[EnergyPlus_Support] Re: shadowing calc errors

["coolshadow10a" <david@xxxxxxxxxxxxxx>]

Note that this error usually occurs when there are overlapping or
duplicate shading surfaces.  No matter how many iterations you allow,
overlapping shading surfaces shade each other infinitely (I would
think).  You need to check your model carefully for repeat geometry
with different surface names or for overlapping shading surfaces.  You
will need a IDF geometry viewer to do this, or compare vertices in a diff.

rds3

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "bish.dj61" <bish.dj@...>
wrote:
>
> OK, I've looked at the results of adding the diagnostic statement - 
> great to remove warnings, but the shading doesn't work. Any help 
> appreciated!
> 
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Danny Bishop" 
> <bish.dj@> wrote:
> >
> > Hi All
> > I have some errors that I can't figure out what they mean. I did as 
> it
> > suggested and added the diagnostics statement, but I am not really 
> sure what
> > it is doing.
> > 
> > ******** Too many vertices [>=18] in shadow overlap errors 
> occurring...
> >    ************* These occur throughout the year and may occur 
> several times
> > for the same surfaces. You may be able to reduce them by adding
> > DIAGNOSTICS,DoNotMirrorDetachedShading;
> >    *************
> >    ** Warning ** Too many vertices [>=18] in a shadow overlap
> >    **   ~~~   ** Overlapping figure=Mir-OBJ:0169, Surface Class=
> [Detached
> > Shading:Building]
> >    **   ~~~   **   This error occurred 1 times.
> >    **   ~~~   ** Figure being Overlapped=Mir-OBJ:0201, Surface
> > Class=[Detached Shading:Building]
> >    *************
> > 
> > AND
> > 
> > ******** Too many figures [>=15000] in shadow overlap errors 
> occurring...
> >    ************* These occur throughout the year and may occur 
> several times
> > for the same surfaces. You may be able to reduce them by adding
> > DIAGNOSTICS,DoNotMirrorDetachedShading;
> >    *************
> >    ** Warning ** Too many figures [>=15000] in a shadow overlap
> >    **   ~~~   ** Overlapping figure=OBJ:0217, Surface Class=
> [Detached
> > Shading:Building]
> >    **   ~~~   **   This error occurred 5 times.
> >    **   ~~~   ** Figure being Overlapped=Mir-OBJ:0081, Surface
> > Class=[Detached Shading:Building]
> >    **   ~~~   ** Figure being Overlapped=OBJ:0024, Surface Class=
> [Wall]
> >    **   ~~~   ** Figure being Overlapped=OBJ:0306, Surface Class=
> [Wall]
> >    *************
> > 
> > Cheers/Danny
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
>



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