Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses

Efficient inverses for selected pairs of variables

Information

Package description

Package contents

Function fixdT constrains density and temperature to allowed region
Function dofp13 computes d as a function of p at boundary between regions 1 and 3
Function dofp23 computes d as a function of p at boundary between regions 2 and 3
Function dofpt3 iteration to compute d as a function of p and T in region 3
Function dtofph3 iteration to compute d and T as a function of p and h in region 3
Function dtofps3 iteration to compute d and T as a function of p and s in region 3
Function dtofpsdt3 iteration to compute d and T as a function of p and s in region 3, with initial guesses
Function pofdt125 iteration to compute p as a function of p and T in regions 1, 2 and 5
Function tofph5 iteration to compute T as a function of p and h in region 5
Function tofps5 iteration to compute T as a function of p and s in region 5
Function tofpst5 iteration to compute T as a function of p and s in region 5, with initial guess in T

Version Info and Revision history

First implemented: July, 2000 by Hubertus Tummescheit

Author: Hubertus Tummescheit,
Modelon AB
Ideon Science Park
SE-22370 Lund, Sweden
email: hubertus@modelon.se

Initial version: July 2000
Documentation added: December 2002

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

Package Content

Name	Description
fixdT	Region limits for inverse iteration in region 3
dofp13	Density at the boundary between regions 1 and 3
dofp23	Density at the boundary between regions 2 and 3
dofpt3	Inverse iteration in region 3: (d) = f(p,T)
dtofph3	Inverse iteration in region 3: (d,T) = f(p,h)
dtofps3	Inverse iteration in region 3: (d,T) = f(p,s)
dtofpsdt3	Inverse iteration in region 3: (d,T) = f(p,s)
pofdt125	Inverse iteration in region 1,2 and 5: p = g(d,T)
tofph5	Inverse iteration in region 5: (p,T) = f(p,h)
tofps5	Inverse iteration in region 5: (p,T) = f(p,s)
tofpst5	Inverse iteration in region 5: (p,T) = f(p,s)

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.fixdT

Region limits for inverse iteration in region 3

Information

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

Inputs

Name	Description
din	Density [kg/m3]
Tin	Temperature [K]

Outputs

Name	Description
dout	Density [kg/m3]
Tout	Temperature [K]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.dofp13

Density at the boundary between regions 1 and 3

Information

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

Inputs

Name	Description
p	Pressure [Pa]

Outputs

Name	Description
d	Density [kg/m3]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.dofp23

Density at the boundary between regions 2 and 3

Information

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

Inputs

Name	Description
p	Pressure [Pa]

Outputs

Name	Description
d	Density [kg/m3]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.dofpt3

Inverse iteration in region 3: (d) = f(p,T)

Information

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

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature (K) [K]
delp	Iteration converged if (p-pre(p) < delp) [Pa]

Outputs

Name	Description
d	Density [kg/m3]
error	Error flag: iteration failed if different from 0

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.dtofph3

Inverse iteration in region 3: (d,T) = f(p,h)

Information

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

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
delp	Iteration accuracy [Pa]
delh	Iteration accuracy [J/kg]

Outputs

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]
error	Error flag: iteration failed if different from 0

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.dtofps3

Inverse iteration in region 3: (d,T) = f(p,s)

Information

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

Inputs

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

Outputs

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]
error	Error flag: iteration failed if different from 0

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.dtofpsdt3

Inverse iteration in region 3: (d,T) = f(p,s)

Information

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

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
dguess	Guess density, e.g., from adjacent volume [kg/m3]
Tguess	Guess temperature, e.g., from adjacent volume [K]
delp	Iteration accuracy [Pa]
dels	Iteration accuracy [J/(kg.K)]

Outputs

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]
error	Error flag: iteration failed if different from 0

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.pofdt125

Inverse iteration in region 1,2 and 5: p = g(d,T)

Information

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

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]
reldd	Relative iteration accuracy of density [Pa]
region	Region in IAPWS/IF97 in which inverse should be calculated

Outputs

Name	Description
p	Pressure [Pa]
error	Error flag: iteration failed if different from 0

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.tofph5

Inverse iteration in region 5: (p,T) = f(p,h)

Information

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

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
reldh	Iteration accuracy [J/kg]

Outputs

Name	Description
T	Temperature (K) [K]
error	Error flag: iteration failed if different from 0

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.tofps5

Inverse iteration in region 5: (p,T) = f(p,s)

Information

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

Inputs

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

Outputs

Name	Description
T	Temperature (K) [K]
error	Error flag: iteration failed if different from 0

Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses.tofpst5

Inverse iteration in region 5: (p,T) = f(p,s)

Information

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

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
Tguess	Guess temperature, e.g., from adjacent volume [K]
relds	Iteration accuracy [J/(kg.K)]

Outputs

Name	Description
T	Temperature (K) [K]
error	Error flag: iteration failed if different from 0

Automatically generated Thu Dec 19 17:20:24 2019.