Isentropic

Functions for calculating the isentropic enthalpy from pressure p and specific entropy s

Package Contents

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

Information

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

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
Author: Hubertus Tummescheit,
Modelon AB
Ideon Science Park
SE-22370 Lund, Sweden
email: hubertus@modelon.se
  • Initial version: July 2000
  • Documentation added: December 2002