Modelica.Media.Water.IF97_Utilities

Information

Package description:

This package provides high accuracy physical properties for water according to the IAPWS/IF97 standard. It has been part of the ThermoFluid Modelica library and been extended, reorganized and documented to become part of the Modelica Standard library.

An important feature that distinguishes this implementation of the IF97 steam property standard is that this implementation has been explicitly designed to work well in dynamic simulations. Computational performance has been of high importance. This means that there often exist several ways to get the same result from different functions if one of the functions is called often but can be optimized for that purpose.

The original documentation of the IAPWS/IF97 steam properties can freely be distributed with computer implementations, so for curious minds the complete standard documentation is provided with the Modelica properties library. The following documents are included (in directory Modelica/Resources/Documentation/Media/Water/IF97documentation):

• IF97.pdf The standards document for the main part of the IF97.
• Back3.pdf The backwards equations for region 3.
• crits.pdf The critical point data.
• meltsub.pdf The melting- and sublimation line formulation (in IF97_Utilities.BaseIF97.IceBoundaries)
• surf.pdf The surface tension standard definition
• thcond.pdf The thermal conductivity standard definition
• visc.pdf The viscosity standard definition

Package contents

• Package BaseIF97 contains the implementation of the IAPWS-IF97 as described in IF97.pdf. The explicit backwards equations for region 3 from Back3.pdf are implemented as initial values for an inverse iteration of the exact function in IF97 for the input pairs (p,h) and (p,s). The low-level functions in BaseIF97 are not needed for standard simulation usage, but can be useful for experts and some special purposes.
• Function water_ph returns all properties needed for a dynamic control volume model and properties of general interest using pressure p and specific entropy enthalpy h as dynamic states in the record ThermoProperties_ph.
• Function water_ps returns all properties needed for a dynamic control volume model and properties of general interest using pressure p and specific entropy s as dynamic states in the record ThermoProperties_ps.
• Function water_dT returns all properties needed for a dynamic control volume model and properties of general interest using density d and temperature T as dynamic states in the record ThermoProperties_dT.
• Function water_pT returns all properties needed for a dynamic control volume model and properties of general interest using pressure p and temperature T as dynamic states in the record ThermoProperties_pT. Due to the coupling of pressure and temperature in the two-phase region, this model can obviously only be used for one-phase models or models treating both phases independently.
• Function hl_p computes the liquid specific enthalpy as a function of pressure. For overcritical pressures, the critical specific enthalpy is returned
• Function hv_p computes the vapour specific enthalpy as a function of pressure. For overcritical pressures, the critical specific enthalpy is returned
• Function sl_p computes the liquid specific entropy as a function of pressure. For overcritical pressures, the critical specific entropy is returned
• Function sv_p computes the vapour specific entropy as a function of pressure. For overcritical pressures, the critical specific entropy is returned
• Function rhol_T computes the liquid density as a function of temperature. For overcritical temperatures, the critical density is returned
• Function rhol_T computes the vapour density as a function of temperature. For overcritical temperatures, the critical density is returned
• Function dynamicViscosity computes the dynamic viscosity as a function of density and temperature.
• Function thermalConductivity computes the thermal conductivity as a function of density, temperature and pressure. Important note: Obviously only two of the three inputs are really needed, but using three inputs speeds up the computation and the three variables are known in most models anyways. The inputs d,T and p have to be consistent.
• Function surfaceTension computes the surface tension between vapour and liquid water as a function of temperature.
• Function isentropicEnthalpy computes the specific enthalpy h(p,s,phase) in all regions. The phase input is needed due to discontinuous derivatives at the phase boundary.
• Function dynamicIsentropicEnthalpy computes the specific enthalpy 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 for the ThermoFluid Library with help from Jonas Eborn and Falko Jens Wagner
• Code reorganization, enhanced documentation, additional functions: December, 2002 by Hubertus Tummescheit and moved to Modelica properties library.

Package Content

Name	Description
BaseIF97	Modelica Physical Property Model: the new industrial formulation IAPWS-IF97
iter
waterBaseProp_ph	Intermediate property record for water
waterBaseProp_ps	Intermediate property record for water
rho_props_ps	Density as function of pressure and specific entropy
rho_ps	Density as function of pressure and specific entropy
T_props_ps	Temperature as function of pressure and specific entropy
T_ps	Temperature as function of pressure and specific entropy
h_props_ps	Specific enthalpy as function or pressure and temperature
h_ps	Specific enthalpy as function or pressure and temperature
phase_ps	Phase as a function of pressure and specific entropy
phase_ph	Phase as a function of pressure and specific enthalpy
phase_dT	Phase as a function of pressure and temperature
rho_props_ph	Density as function of pressure and specific enthalpy
rho_ph	Density as function of pressure and specific enthalpy
rho_ph_der	Derivative function of rho_ph
T_props_ph	Temperature as function of pressure and specific enthalpy
T_ph	Temperature as function of pressure and specific enthalpy
T_ph_der	Derivative function of T_ph
s_props_ph	Specific entropy as function of pressure and specific enthalpy
s_ph	Specific entropy as function of pressure and specific enthalpy
s_ph_der	Specific entropy as function of pressure and specific enthalpy
cv_props_ph	Specific heat capacity at constant volume as function of pressure and specific enthalpy
cv_ph	Specific heat capacity at constant volume as function of pressure and specific enthalpy
regionAssertReal	Assert function for inlining
cp_props_ph	Specific heat capacity at constant pressure as function of pressure and specific enthalpy
cp_ph	Specific heat capacity at constant pressure as function of pressure and specific enthalpy
beta_props_ph	Isobaric expansion coefficient as function of pressure and specific enthalpy
beta_ph	Isobaric expansion coefficient as function of pressure and specific enthalpy
kappa_props_ph	Isothermal compressibility factor as function of pressure and specific enthalpy
kappa_ph	Isothermal compressibility factor as function of pressure and specific enthalpy
velocityOfSound_props_ph	Speed of sound as function of pressure and specific enthalpy
velocityOfSound_ph
isentropicExponent_props_ph	Isentropic exponent as function of pressure and specific enthalpy
isentropicExponent_ph	Isentropic exponent as function of pressure and specific enthalpy
ddph_props	Density derivative by pressure
ddph	Density derivative by pressure
ddhp_props	Density derivative by specific enthalpy
ddhp	Density derivative by specific enthalpy
waterBaseProp_pT	Intermediate property record for water (p and T preferred states)
rho_props_pT	Density as function or pressure and temperature
rho_pT	Density as function or pressure and temperature
h_props_pT	Specific enthalpy as function or pressure and temperature
h_pT	Specific enthalpy as function or pressure and temperature
h_pT_der	Derivative function of h_pT
rho_pT_der	Derivative function of rho_pT
s_props_pT	Specific entropy as function of pressure and temperature
s_pT	Temperature as function of pressure and temperature
cv_props_pT	Specific heat capacity at constant volume as function of pressure and temperature
cv_pT	Specific heat capacity at constant volume as function of pressure and temperature
cp_props_pT	Specific heat capacity at constant pressure as function of pressure and temperature
cp_pT	Specific heat capacity at constant pressure as function of pressure and temperature
beta_props_pT	Isobaric expansion coefficient as function of pressure and temperature
beta_pT	Isobaric expansion coefficient as function of pressure and temperature
kappa_props_pT	Isothermal compressibility factor as function of pressure and temperature
kappa_pT	Isothermal compressibility factor as function of pressure and temperature
velocityOfSound_props_pT	Speed of sound as function of pressure and temperature
velocityOfSound_pT	Speed of sound as function of pressure and temperature
isentropicExponent_props_pT	Isentropic exponent as function of pressure and temperature
isentropicExponent_pT	Isentropic exponent as function of pressure and temperature
waterBaseProp_dT	Intermediate property record for water (d and T preferred states)
h_props_dT	Specific enthalpy as function of density and temperature
h_dT	Specific enthalpy as function of density and temperature
h_dT_der	Derivative function of h_dT
p_props_dT	Pressure as function of density and temperature
p_dT	Pressure as function of density and temperature
p_dT_der	Derivative function of p_dT
s_props_dT	Specific entropy as function of density and temperature
s_dT	Temperature as function of density and temperature
cv_props_dT	Specific heat capacity at constant volume as function of density and temperature
cv_dT	Specific heat capacity at constant volume as function of density and temperature
cp_props_dT	Specific heat capacity at constant pressure as function of density and temperature
cp_dT	Specific heat capacity at constant pressure as function of density and temperature
beta_props_dT	Isobaric expansion coefficient as function of density and temperature
beta_dT	Isobaric expansion coefficient as function of density and temperature
kappa_props_dT	Isothermal compressibility factor as function of density and temperature
kappa_dT	Isothermal compressibility factor as function of density and temperature
velocityOfSound_props_dT	Speed of sound as function of density and temperature
velocityOfSound_dT	Speed of sound as function of density and temperature
isentropicExponent_props_dT	Isentropic exponent as function of density and temperature
isentropicExponent_dT	Isentropic exponent as function of density and temperature
hl_p	Compute the saturated liquid specific h(p)
hv_p	Compute the saturated vapour specific h(p)
sl_p	Compute the saturated liquid specific s(p)
sv_p	Compute the saturated vapour specific s(p)
rhol_T	Compute the saturated liquid d(T)
rhov_T	Compute the saturated vapour d(T)
rhol_p	Compute the saturated liquid d(p)
rhov_p	Compute the saturated vapour d(p)
dynamicViscosity	Compute eta(d,T) in the one-phase region
thermalConductivity	Compute lambda(d,T,p) in the one-phase region
surfaceTension	Compute sigma(T) at saturation T
isentropicEnthalpy	Isentropic specific enthalpy from p,s (preferably use dynamicIsentropicEnthalpy in dynamic simulation!)
isentropicEnthalpy_props
isentropicEnthalpy_der	Derivative of isentropic specific enthalpy from p,s
dynamicIsentropicEnthalpy	Isentropic specific enthalpy from p,s and good guesses of d and T

Modelica.Media.Water.IF97_Utilities.iter

Modelica.Media.Water.IF97_Utilities.waterBaseProp_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	Phase: 2 for two-phase, 1 for one phase, 0 if unknown
region	If 0, do region computation, otherwise assume the region is this input

Outputs

Name	Description
aux	Auxiliary record

Modelica.Media.Water.IF97_Utilities.waterBaseProp_ps

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
region	If 0, do region computation, otherwise assume the region is this input

Outputs

Name	Description
aux	Auxiliary record

Modelica.Media.Water.IF97_Utilities.rho_props_ps

Information

Inputs

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

Outputs

Name	Description
rho	Density [kg/m3]

Modelica.Media.Water.IF97_Utilities.rho_ps

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
rho	Density [kg/m3]

Modelica.Media.Water.IF97_Utilities.T_props_ps

Information

Inputs

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

Outputs

Name	Description
T	Temperature [K]

Modelica.Media.Water.IF97_Utilities.T_ps

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
T	Temperature [K]

Modelica.Media.Water.IF97_Utilities.h_props_ps

Information

Inputs

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

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.h_ps

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.phase_ps

Information

Inputs

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

Outputs

Name	Description
phase	True if in liquid or gas or supercritical region

Modelica.Media.Water.IF97_Utilities.phase_ph

Information

Inputs

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

Outputs

Name	Description
phase	True if in liquid or gas or supercritical region

Modelica.Media.Water.IF97_Utilities.phase_dT

Information

Inputs

Name	Description
rho	Density [kg/m3]
T	Temperature [K]

Outputs

Name	Description
phase	True if in liquid or gas or supercritical region

Modelica.Media.Water.IF97_Utilities.rho_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
properties	Auxiliary record

Outputs

Name	Description
rho	Density [kg/m3]

Modelica.Media.Water.IF97_Utilities.rho_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
rho	Density [kg/m3]

Modelica.Media.Water.IF97_Utilities.rho_ph_der

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record
p_der	Derivative of pressure
h_der	Derivative of specific enthalpy

Outputs

Name	Description
rho_der	Derivative of density

Modelica.Media.Water.IF97_Utilities.T_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
properties	Auxiliary record

Outputs

Name	Description
T	Temperature [K]

Modelica.Media.Water.IF97_Utilities.T_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
T	Temperature [K]

Modelica.Media.Water.IF97_Utilities.T_ph_der

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record
p_der	Derivative of pressure
h_der	Derivative of specific enthalpy

Outputs

Name	Description
T_der	Derivative of temperature

Modelica.Media.Water.IF97_Utilities.s_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
properties	Auxiliary record

Outputs

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

Modelica.Media.Water.IF97_Utilities.s_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

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

Modelica.Media.Water.IF97_Utilities.s_ph_der

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record
p_der	Derivative of pressure
h_der	Derivative of specific enthalpy

Outputs

Name	Description
s_der	Derivative of entropy

Modelica.Media.Water.IF97_Utilities.cv_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record

Outputs

Name	Description
cv	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.cv_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
cv	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.regionAssertReal

Information

Inputs

Name	Description
check	Condition to check

Outputs

Name	Description
dummy	Dummy output

Modelica.Media.Water.IF97_Utilities.cp_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record

Outputs

Name	Description
cp	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.cp_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
cp	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.beta_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record

Outputs

Name	Description
beta	Isobaric expansion coefficient [1/K]

Modelica.Media.Water.IF97_Utilities.beta_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
beta	Isobaric expansion coefficient [1/K]

Modelica.Media.Water.IF97_Utilities.kappa_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record

Outputs

Name	Description
kappa	Isothermal compressibility factor [1/Pa]

Modelica.Media.Water.IF97_Utilities.kappa_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
kappa	Isothermal compressibility factor [1/Pa]

Modelica.Media.Water.IF97_Utilities.velocityOfSound_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record

Outputs

Name	Description
v_sound	Speed of sound [m/s]

Modelica.Media.Water.IF97_Utilities.velocityOfSound_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
v_sound	Speed of sound [m/s]

Modelica.Media.Water.IF97_Utilities.isentropicExponent_props_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record

Outputs

Name	Description
gamma	Isentropic exponent

Modelica.Media.Water.IF97_Utilities.isentropicExponent_ph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
gamma	Isentropic exponent

Modelica.Media.Water.IF97_Utilities.ddph_props

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record

Outputs

Name	Description
ddph	Density derivative by pressure [s2/m2]

Modelica.Media.Water.IF97_Utilities.ddph

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
ddph	Density derivative by pressure [s2/m2]

Modelica.Media.Water.IF97_Utilities.ddhp_props

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
aux	Auxiliary record

Outputs

Name	Description
ddhp	Density derivative by specific enthalpy [kg.s2/m5]

Modelica.Media.Water.IF97_Utilities.ddhp

Information

Inputs

Name	Description
p	Pressure [Pa]
h	Specific enthalpy [J/kg]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
ddhp	Density derivative by specific enthalpy [kg.s2/m5]

Modelica.Media.Water.IF97_Utilities.waterBaseProp_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, do region computation, otherwise assume the region is this input

Outputs

Name	Description
aux	Auxiliary record

Modelica.Media.Water.IF97_Utilities.rho_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
rho	Density [kg/m3]

Modelica.Media.Water.IF97_Utilities.rho_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
rho	Density [kg/m3]

Modelica.Media.Water.IF97_Utilities.h_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.h_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.h_pT_der

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record
p_der	Derivative of pressure
T_der	Derivative of temperature

Outputs

Name	Description
h_der	Derivative of specific enthalpy

Modelica.Media.Water.IF97_Utilities.rho_pT_der

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record
p_der	Derivative of pressure
T_der	Derivative of temperature

Outputs

Name	Description
rho_der	Derivative of density

Modelica.Media.Water.IF97_Utilities.s_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

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

Modelica.Media.Water.IF97_Utilities.s_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

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

Modelica.Media.Water.IF97_Utilities.cv_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
cv	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.cv_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
cv	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.cp_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
cp	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.cp_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
cp	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.beta_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
beta	Isobaric expansion coefficient [1/K]

Modelica.Media.Water.IF97_Utilities.beta_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
beta	Isobaric expansion coefficient [1/K]

Modelica.Media.Water.IF97_Utilities.kappa_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
kappa	Isothermal compressibility factor [1/Pa]

Modelica.Media.Water.IF97_Utilities.kappa_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
kappa	Isothermal compressibility factor [1/Pa]

Modelica.Media.Water.IF97_Utilities.velocityOfSound_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
v_sound	Speed of sound [m/s]

Modelica.Media.Water.IF97_Utilities.velocityOfSound_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
v_sound	Speed of sound [m/s]

Modelica.Media.Water.IF97_Utilities.isentropicExponent_props_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
gamma	Isentropic exponent

Modelica.Media.Water.IF97_Utilities.isentropicExponent_pT

Information

Inputs

Name	Description
p	Pressure [Pa]
T	Temperature [K]
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
gamma	Isentropic exponent

Modelica.Media.Water.IF97_Utilities.waterBaseProp_dT

Information

Inputs

Name	Description
rho	Density [kg/m3]
T	Temperature [K]
phase	Phase: 2 for two-phase, 1 for one phase, 0 if unknown
region	If 0, do region computation, otherwise assume the region is this input

Outputs

Name	Description
aux	Auxiliary record

Modelica.Media.Water.IF97_Utilities.h_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.h_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.h_dT_der

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record
d_der	Derivative of density
T_der	Derivative of temperature

Outputs

Name	Description
h_der	Derivative of specific enthalpy

Modelica.Media.Water.IF97_Utilities.p_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
p	Pressure [Pa]

Modelica.Media.Water.IF97_Utilities.p_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
p	Pressure [Pa]

Modelica.Media.Water.IF97_Utilities.p_dT_der

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record
d_der	Derivative of density
T_der	Derivative of temperature

Outputs

Name	Description
p_der	Derivative of pressure

Modelica.Media.Water.IF97_Utilities.s_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

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

Modelica.Media.Water.IF97_Utilities.s_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

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

Modelica.Media.Water.IF97_Utilities.cv_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
cv	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.cv_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
cv	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.cp_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
cp	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.cp_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
cp	Specific heat capacity [J/(kg.K)]

Modelica.Media.Water.IF97_Utilities.beta_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
beta	Isobaric expansion coefficient [1/K]

Modelica.Media.Water.IF97_Utilities.beta_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
beta	Isobaric expansion coefficient [1/K]

Modelica.Media.Water.IF97_Utilities.kappa_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
kappa	Isothermal compressibility factor [1/Pa]

Modelica.Media.Water.IF97_Utilities.kappa_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
kappa	Isothermal compressibility factor [1/Pa]

Modelica.Media.Water.IF97_Utilities.velocityOfSound_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
v_sound	Speed of sound [m/s]

Modelica.Media.Water.IF97_Utilities.velocityOfSound_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
v_sound	Speed of sound [m/s]

Modelica.Media.Water.IF97_Utilities.isentropicExponent_props_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
aux	Auxiliary record

Outputs

Name	Description
gamma	Isentropic exponent

Modelica.Media.Water.IF97_Utilities.isentropicExponent_dT

Information

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature [K]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
gamma	Isentropic exponent

Modelica.Media.Water.IF97_Utilities.hl_p

Inputs

Name	Description
p	Pressure [Pa]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.hv_p

Inputs

Name	Description
p	Pressure [Pa]

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.sl_p

Inputs

Name	Description
p	Pressure [Pa]

Outputs

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

Modelica.Media.Water.IF97_Utilities.sv_p

Inputs

Name	Description
p	Pressure [Pa]

Outputs

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

Modelica.Media.Water.IF97_Utilities.rhol_T

Inputs

Name	Description
T	Temperature [K]

Outputs

Name	Description
d	Density of water at the boiling point [kg/m3]

Modelica.Media.Water.IF97_Utilities.rhov_T

Inputs

Name	Description
T	Temperature [K]

Outputs

Name	Description
d	Density of steam at the condensation point [kg/m3]

Modelica.Media.Water.IF97_Utilities.rhol_p

Inputs

Name	Description
p	Saturation pressure [Pa]

Outputs

Name	Description
rho	Density of steam at the condensation point [kg/m3]

Modelica.Media.Water.IF97_Utilities.rhov_p

Inputs

Name	Description
p	Saturation pressure [Pa]

Outputs

Name	Description
rho	Density of steam at the condensation point [kg/m3]

Modelica.Media.Water.IF97_Utilities.dynamicViscosity

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]
p	Pressure (only needed for region of validity) [Pa]
phase	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Name	Description
eta	Dynamic viscosity [Pa.s]

Modelica.Media.Water.IF97_Utilities.thermalConductivity

Inputs

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]
p	Pressure [Pa]
phase	2 for two-phase, 1 for one-phase, 0 if not known
industrialMethod	If true, the industrial method is used, otherwise the scientific one

Outputs

Name	Description
lambda	Thermal conductivity [W/(m.K)]

Modelica.Media.Water.IF97_Utilities.surfaceTension

Inputs

Name	Description
T	Temperature (K) [K]

Outputs

Name	Description
sigma	Surface tension in SI units [N/m]

Modelica.Media.Water.IF97_Utilities.isentropicEnthalpy

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
phase	2 for two-phase, 1 for one-phase, 0 if not known
region	If 0, region is unknown, otherwise known and this input

Outputs

Name	Description
h	Specific enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.isentropicEnthalpy_props

Information

Inputs

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

Outputs

Name	Description
h	Isentropic enthalpy [J/kg]

Modelica.Media.Water.IF97_Utilities.isentropicEnthalpy_der

Information

Inputs

Name	Description
p	Pressure [Pa]
s	Specific entropy [J/(kg.K)]
aux	Auxiliary record
p_der	Pressure derivative
s_der	Entropy derivative

Outputs

Name	Description
h_der	Specific enthalpy derivative

Modelica.Media.Water.IF97_Utilities.dynamicIsentropicEnthalpy

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	2 for two-phase, 1 for one-phase, 0 if not known

Outputs

Name	Description
h	Specific enthalpy [J/kg]