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Re: [EnergyPlus_Support] description of shading surfaces

At 03:42 AM 11/25/2005, Arno Dentel wrote:
>How important is the starting corner and the vertex entry for shading
>surfaces?

As important as it is for walls, generally.

>The IO-Reference means: EnergyPlus mirrors automatically the surface.

This means that you don't have to be as careful of which way the 
shading "faces" as only things behind the shading surface can be shaded.

>Are the chosen entries SurfaceStartingPostion and VertexEntry valid for
>any shading surface? Is there a difference between horizontal and tilted
>surfaces?

Yes, these are valid and the same as for walls, etc.

>And is there difference in the geometrical description between detached
>and attached ones?

If you choose "relative" coordinates in your Surface Geometry object, 
yes.  Then, the attached entries are relative to the zone origin 
coordinates.  But always, the vertex entries are "3D".


Linda

EnergyPlus WebSite: http://www.energyplus.gov
Owner: EnergyPlus_Support list
Member: EnergyPlus Development Team



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