Low level and utility computation for high accuracy water properties according to the IAPWS/IF97 standard
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.
Author: Hubertus Tummescheit,
Modelon AB
Ideon Science Park
SE-22370 Lund, Sweden
email: hubertus@modelon.se
Extends from Modelica.Icons.UtilitiesPackage (Icon for utility packages).
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 |
 ThermoFluidSpecial
|
|
 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 |
Intermediate property record for water
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| aux | Auxiliary record |
Intermediate property record for water
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| aux | Auxiliary record |
Density as function of pressure and specific entropy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| rho | Density [kg/m3] |
Density as function of pressure and specific entropy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| rho | Density [kg/m3] |
Temperature as function of pressure and specific entropy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| T | Temperature [K] |
Temperature as function of pressure and specific entropy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| T | Temperature [K] |
Specific enthalpy as function or pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Specific enthalpy as function or pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Phase as a function of pressure and specific entropy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| phase | True if in liquid or gas or supercritical region |
Phase as a function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| phase | True if in liquid or gas or supercritical region |
Phase as a function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| phase | True if in liquid or gas or supercritical region |
Density as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| rho | Density [kg/m3] |
Density as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| rho | Density [kg/m3] |
Derivative function of rho_ph
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| rho_der | Derivative of density |
Temperature as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| T | Temperature [K] |
Temperature as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| T | Temperature [K] |
Derivative function of T_ph
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| T_der | Derivative of temperature |
Specific entropy as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Specific entropy as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Specific entropy as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| s_der | Derivative of entropy |
Specific heat capacity at constant volume as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cv | Specific heat capacity [J/(kg.K)] |
Specific heat capacity at constant volume as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cv | Specific heat capacity [J/(kg.K)] |
Assert function for inlining
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| dummy | Dummy output |
Specific heat capacity at constant pressure as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cp | Specific heat capacity [J/(kg.K)] |
Specific heat capacity at constant pressure as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cp | Specific heat capacity [J/(kg.K)] |
Isobaric expansion coefficient as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| beta | Isobaric expansion coefficient [1/K] |
Isobaric expansion coefficient as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| beta | Isobaric expansion coefficient [1/K] |
Isothermal compressibility factor as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| kappa | Isothermal compressibility factor [1/Pa] |
Isothermal compressibility factor as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| kappa | Isothermal compressibility factor [1/Pa] |
Speed of sound as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| v_sound | Speed of sound [m/s] |
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| v_sound | Speed of sound [m/s] |
Isentropic exponent as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| gamma | Isentropic exponent |
Isentropic exponent as function of pressure and specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| gamma | Isentropic exponent |
Density derivative by pressure
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| ddph | Density derivative by pressure [s2/m2] |
Density derivative by pressure
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| ddph | Density derivative by pressure [s2/m2] |
Density derivative by specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| ddhp | Density derivative by specific enthalpy [kg.s2/m5] |
Density derivative by specific enthalpy
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| ddhp | Density derivative by specific enthalpy [kg.s2/m5] |
Intermediate property record for water (p and T preferred states)
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| aux | Auxiliary record |
Density as function or pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| rho | Density [kg/m3] |
Density as function or pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| rho | Density [kg/m3] |
Specific enthalpy as function or pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Specific enthalpy as function or pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Derivative function of h_pT
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h_der | Derivative of specific enthalpy |
Derivative function of rho_pT
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| rho_der | Derivative of density |
Specific entropy as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Temperature as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Specific heat capacity at constant volume as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cv | Specific heat capacity [J/(kg.K)] |
Specific heat capacity at constant volume as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cv | Specific heat capacity [J/(kg.K)] |
Specific heat capacity at constant pressure as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cp | Specific heat capacity [J/(kg.K)] |
Specific heat capacity at constant pressure as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cp | Specific heat capacity [J/(kg.K)] |
Isobaric expansion coefficient as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| beta | Isobaric expansion coefficient [1/K] |
Isobaric expansion coefficient as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| beta | Isobaric expansion coefficient [1/K] |
Isothermal compressibility factor as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| kappa | Isothermal compressibility factor [1/Pa] |
Isothermal compressibility factor as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| kappa | Isothermal compressibility factor [1/Pa] |
Speed of sound as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| v_sound | Speed of sound [m/s] |
Speed of sound as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| v_sound | Speed of sound [m/s] |
Isentropic exponent as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| gamma | Isentropic exponent |
Isentropic exponent as function of pressure and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| gamma | Isentropic exponent |
Intermediate property record for water (d and T preferred states)
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| aux | Auxiliary record |
Specific enthalpy as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Specific enthalpy as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Derivative function of h_dT
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h_der | Derivative of specific enthalpy |
Pressure as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| p | Pressure [Pa] |
Pressure as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| p | Pressure [Pa] |
Derivative function of p_dT
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| p_der | Derivative of pressure |
Specific entropy as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Temperature as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Specific heat capacity at constant volume as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cv | Specific heat capacity [J/(kg.K)] |
Specific heat capacity at constant volume as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cv | Specific heat capacity [J/(kg.K)] |
Specific heat capacity at constant pressure as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cp | Specific heat capacity [J/(kg.K)] |
Specific heat capacity at constant pressure as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| cp | Specific heat capacity [J/(kg.K)] |
Isobaric expansion coefficient as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| beta | Isobaric expansion coefficient [1/K] |
Isobaric expansion coefficient as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| beta | Isobaric expansion coefficient [1/K] |
Isothermal compressibility factor as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| kappa | Isothermal compressibility factor [1/Pa] |
Isothermal compressibility factor as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| kappa | Isothermal compressibility factor [1/Pa] |
Speed of sound as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| v_sound | Speed of sound [m/s] |
Speed of sound as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| v_sound | Speed of sound [m/s] |
Isentropic exponent as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| gamma | Isentropic exponent |
Isentropic exponent as function of density and temperature
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| gamma | Isentropic exponent |
Compute the saturated liquid specific h(p)
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Compute the saturated vapour specific h(p)
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Compute the saturated liquid specific s(p)
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Compute the saturated vapour specific s(p)
Inputs
Outputs
| Name | Description |
|---|
| s | Specific entropy [J/(kg.K)] |
Compute the saturated liquid d(T)
Inputs
Outputs
| Name | Description |
|---|
| d | Density of water at the boiling point [kg/m3] |
Compute the saturated vapour d(T)
Inputs
Outputs
| Name | Description |
|---|
| d | Density of steam at the condensation point [kg/m3] |
Compute the saturated liquid d(p)
Inputs
Outputs
| Name | Description |
|---|
| rho | Density of steam at the condensation point [kg/m3] |
Compute the saturated vapour d(p)
Inputs
Outputs
| Name | Description |
|---|
| rho | Density of steam at the condensation point [kg/m3] |
Compute eta(d,T) in the one-phase region
Inputs
Outputs
| Name | Description |
|---|
| eta | Dynamic viscosity [Pa.s] |
Compute lambda(d,T,p) in the one-phase region
Inputs
Outputs
| Name | Description |
|---|
| lambda | Thermal conductivity [W/(m.K)] |
Compute sigma(T) at saturation T
Inputs
Outputs
| Name | Description |
|---|
| sigma | Surface tension in SI units [N/m] |
Isentropic specific enthalpy from p,s (preferably use dynamicIsentropicEnthalpy in dynamic simulation!)
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Isentropic enthalpy [J/kg] |
Derivative of isentropic specific enthalpy from p,s
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h_der | Specific enthalpy derivative |
Isentropic specific enthalpy from p,s and good guesses of d and T
Information
Extends from Modelica.Icons.Function (Icon for functions).
Inputs
Outputs
| Name | Description |
|---|
| h | Specific enthalpy [J/kg] |
Automatically generated Thu Oct 1 16:08:13 2020.
Modelica.Media.Water.IF97_Utilities.iter
Modelica.Media.Water.IF97_Utilities.waterBaseProp_ph