[EnergyPlus_Support] Re: Possible non-planar surface warning

["ooikoonbeng" <ooi_kb3@xxxxxxxxxxx>]

Hi Rose,

EneryPlus computations are based on 1 dimensional heat flows. The slab and basement preprocessors are 3D.

Even if one of the vertex in a 4 vertices rectangle is not on the plane to 10 or more, i cannot remember now, decimal places, the warning will be generated

If you open this idf with Legacy OpenStudio in GoogleSketchup, such nonplanar rectangles will be triangulated, with extra lines and even, at times, with extra zones. If you save this idf and open with EnergyPlus again, you will get even more warnings. 

i stick to creating models with EPlus. Good luck
ooi
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Cody Rose <cmrose@...> wrote:
>
> Hello,
> 
> I have the following surface definition:
>   BuildingSurface:Detailed,
>     14UURUFLf1nxhN1M6Z5xTd,  !- Name
>     Wall,                    !- Surface Type
>     Masonry - Concrete Masonry Units (0.194),  !- Construction Name
>     PRIVATE PARKING GARAGE,  !- Zone Name
>     Surface,                 !- Outside Boundary Condition
>     2Alq_duZP7$O9kLNEDNXyJ,  !- Outside Boundary Condition Object
>     NoSun,                   !- Sun Exposure
>     NoWind,                  !- Wind Exposure
>     Autocalculate,           !- View Factor to Ground
>     Autocalculate,           !- Number of Vertices
>     34.862,-24.919,2.438,  !- X,Y,Z ==> Vertex 1 {m}
>     35.907,-25.965,2.438,  !- X,Y,Z ==> Vertex 2 {m}
>     35.907,-25.964,0,  !- X,Y,Z ==> Vertex 3 {m}
>     34.862,-24.919,0;  !- X,Y,Z ==> Vertex 4 {m}
> 
> Which causes EnergyPlus to emit the following warning:
> ProcessSurfaceVertices: Possible non-planar
> surface:"14UURUFLF1NXHN1M6Z5XTD", Max "out of line"=1.76734E-004 at Vertex
> # 2
> 
> I can see that the surface is (barely) non-planar. Is an error this small
> going to cause actual problems with EnergyPlus, or is that warning just a
> sanity check?
> 
> Thank you,
> Cody Rose
>




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