modelPhaseSeparator
Base model for receiver and accumulator models
Extends from Boundaries.Internal.PartialVolume (Partial volume with one inlet and one outlet).
Information
This Volume is the parent class for Accumulator and Receiver models that separate the two phases and are able to output gas, liquid or two-phase medium, depending on its liquid level and the height of the outlet.
Since there is no formula to compute density_derp_h for this volume, an upper bound has to be set in the parameter density_derp_h_set. Alternativeley the derivative can be taken from the media model for all the media that implement the corresponding formula by setting density_derp_h_from_media=true (default:false).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| String | instanceName (from DropOfCommonsPlus) | getInstanceName() | Instance name |
| Boolean | useHeatport (from PartialVolume) | false | =true, if heatport is enabled |
| Boolean | useInlet (from PartialVolume) | true | = true, if inlet is enabled |
| Boolean | useOutlet (from PartialVolume) | true | = true, if outlet is enabled |
| SI.Area | A (from PartialVolume) | 1 | Heat transfer area |
| SI.CoefficientOfHeatTransfer | U (from PartialVolume) | 200 | Thermal transmittance |
| SI.Volume | V_par | 0.01 | Volume |
| Real | pipe_low | Low end of pipe | |
| Real | pipe_high | High end of pipe | |
| Layout | |||
| Boolean | displayInstanceName (from DropOfCommonsPlus) | dropOfCommons.displayInstanceNames | = true, if instance name is displayed |
| Boolean | displayParameters (from DropOfCommonsPlus) | dropOfCommons.displayParameters | = true, if displaying parameters is enabled |
| Initialization › Pressure | |||
| Boolean | initialize_pressure (from PartialVolume) | true | =true, if pressure is initialized |
| Medium.AbsolutePressure | p_start (from PartialVolume) | Medium.p_default | Initial pressure set value |
| Initialization › Temperature | |||
| Boolean | initialize_energy (from PartialVolume) | true | = true, if internal energy is initialized |
| Medium.Temperature | T_start (from PartialVolume) | Medium.T_default | Initial Temperature set value |
| Initialization › Mass fractions | |||
| Boolean | initialize_Xi (from PartialVolume) | true | =true, if mass fractions are iinitialized |
| Medium.MassFraction[Medium.nXi] | Xi_0 (from PartialVolume) | Medium.X_default[1:Medium.nXi] | Initial mass fractions set values |
| Initialization › Specific enthalpy | |||
| Boolean | use_hstart (from PartialVolume) | false | =true, if internal energy is initialized with specific enthalpy |
| Medium.SpecificEnthalpy | h_start (from PartialVolume) | Medium.h_default | Initial specific enthalpy set value |
| Advanced | |||
| Boolean | enableFreeInlet (from PartialVolume) | false | true, if inlet is free (volume creates no pressure boundary condition) |
| Boolean | considerInertance (from PartialVolume) | dropOfCommons.considerInertance | =true, if transient momentum (inertance) term is considered; disable only for advanced use |
| Utilities.Units.Inertance | L (from PartialVolume) | dropOfCommons.L | Inertance of inlet/outlet |
| SI.MassFlowRate | m_flow_assert (from PartialVolume) | -dropOfCommons.m_flow_reg | Assertion threshold for negative massflow |
| Boolean | usePreferredMediumStates (from PartialVolume) | false | =true, if preferred medium states are used |
| Advanced › Damping | |||
| Real | k_volume_damping (from PartialVolume) | dropOfCommons.k_volume_damping | Damping factor multiplicator |
| Boolean | density_derp_h_from_media | false | = true, if the derivative of density by pressure at const specific enthalpy is calculated from media model (only available for some media models) |
| Medium.DerDensityByPressure | density_derp_h_set | 1e-6 | Derivative of density by pressure at const specific enthalpy set value (e.g approx. 1e-5 for air, 1e-7 for water) |
| Initialization | |||
| Init | init_method | ThermofluidStream.Boundaries.Internal.InitializationMethodsPhaseSeperator.l | Initialization method |
| Medium.SpecificEnthalpy | h_0 | Medium.h_default | Initial specific enthalpy |
| SI.Mass | M_0 | 1 | Initial mass |
| Real | l_0 | 0.5 | Initial liquid level |
| Real | x_0 | 0.5 | Initial vapor quality |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | heatPort (from PartialVolume) | ||
| Interfaces.Inlet | inlet (from PartialVolume) | ||
| Interfaces.Outlet | outlet (from PartialVolume) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.BaseProperties | medium (from PartialVolume) | ||
| SI.Volume | V (from PartialVolume) | Volume | |
| SI.Mass | M (from PartialVolume) | V*medium.d | Mass |
| SI.Mass[Medium.nXi] | MXi (from PartialVolume) | M*medium.Xi | Masses of species |
| SI.Energy | U_med (from PartialVolume) | M*medium.u | Internal energy |
| SI.HeatFlowRate | Q_flow (from PartialVolume) | Heat flow rate | |
| SI.Power | W_v (from PartialVolume) | Work due to change of volume | |
| Real | liquid_level | Level of liquid line | |
| Real | liquid_level_pipe | Level of liquid line in pipe | |
| Real | vapor_quality | max(0, min(1, x)) |