Re: [EnergyPlus_Support] Too many figures in shadow overlap errors

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

To all:  My apologies for the slow response to many of the July requests.  We 
are working on catching up.

This error means that the shadowing calculations have overrun some predefined 
limits on the number of overalapping shadows on a single surface.  In the 
SHADOWING CALCULATIONS object, there is a second field "Max_figures_shadow" 
which allows you to increase this limit.  The default is 15000.  Try a large 
value, such as 20000, and see if this solves the problem.

Mike


On 12 Jul 2007 at 16:24, davidedelloro wrote:

> Dear All,
>   I am simulating an office building in Milan.
> When I run a yearly simulation I find the following warning:
> 
>  ************* ===== Recurring Surface Error Summary =====
>    ************* The following surface error messages occurred.
>    *************
>    ************* Too many figures in shadow overlap errors occuring...
>    ************* 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 in a shadow overlap
>    **   ~~~   ** Overlapping figure=003>006>O1>WF0, Surface Class=[Wall]
>    **   ~~~   **   This error occurred 10 times.
>    **   ~~~   ** Figure being Overlapped=009-03E, Surface Class=[Wall]
>    *************
>    **   ~~~   **   The too many figures errors occurred 10 times (total).
>    *************
>    ************* EnergyPlus Completed Successfully-- 10 Warning; 0
> Severe Errors; Elapsed Time=00hr 03min 33.00sec
> 
> I don't really understand what this warning means and how it affects
> the results of the simulation. 
> These two walls are both aligned vertically (ideally they can be on
> the same vertical plane), but 009-03E is an exterior wall of the 4th
> floor and 003>006>O1>WF0 is an interior surface located at the 2nd floor.
> 
> I try to erase all my shading elements, but I still have the same warning.
> Thanks for your help
> --Davide
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the
> Documentation link and press the "search" button.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 


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





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