blockWallSolarAzimuth
Angle measured in a horizontal plane between the projection of the sun's rays and the normal to a vertical surface
Extends from Modelica.Blocks.Icons.Block (Basic graphical layout of input/output block).
Information
This block computes the wall solar azimuth angle. It is the angle between the projection of the sun ray on a horizontal surface and the line perpendicular to the wall. The value of this angle varies from 0 to 180 degrees. In the northern hemisphere at solar noon, the value of the wall solar azimuth angle is zero if the wall is facing south.
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | incAng | Solar incidence angle | |
| Modelica.Blocks.Interfaces.RealInput | alt | Solar altitude angle (angle between sun ray and horizontal surface) | |
| Modelica.Blocks.Interfaces.RealOutput | verAzi | Angle between projection of sun's rays and normal to vertical surface |
Revisions
-
July 5, 2012, by Michael Wetter:
DecreaseddeltaXfrom 1e-3 to 1e-4, as the looser tolerance gives sharp changes in AixLib.HeatTransfer.Windows.BaseClasses.Examples.Overhang. -
February 23, 2012, by Michael Wetter:
Guarded against division by zero because the altitude angle can be 90 degree in the tropics, and hence its cosine can take on zero. -
Feb 01, 2012, by Kaustubh Phalak
First implementation.