modelExteriorHeatTransfer
Model for heat convection and radiation at the exterior surface of a window that may have a shading device
Extends from BaseClasses.PartialWindowBoundaryCondition.
Information
Model for the convective heat transfer between a window shade, a window surface and the room air. This model is applicable for the outside-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 |
|---|---|---|---|
| Boolean | linearizeRadiation | Set to true to linearize emissive power | |
| Real | vieFacSky | View factor from receiving surface to sky | |
| Shading | |||
| Modelica.Units.SI.Emissivity | absIRSha_air | Infrared absorptivity of shade surface that faces air | |
| Modelica.Units.SI.Emissivity | absIRSha_glass | Infrared absorptivity of shade surface that faces glass | |
| Modelica.Units.SI.TransmissionCoefficient | tauIRSha_air | Infrared transmissivity of shade for radiation coming from the exterior or the room | |
| Modelica.Units.SI.TransmissionCoefficient | tauIRSha_glass | Infrared transmissivity of shade for radiation coming from the glass | |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | vWin | Wind speed | |
| Buildings.HeatTransfer.Windows.BaseClasses.ExteriorConvectionCoefficient | conCoeGla | Model for the outside convective heat transfer coefficient of the glass | |
| Buildings.HeatTransfer.Windows.BaseClasses.ExteriorConvectionCoefficient | conCoeFra | Model for the outside convective heat transfer coefficient of the frame | |
| Radiosity.OutdoorRadiosity | radOut | Outdoor radiosity | |
| Modelica.Blocks.Interfaces.RealInput | TBlaSky | Black body sky temperature | |
| Modelica.Blocks.Interfaces.RealInput | TOut | Outside temperature | |
| Interfaces.RadiosityOutflow | JOutUns | Outgoing radiosity that connects to unshaded part of glass | |
| Interfaces.RadiosityInflow | JInUns | Incoming radiosity that connects to unshaded part of glass | |
| Interfaces.RadiosityOutflow | JOutSha | Outgoing radiosity that connects to shaded part of glass | |
| Interfaces.RadiosityInflow | JInSha | Incoming radiosity that connects to shaded part of glass | |
| Modelica.Blocks.Interfaces.RealInput | QSolAbs_flow | Solar radiation absorbed by shade | |
| BaseClasses.ShadeRadiation | shaRad | Radiative heat balance of shade | |
| Modelica.Thermal.HeatTransfer.Components.Convection | conFra | Convective heat transfer between air and frame | |
| Modelica.Thermal.HeatTransfer.Components.Convection | 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. -
February 8 2012, by Michael Wetter:
Changed model to use new implementation of Buildings.HeatTransfer.Radiosity.OutdoorRadiosity. This change leads to the use of the same equations for the radiative heat transfer between window and ambient as is used for the opaque constructions. -
October 25 2010, by Michael Wetter:
First implementation.