modelFeedWaterTank_L3
Feedwater tank : separated volume approach | level-dependent phase separation
Extends from ClaRa.Components.MechanicalSeparation.FeedWaterTank_base (Base class for feedwater tanks), 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 |
|---|---|---|---|
| ClaRa.Basics.Units.MassFraction | steamQuality_start (from FeedWaterTank_base) | (1 - level_rel_start)*TILMedia.VLEFluid.MixtureCompatible.Functions.dewDensity_pxi(medium, p_start)/((1 - level_rel_start)*TILMedia.VLEFluid.MixtureCompatible.Functions.dewDensity_pxi(medium, p_start) + level_rel_start*TILMedia.VLEFluid.MixtureCompatible.Functions.bubbleDensity_pxi(medium, p_start)) | Initial steam quality |
| Fundamental Definitions | |||
| TILMedia.VLEFluid.Types.BaseVLEFluid | medium (from FeedWaterTank_base) | simCenter.fluid1 | Medium in the component |
| Boolean | includeInsulation | false | True, if insulation is included |
| Geometry | |||
| Modelica.Units.SI.Length | diameter (from FeedWaterTank_base) | 1 | Diameter of the component |
| Modelica.Units.SI.Length | length (from FeedWaterTank_base) | 1 | Length of the component |
| Basics.Choices.GeometryOrientation | orientation (from FeedWaterTank_base) | ClaRa.Basics.Choices.GeometryOrientation.vertical | Orientation of the component |
| ClaRa.Basics.Units.Length | thickness_wall | 0.005*diameter | Thickness of the cylinder wall |
| ClaRa.Basics.Units.Length | thickness_insulation | 0.02 | Thickness of the insulation |
| Modelica.Units.SI.Length | radius_flange | 0.05 | Flange radius |
| Basics.Units.Length | z_tapping | 0 | position of tapping flange |
| Basics.Units.Length | z_condensate | 0.1 | position of condensate flange |
| Basics.Units.Length | z_aux | 0.1 | position of auxilliary flange |
| Basics.Units.Length | z_feedwater | 0 | position of feedwater flange |
| Basics.Units.Length | z_vent | 0.1 | position of vent flange |
| ClaRa.Basics.Units.Mass | mass_struc | 0 | Mass of internal structure addtional to feedwater tank wall |
| Nominal Values | |||
| Modelica.Units.SI.MassFlowRate | m_flow_cond_nom (from FeedWaterTank_base) | Nominal condensat flow | |
| Modelica.Units.SI.MassFlowRate | m_flow_heat_nom (from FeedWaterTank_base) | Nominal heating steam flow | |
| Modelica.Units.SI.Pressure | p_nom (from FeedWaterTank_base) | 1e5 | Nominal pressure |
| Modelica.Units.SI.SpecificEnthalpy | h_nom (from FeedWaterTank_base) | 1e5 | Nominal specific enthalpy |
| Initialisation | |||
| Boolean | useHomotopy (from FeedWaterTank_base) | simCenter.useHomotopy | True, if homotopy method is used during initialisation |
| Modelica.Units.SI.Pressure | p_start (from FeedWaterTank_base) | 1e5 | Start value of sytsem pressure |
| Real | level_rel_start (from FeedWaterTank_base) | Initial filling level | |
| 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 |
| Integer | initOption | 211 | Type of initialisation |
| Summary and Visualisation | |||
| Boolean | showExpertSummary (from FeedWaterTank_base) | simCenter.showExpertSummary | True, if expert summary should be applied |
| Boolean | showData (from FeedWaterTank_base) | true | True, if a data port containing p,T,h,s,m_flow shall be shown |
| Boolean | showLevel (from FeedWaterTank_base) | false | True, if level shall be visualised |
| Boolean | levelOutput (from FeedWaterTank_base) | false | True, if Real level connector shall be addded |
| Boolean | outputAbs (from FeedWaterTank_base) | false | True, if absolute level is at output |
| Phase Separation › Mass Transfer Between Phases | |||
| Basics.Units.Time | Tau_cond | 10 | 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 › 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 | 1 | 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 |
| Heat Losses | |||
| Boolean | enableAmbientLosses | false | Include heat losses to environment |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| ClaRa.Basics.Interfaces.FluidPortOut | feedwater (from FeedWaterTank_base) | Feedwater | |
| ClaRa.Basics.Interfaces.FluidPortIn | heatingSteam (from FeedWaterTank_base) | Heating steam inlet | |
| ClaRa.Basics.Interfaces.FluidPortIn | condensate (from FeedWaterTank_base) | Main condensate inlet | |
| ClaRa.Basics.Interfaces.EyeOut | eye (from FeedWaterTank_base) | ||
| Basics.Interfaces.FluidPortOut | vent | ||
| Basics.Interfaces.EyeOut | eye_sat | ||
| Basics.Interfaces.FluidPortIn | aux | Auxilliary inlet | |
| Modelica.Blocks.Interfaces.RealOutput | level | if outputAbs then summary.outline.level_abs else summary.outline.level_rel |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| ClaRa.SimCenter | simCenter (from FeedWaterTank_base) | ||
| String | complexity (from ComplexityLevel) | "??" | |
| 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 | ||
| BoundaryConditions.PrescribedHeatFlow | prescribedHeatFlow | ||
| Modelica.Blocks.Sources.RealExpression | heatFlowRatePrescribedAlpha |
Contents
| Name | Description |
|---|---|
 material | |
 insulationMaterial | |
 PressureLoss | |
 HeatTransfer | |
 Outline | |
 Wall | |
 Summary |
Revisions
For revisions please consult the html-documentation shipped with ClaRa.