modelDrum_L3
Drum : separated volume approach | level-dependent phase separation
Extends from ClaRa.Basics.Icons.Drum, ClaRa.Basics.Icons.ComplexityLevel (Displays the complexity level inside model icon ).
Information
For detailed model documentation please consult the html-documentation shipped with ClaRa.
Authorship and Copyright Statement for original (initial) Contribution
Author:
DYNCAP/DYNSTART development team, Copyright © 2011-2024.References:
For references please consult the html-documentation shipped with ClaRa.
Remarks:
This component was developed by ClaRa development team under the 3-clause BSD License.
Acknowledgements:ClaRa originated from the collaborative research projects DYNCAP and DYNSTART. Both research projects were supported by the German Federal Ministry for Economic Affairs and Energy (FKZ 03ET2009 and FKZ 03ET7060).
CLA:
The author(s) have agreed to ClaRa CLA, version 1.0. See https://claralib.com/pdf/CLA.pdf
By agreeing to ClaRa CLA, version 1.0 the author has granted the ClaRa development team a permanent right to use and modify his initial contribution as well as to publish it or its modified versions under the 3-clause BSD License.
The ClaRa development team consists of the following partners:
TLK-Thermo GmbH (Braunschweig, Germany)
XRG Simulation GmbH (Hamburg, Germany).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Fundamental Definitions | |||
| TILMedia.VLEFluid.Types.BaseVLEFluid | medium | simCenter.fluid1 | Medium in the component |
| Boolean | includeInsulation | false | True, if insulation is included |
| Geometry | |||
| ClaRa.Basics.Units.Length | diameter | 1 | Diameter of the component |
| ClaRa.Basics.Units.Length | length | 1 | Length of the component |
| ClaRa.Basics.Units.Length | thickness_wall | diameter*0.01/2 | Thickness of the cylinder wall |
| ClaRa.Basics.Units.Length | thickness_insulation | 0.02 | Thickness of the insulation |
| Basics.Choices.GeometryOrientation | orientation | ClaRa.Basics.Choices.GeometryOrientation.vertical | Orientation of the component |
| ClaRa.Basics.Units.Length | radius_flange | 0.05 | Flange radius |
| ClaRa.Basics.Units.Length | z_feed | 0 | Position of feedwater flange |
| ClaRa.Basics.Units.Length[3] | z_risers | {0.1, 0.1, 0.1} | Position of riser flange |
| ClaRa.Basics.Units.Length | z_sat | 0 | Position of saturated steam outlet |
| ClaRa.Basics.Units.Length[3] | z_downs | {0.1, 0.1, 0.1} | Position of downcomer flange |
| ClaRa.Basics.Units.Mass | mass_struc | 0 | Mass of internal structure addtional to drum wall |
| Phase Separation › Mass Transfer Between Phases | |||
| Basics.Units.Time | Tau_cond | 0.01 | Time constant of condensation |
| Basics.Units.Time | Tau_evap | Tau_cond*1000 | Time constant of evaporation |
| Real | absorbInflow | 1 | Absorption of incoming mass flow to the zones 1: perfect in the allocated zone, 0: perfect according to steam quality |
| Boolean | equalPressures | true | True if pressure in liquid and vapour phase is equal |
| Phase Separation › Heat Transfer Between Phases | |||
| Basics.Units.Area | A_phaseBorder | volume.geo.A_hor*100 | Heat transfer area at phase border |
| Basics.Units.CoefficientOfHeatTransfer | alpha_ph | 500 | HTC of the phase border |
| Real | expHT_phases | 0 | Exponent for volume dependency on inter phase HT |
| Phase Separation › Numerical Robustness | |||
| Modelica.Blocks.Types.Smoothness | smoothness | Modelica.Blocks.Types.Smoothness.LinearSegments | Smoothness of table interpolation for calculation of filling level |
| Initialisation › Volume | |||
| Boolean | useHomotopy | simCenter.useHomotopy | True, if homotopy method is used during initialisation |
| Basics.Units.EnthalpyMassSpecific | h_liq_start | -10 + TILMedia.VLEFluid.MixtureCompatible.Functions.bubbleSpecificEnthalpy_pxi(medium, volume.p_start) | Start value of liquid specific enthalpy |
| Basics.Units.EnthalpyMassSpecific | h_vap_start | +10 + TILMedia.VLEFluid.MixtureCompatible.Functions.dewSpecificEnthalpy_pxi(medium, volume.p_start) | Start value of vapour specific enthalpy |
| ClaRa.Basics.Units.Pressure | p_start | 1e5 | Start value of sytsem pressure |
| Real | level_rel_start | 0.5 | Initial filling level |
| Integer | initOption | 211 | Type of initialisation |
| Initialisation › Wall | |||
| Modelica.Units.SI.Temperature[wall.N_rad] | T_wall_start | ones(wall.N_rad)*293.15 | Start values of wall temperature inner --> outer |
| Integer | initOptionWall | 213 | Initialisation option for wall |
| Initialisation › Insulation | |||
| Integer | initOptionInsulation | 213 | Type of initialisation |
| ClaRa.Basics.Units.Temperature | T_startInsulation | 293.15 | Start values of wall temperature |
| Nominal Values | |||
| ClaRa.Basics.Units.Pressure | p_nom | 1e5 | Nominal pressure |
| ClaRa.Basics.Units.MassFlowRate | m_flow_nom | 10 | Nominal mass flow rate at riser inlet |
| Heat Losses | |||
| Boolean | enableAmbientLosses | false | Include heat losses to environment |
| Real | CF_lambda | 1 | Time-dependent correction factor for thermal conductivity of the wall |
| Summary and Visualisation | |||
| Boolean | showExpertSummary | simCenter.showExpertSummary | True, if expert summary should be applied |
| Boolean | showData | true | True, if a data port containing p,T,h,s,m_flow shall be shown |
| Boolean | showLevel | false | True, if level shall be visualised |
| Boolean | levelOutput | false | True, if Real level connector shall be addded |
| Boolean | outputAbs | false | True, if absolute level is at output |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Basics.Interfaces.FluidPortOut | sat | Saturated steam outlet | |
| Basics.Interfaces.FluidPortOut | down_1 | Downcomer outlet | |
| Basics.Interfaces.FluidPortIn | feed | Feedwater inlet | |
| Basics.Interfaces.FluidPortIn | riser_1 | Riser inlet | |
| Basics.Interfaces.EyeOut[3] | eye_down | ||
| Basics.Interfaces.EyeOut | eye_sat | ||
| Modelica.Blocks.Interfaces.RealOutput | level | if outputAbs then summary.outline.level_abs else summary.outline.level_rel | |
| Basics.Interfaces.FluidPortOut | down_2 | Downcomer outlet | |
| Basics.Interfaces.FluidPortOut | down_3 | Downcomer outlet | |
| Basics.Interfaces.FluidPortIn | riser_2 | Riser inlet | |
| Basics.Interfaces.FluidPortIn | riser_3 | Riser inlet |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| String | complexity (from ComplexityLevel) | "??" | |
| ClaRa.SimCenter | simCenter | ||
| ClaRa.Basics.Units.CoefficientOfHeatTransfer | alpha_prescribed | 8 | Prescribed heat transfer coefficient |
| ClaRa.Basics.Units.Temperature | T_amb | simCenter.T_amb | Temperature of surrounding medium |
| Summary | summary | ||
| Basics.ControlVolumes.FluidVolumes.VolumeVLE_L3_TwoZonesNPort | volume | ||
| ClaRa.Basics.ControlVolumes.SolidVolumes.CylindricalThickWall_L4 | wall | ||
| Adapters.Scalar2VectorHeatPort | scalar2VectorHeatPort | ||
| Basics.ControlVolumes.SolidVolumes.CylindricalThinWall_L4 | insulation | ||
| Modelica.Blocks.Sources.RealExpression | heatFlowRatePrescribedAlpha | ||
| BoundaryConditions.PrescribedHeatFlow | prescribedHeatFlow |
Contents
| Name | Description |
|---|---|
 material | |
 insulationMaterial | |
 PressureLoss | |
 HeatTransfer | |
 Outline | |
 Wall | |
 Summary |
Revisions
For revisions please consult the html-documentation shipped with ClaRa.