WOLFRAM SYSTEM MODELER

# Inverses

Efficient inverses for selected pairs of variables # Package Contents Region limits for inverse iteration in region 3 Density at the boundary between regions 1 and 3 Density at the boundary between regions 2 and 3 Inverse iteration in region 3: (d) = f(p,T) Inverse iteration in region 3: (d,T) = f(p,h) Inverse iteration in region 3: (d,T) = f(p,s) Inverse iteration in region 3: (d,T) = f(p,s) Inverse iteration in region 1,2 and 5: p = g(d,T) Inverse iteration in region 5: (p,T) = f(p,h) Inverse iteration in region 5: (p,T) = f(p,s) Inverse iteration in region 5: (p,T) = f(p,s)

# Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

#### 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 `SystemModel["Modelica.Media.Water.IF97_Utilities.BaseIF97.Inverses"]` 