modelNTU_plate_L3_standalone
A three-zonal NTU cell model with internally calculated zone size for plate geometry
Extends from ClaRa.Basics.Icons.NTU, 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:
ClaRa development team, Copyright © 2017 - 2022.References:
For references please consult the html-documentation shipped with ClaRa.
Remarks:
This component was developed for ClaRa library.
Acknowledgements:
CLA:
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.ThermalResistance | HR_nom | nTU.HR_nom | Nominal conductive heat resistance |
| Fundamental Definitions | |||
| TILMedia.VLEFluid.Types.BaseVLEFluid | medium_a | simCenter.fluid1 | Medium at outer side |
| TILMedia.VLEFluid.Types.BaseVLEFluid | medium_b | simCenter.fluid1 | Medium at inner side |
| Boolean | outerPhaseChange | true | True, if phase change may occur at outer side |
| Geometry | |||
| ClaRa.Basics.Units.Length | width | 1 | Plate width |
| ClaRa.Basics.Units.Length | length | 1 | Plate length |
| ClaRa.Basics.Units.Length | thickness_wall | 0.001 | Wall thickness |
| Integer | N_plates | 3 | Number of tubes in parallel |
| Real | mass_struc | 0 | Mass of inner structure elements, additional to the tubes itself |
| ClaRa.Basics.Units.Area | A_heat | (N_plates - 2)*width*length | Mean area of heat transfer |
| Real | CF_geo | 1 | Correction coefficient due to fins etc. |
| Initialisation | |||
| Integer | initOption | 0 | Thermal initialisation |
| ClaRa.Basics.Units.Temperature[3] | T_w_i_start | ones(3)*293.15 | Initial temperature at inner phase |
| ClaRa.Basics.Units.Temperature[3] | T_w_o_start | ones(3)*293.15 | Initial temperature at outer phase |
| Integer | initOption_yps | 3 | Volumetric initialisation |
| Real[2] | yps_start | {0, 0} | Initial area fraction 1phase | 2phase |
| Expert Settings | |||
| Real | gain_eff | 1 | Avoid effectiveness > 1, high gain_eff leads to stricter observation but may cause numeric errors |
| ClaRa.Basics.Units.Time | Tau_stab | 0.1 | Time constant for numeric stabilisation w.r.t. heat flow rates |
| Boolean | showExpertSummary | false | True,if expert summaries shall be shown |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| ClaRa.Basics.Interfaces.HeatPort_a[3] | outerPhase | outer side of cylinder | |
| ClaRa.Basics.Interfaces.HeatPort_a[3] | innerPhase | inner side of cylinder |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| ClaRa.SimCenter | simCenter | ||
| String | complexity (from ComplexityLevel) | "??" | |
| ClaRa.Basics.Units.Pressure | p_o | Pressure at outer side | |
| ClaRa.Basics.Units.Pressure | p_i | Pressure at inner side | |
| ClaRa.Basics.Units.EnthalpyMassSpecific | h_i_inlet | Inlet enthalpy of inner flow | |
| ClaRa.Basics.Units.EnthalpyMassSpecific | h_o_inlet | Inlet enthalpy of outer flow | |
| ClaRa.Basics.Units.MassFlowRate | m_flow_i | Mass flow rate of inner side | |
| ClaRa.Basics.Units.MassFlowRate | m_flow_o | Mass flow rate of outer side | |
| ClaRa.Basics.Units.MassFraction[medium_b.nc - 1] | xi_i | Mass fraction at outer side | |
| ClaRa.Basics.Units.MassFraction[medium_a.nc - 1] | xi_o | Mass fraction at outer side | |
| ClaRa.Basics.Units.CoefficientOfHeatTransfer[3] | alpha_i | Coefficient of heatTransfer for inner side for regions |A|B|C| | |
| ClaRa.Basics.Units.CoefficientOfHeatTransfer[3] | alpha_o | Coefficient of heatTransfer for outer side for regions |A|B|C| | |
| Summary | summary |
Contents
| Name | Description |
|---|---|
 Material | |
 HeatExchangerType | |
| HeatCapacityAveraging | |
 Summary | |
 ECom |
Revisions
For revisions please consult the html-documentation shipped with ClaRa.