modelSideFins
Extends from Buildings.ThermalZones.Detailed.BaseClasses.SideFins (Record for window side fins), Buildings.HeatTransfer.Windows.BaseClasses.PartialShade_weatherBus (Partial model to implement overhang and side fins with weather bus connector).
Information
For a window with side fins, this model outputs the fraction of
the area that is exposed to the sun.
The model calculates the fraction of the window area that is exposed to the sun.
The side fins are symmetrically placed above the vertical window centerline,
and its height must be equal or greater than the window height.
This models can also be used for doors with side fins.
The figure below shows the parameters. The parameter h is measured
from the top of the window to the top of the side fins.
Side fins are assumed to extend at least to the lower edge of the window.
(Any portion of the side fin below the window edge does not cast
as shadow on the window anyway.)
The parameter h is measured
from the top of the window to the top of the side fins.
The side fin must extend at least to the bottom of the window.
Limitations
The model assumes that- the side fins are placed symmetrically to the left and right of the window,
- the top of the side fins must be at an equal or greater height than the window, and
- the bottom of the side fins must be at an equal or lower height than the bottom of the window.
Implementation
The detailed calculation method is explained in Buildings.HeatTransfer.Windows.BaseClasses.SideFins.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | haveSideFins (from SideFins) | dep > Modelica.Constants.eps | Flag, true if the window has side fins |
| General › Side fin | |||
| Modelica.Units.SI.Length | h (from SideFins) | Height of side fin that extends above window, measured from top of window | |
| Modelica.Units.SI.Length | dep (from SideFins) | Side fin depth (measured perpendicular to the wall plane) | |
| Modelica.Units.SI.Length | gap (from SideFins) | Distance between side fin and window edge | |
| General › Window | |||
| Modelica.Units.SI.Length | hWin (from PartialShade_weatherBus) | Window height | |
| Modelica.Units.SI.Length | wWin (from PartialShade_weatherBus) | Window width | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.BoundaryConditions.WeatherData.Bus | weaBus (from ShadeInterface_weatherBus) | Weather data bus | |
| Modelica.Blocks.Interfaces.RealInput | incAng (from ShadeInterface_weatherBus) | Solar incidence angle | |
| Modelica.Blocks.Interfaces.RealInput | HDirTilUns (from ShadeInterface_weatherBus) | Direct solar irradiation on tilted, unshaded surface | |
| Modelica.Blocks.Interfaces.RealOutput | HDirTil (from ShadeInterface_weatherBus) | Direct solar irradiation on tilted, shaded surface | |
| Modelica.Blocks.Interfaces.RealOutput | fraSun (from ShadeInterface_weatherBus) | Fraction of the area that is unshaded |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.HeatTransfer.Windows.BaseClasses.SideFins | fin | Window side fins |
Revisions
-
July 5, 2012, by Michael Wetter:
Changed definitions of side fin heighthto be measured from the top of the window. This allows changing the window height without having to adjust the side fin parameters. -
February 25, 2012, by Michael Wetter:
Revised implementation. -
Feb 01, 2012, by Kaustubh Phalak
First implementation.