Base class from which all pure substances are derived. More...

#include <Sub.h>

Inheritance diagram for Substance:

Detailed Description

Base class from which all pure substances are derived.

Definition at line 36 of file Sub.h.

Public Member Functions
void	setStdState (double h0=0.0, double s0=0.0, double t0=298.15, double p0=1.01325e5)
virtual double	Pp ()=0
double	hp ()
	Enthalpy of a single-phase state.
double	gp ()
	Gibbs function of a single-phase state.
double	prop (propertyFlag::type ijob)
void	set_TPp (double t0, double p0)
	set T and P
void	Set (PropertyPair::type XY, double x0, double y0)
	Function to set or change the state for a property pair XY where x0 is the value of first property and y0 is the value of the second property.
Information about a substance
virtual double	MolWt ()=0
	Molecular weight [kg/kmol].
virtual double	Tcrit ()=0
	Critical temperature [K].
virtual double	Pcrit ()=0
	Critical pressure [Pa].
virtual double	Vcrit ()=0
	Critical specific volume [m^3/kg].
virtual double	Tmin ()=0
	Minimum temperature for which the equation of state is valid.
virtual double	Tmax ()=0
	Maximum temperature for which the equation of state is valid.
const char *	name ()
	Name of the substance.
const char *	formula ()
	Chemical formula for the substance.
Properties
double	P ()
	Pressure [Pa].
double	Temp ()
	Temperature [K].
double	v ()
	Specific volume [m^3/kg].
double	u ()
	Internal energy [J/kg].
double	h ()
	Enthalpy [J/kg].
double	s ()
	Entropy [J/kg/K].
double	f ()
	Helmholtz function [J/kg].
double	g ()
	Gibbs function [J/kg].
virtual double	cv ()
	Specific heat at constant volume [J/kg/K].
virtual double	cp ()
	Specific heat at constant pressure [J/kg/K].
virtual double	thermalExpansionCoeff ()
virtual double	isothermalCompressibility ()
virtual double	internalPressure ()
	Internal pressure [Pa], evaluated as \( \pi_T = (\partial U / \partial V)_T \).
Saturation Properties
double	Ps ()
virtual double	dPsdT ()
	The derivative of the saturation pressure with respect to temperature.
double	Tsat (double p)
	Saturation temperature at pressure p.
double	x ()
	Vapor mass fraction.
int	TwoPhase (bool strict=false)
	Returns 1 if the current state is a liquid/vapor mixture, 0 otherwise.

Protected Member Functions
virtual double	ldens ()=0
virtual double	Psat ()=0
	Saturation pressure, Pa.
virtual double	up ()=0
	Internal energy of a single-phase state.
virtual double	sp ()=0
	Entropy of a single-phase state.
virtual int	ideal ()
double	vp ()
int	Lever (int itp, double sat, double val, propertyFlag::type ifunc)
	Uses the lever rule to set state in the dome.
void	update_sat ()
	Update saturated liquid and vapor densities and saturation pressure.

Protected Attributes
double	T = Undef
double	Rho = Undef
double	Tslast = Undef
double	Rhf = Undef
double	Rhv = Undef
double	Pst = Undef
double	m_energy_offset = 0.0
double	m_entropy_offset = 0.0
std::string	m_name
std::string	m_formula

Private Member Functions
void	set_Rho (double r0)
void	set_T (double t0)
void	set_v (double v0)
void	BracketSlope (double p)
double	vprop (propertyFlag::type ijob)
void	set_xy (propertyFlag::type if1, propertyFlag::type if2, double X, double Y, double atx, double aty, double rtx, double rty)

Private Attributes
int	kbr = 0
double	Vmin
double	Vmax
double	Pmin
double	Pmax
double	dvbf
double	dv
double	v_here
double	P_here

Member Function Documentation

◆ setStdState()

void setStdState	(	double	h0 = 0.0,
		double	s0 = 0.0,
		double	t0 = 298.15,
		double	p0 = 1.01325e5 )

Definition at line 26 of file Sub.cpp.

◆ MolWt()

virtual double MolWt ( )

pure virtual

Molecular weight [kg/kmol].

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ Tcrit()

virtual double Tcrit ( )

pure virtual

Critical temperature [K].

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ Pcrit()

virtual double Pcrit ( )

pure virtual

Critical pressure [Pa].

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ Vcrit()

virtual double Vcrit ( )

pure virtual

Critical specific volume [m^3/kg].

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ Tmin()

virtual double Tmin ( )

pure virtual

Minimum temperature for which the equation of state is valid.

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ Tmax()

virtual double Tmax ( )

pure virtual

Maximum temperature for which the equation of state is valid.

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ name()

const char * name ( )

inline

Name of the substance.

Definition at line 68 of file Sub.h.

◆ formula()

const char * formula ( )

inline

Chemical formula for the substance.

Definition at line 73 of file Sub.h.

◆ P()

double P ( )

Pressure [Pa].

If two phases are present, return the saturation pressure; otherwise return the pressure computed directly from the underlying eos.

Definition at line 37 of file Sub.cpp.

◆ Temp()

double Temp ( )

inline

Temperature [K].

Definition at line 88 of file Sub.h.

◆ v()

double v ( )

inline

Specific volume [m^3/kg].

Definition at line 93 of file Sub.h.

◆ u()

double u ( )

inline

Internal energy [J/kg].

Definition at line 98 of file Sub.h.

◆ h()

double h ( )

inline

Enthalpy [J/kg].

Definition at line 103 of file Sub.h.

◆ s()

double s ( )

inline

Entropy [J/kg/K].

Definition at line 108 of file Sub.h.

◆ f()

double f ( )

inline

Helmholtz function [J/kg].

Definition at line 113 of file Sub.h.

◆ g()

double g ( )

inline

Gibbs function [J/kg].

Definition at line 118 of file Sub.h.

◆ cv()

double cv ( )

virtual

Specific heat at constant volume [J/kg/K].

Definition at line 44 of file Sub.cpp.

◆ cp()

double cp ( )

virtual

Specific heat at constant pressure [J/kg/K].

Definition at line 82 of file Sub.cpp.

◆ thermalExpansionCoeff()

double thermalExpansionCoeff ( )

virtual

Definition at line 134 of file Sub.cpp.

◆ isothermalCompressibility()

double isothermalCompressibility ( )

virtual

Definition at line 187 of file Sub.cpp.

◆ internalPressure()

double internalPressure ( )

virtual

Internal pressure [Pa], evaluated as \( \pi_T = (\partial U / \partial V)_T \).

Definition at line 235 of file Sub.cpp.

◆ Ps()

double Ps ( )

Definition at line 504 of file Sub.cpp.

◆ dPsdT()

double dPsdT ( )

virtual

The derivative of the saturation pressure with respect to temperature.

Definition at line 254 of file Sub.cpp.

◆ Tsat()

double Tsat ( double p )

Saturation temperature at pressure p.

Definition at line 301 of file Sub.cpp.

◆ x()

double x ( )

Vapor mass fraction.

If T >= Tcrit, 0 is returned for v < Vcrit, and 1 is returned if v > Vcrit.

Definition at line 283 of file Sub.cpp.

◆ TwoPhase()

int TwoPhase ( bool strict = false )

Returns 1 if the current state is a liquid/vapor mixture, 0 otherwise.

By default, saturated vapor and saturated liquid are included; setting the flag strict to true will exclude the boundaries.

Definition at line 271 of file Sub.cpp.

◆ Pp()

virtual double Pp ( )

pure virtual

Implemented in CarbonDioxide, and Heptane.

◆ hp()

double hp ( )

inline

Enthalpy of a single-phase state.

Definition at line 161 of file Sub.h.

◆ gp()

double gp ( )

inline

Gibbs function of a single-phase state.

Definition at line 166 of file Sub.h.

◆ prop()

double prop ( propertyFlag::type ijob )

Definition at line 742 of file Sub.cpp.

◆ set_TPp()

void set_TPp	(	double	t0,
		double	p0 )

set T and P

Definition at line 787 of file Sub.cpp.

◆ Set()

void Set	(	PropertyPair::type	XY,
		double	x0,
		double	y0 )

Function to set or change the state for a property pair XY where x0 is the value of first property and y0 is the value of the second property.

Definition at line 352 of file Sub.cpp.

◆ ldens()

virtual double ldens ( )

protectedpure virtual

Implemented in CarbonDioxide, Heptane, hydrogen, methane, nitrogen, and oxygen.

◆ Psat()

virtual double Psat ( )

protectedpure virtual

Saturation pressure, Pa.

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ up()

virtual double up ( )

protectedpure virtual

Internal energy of a single-phase state.

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ sp()

virtual double sp ( )

protectedpure virtual

Entropy of a single-phase state.

Implemented in CarbonDioxide, Heptane, HFC134a, hydrogen, methane, nitrogen, oxygen, and water.

◆ ideal()

virtual int ideal ( )

inlineprotectedvirtual

Definition at line 203 of file Sub.h.

◆ vp()

double vp ( )

inlineprotected

Definition at line 207 of file Sub.h.

◆ Lever()

int Lever	(	int	itp,
		double	sat,
		double	val,
		propertyFlag::type	ifunc )

protected

Uses the lever rule to set state in the dome.

Returns 1 if in dome, 0 if not, in which case state not set.

Definition at line 596 of file Sub.cpp.

◆ update_sat()

void update_sat ( )

protected

Update saturated liquid and vapor densities and saturation pressure.

Definition at line 514 of file Sub.cpp.

◆ set_Rho()

void set_Rho ( double r0 )

private

Definition at line 476 of file Sub.cpp.

◆ set_T()

void set_T ( double t0 )

private

Definition at line 485 of file Sub.cpp.

◆ set_v()

void set_v ( double v0 )

private

Definition at line 494 of file Sub.cpp.

◆ BracketSlope()

void BracketSlope ( double p )

private

Definition at line 768 of file Sub.cpp.

◆ vprop()

double vprop ( propertyFlag::type ijob )

private

Definition at line 578 of file Sub.cpp.

◆ set_xy()

void set_xy	(	propertyFlag::type	if1,
		propertyFlag::type	if2,
		double	X,
		double	Y,
		double	atx,
		double	aty,
		double	rtx,
		double	rty )

private

Definition at line 639 of file Sub.cpp.

Member Data Documentation

◆ T

double T = Undef

protected

Definition at line 181 of file Sub.h.

◆ Rho

double Rho = Undef

protected

Definition at line 182 of file Sub.h.

◆ Tslast

double Tslast = Undef

protected

Definition at line 183 of file Sub.h.

◆ Rhf

double Rhf = Undef

protected

Definition at line 184 of file Sub.h.

◆ Rhv

double Rhv = Undef

protected

Definition at line 185 of file Sub.h.

◆ Pst

double Pst = Undef

protected

Definition at line 186 of file Sub.h.

◆ m_energy_offset

double m_energy_offset = 0.0

protected

Definition at line 187 of file Sub.h.

◆ m_entropy_offset

double m_entropy_offset = 0.0

protected

Definition at line 188 of file Sub.h.

◆ m_name

std::string m_name

protected

Definition at line 189 of file Sub.h.

◆ m_formula

std::string m_formula

protected

Definition at line 190 of file Sub.h.

◆ kbr

int kbr = 0

private

Definition at line 228 of file Sub.h.

◆ Vmin

double Vmin

private

Definition at line 229 of file Sub.h.

◆ Vmax

double Vmax

private

Definition at line 229 of file Sub.h.

◆ Pmin

double Pmin

private

Definition at line 230 of file Sub.h.

◆ Pmax

double Pmax

private

Definition at line 230 of file Sub.h.

◆ dvbf

double dvbf

private

Definition at line 231 of file Sub.h.

◆ dv

double dv

private

Definition at line 231 of file Sub.h.

◆ v_here

double v_here

private

Definition at line 232 of file Sub.h.

◆ P_here

double P_here

private

Definition at line 232 of file Sub.h.

The documentation for this class was generated from the following files:

Detailed Description

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Member Function Documentation

◆ setStdState()

◆ MolWt()

◆ Tcrit()

◆ Pcrit()

◆ Vcrit()

◆ Tmin()

◆ Tmax()

◆ name()

◆ formula()

◆ P()

◆ Temp()

◆ v()

◆ u()

◆ h()

◆ s()

◆ f()

◆ g()

◆ cv()

◆ cp()

◆ thermalExpansionCoeff()

◆ isothermalCompressibility()

◆ internalPressure()

◆ Ps()

◆ dPsdT()

◆ Tsat()

◆ x()

◆ TwoPhase()

◆ Pp()

◆ hp()

◆ gp()

◆ prop()

◆ set_TPp()

◆ Set()

◆ ldens()

◆ Psat()

◆ up()

◆ sp()

◆ ideal()

◆ vp()

◆ Lever()

◆ update_sat()

◆ set_Rho()

◆ set_T()

◆ set_v()

◆ BracketSlope()

◆ vprop()

◆ set_xy()

Member Data Documentation

◆ T

◆ Rho

◆ Tslast

◆ Rhf

◆ Rhv

◆ Pst

◆ m_energy_offset

◆ m_entropy_offset

◆ m_name

◆ m_formula

◆ kbr

◆ Vmin

◆ Vmax

◆ Pmin

◆ Pmax

◆ dvbf

◆ dv

◆ v_here

◆ P_here