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Degenerate Surfaces EnergyPlus

asked 2018-11-12 12:28:27 -0600

tanushree gravatar image

updated 2018-11-12 13:25:09 -0600


My simulation is crashing quite frequently due to one Degenerate surface, that is the only severe warning I get. I checked the IDF editor, there are no surfaces with 3 or less vertices. Is there a way to locate and delete the degenerate surface?

I can attach my IDF file if needed.

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answered 2018-11-12 12:56:51 -0600

updated 2018-11-12 12:58:53 -0600

If you're using OpenStudio, in SketchUp, tun the OSM Diagnostic Script: Extensions -> OpenStudio User Scripts -> Reports -> OSM Diagnostic Script

That includes the option to delete problematic surfaces, but you probably want to try finding and fixing them first as the auto-remove may mess up surface matching.

If in raw EnergyPlus, enable Output:Diagnostics,DisplayExtraWarnings for more detail on the degenerate surfaces.

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I added the Output:Diagnostics,DisplayExtraWarnings, however it does not point out the degenerate surface. The error message I receive is:

* Warning * GetSurfaceData: There are 2 coincident/collinear vertices; These have been deleted unless the deletion would bring the number of surface sides < 3. * ~~~ * For explicit details on each problem surface, use Output:Diagnostics,DisplayExtraWarnings; * Severe * GetSurfaceData: There are 1 degenerate surfaces; Degenerate surfaces are those with number of sides < 3

tanushree gravatar imagetanushree ( 2018-11-12 17:03:00 -0600 )edit

link to the model

mdahlhausen gravatar imagemdahlhausen ( 2018-11-12 21:45:55 -0600 )edit

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Asked: 2018-11-12 12:28:27 -0600

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Last updated: Nov 12 '18