This model outputs the fraction of the window area that is sun exposed
for a window that may have an overhang and sidefins.
Depending on the record with construction data
an overhang, side fins or no external shade is modeled.
The model allows having an overhang and side fins at the same time.
In such a case, the overhang width should be
measured from the window edge to the sidefin,
because the overhang width beyond the sidefin will
cast a shadow on the side fin and not on the window.
Similarly, the side fin height should be measured
from the upper window edge to the overhang,
because the side fin height above the
overhang will not cast a shadow on the window.
The parameters for the dimensions of the overhang and side fins are as
described in the models
For overhangs, the model assumes that
For side fins, the model assumes that
The detailed calculation method is explained in Buildings.HeatTransfer.Windows.BaseClasses.SideFins and in Buildings.HeatTransfer.Windows.BaseClasses.Overhang.
latbecause the latitude is now obtained from the weather data bus.
FixedShadebecause shade is already used for window interior and exterior shades.
Buildings.HeatTransfer.Windows, because the overhang and side fin models are also in this package.