Incompressible water with constant heat capacity
This package is a template for new medium models. For a new medium model just make a copy of this package, remove the "partial" keyword from the package and provide the information that is requested in the comments of the Modelica source.
Extends from Interfaces.PartialMedium.
| Name | Description |
|---|---|
| Water chemical substances interface | |
| Adapter between SubstancesPort and water medium | |
| Specific enthalpies of substances at defined temperature, pressure, electric potential | |
| Base properties of medium | |
| A selection of variables that uniquely defines the thermodynamic state | |
| Return thermodynamic state as function of p, T and composition X or Xi | |
| Return thermodynamic state as function of p, h and composition X or Xi | |
| Return specific enthalpy | |
| Return specific heat capacity at constant pressure | |
| Inherited | |
| Find index of substance | |
| Find index of extra property | |
| SubstanceFlowNominal=ones(nS) | Nominal of substance flow |
| SpecificEnthalpyNominal=-1E6 | Nominal of specific enthalpy |
| To find u as temperature, where temperatureError(u,p,X,h)->0 | |
| ThermoStates=Modelica.Media.Interfaces.Choices.IndependentVariables.pTX | Enumeration type for independent variables |
| mediumName="Water" | Name of the medium |
| substanceNames={"H2O"} | Names of the mixture substances. Set substanceNames={mediumName} if only one substance. |
| extraPropertiesNames=fill("", 0) | Names of the additional (extra) transported properties. Set extraPropertiesNames=fill("",0) if unused |
| singleState=true | = true, if u and d are not a function of pressure |
| reducedX=true | = true if medium contains the equation sum(X) = 1.0; set reducedX=true if only one substance (see docu for details) |
| fixedX=false | = true if medium contains the equation X = reference_X |
| reference_p=101325 | Reference pressure of Medium: default 1 atmosphere |
| reference_T=310.15 | Reference temperature of Medium: default 25 deg Celsius |
| reference_X={1} | Default mass fractions of medium |
| p_default=101325 | Default value for pressure of medium (for initialization) |
| T_default=Modelica.Units.Conversions.from_degC(20) | Default value for temperature of medium (for initialization) |
| h_default=specificEnthalpy_pTX(p_default, T_default, X_default) | Default value for specific enthalpy of medium (for initialization) |
| X_default=reference_X | Default value for mass fractions of medium (for initialization) |
| C_default=fill(0, nC) | Default value for trace substances of medium (for initialization) |
| nS=size(substanceNames, 1) | Number of substances |
| nX=nS | Number of mass fractions |
| nXi=if fixedX then 0 else if reducedX then nS - 1 else nS | Number of structurally independent mass fractions (see docu for details) |
| nC=size(extraPropertiesNames, 1) | Number of extra (outside of standard mass-balance) transported properties |
| C_nominal=1.0e-6*ones(nC) | Default for the nominal values for the extra properties |
| Critical, triple, molecular and other standard data of fluid | |
| Return thermodynamic state as function of p, s and composition X or Xi | |
| Return thermodynamic state as function of d, T and composition X or Xi | |
| Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b | |
| Return dynamic viscosity | |
| Return thermal conductivity | |
| Return the Prandtl number | |
| Return specific internal energy | |
| Return specific entropy | |
| Return specific Gibbs energy | |
| Return specific Helmholtz energy | |
| Alias for deprecated name | |
| Return specific heat capacity at constant volume | |
| Alias for deprecated name | |
| Return isentropic exponent | |
| Return isentropic enthalpy | |
| Return velocity of sound | |
| Return overall the isobaric expansion coefficient beta | |
| Alias for isobaricExpansionCoefficient for user convenience | |
| Return overall the isothermal compressibility factor | |
| Alias of isothermalCompressibility for user convenience | |
| Return density derivative w.r.t. pressure at const specific enthalpy | |
| Return density derivative w.r.t. specific enthalpy at constant pressure | |
| Return density derivative w.r.t. pressure at const temperature | |
| Return density derivative w.r.t. temperature at constant pressure | |
| Return density derivative w.r.t. mass fraction | |
| Return the molar mass of the medium | |
| Return specific enthalpy from p, T, and X or Xi | |
| Return specific enthalpy from p, T, and X or Xi | |
| Return density from p, T, and X or Xi | |
| Return temperature from p, h, and X or Xi | |
| Return density from p, h, and X or Xi | |
| Return temperature from p,s, and X or Xi | |
| Return density from p, s, and X or Xi | |
| Return specific enthalpy from p, s, and X or Xi | |
| Type for mass flow rate with medium specific attributes | |
| Type for absolute pressure with medium specific attributes | |
| Type for density with medium specific attributes | |
| Type for dynamic viscosity with medium specific attributes | |
| Type for enthalpy flow rate with medium specific attributes | |
| Type for mass fraction with medium specific attributes | |
| Type for mole fraction with medium specific attributes | |
| Type for molar mass with medium specific attributes | |
| Type for molar volume with medium specific attributes | |
| Type for isentropic exponent with medium specific attributes | |
| Type for specific energy with medium specific attributes | |
| Type for specific internal energy with medium specific attributes | |
| Type for specific enthalpy with medium specific attributes | |
| Type for specific entropy with medium specific attributes | |
| Type for specific heat capacity with medium specific attributes | |
| Type for surface tension with medium specific attributes | |
| Type for temperature with medium specific attributes | |
| Type for thermal conductivity with medium specific attributes | |
| Type for Prandtl number with medium specific attributes | |
| Type for velocity of sound with medium specific attributes | |
| Type for unspecified, mass-specific property transported by flow | |
| Type for conserved integral of unspecified, mass specific property | |
| Type for flow rate of unspecified, mass-specific property | |
| Type for isobaric expansion coefficient with medium specific attributes | |
| Type for dipole moment with medium specific attributes | |
| Type for partial derivative of density with respect to pressure with medium specific attributes | |
| Type for partial derivative of density with respect to enthalpy with medium specific attributes | |
| Type for partial derivative of enthalpy with respect to pressure with medium specific attributes | |
| Type for partial derivative of density with respect to temperature with medium specific attributes | |
| Type for partial derivative of temperature with respect to pressure with medium specific attributes | |
| Saturation properties of two phase medium | |
| Validity limits for fluid model | |
| Phase of the fluid: 1 for 1-phase, 2 for two-phase, 0 for not known, e.g., interactive use | |
| The most basic version of a record used in several degrees of detail | |
| The ideal gas version of a record used in several degrees of detail | |
| The two phase fluid version of a record used in several degrees of detail | |
Physiolibrary.Media.Water.SubstancesPortWater chemical substances interface
| Name | Description |
|---|---|
| H2O | Free water molecule (in pure water is only cca 1 mol/kg free water molecules, other cca 54.5 mols are bounded together by hydrogen bonds) |
| H | Free hydrogen ion H+ |
| O2 | Free oxygen molecule |
| H2 | Free hydrogen molecule |
| OH | Free hydroxide molecule OH- |
| cathode | Electric cathode |
| anode | Electric anode |
Adapter between SubstancesPort and water medium
Extends from (Adaptor between selected free base chemical substances and medium substances).
| Name | Description |
|---|---|
| startSubstanceMasses[nS] | Initial value of medium substance masses [kg] |
| Name | Description |
|---|---|
| substances | free base chemical substances |
| p | pressure [Pa] |
| h | specific enthalpy [J/kg] |
| X[nS] | mass fractions of medium substances [1] |
| _i | electric current from substances [A] |
| substanceMassFlowsFromStream[nS] | flow of medium substances [kg/s] |
| substanceMasses[nS] | mass od medium substances [kg] |
| massFlows[nS] | mass flows trough substancesPort [kg/s] |
| T | temperature [K] |
| enthalpyFromSubstances | enthalpy from substances [W] |
| v | electric potential [V] |
Specific enthalpies of substances at defined temperature, pressure, electric potential
Extends from (Specific enthalpies of medium substances).
| Name | Description |
|---|---|
| T | Temperature [K] |
| p | Pressure [Pa] |
| v | Electric potential of the substance [V] |
| Name | Description |
|---|---|
| specificEnthalpy[nS] | Specific enthalpies of medium substances [J/kg] |
Physiolibrary.Media.Water.BasePropertiesBase properties of medium
Extends from (Base properties (p, d, T, h, u, R_s, MM and, if applicable, X and Xi) of a medium).
| Name | Description |
|---|---|
| standardOrderComponents | If true, and reducedX = true, the last element of X will be computed from the other ones |
| Advanced | |
| preferredMediumStates | = true if StateSelect.prefer shall be used for the independent property variables of the medium |
Physiolibrary.Media.Water.ThermodynamicStateA selection of variables that uniquely defines the thermodynamic state
Extends from Modelica.Icons.Record (Icon for records), (Minimal variable set that is available as input argument to every medium function).
Physiolibrary.Media.Water.setState_pTXReturn thermodynamic state as function of p, T and composition X or Xi
Extends from (Return thermodynamic state as function of p, T and composition X or Xi).
| Name | Description |
|---|---|
| p | Pressure [Pa] |
| T | Temperature [K] |
| X[:] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| state | Thermodynamic state record |
Physiolibrary.Media.Water.setState_phXReturn thermodynamic state as function of p, h and composition X or Xi
Extends from (Return thermodynamic state as function of p, h and composition X or Xi).
| Name | Description |
|---|---|
| p | Pressure [Pa] |
| h | Specific enthalpy [J/kg] |
| X[:] | Mass fractions [kg/kg] |
| Name | Description |
|---|---|
| state | Thermodynamic state record |
Physiolibrary.Media.Water.specificEnthalpyReturn specific enthalpy
Extends from (Return specific enthalpy).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| h | Specific enthalpy [J/kg] |
Physiolibrary.Media.Water.specificHeatCapacityCpReturn specific heat capacity at constant pressure
Extends from (Return specific heat capacity at constant pressure).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| cp | Specific heat capacity at constant pressure [J/(kg.K)] |
Physiolibrary.Media.Water.densityExtends from (Return density).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| d | Density [kg/m3] |
Physiolibrary.Media.Water.temperatureExtends from (Return temperature).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| T | Temperature [K] |
Physiolibrary.Media.Water.pressureExtends from (Return pressure).
| Name | Description |
|---|---|
| state | Thermodynamic state record |
| Name | Description |
|---|---|
| p | Pressure [Pa] |