modelInteriorHeatTransferConvective
Model for heat convection at the interior surface of a window that may have a shading device
Extends from BaseClasses.PartialWindowBoundaryCondition (Partial model for heat convection or radiation between a possibly shaded window that can be outside or inside the room).
Information
Model for the convective heat transfer between a window shade, a window surface and the room air. This model is applicable for the room-facing surface of a window system and can be used with the model Buildings.HeatTransfer.Windows.Window.
This model adds the convective heat transfer coefficient to its base model.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Area | A (from PartialWindowBoundaryCondition) | Heat transfer area of frame and window | |
| Real | fFra (from PartialWindowBoundaryCondition) | Fraction of window frame divided by total window area | |
| Modelica.Units.SI.Area | AFra (from PartialWindowBoundaryCondition) | fFra*A | Frame area |
| Modelica.Units.SI.Area | AGla (from PartialWindowBoundaryCondition) | A - AFra | Glass area |
| Modelica.Units.SI.CoefficientOfHeatTransfer | hFixed | 4 | Constant convection coefficient |
| Types.InteriorConvection | conMod | Buildings.HeatTransfer.Types.InteriorConvection.Fixed | Convective heat transfer model |
| Modelica.Units.SI.Angle | til | Surface tilt | |
| Shading | |||
| Boolean | haveExteriorShade (from PartialWindowBoundaryCondition) | Set to true if window has exterior shade (at surface a) | |
| Boolean | haveInteriorShade (from PartialWindowBoundaryCondition) | Set to true if window has interior shade (at surface b) | |
| Boolean | haveShade (from PartialWindowBoundaryCondition) | haveExteriorShade or haveInteriorShade | Set to true if window system has a shade |
| Boolean | thisSideHasShade (from PartialWindowBoundaryCondition) | Set to true if this side of the model has a shade | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | uSha (from PartialWindowBoundaryCondition) | Input connector, used to scale the surface area to take into account an operable shading device, 0: unshaded; 1: fully shaded | |
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | air (from PartialWindowBoundaryCondition) | Port that connects to the air (room or outside) | |
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b | glaUns (from PartialWindowBoundaryCondition) | Heat port that connects to unshaded part of glass | |
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b | glaSha (from PartialWindowBoundaryCondition) | Heat port that connects to shaded part of glass | |
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | frame (from PartialWindowBoundaryCondition) | Heat port at window frame | |
| Modelica.Blocks.Interfaces.RealInput | QRadAbs_flow | Total net radiation that is absorbed by the shade (positive if absorbed) | |
| Modelica.Blocks.Interfaces.RealOutput | TSha | Shade temperature |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.HeatTransfer.Windows.BaseClasses.InteriorConvectionCoefficient | conCoeGla | Model for the inside convective heat transfer coefficient of the glass | |
| BaseClasses.ShadeConvection | conSha | Convection model for shade | |
| BaseClasses.InteriorConvection | conFra | Convective heat transfer between air and frame | |
| BaseClasses.InteriorConvection | conWinUns | Convection from unshaded part of window to outside or room air |
Revisions
-
March 2, 2015, by Michael Wetter:
Refactored model to allow a temperature dependent convective heat transfer on the room side. This is for issue 52. -
July 11, 2013, by Michael Wetter:
First implementation.