modelSideFins
Vertical side fins next to windows
Extends from IDEAS.Buildings.Components.Shading.Interfaces.PartialShadingDevice.
Information
Shading model of side fins (or similar objects) next to a window where hWin is the window height, wWin is the window width, gap equals the horizontal distances between the window edges and the side fins, dep fin length in the direction normal to the window.
Assumption and limitations
This model computes a simplified view factor of the side fins. The view factor determines how much diffuse light is blocked by the fins. We assume that the fins do not reflect light towards the window.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | controlled (from PartialShading) | true | if true, shading has a control input |
| Modelica.Units.SI.Area | A_glazing (from PartialShading) | Surface area of the glazing | |
| Modelica.Units.SI.Area | A_frame (from PartialShading) | Surface area of the frame | |
| Modelica.Units.SI.Angle | inc (from PartialShading) | Surface inclination | |
| Modelica.Units.SI.Temperature | Tenv_nom (from PartialShading) | 280 | Nominal temperature of environment |
| Modelica.Units.SI.Emissivity | epsSw_frame (from PartialShading) | Short wave solar absorption coefficient of the frame | |
| Modelica.Units.SI.Emissivity | epsLw_frame (from PartialShading) | Long wave solar absorption coefficient of the frame | |
| Modelica.Units.SI.Emissivity | epsLw_glazing (from PartialShading) | Long wave solar absorption coefficient of the glazing | |
| Modelica.Units.SI.Emissivity | epsSw_shading (from PartialShading) | 0.8 | Short wave emissivity of the shading object |
| Real | g_glazing (from PartialShading) | Nominal shading coefficient of the glazing | |
| Boolean | linCon (from PartialShading) | false | Linearise convective heat transfer |
| Boolean | linRad (from PartialShading) | false | Linearise radiative heat transfer |
| Boolean | haveBoundaryPorts (from PartialShading) | true | Include ports for setting boundary conditions |
| Boolean | haveFrame (from PartialShading) | A_frame*epsLw_frame > 0 | Frame enabled |
| Modelica.Units.SI.CoefficientOfHeatTransfer | hSha (from PartialShading) | 12 | Equivalent thermal conductance of the shading device |
| Real | fraSunDif | 1 - 2*vieAngFin/Modelica.Constants.pi | Fraction of window area exposed to diffuse sun light |
| Window properties | |||
| Modelica.Units.SI.Angle | azi (from PartialShading) | Window azimuth angle | |
| Modelica.Units.SI.Length | hWin | Window height | |
| Modelica.Units.SI.Length | wWin | Window width | |
| Side fin properties | |||
| Modelica.Units.SI.Length | hFin | Height of side fin above window | |
| Modelica.Units.SI.Length | dep | Side fin depth perpendicular to the wall plane | |
| Modelica.Units.SI.Length | gap | Vertical distance between side fin and window | |