Re: [EnergyPlus_Support] Heat Transfer Surface geometry

[Linda Lawrie <linda@xxxxxxxxxx>]

At 02:17 PM 7/12/2006, aboyemeplus wrote:

>1) All roofs/floors with more than 4 sides do not appear on the
>graphical representation of the building model. Is this due to loss of
>information when data is translated from EnergyPlus to CAD? Has anyone
>else experienced this situation?

They are there -- by default if you use DXF reporting, they appear as 
thick lines.   If you want you can ask for triangulation and they 
will appear as "faces".


>2) I am modeling the floors of a "Plenum Zone" as the respective
>ceilings of the zones below. In other words, I am using the same
>vertice coordinates for both surfaces but I am designating their
>surface types as Ceiling and Floor. EnergyPlus calculates the Tilt
>angle of the floors as 0.0 instead of 180. On pg 129 of the I/O
>reference, it is stated that any vertex can be chosen as the starting
>position for horizontal surfaces, as long as the VertexEntry
>convention is followed. Are there other parameters beside "surface
>type" and "vertice coordinates" used in coming up with the tilt angle
>of a surface? Don't quite understand why the floors have tilt angles
>of 0.0.

You are possibly inputting them counter clock wise rather than 
clockwise or vice versa.  It used the coordinates and calculates the 
"outward facing normal" angle to determine the tilt angle -- it does 
not depend on surface type for this.


Linda

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



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