SteamSystemModelerTool Class Reference

Classes
struct	FluidProperties
struct	SaturatedPropertiesOutput
struct	SteamPropertiesOutput

Public Types
enum class	Key { ENTHALPY , ENTROPY }
enum class	Region { REGION1 , REGION2A , REGION2B , REGION2C }

Static Private Member Functions
static int	regionSelect (double pressure, double temperature)
static SteamPropertiesOutput	region1 (double temperature, double pressure)
static SteamPropertiesOutput	region2 (double temperature, double pressure)
static SteamPropertiesOutput	region3 (double temperature, double pressure)
static SteamPropertiesOutput	region3Density (double density, double temperature)
static double	region4 (double temperature)
static double	backwardPressureEnthalpyRegion1 (double pressure, double enthalpy)
static double	backwardPressureEnthalpyRegion2A (double pressure, double enthalpy)
static double	backwardPressureEnthalpyRegion2B (double pressure, double enthalpy)
static double	backwardPressureEnthalpyRegion2C (double pressure, double enthalpy)
static double	backwardPressureEntropyRegion2A (double pressure, double entropy)
static double	backwardPressureEntropyRegion2B (double pressure, double entropy)
static double	backwardPressureEntropyRegion2C (double pressure, double entropy)
static double	backwardPressureEntropyRegion1 (double pressure, double entropy)
static Point	generatePoint (int region, SteamSystemModelerTool::Key key, double var1, double var2)
static double	linearTestPoint (double X, Point point1, Point point2)
static double	backwardRegion3Exact (double pressure, double X, SteamSystemModelerTool::Key key)
static double	backwardPressureEnthalpyRegion3 (double pressure, double enthalpy)
static double	backwardPressureEntropyRegion3 (double pressure, double entropy)
static double	backwardPressureEnthalpyRegion1Exact (double pressure, double enthalpy)
static double	backwardPressureEntropyRegion1Exact (double pressure, double entropy)
static double	backwardPressureEnthalpyRegion2AExact (double pressure, double enthalpy)
static double	backwardPressureEntropyRegion2AExact (double pressure, double entropy)
static double	backwardPressureEnthalpyRegion2BExact (double pressure, double enthalpy)
static double	backwardPressureEntropyRegion2BExact (double pressure, double entropy)
static double	backwardPressureEnthalpyRegion2CExact (double pressure, double enthalpy)
static double	backwardPressureEntropyRegion2CExact (double pressure, double entropy)
static double	backwardExact (int region, SteamSystemModelerTool::Key key, SteamSystemModelerTool::Region regionFunction, double pressure, double var2)
static double	boundaryByTemperatureRegion3to2 (const double t)
static double	boundaryByPressureRegion3to2 (const double p)

Static Private Attributes
static constexpr double	PRESSURE_MIN = 0.01
static constexpr double	TEMPERATURE_MIN = 273.15
static constexpr double	PRESSURE_Tp = 16.5291643
static constexpr double	TEMPERATURE_Tp = 623.15
static constexpr double	PRESSURE_CRIT = 22.064
static constexpr double	TEMPERATURE_CRIT = 647.096
static constexpr double	PRESSURE_MAX = 100
static constexpr double	TEMPERATURE_MAX = 1073.15
static constexpr double	TEMPERATURE_REGION3_MAX = 863.15

Friends
class	SteamProperties
class	SaturatedProperties

Detailed Description

Definition at line 21 of file SteamSystemModelerTool.h.

Member Enumeration Documentation

Key

enum class SteamSystemModelerTool::Key

strong

Definition at line 119 of file SteamSystemModelerTool.h.

Region

enum class SteamSystemModelerTool::Region

strong

Definition at line 121 of file SteamSystemModelerTool.h.

Member Function Documentation

backwardExact()

static double SteamSystemModelerTool::backwardExact ( int  region, SteamSystemModelerTool::Key  key, SteamSystemModelerTool::Region  regionFunction, double  pressure, double  var2  )

staticprivate

Uses linear extrapolation for estimate equation to determine much more accurate temperature

Parameters

region	int, region number
key	Key, value type like ENTROPY ot ENTHALPY
regionFunction	Region, the region of which function to be used (REGION1, REGION2A, etc)
pressure	double, pressure in MPa
var2	double, value of either entropy (in kJ/kg/K) or enthalpy (in kJ/kg)

Returns

double, temperature in Kelvin

backwardPressureEnthalpyRegion1()

static double SteamSystemModelerTool::backwardPressureEnthalpyRegion1 ( double  pressure, double  enthalpy  )

staticprivate

Calculates temperature based in pressure and enthalpy for region 1

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg

Returns

double, temperature in Kelvins

backwardPressureEnthalpyRegion2A()

static double SteamSystemModelerTool::backwardPressureEnthalpyRegion2A ( double  pressure, double  enthalpy  )

staticprivate

Calculates temperature based in pressure and enthalpy for region 2A

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg

Returns

double, temperature in Kelvins

backwardPressureEnthalpyRegion2AExact()

static double SteamSystemModelerTool::backwardPressureEnthalpyRegion2AExact ( double  pressure, double  enthalpy  )

staticprivate

Returns a more accurate temperature than backwardPressureEnthalpyRegion2A

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg

Returns

double, temperature in Kelvin

backwardPressureEnthalpyRegion2B()

static double SteamSystemModelerTool::backwardPressureEnthalpyRegion2B ( double  pressure, double  enthalpy  )

staticprivate

Calculates temperature based in pressure and enthalpy for region 2B

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg

Returns

double, temperature in Kelvins

backwardPressureEnthalpyRegion2BExact()

static double SteamSystemModelerTool::backwardPressureEnthalpyRegion2BExact ( double  pressure, double  enthalpy  )

staticprivate

Returns a more accurate temperature than backwardPressureEnthalpyRegion2B

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg

Returns

double, temperature in Kelvin

backwardPressureEnthalpyRegion2C()

static double SteamSystemModelerTool::backwardPressureEnthalpyRegion2C ( double  pressure, double  enthalpy  )

staticprivate

Calculates temperature based in pressure and enthalpy for region 2C

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg

Returns

double, temperature in Kelvins

backwardPressureEnthalpyRegion2CExact()

static double SteamSystemModelerTool::backwardPressureEnthalpyRegion2CExact ( double  pressure, double  enthalpy  )

staticprivate

Returns a more accurate temperature than backwardPressureEnthalpyRegion2C

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg

Returns

double, temperature in Kelvin

backwardPressureEnthalpyRegion3()

static double SteamSystemModelerTool::backwardPressureEnthalpyRegion3 ( double  pressure, double  enthalpy  )

staticprivate

Uses linear interpolation to goal seek region 3 using pressure and enthalpy

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg

Returns

double, temperature in Kelvins

backwardPressureEntropyRegion1()

static double SteamSystemModelerTool::backwardPressureEntropyRegion1 ( double  pressure, double  entropy  )

staticprivate

Calculates temperature based on pressure and entropy for region 1

Parameters

pressure	double, pressure in MPa
entropy	double, specific entropy in kJ/kg/K

Returns

double, temperature in Kelvins

backwardPressureEntropyRegion2A()

static double SteamSystemModelerTool::backwardPressureEntropyRegion2A ( double  pressure, double  entropy  )

staticprivate

Calculates temperature based on pressure and entropy for region 2A

Parameters

pressure	double, pressure in MPa
entropy	double, specific entropy in kJ/kg/K

Returns

double, temperature in Kelvins

backwardPressureEntropyRegion2AExact()

static double SteamSystemModelerTool::backwardPressureEntropyRegion2AExact ( double  pressure, double  entropy  )

staticprivate

Returns a more accurate temperature than backwardPressureEntropyRegion2A

Parameters

pressure	double, pressure in MPa
entropy	double, specific entropy in kJ/kg/K

Returns

double, temperature in Kelvin

backwardPressureEntropyRegion2B()

static double SteamSystemModelerTool::backwardPressureEntropyRegion2B ( double  pressure, double  entropy  )

staticprivate

Calculates temperature based on pressure and entropy for region 2B

Parameters

pressure	double, pressure in MPa
entropy	double, specific entropy in kJ/kg/K

Returns

double, temperature in Kelvins

backwardPressureEntropyRegion2BExact()

static double SteamSystemModelerTool::backwardPressureEntropyRegion2BExact ( double  pressure, double  entropy  )

staticprivate

Returns a more accurate temperature than backwardPressureEntropyRegion2B

Parameters

pressure	double, pressure in MPa
entropy	double, specific entropy in kJ/kg/K

Returns

double, temperature in Kelvin

backwardPressureEntropyRegion2C()

static double SteamSystemModelerTool::backwardPressureEntropyRegion2C ( double  pressure, double  entropy  )

staticprivate

Calculates temperature based on pressure and entropy for region 2C

Parameters

pressure	double, pressure in MPa
entropy	double, specific entropy in kJ/kg/K

Returns

double, temperature in Kelvins

backwardPressureEntropyRegion2CExact()

static double SteamSystemModelerTool::backwardPressureEntropyRegion2CExact ( double  pressure, double  entropy  )

staticprivate

Returns a more accurate temperature than backwardPressureEntropyRegion2C

Parameters

pressure	double, pressure in MPa
entropy	double, specific entropy in kJ/kg/K

Returns

double, temperature in Kelvin

backwardPressureEntropyRegion3()

static double SteamSystemModelerTool::backwardPressureEntropyRegion3 ( double  pressure, double  entropy  )

staticprivate

Uses linear interpolation to goal seek region 3 using pressure and entropy

Parameters

pressure	double, pressure in MPa
enthalpy	double, specific enthalpy in kJ/kg
entropy	double, specific entropy in kJ/kg/K

Returns

double, temperature in Kelvins

boundaryByPressureRegion3to2()

static double SteamSystemModelerTool::boundaryByPressureRegion3to2 ( const double  p )

inlinestaticprivate

Calculates the boundary temperature associated with the given pressure

Parameters

p	double, pressure in MPa

Returns

double, temperature in Kelvins

Definition at line 422 of file SteamSystemModelerTool.h.

boundaryByTemperatureRegion3to2()

static double SteamSystemModelerTool::boundaryByTemperatureRegion3to2 ( const double  t )

inlinestaticprivate

Calculates the boundary pressure associated with the given temperature

Parameters

t	double, temperature in Kelvins

Returns

double, pressure in MPa

Definition at line 411 of file SteamSystemModelerTool.h.

generatePoint()

static Point SteamSystemModelerTool::generatePoint ( int  region, SteamSystemModelerTool::Key  key, double  var1, double  var2  )

staticprivate

Generates a data point

Parameters

region	int, region of substance
key	string, property such as specificEnthalpy or specificEntropy
var1	double, first value
var2	double, second value

Returns

Point, a point with x-value and y-value

linearTestPoint()

static double SteamSystemModelerTool::linearTestPoint ( double  X, Point  point1, Point  point2  )

staticprivate

Uses linear extrapolation to determine the location of X relative to both points

Parameters

X	double, x-value
point1	Point, the first point
point2	Point, the second point

Returns

double, y-value

region1()

static SteamPropertiesOutput SteamSystemModelerTool::region1 ( double  temperature, double  pressure  )

staticprivate

Calculates the steam properties using region 1 equations

Parameters

temperature	double, temperature in Kelvin
pressure	double, pressure in MPa

Returns

SteamPropertiesOutput, steam properties

region2()

static SteamPropertiesOutput SteamSystemModelerTool::region2 ( double  temperature, double  pressure  )

staticprivate

Calculates the steam properties using region 2 equations

Parameters

temperature	double, temperature in Kelvin
pressure	double, pressure in MPa

Returns

SteamProperties::Output, steam properties

region3()

static SteamPropertiesOutput SteamSystemModelerTool::region3 ( double  temperature, double  pressure  )

staticprivate

Calculates the steam properties using region 3 equations

Parameters

temperature	double, temperature in Kelvin
pressure	double, pressure in MPa

Returns

SteamProperties::Output, steam properties

region4()

static double SteamSystemModelerTool::region4 ( double  temperature )

staticprivate

Calculates the steam properties using region 4 equations (saturated properties)

Parameters

temperature	double, temperature in Kelvin
pressure	double, pressure in MPa

Returns

SteamProperties::Output, steam properties

regionSelect()

static int SteamSystemModelerTool::regionSelect ( double  pressure, double  temperature  )

staticprivate

Determines the IAPWS region based on pressure and temperature

Parameters

pressure	double, pressure in MPa
temperature	double, temperature in Kelvins

Returns

int, region number

Friends And Related Symbol Documentation

SaturatedProperties

friend class SaturatedProperties

friend

Definition at line 427 of file SteamSystemModelerTool.h.

SteamProperties

friend class SteamProperties

friend

Definition at line 426 of file SteamSystemModelerTool.h.

Member Data Documentation

PRESSURE_CRIT

constexpr double SteamSystemModelerTool::PRESSURE_CRIT = 22.064

staticconstexprprivate

Critical Pressure of Water MPa

Definition at line 383 of file SteamSystemModelerTool.h.

PRESSURE_MAX

constexpr double SteamSystemModelerTool::PRESSURE_MAX = 100

staticconstexprprivate

Maximum Pressure of Water MPa

Definition at line 393 of file SteamSystemModelerTool.h.

PRESSURE_MIN

constexpr double SteamSystemModelerTool::PRESSURE_MIN = 0.01

staticconstexprprivate

Minimum Pressure of Water MPa

Definition at line 365 of file SteamSystemModelerTool.h.

PRESSURE_Tp

constexpr double SteamSystemModelerTool::PRESSURE_Tp = 16.5291643

staticconstexprprivate

Pressure of Water where ALL regions meet MPa

Definition at line 373 of file SteamSystemModelerTool.h.

TEMPERATURE_CRIT

constexpr double SteamSystemModelerTool::TEMPERATURE_CRIT = 647.096

staticconstexprprivate

Critical Temperature of Water K

Definition at line 388 of file SteamSystemModelerTool.h.

TEMPERATURE_MAX

constexpr double SteamSystemModelerTool::TEMPERATURE_MAX = 1073.15

staticconstexprprivate

Maximum Temperature of Water K

Definition at line 398 of file SteamSystemModelerTool.h.

TEMPERATURE_MIN

constexpr double SteamSystemModelerTool::TEMPERATURE_MIN = 273.15

staticconstexprprivate

Minimum Temperature of Water K

Definition at line 369 of file SteamSystemModelerTool.h.

TEMPERATURE_REGION3_MAX

constexpr double SteamSystemModelerTool::TEMPERATURE_REGION3_MAX = 863.15

staticconstexprprivate

Maximum Temperature of Water for Region 3 MPa

Definition at line 403 of file SteamSystemModelerTool.h.

TEMPERATURE_Tp

constexpr double SteamSystemModelerTool::TEMPERATURE_Tp = 623.15

staticconstexprprivate

Temperature of Water where ALL regions meet; K

Definition at line 378 of file SteamSystemModelerTool.h.

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

• include/steamModeler/SteamSystemModelerTool.h