.Buildings.HeatTransfer.Windows.SideFins

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 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.

Revisions

• July 5, 2012, by Michael Wetter:
  Changed definitions of side fin height h to 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.