Package Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions
Functions to find the current region for given pairs of input variables

Information

Package description

Package Regions contains a large number of auxiliary functions which are needed to compute the current region of the IAPWS/IF97 for a given pair of input variables as quickly as possible. The focus of this implementation was on computational efficiency, not on compact code. Many of the function values calculated in these functions could be obtained using the fundamental functions of IAPWS/IF97, but with considerable overhead. If the region of IAPWS/IF97 is known in advance, the input variable mode can be set to the region, then the somewhat costly region checks are omitted. The checking for the phase has to be done outside the region functions because many properties are not differentiable at the region boundary. If the input phase is 2, the output region will be set to 4 immediately.

Package contents

The main 4 functions in this package are the functions returning the appropriate region for two input variables.

In addition, functions of the boiling and condensation curves compute the specific enthalpy, specific entropy, or density on these curves. The functions for the saturation pressure and temperature are included in the package Basic because they are part of the original IAPWS/IF97 standards document. These functions are also aliased to be used directly from package Water.

All other functions are auxiliary functions called from the region functions to check a specific boundary.

Version Info and Revision history

Authors: Hubertus Tummescheit, Jonas Eborn and Falko Jens Wagner
Modelon AB
Ideon Science Park
SE-22370 Lund, Sweden
email: hubertus@modelon.se

Extends from Modelica.​Icons.​FunctionsPackage (Icon for packages containing functions).

Package Contents

NameDescription
boilingcurve_pProperties on the boiling curve
boundary23ofpBoundary function for region boundary between regions 2 and 3 (input pressure)
boundary23ofTBoundary function for region boundary between regions 2 and 3 (input temperature)
d1nDensity in region 1 as function of p and T
d2nDensity in region 2 as function of p and T
dewcurve_pProperties on the dew curve
dhl_dpDerivative of liquid specific enthalpy on the boundary between regions 4 and 3 or 1 w.r.t. pressure
dhot1ofpDensity at upper temperature limit of region 1
dhv_dpDerivative of vapour specific enthalpy on the boundary between regions 4 and 3 or 1 w.r.t. pressure
drhol_dpDerivative of density of saturated water w.r.t. pressure
drhov_dpDerivative of density of saturated steam w.r.t. pressure
drhovl_dp 
dupper1ofTDensity at upper pressure limit of region 1
hl_pLiquid specific enthalpy on the boundary between regions 4 and 3 or 1
hl_p_R4bExplicit approximation of liquid specific enthalpy on the boundary between regions 4 and 3
hlowerofp1Explicit lower specific enthalpy limit of region 1 as function of pressure
hlowerofp2Explicit lower specific enthalpy limit of region 2 as function of pressure (meets region 4 saturation pressure curve at 623.15 K)
hlowerofp5Explicit lower specific enthalpy limit of region 5 as function of pressure
hupperofp1Explicit upper specific enthalpy limit of region 1 as function of pressure (meets region 4 saturation pressure curve at 623.15 K)
hupperofp2Explicit upper specific enthalpy limit of region 2 as function of pressure
hupperofp5Explicit upper specific enthalpy limit of region 5 as function of pressure
hv_pVapour specific enthalpy on the boundary between regions 4 and 3 or 2
hv_p_R4bExplicit approximation of vapour specific enthalpy on the boundary between regions 4 and 3
hvl_dpDerivative function for the specific enthalpy along the phase boundary
hvl_p 
hvl_p_derDerivative function for the specific enthalpy along the phase boundary
region_dTReturn the current region (valid values: 1,2,3,4,5) in IF97, given density and temperature
region_phReturn the current region (valid values: 1,2,3,4,5) in IF97 for given pressure and specific enthalpy
region_psReturn the current region (valid values: 1,2,3,4,5) in IF97 for given pressure and specific entropy
region_pTReturn the current region (valid values: 1,2,3,5) in IF97, given pressure and temperature
rhol_pDensity of saturated water
rhol_p_R4bExplicit approximation of liquid density on the boundary between regions 4 and 3
rhol_TDensity of saturated water
rhov_pDensity of saturated vapour
rhov_p_R4bExplicit approximation of vapour density on the boundary between regions 4 and 2
rhov_TDensity of saturated vapour
rhovl_p 
rhovl_p_der 
sl_pLiquid specific entropy on the boundary between regions 4 and 3 or 1
sl_p_R4bExplicit approximation of liquid specific entropy on the boundary between regions 4 and 3
slowerofp1Explicit lower specific entropy limit of region 1 as function of pressure
slowerofp2Explicit lower specific entropy limit of region 2 as function of pressure (meets region 4 saturation pressure curve at 623.15 K)
slowerofp5Explicit lower specific entropy limit of region 5 as function of pressure
supperofp1Explicit upper specific entropy limit of region 1 as function of pressure (meets region 4 saturation pressure curve at 623.15 K)
supperofp2Explicit upper specific entropy limit of region 2 as function of pressure
supperofp5Explicit upper specific entropy limit of region 5 as function of pressure
sv_pVapour specific entropy on the boundary between regions 4 and 3 or 2
sv_p_R4bExplicit approximation of vapour specific entropy on the boundary between regions 4 and 3

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​boundary23ofT
Boundary function for region boundary between regions 2 and 3 (input temperature)

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
TemperaturetTemperature (K)

Outputs

TypeNameDescription
PressurepPressure

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​boundary23ofp
Boundary function for region boundary between regions 2 and 3 (input pressure)

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
TemperaturetTemperature (K)

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hlowerofp5
Explicit lower specific enthalpy limit of region 5 as function of pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hupperofp5
Explicit upper specific enthalpy limit of region 5 as function of pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​slowerofp5
Explicit lower specific entropy limit of region 5 as function of pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​supperofp5
Explicit upper specific entropy limit of region 5 as function of pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hlowerofp1
Explicit lower specific enthalpy limit of region 1 as function of pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hupperofp1
Explicit upper specific enthalpy limit of region 1 as function of pressure (meets region 4 saturation pressure curve at 623.15 K)

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​slowerofp1
Explicit lower specific entropy limit of region 1 as function of pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​supperofp1
Explicit upper specific entropy limit of region 1 as function of pressure (meets region 4 saturation pressure curve at 623.15 K)

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hlowerofp2
Explicit lower specific enthalpy limit of region 2 as function of pressure (meets region 4 saturation pressure curve at 623.15 K)

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hupperofp2
Explicit upper specific enthalpy limit of region 2 as function of pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​slowerofp2
Explicit lower specific entropy limit of region 2 as function of pressure (meets region 4 saturation pressure curve at 623.15 K)

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​supperofp2
Explicit upper specific entropy limit of region 2 as function of pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​d1n
Density in region 1 as function of p and T

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
TemperatureTTemperature (K)

Outputs

TypeNameDescription
DensitydDensity

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​d2n
Density in region 2 as function of p and T

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
TemperatureTTemperature (K)

Outputs

TypeNameDescription
DensitydDensity

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​dhot1ofp
Density at upper temperature limit of region 1

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
DensitydDensity

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​dupper1ofT
Density at upper pressure limit of region 1

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
TemperatureTTemperature (K)

Outputs

TypeNameDescription
DensitydDensity

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hl_p_R4b
Explicit approximation of liquid specific enthalpy on the boundary between regions 4 and 3

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hv_p_R4b
Explicit approximation of vapour specific enthalpy on the boundary between regions 4 and 3

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​sl_p_R4b
Explicit approximation of liquid specific entropy on the boundary between regions 4 and 3

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​sv_p_R4b
Explicit approximation of vapour specific entropy on the boundary between regions 4 and 3

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropys 

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​rhol_p_R4b
Explicit approximation of liquid density on the boundary between regions 4 and 3

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
DensitydlLiquid density

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​rhov_p_R4b
Explicit approximation of vapour density on the boundary between regions 4 and 2

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
DensitydvVapour density

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​boilingcurve_p
Properties on the boiling curve

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
IF97PhaseBoundaryPropertiesbproProperty record

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​dewcurve_p
Properties on the dew curve

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
IF97PhaseBoundaryPropertiesbproProperty record

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hvl_p
Icon for functions

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
IF97PhaseBoundaryPropertiesbproProperty record

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hl_p
Liquid specific enthalpy on the boundary between regions 4 and 3 or 1

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hv_p
Vapour specific enthalpy on the boundary between regions 4 and 3 or 2

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEnthalpyhSpecific enthalpy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hvl_p_der
Derivative function for the specific enthalpy along the phase boundary

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
IF97PhaseBoundaryPropertiesbproProperty record
Realp_derDerivative of pressure

Outputs

TypeNameDescription
Realh_derTime derivative of specific enthalpy along the phase boundary

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​rhovl_p
Icon for functions

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
IF97PhaseBoundaryPropertiesbproProperty record

Outputs

TypeNameDescription
DensityrhoDensity

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​rhol_p
Density of saturated water

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepSaturation pressure

Outputs

TypeNameDescription
DensityrhoDensity of steam at the condensation point

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​rhov_p
Density of saturated vapour

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepSaturation pressure

Outputs

TypeNameDescription
DensityrhoDensity of steam at the condensation point

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​rhovl_p_der
Icon for functions

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepSaturation pressure
IF97PhaseBoundaryPropertiesbproProperty record
Realp_derDerivative of pressure

Outputs

TypeNameDescription
Reald_derTime derivative of density along the phase boundary

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​sl_p
Liquid specific entropy on the boundary between regions 4 and 3 or 1

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​sv_p
Vapour specific entropy on the boundary between regions 4 and 3 or 2

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
SpecificEntropysSpecific entropy

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​rhol_T
Density of saturated water

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
TemperatureTTemperature

Outputs

TypeNameDescription
DensitydDensity of water at the boiling point

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​rhov_T
Density of saturated vapour

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
TemperatureTTemperature

Outputs

TypeNameDescription
DensitydDensity of steam at the condensation point

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​region_ph
Return the current region (valid values: 1,2,3,4,5) in IF97 for given pressure and specific enthalpy

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
SpecificEnthalpyhSpecific enthalpy
IntegerphasePhase: 2 for two-phase, 1 for one phase, 0 if not known
IntegermodeMode: 0 means check, otherwise assume region=mode

Outputs

TypeNameDescription
IntegerregionRegion (valid values: 1,2,3,4,5) in IF97

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​region_ps
Return the current region (valid values: 1,2,3,4,5) in IF97 for given pressure and specific entropy

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
SpecificEntropysSpecific entropy
IntegerphasePhase: 2 for two-phase, 1 for one phase, 0 if unknown
IntegermodeMode: 0 means check, otherwise assume region=mode

Outputs

TypeNameDescription
IntegerregionRegion (valid values: 1,2,3,4,5) in IF97

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​region_pT
Return the current region (valid values: 1,2,3,5) in IF97, given pressure and temperature

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
TemperatureTTemperature (K)
IntegermodeMode: 0 means check, otherwise assume region=mode

Outputs

TypeNameDescription
IntegerregionRegion (valid values: 1,2,3,5) in IF97, region 4 is impossible!

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​region_dT
Return the current region (valid values: 1,2,3,4,5) in IF97, given density and temperature

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
DensitydDensity
TemperatureTTemperature (K)
IntegerphasePhase: 2 for two-phase, 1 for one phase, 0 if not known
IntegermodeMode: 0 means check, otherwise assume region=mode

Outputs

TypeNameDescription
Integerregion(valid values: 1,2,3,4,5) in IF97

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​hvl_dp
Derivative function for the specific enthalpy along the phase boundary

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure
IF97PhaseBoundaryPropertiesbproProperty record

Outputs

TypeNameDescription
Realdh_dpDerivative of specific enthalpy along the phase boundary

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​dhl_dp
Derivative of liquid specific enthalpy on the boundary between regions 4 and 3 or 1 w.r.t. pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
DerEnthalpyByPressuredh_dpSpecific enthalpy derivative w.r.t. pressure

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​dhv_dp
Derivative of vapour specific enthalpy on the boundary between regions 4 and 3 or 1 w.r.t. pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepPressure

Outputs

TypeNameDescription
DerEnthalpyByPressuredh_dpSpecific enthalpy derivative w.r.t. pressure

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​drhovl_dp
Icon for functions

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepSaturation pressure
IF97PhaseBoundaryPropertiesbproProperty record

Outputs

TypeNameDescription
Realdd_dpDerivative of density along the phase boundary

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​drhol_dp
Derivative of density of saturated water w.r.t. pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepSaturation pressure

Outputs

TypeNameDescription
DerDensityByPressuredd_dpDerivative of density of water at the boiling point

Function Modelica.​Media.​Water.​IF97_Utilities.​BaseIF97.​Regions.​drhov_dp
Derivative of density of saturated steam w.r.t. pressure

Information

This icon indicates Modelica functions.

Extends from Modelica.​Icons.​Function (Icon for functions).

Inputs

TypeNameDescription
PressurepSaturation pressure

Outputs

TypeNameDescription
DerDensityByPressuredd_dpDerivative of density of water at the boiling point

Generated 2018-12-12 12:14:30 EST by MapleSim.