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RE: [EnergyPlus_Support] On Vertex coordinates

Please see,
 
GlobalGeometryRules   on Page 147  of the I/O reference manual.
 
Typical example:-

!-   ===========  ALL OBJECTS IN CLASS: SURFACEGEOMETRY ===========
 
  GlobalGeometryRules,
    LowerLeftCorner,         !- Starting Vertex Position  (UpperLeftCorner,)
    Counterclockwise,        !- Vertex Entry Direction   (Clockwise,)
    World;                   !- Coordinate System   (Relative;)

 
The alternative entries are shown above in (    ).  Note the last name is terminated in ';'.  End of the object.
 
Error (1) Clockwise or CounterClockwise rule not followed.
 
Error (2) Area of the window is larger then the base.
 
Error (3) No window area.
 
Hope this will help.
 
Dr. Li.




To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: sw.peng@xxxxxxxx
Date: Tue, 27 Jan 2009 21:35:14 +0000
Subject: [EnergyPlus_Support] On Vertex coordinates



Hi,

Here is another problem on runing Exercise 1B of EnergyPlus 3.0:

I added two windows as example suggested: East Window and
West Window, but I got some fatal error and the program terminated,
The error is

1) GetSurfaces: Some Outward Facing angles of subsurfaces differ
significantly from base surface;

2) GetSurfaceData: Zero or negative surface area, Surface=WEST
WINDOW;

3) CalcSurfaceCentroid: zero area surface, for surface=WEST
WINDOW;

I guess the problem is from window vertex input. The manual mentions
the vertes should follow the rules specified in "SurfaceGeometry object"
but I can't find this object. Can someone explain what's the rules for
window vertex and tell me where is the object?

Thanks

S.W. Peng



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