Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic

Information

Package description

Package contents

• Function hofpT1 computes h(p,T) in region 1.
• Function handsofpT1 computes (s,h)=f(p,T) in region 1, needed for two-phase properties.
• Function hofps1 computes h(p,s) in region 1.
• Function hofpT2 computes h(p,T) in region 2.
• Function handsofpT2 computes (s,h)=f(p,T) in region 2, needed for two-phase properties.
• Function hofps2 computes h(p,s) in region 2.
• Function hofdT3 computes h(d,T) in region 3.
• Function hofpsdt3 computes h(p,s,dguess,Tguess) in region 3, where dguess and Tguess are initial guess values for the density and temperature consistent with p and s.
• Function hofps4 computes h(p,s) in region 4.
• Function hofpT5 computes h(p,T) in region 5.
• Function water_hisentropic computes h(p,s,phase) in all regions. The phase input is needed due to discontinuous derivatives at the phase boundary.
• Function water_hisentropic_dyn computes h(p,s,dguess,Tguess,phase) in all regions. The phase input is needed due to discontinuous derivatives at the phase boundary. Tguess and dguess are initial guess values for the density and temperature consistent with p and s. This function should be preferred in dynamic simulations where good guesses are often available.

Version Info and Revision history

• First implemented: July, 2000 by Hubertus Tummescheit

• Initial version: July 2000
• Documentation added: December 2002

Package Content

Name	Description
hofpT1	Intermediate function for isentropic specific enthalpy in region 1
handsofpT1	Special function for specific enthalpy and specific entropy in region 1
hofps1	Function for isentropic specific enthalpy in region 1
hofpT2	Intermediate function for isentropic specific enthalpy in region 2
handsofpT2	Function for isentropic specific enthalpy and specific entropy in region 2
hofps2	Function for isentropic specific enthalpy in region 2
hofdT3	Function for isentropic specific enthalpy in region 3
hofps3	Isentropic specific enthalpy in region 3 h(p,s)
hofpsdt3	Isentropic specific enthalpy in region 3 h(p,s) with given good guess in d and T
hofps4	Isentropic specific enthalpy in region 4 h(p,s)
hofpT5	Specific enthalpy in region 5 h(p,T)
water_hisentropic	Isentropic specific enthalpy from p,s (preferably use water_hisentropic_dyn in dynamic simulation!)
water_hisentropic_dyn	Isentropic specific enthalpy from p,s and good guesses of d and T

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofpT1

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature (K) [K]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.handsofpT1

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature (K) [K]

Outputs

Name	Description
h	Specific enthalpy [J/kg]
s	Specific entropy [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofps1

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofpT2

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature (K) [K]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.handsofpT2

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature (K) [K]

Outputs

Name	Description
h	Specific enthalpy [J/kg]
s	Specific entropy [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofps2

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofdT3

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofps3

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofpsdt3

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
dguess	Good guess density, e.g., from adjacent volume [kg/m3]
Tguess	Good guess temperature, e.g., from adjacent volume [K]
delp	Relative error in p [Pa]
dels	Relative error in s [J/(kg.K)]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofps4

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.hofpT5

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature (K) [K]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.water_hisentropic

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
phase	Phase: 2 for two-phase, 1 for one phase, 0 if unknown

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Isentropic.water_hisentropic_dyn

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
dguess	Good guess density, e.g., from adjacent volume [kg/m3]
Tguess	Good guess temperature, e.g., from adjacent volume [K]
phase	1 for one phase, 2 for two phase

Outputs

Name	Description
h	Specific enthalpy [J/kg]