Wolfgang & Kretzschmar, Hans-Joachim, 2008, International Steam Tables — Properties of Water and Steam Based on the Industrial Formulation IAPWS-IF97, 2^nd Edition, Springer-Verlag, Berlin Heidelberg, ISBN 978-3-540-21419-9
Author:

Ralph Hummeling (www.hummeling.com)

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`private static class`	`IF97.Calculate` Calculate in default units.
`static class`	`IF97.Quantity` Quantities for partial derivatives.
`static class`	`IF97.UnitSystem` Unit systems.

Field Summary

Fields
Modifier and Type	Field and Description
`(package private) static double`	`BTU`
`(package private) static double`	`ft`
`(package private) static double`	`ft2`
`(package private) static double`	`ft3`
`(package private) static double`	`g`
`static double`	`hc` Critical enthalpy [kJ/kg].
`(package private) static double`	`hr`
`(package private) static double`	`in`
`(package private) static double`	`in2`
`(package private) static double`	`lb`
`(package private) static double`	`lbf`
`static double`	`M` Molar mass of ordinary water [kg/kmol].
`static double`	`pc` Critical pressure [MPa].
`(package private) static double`	`psi`
`static double`	`R` Specific gas constant of ordinary water [kJ/kg-K].
`(package private) static double`	`Ra`
`static double`	`rhoc` Critical density [kg/m3].
`static double`	`Rm` Molar gas constant of ordinary water [kJ/kmol-K].
`static double`	`sc` Critical entropy [kJ/kg-K].
`static double`	`Tc` Critical temperature [K].
`private IF97.UnitSystem`	`UNIT_SYSTEM`

Constructor Summary

Constructors
Constructor and Description
`IF97()` Instantiate an IF97 object with the default unit system.
`IF97(IF97.UnitSystem unitSystem)` Instantiate an IF97 object with the specified unit system.

Method Summary

Methods
Modifier and Type	Method and Description
`double`	`compressibilityHS(double enthalpy, double entropy)` Isothermal compressibility as a function of specific enthalpy & specific entropy.
`double`	`compressibilityPH(double pressure, double enthalpy)` Isothermal compressibility as a function of pressure & specific enthalpy.
`double`	`compressibilityPT(double pressure, double temperature)` Isothermal compressibility as a function of pressure & temperature.
`(package private) static double`	`convertFromDefault(double[] quantity, double value)`
`(package private) static double`	`convertFromDefault(IF97.UnitSystem unitSystem, IF97.Quantity quantity, double value)`
`(package private) static double`	`convertToDefault(double[] quantity, double value)`
`double`	`densityPH(double pressure, double enthalpy)` Density as a function of pressure & specific enthalpy.
`double`	`densityPT(double pressure, double temperature)` Density as a function of pressure & temperature.
`double`	`dielectricConstantPH(double pressure, double enthalpy)` Dielectric constant.
`double`	`dielectricConstantPT(double pressure, double temperature)` Dielectric constant.
`double`	`dielectricConstantRhoT(double density, double temperature)` Dielectric constant.
`double`	`dynamicViscosityPH(double pressure, double enthalpy)` Dynamic viscosity as a function of pressure & specific enthalpy.
`double`	`dynamicViscosityPT(double pressure, double temperature)` Dynamic viscosity.
`double`	`dynamicViscosityRhoT(double density, double temperature)` Dynamic viscosity.
`double`	`isobaricCubicExpansionCoefficientPH(double pressure, double enthalpy)` Isobaric cubic expansion coefficient.
`double`	`isobaricCubicExpansionCoefficientPT(double pressure, double temperature)` Isobaric cubic expansion coefficient.
`double`	`isobaricHeatCapacityPH(double pressure, double enthalpy)` Specific isobaric heat capacity as a function of pressure & specific enthalpy.
`double`	`isobaricHeatCapacityPT(double pressure, double temperature)` Specific isobaric heat capacity as a function of pressure & temperature.
`double`	`isochoricHeatCapacityPH(double pressure, double enthalpy)` Specific isochoric heat capacity as a function of pressure & specific enthalpy.
`double`	`isochoricHeatCapacityPT(double pressure, double temperature)` Specific isochoric heat capacity as a function of pressure & temperature.
`double`	`kinematicViscosityPH(double pressure, double enthalpy)` Kinematic viscosity.
`double`	`kinematicViscosityPT(double pressure, double temperature)` Kinematic viscosity.
`double`	`kinematicViscosityRhoT(double density, double temperature)` Kinematic viscosity.
`double`	`partialDerivativePT(double pressure, double temperature, IF97.Quantity x, IF97.Quantity y, IF97.Quantity z)` Partial derivative of z with respect to x for constant y, as a function of pressure and temperature.
`double`	`partialDerivativeRhoT(double density, double temperature, IF97.Quantity x, IF97.Quantity y, IF97.Quantity z)` Partial derivative of z with respect to x for constant y, as a function of density and temperature.
`double`	`PrandtlHS(double enthalpy, double entropy)` Prandtl number.
`double`	`PrandtlPH(double pressure, double enthalpy)` Prandtl number.
`double`	`PrandtlPT(double pressure, double temperature)` Prandtl number.
`double`	`pressureHS(double enthalpy, double entropy)` Pressure as a function of specific enthalpy & specific entropy.
`double`	`refractiveIndexPTLambda(double pressure, double temperature, double wavelength)` Refractive index.
`double`	`refractiveIndexRhoTLambda(double density, double temperature, double waveLength)` Refractive index.
`double`	`saturationPressureH(double enthalpy)` Boundary saturation pressure for the boundary between regions 3 and 4.
`double`	`saturationPressureS(double entropy)` Boundary saturation pressure for the boundary between regions 3 and 4.
`double`	`saturationPressureT(double temperature)` Saturation pressure as a function of temperature.
`double`	`saturationTemperatureP(double pressure)` Saturation temperature as a function of pressure.
`void`	`setUnitSystem(IF97.UnitSystem unitSystem)` Set (change) the unit system.
`double`	`specificEnthalpyPS(double pressure, double entropy)` Specific enthalpy as a function of pressure & specific entropy.
`double`	`specificEnthalpyPT(double pressure, double temperature)` Specific enthalpy as a function of pressure & temperature.
`double`	`specificEnthalpyPX(double pressure, double vapourFraction)` Specific enthalpy as a function of pressure & vapour fraction.
`double`	`specificEnthalpySaturatedLiquidP(double pressure)` Specific enthalpy as a function of pressure for saturated liquid.
`double`	`specificEnthalpySaturatedLiquidT(double temperature)` Specific enthalpy as a function of temperature for saturated liquid.
`double`	`specificEnthalpySaturatedVapourP(double pressure)` Specific enthalpy as a function of pressure for saturated vapour.
`double`	`specificEnthalpySaturatedVapourT(double temperature)` Specific enthalpy as a function of temperature for saturated vapour.
`double`	`specificEnthalpyTX(double temperature, double vapourFraction)` Specific enthalpy as a function of temperature & vapour fraction.
`double`	`specificEntropyPH(double pressure, double enthalpy)` Specific entropy as a function of pressure & specific enthalpy.
`double`	`specificEntropyPT(double pressure, double temperature)` Specific entropy as a function of pressure & temperature.
`double`	`specificEntropyPX(double pressure, double vapourFraction)` Specific entropy as a function of pressure & vapour fraction.
`double`	`specificEntropySaturatedLiquidP(double pressure)` Specific entropy as a function of pressure for saturated liquid.
`double`	`specificEntropySaturatedLiquidT(double temperature)` Specific entropy as a function of temperature for saturated liquid.
`double`	`specificEntropySaturatedVapourP(double pressure)` Specific entropy as a function of pressure for saturated vapour.
`double`	`specificEntropySaturatedVapourT(double temperature)` Specific entropy as a function of temperature for saturated vapour.
`double`	`specificEntropyTX(double temperature, double vapourFraction)` Specific entropy as a function of temperature & vapour fraction.
`double`	`specificInternalEnergyHS(double enthalpy, double entropy)` Specific internal energy as a function of specific enthalpy & specific entropy.
`double`	`specificInternalEnergyPH(double pressure, double enthalpy)` Specific internal energy as a function of pressure & specific enthalpy.
`double`	`specificInternalEnergyPT(double pressure, double temperature)` Specific internal energy as a function of pressure & temperature.
`double`	`specificVolumePH(double pressure, double enthalpy)` Specific volume as a function of pressure & specific enthalpy.
`double`	`specificVolumePT(double pressure, double temperature)` Specific volume as a function of pressure & temperature.
`double`	`speedOfSoundPT(double pressure, double temperature)` Speed of sound as a function of pressure & temperature.
`double`	`surfaceTensionT(double temperature)` Surface tension as a function of temperature.
`double`	`temperatureHS(double enthalpy, double entropy)` Temperature.
`double`	`temperaturePH(double pressure, double enthalpy)` Temperature.
`double`	`temperaturePS(double pressure, double entropy)` Temperature.
`double`	`thermalConductivityPH(double pressure, double enthalpy)` Thermal conductivity as a function of pressure & specific enthalpy.
`double`	`thermalConductivityPT(double pressure, double temperature)` Thermal conductivity as a function of pressure & temperature.
`double`	`vapourFractionHS(double enthalpy, double entropy)` Vapour fraction as a function of specific enthalpy & specific entropy.
`double`	`vapourFractionPS(double pressure, double entropy)` Vapour fraction as a function of pressure & specific entropy.
`double`	`vapourFractionTS(double temperature, double entropy)` Vapour fraction as a function of temperature & specific entropy.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - UNIT_SYSTEM
```
private IF97.UnitSystem UNIT_SYSTEM
```
  - R
```
public static final double R
```
    Specific gas constant of ordinary water [kJ/kg-K].
    
    See Also:
    Constant Field Values
  - Rm
```
public static final double Rm
```
    Molar gas constant of ordinary water [kJ/kmol-K].
    
    See Also:
    Constant Field Values
  - M
```
public static final double M
```
    Molar mass of ordinary water [kg/kmol].
    
    See Also:
    Constant Field Values
  - Tc
```
public static final double Tc
```
    Critical temperature [K].
    
    See Also:
    Constant Field Values
  - pc
```
public static final double pc
```
    Critical pressure [MPa].
    
    See Also:
    Constant Field Values
  - hc
```
public static final double hc
```
    Critical enthalpy [kJ/kg].
    
    See Also:
    Constant Field Values
  - sc
```
public static final double sc
```
    Critical entropy [kJ/kg-K].
    
    See Also:
    Constant Field Values
  - rhoc
```
public static final double rhoc
```
    Critical density [kg/m3].
    
    See Also:
    Constant Field Values
  - BTU
```
static final double BTU
```
  - ft
```
static final double ft
```
  - ft2
```
static final double ft2
```
  - ft3
```
static final double ft3
```
  - g
```
static final double g
```
  - hr
```
static final double hr
```
  - in
```
static final double in
```
  - in2
```
static final double in2
```
  - lb
```
static final double lb
```
  - lbf
```
static final double lbf
```
  - psi
```
static final double psi
```
  - Ra
```
static final double Ra
```
- Constructor Detail
  - IF97
```
public IF97()
```
    Instantiate an IF97 object with the default unit system.
  - IF97
```
public IF97(IF97.UnitSystem unitSystem)
```
    Instantiate an IF97 object with the specified unit system.
    
    Parameters:
    unitSystem - unit system
- Method Detail
  - PrandtlHS
```
public double PrandtlHS(double enthalpy,
               double entropy)
                 throws OutOfRangeException
```
    Prandtl number.
    
    Parameters:
    enthalpy - specific enthalpy
    entropy - specific entropy
    
    Returns:
    Prandtl number
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - PrandtlPH
```
public double PrandtlPH(double pressure,
               double enthalpy)
                 throws OutOfRangeException
```
    Prandtl number.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    Prandtl number
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - PrandtlPT
```
public double PrandtlPT(double pressure,
               double temperature)
                 throws OutOfRangeException
```
    Prandtl number.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    Prandtl number
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - compressibilityHS
```
public double compressibilityHS(double enthalpy,
                       double entropy)
                         throws OutOfRangeException
```
    Isothermal compressibility as a function of specific enthalpy & specific entropy.
    
    Parameters:
    enthalpy - specific enthalpy
    entropy - specific entropy
    
    Returns:
    isothermal compressibility
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - compressibilityPH
```
public double compressibilityPH(double pressure,
                       double enthalpy)
                         throws OutOfRangeException
```
    Isothermal compressibility as a function of pressure & specific enthalpy.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    isothermal compressibility
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - compressibilityPT
```
public double compressibilityPT(double pressure,
                       double temperature)
                         throws OutOfRangeException
```
    Isothermal compressibility as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    isothermal compressibility
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - convertFromDefault
```
static double convertFromDefault(IF97.UnitSystem unitSystem,
                        IF97.Quantity quantity,
                        double value)
```
  - convertFromDefault
```
static double convertFromDefault(double[] quantity,
                        double value)
```
  - convertToDefault
```
static double convertToDefault(double[] quantity,
                      double value)
```
  - densityPH
```
public double densityPH(double pressure,
               double enthalpy)
                 throws OutOfRangeException
```
    Density as a function of pressure & specific enthalpy.
    This is a convenience method which simply calls 1/specificVolumePH(pressure, enthalpy).
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    density
    
    Throws:
    
    OutOfRangeException - out-of-range exception
    See Also:
    specificVolumePH(double, double)
  - densityPT
```
public double densityPT(double pressure,
               double temperature)
                 throws OutOfRangeException
```
    Density as a function of pressure & temperature.
    This is a convenience method which simply calls 1/specificVolumePT(pressure, temperature).
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    density
    
    Throws:
    
    OutOfRangeException - out-of-range exception
    See Also:
    specificVolumePT(double, double)
  - dielectricConstantPH
```
public double dielectricConstantPH(double pressure,
                          double enthalpy)
                            throws OutOfRangeException
```
    Dielectric constant.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    dielectric constant [-]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - dielectricConstantPT
```
public double dielectricConstantPT(double pressure,
                          double temperature)
                            throws OutOfRangeException
```
    Dielectric constant.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    dielectric constant [-]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - dielectricConstantRhoT
```
public double dielectricConstantRhoT(double density,
                            double temperature)
                              throws OutOfRangeException
```
    Dielectric constant.
    
    Parameters:
    density - density
    temperature - temperature
    
    Returns:
    dielectric constant [-]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - dynamicViscosityPH
```
public double dynamicViscosityPH(double pressure,
                        double enthalpy)
                          throws OutOfRangeException
```
    Dynamic viscosity as a function of pressure & specific enthalpy.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    dynamic viscosity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - dynamicViscosityPT
```
public double dynamicViscosityPT(double pressure,
                        double temperature)
                          throws OutOfRangeException
```
    Dynamic viscosity.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    dynamic viscosity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - dynamicViscosityRhoT
```
public double dynamicViscosityRhoT(double density,
                          double temperature)
                            throws OutOfRangeException
```
    Dynamic viscosity.
    
    Parameters:
    density - density
    temperature - temperature
    
    Returns:
    dynamic viscosity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - isobaricCubicExpansionCoefficientPH
```
public double isobaricCubicExpansionCoefficientPH(double pressure,
                                         double enthalpy)
                                           throws OutOfRangeException
```
    Isobaric cubic expansion coefficient.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    isobaric cubic expansion coefficient
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - isobaricCubicExpansionCoefficientPT
```
public double isobaricCubicExpansionCoefficientPT(double pressure,
                                         double temperature)
                                           throws OutOfRangeException
```
    Isobaric cubic expansion coefficient.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    isobaric cubic expansion coefficient
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - isobaricHeatCapacityPH
```
public double isobaricHeatCapacityPH(double pressure,
                            double enthalpy)
                              throws OutOfRangeException
```
    Specific isobaric heat capacity as a function of pressure & specific enthalpy.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    specific isobaric heat capacity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - isobaricHeatCapacityPT
```
public double isobaricHeatCapacityPT(double pressure,
                            double temperature)
                              throws OutOfRangeException
```
    Specific isobaric heat capacity as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    specific isobaric heat capacity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - isochoricHeatCapacityPH
```
public double isochoricHeatCapacityPH(double pressure,
                             double enthalpy)
                               throws OutOfRangeException
```
    Specific isochoric heat capacity as a function of pressure & specific enthalpy.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    specific isochoric heat capacity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - isochoricHeatCapacityPT
```
public double isochoricHeatCapacityPT(double pressure,
                             double temperature)
                               throws OutOfRangeException
```
    Specific isochoric heat capacity as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    specific isochoric heat capacity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - kinematicViscosityPH
```
public double kinematicViscosityPH(double pressure,
                          double enthalpy)
                            throws OutOfRangeException
```
    Kinematic viscosity.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    kinematic viscosity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - kinematicViscosityPT
```
public double kinematicViscosityPT(double pressure,
                          double temperature)
                            throws OutOfRangeException
```
    Kinematic viscosity.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    kinematic viscosity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - kinematicViscosityRhoT
```
public double kinematicViscosityRhoT(double density,
                            double temperature)
                              throws OutOfRangeException
```
    Kinematic viscosity.
    
    Parameters:
    density - density
    temperature - temperature
    
    Returns:
    kinematic viscosity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - partialDerivativePT
```
public double partialDerivativePT(double pressure,
                         double temperature,
                         IF97.Quantity x,
                         IF97.Quantity y,
                         IF97.Quantity z)
                           throws OutOfRangeException
```
    Partial derivative of z with respect to x for constant y, as a function of pressure and temperature.
    (^∂z/_∂x)_y(p, T)
    
    Parameters:
    pressure - pressure
    temperature - temperature
    x - any IF97.Quantity
    y - any IF97.Quantity
    z - any IF97.Quantity
    
    Returns:
    partial derivative in default units
    
    Throws:
    
    OutOfRangeException
  - partialDerivativeRhoT
```
public double partialDerivativeRhoT(double density,
                           double temperature,
                           IF97.Quantity x,
                           IF97.Quantity y,
                           IF97.Quantity z)
                             throws OutOfRangeException
```
    Partial derivative of z with respect to x for constant y, as a function of density and temperature.
    (^∂z/_∂x)_y(ρ, T)
    
    Parameters:
    density - density
    temperature - temperature
    x - any IF97.Quantity
    y - any IF97.Quantity
    z - any IF97.Quantity
    
    Returns:
    partial derivative in default units
    
    Throws:
    
    OutOfRangeException
  - pressureHS
```
public double pressureHS(double enthalpy,
                double entropy)
                  throws OutOfRangeException
```
    Pressure as a function of specific enthalpy & specific entropy.
    
    Parameters:
    enthalpy - specific enthalpy
    entropy - specific entropy
    
    Returns:
    pressure
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - refractiveIndexPTLambda
```
public double refractiveIndexPTLambda(double pressure,
                             double temperature,
                             double wavelength)
                               throws OutOfRangeException
```
    Refractive index.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    wavelength - wavelength
    
    Returns:
    refractive index [-]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - refractiveIndexRhoTLambda
```
public double refractiveIndexRhoTLambda(double density,
                               double temperature,
                               double waveLength)
                                 throws OutOfRangeException
```
    Refractive index.
    
    Parameters:
    density - density [kg/m3]
    temperature - temperature [K]
    waveLength - wave length [10^-6 m]
    
    Returns:
    refractive index [-]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - saturationPressureH
```
public double saturationPressureH(double enthalpy)
```
    Boundary saturation pressure for the boundary between regions 3 and 4.
    
    Parameters:
    enthalpy - specific enthalpy
    
    Returns:
    saturation pressure
  - saturationPressureS
```
public double saturationPressureS(double entropy)
```
    Boundary saturation pressure for the boundary between regions 3 and 4.
    
    Parameters:
    entropy - specific entropy
    
    Returns:
    saturation pressure
  - saturationPressureT
```
public double saturationPressureT(double temperature)
                           throws OutOfRangeException
```
    Saturation pressure as a function of temperature.
    
    Parameters:
    temperature - saturation temperature
    
    Returns:
    saturation pressure
    
    Throws:
    
    OutOfRangeException
  - saturationTemperatureP
```
public double saturationTemperatureP(double pressure)
                              throws OutOfRangeException
```
    Saturation temperature as a function of pressure.
    
    Parameters:
    pressure - saturation pressure
    
    Returns:
    saturation temperature
    
    Throws:
    
    OutOfRangeException
  - setUnitSystem
```
public final void setUnitSystem(IF97.UnitSystem unitSystem)
```
    Set (change) the unit system.
    
    Parameters:
    unitSystem - unit system
  - specificEnthalpyPS
```
public double specificEnthalpyPS(double pressure,
                        double entropy)
                          throws OutOfRangeException
```
    Specific enthalpy as a function of pressure & specific entropy.
    
    Parameters:
    pressure - pressure
    entropy - specific entropy
    
    Returns:
    specific enthalpy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificEnthalpyPT
```
public double specificEnthalpyPT(double pressure,
                        double temperature)
                          throws OutOfRangeException
```
    Specific enthalpy as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    specific enthalpy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificEnthalpyPX
```
public double specificEnthalpyPX(double pressure,
                        double vapourFraction)
                          throws OutOfRangeException
```
    Specific enthalpy as a function of pressure & vapour fraction.
    
    Parameters:
    pressure - pressure
    vapourFraction - vapour fraction [-]
    
    Returns:
    specific enthalpy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificEnthalpySaturatedLiquidP
```
public double specificEnthalpySaturatedLiquidP(double pressure)
                                        throws OutOfRangeException
```
    Specific enthalpy as a function of pressure for saturated liquid.
    This is a convenience method which simply calls specificEnthalpyPX(pressure, 0).
    
    Parameters:
    pressure - saturation pressure
    
    Returns:
    specific enthalpy
    
    Throws:
    
    OutOfRangeException
    See Also:
    specificEnthalpyPX(double, double)
  - specificEnthalpySaturatedLiquidT
```
public double specificEnthalpySaturatedLiquidT(double temperature)
                                        throws OutOfRangeException
```
    Specific enthalpy as a function of temperature for saturated liquid.
    This is a convenience method which simply calls specificEnthalpyTX(temperature, 0).
    
    Parameters:
    temperature - saturation temperature
    
    Returns:
    specific enthalpy
    
    Throws:
    
    OutOfRangeException
    See Also:
    specificEnthalpyTX(double, double)
  - specificEnthalpySaturatedVapourP
```
public double specificEnthalpySaturatedVapourP(double pressure)
                                        throws OutOfRangeException
```
    Specific enthalpy as a function of pressure for saturated vapour.
    This is a convenience method which simply calls specificEnthalpyPX(pressure, 1).
    
    Parameters:
    pressure - saturation pressure
    
    Returns:
    specific enthalpy
    
    Throws:
    
    OutOfRangeException
    See Also:
    specificEnthalpyPX(double, double)
  - specificEnthalpySaturatedVapourT
```
public double specificEnthalpySaturatedVapourT(double temperature)
                                        throws OutOfRangeException
```
    Specific enthalpy as a function of temperature for saturated vapour.
    This is a convenience method which simply calls specificEnthalpyTX(temperature, 1).
    
    Parameters:
    temperature - saturation temperature
    
    Returns:
    specific enthalpy
    
    Throws:
    
    OutOfRangeException
    See Also:
    specificEnthalpyTX(double, double)
  - specificEnthalpyTX
```
public double specificEnthalpyTX(double temperature,
                        double vapourFraction)
                          throws OutOfRangeException
```
    Specific enthalpy as a function of temperature & vapour fraction.
    
    Parameters:
    temperature - temperature
    vapourFraction - vapour fraction [-]
    
    Returns:
    specific enthalpy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificEntropyPH
```
public double specificEntropyPH(double pressure,
                       double enthalpy)
                         throws OutOfRangeException
```
    Specific entropy as a function of pressure & specific enthalpy.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    specific entropy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificEntropyPT
```
public double specificEntropyPT(double pressure,
                       double temperature)
                         throws OutOfRangeException
```
    Specific entropy as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    specific entropy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificEntropyPX
```
public double specificEntropyPX(double pressure,
                       double vapourFraction)
                         throws OutOfRangeException
```
    Specific entropy as a function of pressure & vapour fraction.
    
    Parameters:
    pressure - pressure
    vapourFraction - vapour fraction [-]
    
    Returns:
    specific entropy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificEntropySaturatedLiquidP
```
public double specificEntropySaturatedLiquidP(double pressure)
                                       throws OutOfRangeException
```
    Specific entropy as a function of pressure for saturated liquid.
    This is a convenience method which simply calls specificEntropyPX(pressure, 0).
    
    Parameters:
    pressure - saturation pressure
    
    Returns:
    specific entropy
    
    Throws:
    
    OutOfRangeException
    See Also:
    specificEntropyPX(double, double)
  - specificEntropySaturatedLiquidT
```
public double specificEntropySaturatedLiquidT(double temperature)
                                       throws OutOfRangeException
```
    Specific entropy as a function of temperature for saturated liquid.
    This is a convenience method which simply calls specificEntropyTX(temperature, 0).
    
    Parameters:
    temperature - saturation temperature
    
    Returns:
    specific entropy
    
    Throws:
    
    OutOfRangeException
    See Also:
    specificEntropyTX(double, double)
  - specificEntropySaturatedVapourP
```
public double specificEntropySaturatedVapourP(double pressure)
                                       throws OutOfRangeException
```
    Specific entropy as a function of pressure for saturated vapour.
    This is a convenience method which simply calls specificEntropyPX(pressure, 1).
    
    Parameters:
    pressure - saturation pressure
    
    Returns:
    specific entropy
    
    Throws:
    
    OutOfRangeException
    See Also:
    specificEntropyPX(double, double)
  - specificEntropySaturatedVapourT
```
public double specificEntropySaturatedVapourT(double temperature)
                                       throws OutOfRangeException
```
    Specific entropy as a function of temperature for saturated vapour.
    This is a convenience method which simply calls specificEntropyTX(temperature, 1).
    
    Parameters:
    temperature - saturation temperature
    
    Returns:
    specific entropy
    
    Throws:
    
    OutOfRangeException
    See Also:
    specificEntropyTX(double, double)
  - specificEntropyTX
```
public double specificEntropyTX(double temperature,
                       double vapourFraction)
                         throws OutOfRangeException
```
    Specific entropy as a function of temperature & vapour fraction.
    
    Parameters:
    temperature - temperature
    vapourFraction - vapour fraction [-]
    
    Returns:
    specific entropy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificInternalEnergyHS
```
public double specificInternalEnergyHS(double enthalpy,
                              double entropy)
                                throws OutOfRangeException
```
    Specific internal energy as a function of specific enthalpy & specific entropy.
    
    Parameters:
    enthalpy - specific enthalpy
    entropy - specific entropy
    
    Returns:
    specific internal energy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificInternalEnergyPH
```
public double specificInternalEnergyPH(double pressure,
                              double enthalpy)
                                throws OutOfRangeException
```
    Specific internal energy as a function of pressure & specific enthalpy.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    specific internal energy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificInternalEnergyPT
```
public double specificInternalEnergyPT(double pressure,
                              double temperature)
                                throws OutOfRangeException
```
    Specific internal energy as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    specific internal energy
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificVolumePH
```
public double specificVolumePH(double pressure,
                      double enthalpy)
                        throws OutOfRangeException
```
    Specific volume as a function of pressure & specific enthalpy.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    specific volume
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - specificVolumePT
```
public double specificVolumePT(double pressure,
                      double temperature)
                        throws OutOfRangeException
```
    Specific volume as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    specific volume
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - speedOfSoundPT
```
public double speedOfSoundPT(double pressure,
                    double temperature)
                      throws OutOfRangeException
```
    Speed of sound as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    speed of sound
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - surfaceTensionT
```
public double surfaceTensionT(double temperature)
                       throws OutOfRangeException
```
    Surface tension as a function of temperature.
    
    Parameters:
    temperature - temperature
    
    Returns:
    surface tension
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - temperatureHS
```
public double temperatureHS(double enthalpy,
                   double entropy)
                     throws OutOfRangeException
```
    Temperature. [IF97 Supplementary Release S04]
    
    Parameters:
    enthalpy - specific enthalpy
    entropy - specific entropy
    
    Returns:
    temperature
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - temperaturePH
```
public double temperaturePH(double pressure,
                   double enthalpy)
                     throws OutOfRangeException
```
    Temperature.
    
    Parameters:
    pressure - pressure [MPa]
    enthalpy - specific enthalpy [kJ/(kg)]
    
    Returns:
    temperature [K]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - temperaturePS
```
public double temperaturePS(double pressure,
                   double entropy)
                     throws OutOfRangeException
```
    Temperature.
    
    Parameters:
    pressure - pressure
    entropy - specific entropy
    
    Returns:
    temperature
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - thermalConductivityPH
```
public double thermalConductivityPH(double pressure,
                           double enthalpy)
                             throws OutOfRangeException
```
    Thermal conductivity as a function of pressure & specific enthalpy.
    
    Parameters:
    pressure - pressure
    enthalpy - specific enthalpy
    
    Returns:
    thermal conductivity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - thermalConductivityPT
```
public double thermalConductivityPT(double pressure,
                           double temperature)
                             throws OutOfRangeException
```
    Thermal conductivity as a function of pressure & temperature.
    
    Parameters:
    pressure - pressure
    temperature - temperature
    
    Returns:
    thermal conductivity
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - vapourFractionHS
```
public double vapourFractionHS(double enthalpy,
                      double entropy)
                        throws OutOfRangeException
```
    Vapour fraction as a function of specific enthalpy & specific entropy.
    
    Parameters:
    enthalpy - specific enthalpy
    entropy - specific entropy
    
    Returns:
    vapour fraction [-]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
  - vapourFractionPS
```
public double vapourFractionPS(double pressure,
                      double entropy)
                        throws OutOfRangeException
```
    Vapour fraction as a function of pressure & specific entropy.
    Note: for highest accuracy, use enthalpy to determine vapour fraction (vapourFractionHS(double, double)).
    
    Parameters:
    pressure - pressure
    entropy - specific entropy
    
    Returns:
    vapour fraction [-]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
    See Also:
    vapourFractionHS(double, double)
  - vapourFractionTS
```
public double vapourFractionTS(double temperature,
                      double entropy)
```
    Vapour fraction as a function of temperature & specific entropy.
    Note: whenever possible, use enthalpy to determine vapour fraction (vapourFractionHS(double, double)) for highest accuracy.
    
    Parameters:
    temperature - temperature
    entropy - specific entropy
    
    Returns:
    vapour fraction [-]
    
    Throws:
    
    OutOfRangeException - out-of-range exception
    See Also:
    vapourFractionHS(double, double)

Class IF97

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

UNIT_SYSTEM

R

Rm

M

Tc

pc

hc

sc

rhoc

BTU

ft

ft2

ft3

g

hr

in

in2

lb

lbf

psi

Ra

Constructor Detail

IF97

IF97

Method Detail

PrandtlHS

PrandtlPH

PrandtlPT

compressibilityHS

compressibilityPH

compressibilityPT

convertFromDefault

convertFromDefault

convertToDefault

densityPH

densityPT

dielectricConstantPH

dielectricConstantPT

dielectricConstantRhoT

dynamicViscosityPH

dynamicViscosityPT

dynamicViscosityRhoT

isobaricCubicExpansionCoefficientPH

isobaricCubicExpansionCoefficientPT

isobaricHeatCapacityPH

isobaricHeatCapacityPT

isochoricHeatCapacityPH

isochoricHeatCapacityPT

kinematicViscosityPH

kinematicViscosityPT

kinematicViscosityRhoT

partialDerivativePT

partialDerivativeRhoT

pressureHS

refractiveIndexPTLambda

refractiveIndexRhoTLambda

saturationPressureH

saturationPressureS

saturationPressureT

saturationTemperatureP

setUnitSystem

specificEnthalpyPS

specificEnthalpyPT

specificEnthalpyPX

specificEnthalpySaturatedLiquidP

specificEnthalpySaturatedLiquidT

specificEnthalpySaturatedVapourP

specificEnthalpySaturatedVapourT

specificEnthalpyTX

specificEntropyPH

specificEntropyPT

specificEntropyPX

specificEntropySaturatedLiquidP