Re: [EnergyPlus_Support] VertexEntry - Surface Geometry -- retract

["Michael J. Witte" <mjwitte@xxxxxxxx>]

As Linda said, CW vs CCW will change the facing direction of the surface.  To 
check the resulting azimuth and tilt for all surfaces, add this command to your 
input file:

Report, Surfaces, Details;

This produces a list of each surface in the eio output file which includes 
azimuth, tilt, area, etc.  It is comma delimited and most easily read by 
putting into Excel or the like.

Mike


On 20 Sep 2004, at 15:45, Linda Lawrie wrote:

> 
> At 11:02 PM 9/19/2004, Tim Britton wrote:
> >How crucial is it to enter all surfaces according to the VertexEntry field (ie
> >as either clockwise or anticlockwise) under Surface Geometry ? I am exporting
> >from Ecotect to EnergyPlus and the vertices of some surfaces are listed as
> >clockwise while others are listed as anticlockwise after exporting the idf file
> >to EnergyPlus. Is it necessary to correct the file so that all surfaces are
> >entered all the same or can it be left with some surfaces as clockwise and
> >others as anticlockwise?
> 
> What I said before is WRONG.  It always makes a difference if you're 
> telling EnergyPlus that you're putting  things in CW and end up CCW or vice
> versa. -- The difference, of course, is the facing direction and whether you've
> got it correct or not.  I'm working on a method so I can tell if you're putting
> them in incorrectly (and then will issue a warning as well as correct the
> problem -- but not for this release 1.2.1)
> 
> What I should have said is that the starting "corner" may be able to be 
> changed -- If it's a flat surface (ceiling, roof or floor), then it may not
> matter.  If it's a wall, it does matter, I believe.
> 
> If I were you and Ecotect is not giving you the proper translation, I would
> certainly bring it to their attention.
> 
> 
> Linda
> 
> EnergyPlus WebSite: http://www.energyplus.gov
> Owner: EnergyPlus_Support list
> Member: EnergyPlus Development Team
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
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> in the Files area of the Support Web Site.
> 
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> 
> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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