This medium model is identical to Buildings.Media.ConstantPropertyLiquidWater, except for the following points:
kappa_const.
If kappa_const=0, then the density is constant. Otherwise,
the density is
ρ(p) = ρ(p0) ( 1 + κconst (p-p0)) This equation is implemented in the base class Buildings.Media.Interfaces.PartialSimpleMedium.
Extends from Buildings.Media.ConstantPropertyLiquidWater.BaseClasses.ConstantPropertyLiquidWater (Water: Simple liquid water medium (incompressible, constant data)).
| Name | Description |
|---|---|
 specificInternalEnergy
| Return specific internal energy |
 BaseClasses
| Package with base classes for Buildings.Media.ConstantPropertyLiquidWater |
| Inherited | |
| cp_const | Constant specific heat capacity at constant pressure |
| cv_const | Constant specific heat capacity at constant volume |
| d_const | Constant density |
| eta_const | Constant dynamic viscosity |
| lambda_const | Constant thermal conductivity |
| a_const | Constant velocity of sound |
| T_min | Minimum temperature valid for medium model |
| T_max | Maximum temperature valid for medium model |
| T0=reference_T | Zero enthalpy temperature |
| MM_const | Molar mass |
| fluidConstants | fluid constants |
 ThermodynamicState
| Thermodynamic state |
| kappa_const=0 | Compressibility factor at constant temperature |
| p0=3E5 | Reference pressure for compressibility and default medium pressure |
| constantDensity=(kappa_const <= 1E-20) | Flag, true if density is modeled as a constant |
 BaseProperties
| |
 setState_pTX
| Return thermodynamic state from p, T, and X or Xi |
| setState_phX
| Return thermodynamic state from p, h, and X or Xi |
| setState_psX
| Return thermodynamic state from p, s, and X or Xi |
| setState_dTX
| Return thermodynamic state from d, T, and X or Xi |
| setSmoothState
| Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b |
| dynamicViscosity
| Return dynamic viscosity |
| thermalConductivity
| Return thermal conductivity |
| pressure
| Return pressure |
| temperature
| Return temperature |
| density
| Return density |
| specificEnthalpy
| Return specific enthalpy |
| specificHeatCapacityCp
| Return specific heat capacity at constant pressure |
| specificHeatCapacityCv
| Return specific heat capacity at constant volume |
| isentropicExponent
| Return isentropic exponent |
| velocityOfSound
| Return velocity of sound |
| specificEnthalpy_pTX
| Return specific enthalpy from p, T, and X or Xi |
| temperature_phX
| Return temperature from p, h, and X or Xi |
| density_phX
| Return density from p, h, and X or Xi |
| setState_pT
| Return thermodynamic state from p and T |
| setState_ph
| Return thermodynamic state from p and h |
| setState_ps
| Return thermodynamic state from p and s |
| setState_dT
| Return thermodynamic state from d and T |
| density_ph
| Return density from p and h |
| temperature_ph
| Return temperature from p and h |
| pressure_dT
| Return pressure from d and T |
| specificEnthalpy_dT
| Return specific enthalpy from d and T |
| specificEnthalpy_ps
| Return specific enthalpy from p and s |
| temperature_ps
| Return temperature from p and s |
| density_ps
| Return density from p and s |
| specificEnthalpy_pT
| Return specific enthalpy from p and T |
| density_pT
| Return density from p and T |
| ThermoStates | Enumeration type for independent variables |
| mediumName="unusablePartialMedium" | Name of the medium |
| substanceNames={mediumName} | 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, 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=298.15 | Reference temperature of Medium: default 25 deg Celsius |
| reference_X=fill(1/nX, nX) | Default mass fractions of medium |
| p_default=101325 | Default value for pressure of medium (for initialization) |
| T_default=Modelica.SIunits.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) |
| 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 |
 FluidConstants
| critical, triple, molecular and other standard data of fluid |
 prandtlNumber
| Return the Prandtl number |
| specificEntropy
| Return specific entropy |
| specificGibbsEnergy
| Return specific Gibbs energy |
| specificHelmholtzEnergy
| Return specific Helmholtz energy |
| heatCapacity_cp
| alias for deprecated name |
| heatCapacity_cv
| alias for deprecated name |
| isentropicEnthalpy
| Return isentropic enthalpy |
| isobaricExpansionCoefficient
| Return overall the isobaric expansion coefficient beta |
| beta
| alias for isobaricExpansionCoefficient for user convenience |
| isothermalCompressibility
| Return overall the isothermal compressibility factor |
| kappa
| alias of isothermalCompressibility for user convenience |
| density_derp_h
| Return density derivative w.r.t. pressure at const specific enthalpy |
| density_derh_p
| Return density derivative w.r.t. specific enthalpy at constant pressure |
| density_derp_T
| Return density derivative w.r.t. pressure at const temperature |
| density_derT_p
| Return density derivative w.r.t. temperature at constant pressure |
| density_derX
| Return density derivative w.r.t. mass fraction |
| molarMass
| Return the molar mass of the medium |
| specificEntropy_pTX
| Return specific enthalpy from p, T, and X or Xi |
| density_pTX
| Return density from p, T, and X or Xi |
| temperature_psX
| Return temperature from p,s, and X or Xi |
| density_psX
| Return density from p, s, and X or Xi |
| specificEnthalpy_psX
| Return specific enthalpy from p, s, and X or Xi |
| AbsolutePressure | Type for absolute pressure with medium specific attributes |
| Density | Type for density with medium specific attributes |
| DynamicViscosity | Type for dynamic viscosity with medium specific attributes |
| EnthalpyFlowRate | Type for enthalpy flow rate with medium specific attributes |
| MassFlowRate | Type for mass flow rate with medium specific attributes |
| MassFraction | Type for mass fraction with medium specific attributes |
| MoleFraction | Type for mole fraction with medium specific attributes |
| MolarMass | Type for molar mass with medium specific attributes |
| MolarVolume | Type for molar volume with medium specific attributes |
| IsentropicExponent | Type for isentropic exponent with medium specific attributes |
| SpecificEnergy | Type for specific energy with medium specific attributes |
| SpecificInternalEnergy | Type for specific internal energy with medium specific attributes |
| SpecificEnthalpy | Type for specific enthalpy with medium specific attributes |
| SpecificEntropy | Type for specific entropy with medium specific attributes |
| SpecificHeatCapacity | Type for specific heat capacity with medium specific attributes |
| SurfaceTension | Type for surface tension with medium specific attributes |
| Temperature | Type for temperature with medium specific attributes |
| ThermalConductivity | Type for thermal conductivity with medium specific attributes |
| PrandtlNumber | Type for Prandtl number with medium specific attributes |
| VelocityOfSound | Type for velocity of sound with medium specific attributes |
| ExtraProperty | Type for unspecified, mass-specific property transported by flow |
| CumulativeExtraProperty | Type for conserved integral of unspecified, mass specific property |
| ExtraPropertyFlowRate | Type for flow rate of unspecified, mass-specific property |
| IsobaricExpansionCoefficient | Type for isobaric expansion coefficient with medium specific attributes |
| DipoleMoment | Type for dipole moment with medium specific attributes |
| DerDensityByPressure | Type for partial derivative of density with resect to pressure with medium specific attributes |
| DerDensityByEnthalpy | Type for partial derivative of density with resect to enthalpy with medium specific attributes |
| DerEnthalpyByPressure | Type for partial derivative of enthalpy with resect to pressure with medium specific attributes |
| DerDensityByTemperature | Type for partial derivative of density with resect to temperature with medium specific attributes |
 Choices
| Types, constants to define menu choices |
Buildings.Media.ConstantPropertyLiquidWater.specificInternalEnergy
| Type | Name | Default | Description |
|---|---|---|---|
| ThermodynamicState | state |
| Type | Name | Description |
|---|---|---|
| SpecificEnergy | u | Specific internal energy [J/kg] |
redeclare replaceable function extends specificInternalEnergy "Return specific internal energy" input ThermodynamicState state; output SpecificEnergy u "Specific internal energy"; algorithm u := cv_const * (state.T-T0); end specificInternalEnergy;