nce.phprop.eosgas

Class GasEos

java.lang.Object

nce.base.PropertyEquation

nce.phprop.eosgas.GasEos

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

GasEosIdeal, GasEosPR, GasEosRK, GasEosSRK, GasEosVDW, GasEosVirial

public abstract class GasEos
extends PropertyEquation

Equation of state object. It is associated to a chemical species or to a mixture and provides methods to evaluate one state variable given the others for that specific species or mixture

Version:

20160212

Author:

Carlo Tegano

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GasEos()

Method Summary

Methods

Modifier and Type	Method and Description
double	evalFugacityCoefficientL(double P0, double P, double firstPsat, double T) Evaluate compressed liquid fugacity coefficient
double	evalFugacityCoefficientV(double P0, double P, double T) Evaluates pure species vapor phase fugacity coefficient
double	evalFugacityL(double P0, double P, double firstPsat, double T)
double	evalFugacityV(double P0, double P, double T) Evaluates pure species vapor phase fugacity
abstract double	evalLiquidVolume(double P, double T) Evaluates liquid molar volume with eos.
abstract double	evalPressure(double V, double T) Evalutes fluid pressure with eos.
double	evalResidualEnthalpyL(double P0, double P, double T)
double	evalResidualEnthalpyV(double P0, double P, double T) Evaluates vapor phase residual entropy from the definition
double	evalResidualEntropyL(double P0, double P, double T)
double	evalResidualEntropyV(double P0, double P, double T) Evaluates vapor phase residual entropy by numerical differentiation of the equation of state at constant pressure.
double	evalResidualGibbsFreeEnergyL(double P0, double P, double T) Not implemented.
double	evalResidualGibbsFreeEnergyV(double P0, double P, double T) Evaluates vapor phase residual Gibbs free energy by numerical integration of the equation of state at constant temperature.
double	evalResidualInternalEnergyV(double P0, double P, double T)
double	evalSatPressure(double T, double firstPsat) Evaluates fluid vapor pressure by Maxwell's rule
abstract double	evalTemperature(double P, double V) Evaluates fluid temperature with eos.
abstract double	evalVaporVolume(double P, double T) Evaluates vapor molar volume with eos.
double	evalZ() An alias for evalZv
double	evalZl() Calculates liquid phase compressibility factor Z with previously setted state variables P, Vl,T
double	evalZl(double P, double T)
double	evalZv() Calculates vapor phase compressibility factor Z with previously setted state variables P, Vv, T
double	evalZv(double P, double T)
double	getP()
double	getPsat()
double	getT()
double	getVl()
double	getVv()
boolean	isConsistent(double p, double v, double t) Checks if state variables are all consistent with the eos
void	setP(double p)
void	setPsat(double psat)
void	setT(double t)
void	setVl(double vl)
void	setVv(double vv)

Methods inherited from class nce.base.PropertyEquation

applyMixRule, getConvAdd, getConvFact, getDescription, getFixedValue, getInputRanges, getLabel, getOutputRanges, getPar, getStatus, setConvAdd, setConvFact, setDescription, setFixedValue, setLabel, setPar, setParameterByIndex, toStringSummary

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GasEos

public GasEos()

Method Detail

evalTemperature

public abstract double evalTemperature(double P,
                     double V)

Evaluates fluid temperature with eos.

Parameters:

P -

V -

Returns:

T

evalPressure

public abstract double evalPressure(double V,
                  double T)

Evalutes fluid pressure with eos.

Parameters:

V -

T -

Returns:

P

evalVaporVolume

public abstract double evalVaporVolume(double P,
                     double T)

Evaluates vapor molar volume with eos.

Parameters:

P -

T -

Returns:

Vapor molar volume

evalLiquidVolume

public abstract double evalLiquidVolume(double P,
                      double T)

Evaluates liquid molar volume with eos.

Parameters:

P -

T -

Returns:

Liquid molar volume

evalSatPressure

public double evalSatPressure(double T,
                     double firstPsat)

Evaluates fluid vapor pressure by Maxwell's rule

Parameters:

T - saturation temperature

firstPsat - First guess for the iterative procedure (used only if the automatic one fails)

Returns:

Psat saturation pressure Psat(T)

evalResidualGibbsFreeEnergyV

public double evalResidualGibbsFreeEnergyV(double P0,
                                  double P,
                                  double T)

Evaluates vapor phase residual Gibbs free energy by numerical integration of the equation of state at constant temperature.

Parameters:

P0 - reference pressure, normally 0

P - system pressure

T - system temperature

evalResidualGibbsFreeEnergyL

public double evalResidualGibbsFreeEnergyL(double P0,
                                  double P,
                                  double T)

Not implemented. Evaluates liquid phase residual Gibbs free energy by numerical integration of the equation of state at constant temperature

Parameters:

P0 - reference pressure, normally 0

P - system pressure

T - system temperature

evalResidualEntropyV

public double evalResidualEntropyV(double P0,
                          double P,
                          double T)

Evaluates vapor phase residual entropy by numerical differentiation of the equation of state at constant pressure.

Parameters:

P0 - reference pressure, normally 0

P - system pressure

T - system temperature

evalResidualEntropyL

public double evalResidualEntropyL(double P0,
                          double P,
                          double T)

evalResidualEnthalpyV

public double evalResidualEnthalpyV(double P0,
                           double P,
                           double T)

Evaluates vapor phase residual entropy from the definition

Parameters:

P0 - reference pressure, normally 0

P - system pressure

T - system temperature

evalResidualEnthalpyL

public double evalResidualEnthalpyL(double P0,
                           double P,
                           double T)

evalResidualInternalEnergyV

public double evalResidualInternalEnergyV(double P0,
                                 double P,
                                 double T)

evalFugacityCoefficientV

public double evalFugacityCoefficientV(double P0,
                              double P,
                              double T)

Evaluates pure species vapor phase fugacity coefficient

Parameters:

P0 - reference pressure, normally 0

P - system pressure

T - system temperature

Returns:

gamma fugacity coefficient

evalFugacityV

public double evalFugacityV(double P0,
                   double P,
                   double T)

Evaluates pure species vapor phase fugacity

Parameters:

P0 - reference pressure, normally 0

P - system pressure

T - system temperature

Returns:

gamma fugacity

evalFugacityCoefficientL

public double evalFugacityCoefficientL(double P0,
                              double P,
                              double firstPsat,
                              double T)

Evaluate compressed liquid fugacity coefficient

Parameters:

P0 - reference pressure, in this case P0 = Psat

P - system pressure

firstPsat - first guess for saturation pressure iterative calculation only used if automatic guess fails

T - system temperature

Returns:

f fugacity coefficient

evalFugacityL

public double evalFugacityL(double P0,
                   double P,
                   double firstPsat,
                   double T)

evalZv

public double evalZv(double P,
            double T)

evalZl

public double evalZl(double P,
            double T)

evalZv

public double evalZv()

Calculates vapor phase compressibility factor Z with previously setted state variables P, Vv, T

Returns:

compressibility factor of vapor

evalZl

public double evalZl()

Calculates liquid phase compressibility factor Z with previously setted state variables P, Vl,T

Returns:

compressibility factor of liquid

evalZ

public double evalZ()

An alias for evalZv

Returns:

compresibility factor

isConsistent

public boolean isConsistent(double p,
                   double v,
                   double t)

Checks if state variables are all consistent with the eos

Parameters:

p - pressure [Pa]

v - colume [m3/mol]

t - temperature [K]

Returns:

true if pressure, volume and temperature are consistent

setPsat

public void setPsat(double psat)

getPsat

public double getPsat()

getT

public double getT()

setT

public void setT(double t)

getP

public double getP()

setP

public void setP(double p)

getVv

public double getVv()

setVv

public void setVv(double vv)

getVl

public double getVl()

setVl

public void setVl(double vl)