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Adjacent floors can't have different constructions

asked 2018-02-28 07:50:07 -0500

Mans_sopers gravatar image

I try to model a building in which 2 rooms have different floors, due to some servers that are installed there in these rooms. Basically these two rooms have a floor that consists of three layers (thin metal layer, marmoleum and floor tiles), while the other rooms only consists of a concrete layer. The following error occurred in OpenStudio:

* Severe * GetSurfaceData: Construction INTERIOR FLOOR INSTALLATION of interzone surface SURFACE 89 does not have the same materials in the reverse order as the construction INTERIOR FLOOR CONCRETE of adjacent surface SURFACE 116

The surfaces are seperated by a wall (the floors are in different rooms). Could someone help me with this?

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answered 2018-02-28 08:29:53 -0500

If surface 89 and surface 116 represent floor surfaces of adjacent spaces then they should not reference each other as outside boundary objects. What is the origin of the geometry and surface matching of the model?

If these two surfaces represented the shared wall or shared floor/ceiling surface between the spaces then the constructions used for each surface need to be mirrors of each other.

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I checked it again and apparently one the ceiling of the basement was not divided into different surfaces. I fixed it and it works now, thanks.

Mans_sopers gravatar imageMans_sopers ( 2018-02-28 12:56:54 -0500 )edit

Glad you figured it out! In a case like that even if you had the constructions correct there would have been EnergyPlus warnings about breaking conservation of energy laws because matched surfaces are not the same size (don't know if it looks for exact same or has a tolerance before it warns you)

David Goldwasser gravatar imageDavid Goldwasser ( 2018-02-28 13:12:10 -0500 )edit

I didn't had any warnings earlier on, so maybe the surfaces were split up but the thermal zone was the same. To fix the problem I only split the two basement parts into two different thermal zones. Thanks for the explanation anyways!

Mans_sopers gravatar imageMans_sopers ( 2018-02-28 13:17:07 -0500 )edit

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Asked: 2018-02-28 07:50:07 -0500

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Last updated: Feb 28 '18