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Substantial degenerate convex surfaces, how does one use ShadowCalculation, PixelCounting method?

asked 2020-07-28 17:02:33 -0500

CullerWhale gravatar image

updated 2020-07-29 08:35:17 -0500

I am having a terrible time trying to address degenerate convex surfaces in my EnergyPlus model.

I was able to isolate and delete some surfaces but Surface 75 (attached) is significant.

image description image description

I have been told by support that I can use something called ShadowCalculation, the PixelCounting method. However, I cannot find any resources online.

Do you know how to use ShadowCalculation's PixelCounting method? Or do you know of a way that I can prevent degenerate convex surfaces from happening to begin with?

Thank you, Cullen

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answered 2020-07-28 20:24:23 -0500

PixelCounting is a new shadow calculation algorithm as of EnergyPlus v9.3.0. You can find documentation on this feature in the I/O Reference and the Engineering Reference.

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Thank you, this is insightful but I do not know how to implement it still. Do I incorporate this by adding "ShadowCalculation, PixelCounting, Periodic, 1;" anywhere into the IDF file?

Also, is there a way to avoid degenerate surfaces when I model?

CullerWhale gravatar imageCullerWhale ( 2020-07-29 11:45:04 -0500 )edit

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Asked: 2020-07-28 17:02:33 -0500

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Last updated: Jul 28