modelHalfWall
Information
This component models the thermal response of half wall in interface with a rest ambiance where the thermal exchanges are mainly driven by natural convection and radiation.
This component is an assembly of the PartialWall module, the FreeConvection module and a CarrollRadiation module. The solid wall is dicretises in N along its depth to model the heat propagation. By defaut the value of N is computed from the depth and the thermal diffusivty of the wall. When the number of layers N is equal to one, the PartialWall is replaced by a HeatCapacitor.
A port name port_surface is connected to the boundary port of the PartialWall. It can be usefull for specific applications when another modules is required et can be latter connected to this empty heat port.
The HalfWall supplies as output the surface area of the wall, via its A_wall port, to the FviewCalculator module and get from this last the form (or view) factor as input via the F_view port. The connection is performed explicitely via the graphic connectors.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Meshing properties | |||
| MeshGrid | mesh | MeshGrid.biotAndGeometricalGrowth | Selection of meshing function |
| Real | q | 1.2 | Growth rate (if geometricalGrowth chosen) |
| Modelica.SIunits.CoefficientOfHeatTransfer | h | 10 | Decoupled value of the heat transfer (if biot segment chosen) |
| Integer | N | integer(max(1, 5*Th/0.2*1e-6*d*cp/k)) | Number of layers : 1 to 65535 |
| Geometrical properties | |||
| Modelica.SIunits.Area | A | 0 | Wall area |
| Modelica.SIunits.Height | Lc | 0 | Wall characteristic length |
| Modelica.SIunits.Length | Th | 0 | Wall thickness |
| Dynamic properties | |||
| Dynamics | energyDynamics | Dynamics.SteadyStateInitial | Formulation of energy balance |
| Modelica.SIunits.Temperature | T_start | 293.15 | Start value for temperature, if energyDynamics = FixedInitial |
| Thermal properties | |||
| Modelica.SIunits.SpecificHeatCapacity | cp | 0 | Wall specific heat capacity |
| Modelica.SIunits.Density | d | 0 | Wall density |
| Modelica.SIunits.ThermalConductivity | k | 0 | Wall conductivity |
| Convection properties | |||
| Real | add_on_conv | 1 | Custom add-on |
| TAeZoSysPro.HeatTransfer.Types.FreeConvectionCorrelation | correlation | Correlations.vertical_plate_ASHRAE | free convection Correlation |
| Modelica.SIunits.CoefficientOfHeatTransfer | h_cv_const | 0 | constant heat transfer coefficient (optional: if correlation 'Constant' choosen) |
| Radiative properties | |||
| Modelica.SIunits.Emissivity | eps | 0 | Wall emissivity |
| Real | add_on_rad | 1 | Custom add-on |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | port_a_conv | ||
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | port_a_rad | ||
| Modelica.Blocks.Interfaces.RealOutput | A_wall | ||
| Modelica.Blocks.Interfaces.RealInput | F_view | ||
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b | port_b | ||
| TAeZoSysPro.HeatTransfer.Interfaces.HeatPort_a | port_surface |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.SIunits.BiotNumber | Bi | ||
| TAeZoSysPro.HeatTransfer.BasesClasses.PartialWall | partialWall | ||
| TAeZoSysPro.HeatTransfer.BasesClasses.FreeConvection | convection | ||
| TAeZoSysPro.HeatTransfer.BasesClasses.CarrollRadiation | carrollRadiation | ||
| TAeZoSysPro.HeatTransfer.BasesClasses.HeatCapacitor | heatCapacitor |
Contents
| Name | Description |
|---|---|
 Medium |