Class PhaseSpanWagnerEos

java.lang.Object
neqsim.thermo.phase.Phase
neqsim.thermo.phase.PhaseEos
neqsim.thermo.phase.PhaseSpanWagnerEos
All Implemented Interfaces:
Serializable, Cloneable, PhaseEosInterface, PhaseInterface, ThermodynamicConstantsInterface
public class PhaseSpanWagnerEos extends PhaseEos
Phase implementation using the Span-Wagner reference equation for CO2.
Author:
esol
See Also:

  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      See Also:

    • enthalpy

      private double enthalpy

    • entropy

      private double entropy

    • gibbsEnergy

      private double gibbsEnergy

    • cp

      private double cp

    • cv

      private double cv

    • internalEnergy

      private double internalEnergy

    • soundSpeed

      private double soundSpeed

    • molarDensity

      private double molarDensity

    • jouleThomson

      private double jouleThomson

    • cachedTemperature

      private transient double cachedTemperature

    • cachedPressure

      private transient double cachedPressure

    • propertiesCalculated

      private transient boolean propertiesCalculated

  • Constructor Details

    • PhaseSpanWagnerEos

      public PhaseSpanWagnerEos()

      Constructor for PhaseSpanWagnerEos.

  • Method Details

    • clone

      public PhaseSpanWagnerEos clone()

      clone.

      Specified by:
      clone in interface PhaseInterface
      Overrides:
      clone in class PhaseEos
      Returns:
      a PhaseInterface object

    • addComponent

      public void addComponent(String name, double moles, double molesInPhase, int compNumber)

      Add component to component array and update moles variables.

      Parameters:
      name - Name of component.
      moles - Total number of moles of component.
      molesInPhase - Number of moles in phase.
      compNumber - Index number of component in phase object component array.

    • init

      public void init(double totalNumberOfMoles, int numberOfComponents, int initType, PhaseType pt, double beta)

      init.

      initType used in component.init()

      Calls component.init(initType)

      Specified by:
      init in interface PhaseInterface
      Overrides:
      init in class PhaseEos
      Parameters:
      totalNumberOfMoles - Total number of moles in all phases of Stream.
      numberOfComponents - Number of components in system.
      initType - a int. Use 0 to init, and 1 to reset.
      pt - Type of phase.
      beta - Mole fraction of this phase in system.

    • hasStateChanged

      private boolean hasStateChanged()
      Check if the thermodynamic state (T, P) has changed since last calculation.
      Returns:
      true if state has changed, false if unchanged

    • cacheCurrentState

      private void cacheCurrentState()
      Cache the current thermodynamic state for change detection.

    • invalidateCache

      public void invalidateCache()
      Invalidate the cached state, forcing recalculation on next init.

    • getGibbsEnergy

      public double getGibbsEnergy()

      getGibbsEnergy.

      Specified by:
      getGibbsEnergy in interface PhaseInterface
      Overrides:
      getGibbsEnergy in class Phase
      Returns:
      a double

    • getZ

      public double getZ()

      getZ.

      Specified by:
      getZ in interface PhaseInterface
      Overrides:
      getZ in class Phase
      Returns:
      a double

    • getEnthalpy

      public double getEnthalpy()
      method to return enthalpy of a phase in unit Joule.
      Specified by:
      getEnthalpy in interface PhaseInterface
      Overrides:
      getEnthalpy in class Phase
      Returns:
      a double

    • getEntropy

      public double getEntropy()
      method to return entropy of the phase.
      Specified by:
      getEntropy in interface PhaseInterface
      Overrides:
      getEntropy in class Phase
      Returns:
      a double

    • getInternalEnergy

      public double getInternalEnergy()

      getInternalEnergy.

      Specified by:
      getInternalEnergy in interface PhaseInterface
      Overrides:
      getInternalEnergy in class Phase
      Returns:
      a double

    • getCp

      public double getCp()
      method to return specific heat capacity (Cp).
      Specified by:
      getCp in interface PhaseInterface
      Overrides:
      getCp in class Phase
      Returns:
      Cp in unit J/K

    • getCv

      public double getCv()
      method to return specific heat capacity (Cv).
      Specified by:
      getCv in interface PhaseInterface
      Overrides:
      getCv in class Phase
      Returns:
      Cv in unit J/K

    • getSoundSpeed

      public double getSoundSpeed()
      Get the speed of sound of a phase note: implemented in phaseEos.
      Specified by:
      getSoundSpeed in interface PhaseInterface
      Overrides:
      getSoundSpeed in class PhaseEos
      Returns:
      speed of sound in m/s

    • getJouleThomsonCoefficient

      public double getJouleThomsonCoefficient()
      Get the Joule Thomson Coefficient of a phase.
      Specified by:
      getJouleThomsonCoefficient in interface PhaseInterface
      Overrides:
      getJouleThomsonCoefficient in class PhaseEos
      Returns:
      Joule Thomson coefficient in K/bar

    • getDensity

      public double getDensity()
      Get density of a phase note: does not use Peneloux volume correction.
      Specified by:
      getDensity in interface PhaseInterface
      Overrides:
      getDensity in class Phase
      Returns:
      density with unit kg/m3

    • getDensity

      public double getDensity(String unit)
      Get density of a fluid note: with Peneloux volume correction.

      Returns the density calculated directly from Span-Wagner equation of state.

      Specified by:
      getDensity in interface PhaseInterface
      Overrides:
      getDensity in class Phase
      Parameters:
      unit - Supported units are kg/m3, mol/m3
      Returns:
      density in specified unit

    • molarVolume

      public double molarVolume(double pressure, double temperature, double A, double B, PhaseType pt)
      Description copied from class: PhaseEos

      molarVolume.

      Specified by:
      molarVolume in interface PhaseInterface
      Overrides:
      molarVolume in class PhaseEos
      Parameters:
      pressure - a double
      temperature - a double
      A - a double
      B - a double
      pt - the PhaseType of the phase
      Returns:
      a double