Re: [EnergyPlus_Support] Help on a detached shading issue!

[Linda Lawrie <linda@xxxxxxxxxx>]

If you want them not to influence the heat 
transfer solution, you must enter the blocks as 
detached shading not as HeatTransfer surfaces (== 
not sure if your interface of "adiabatic" is doing this for you or not).

The warning just tells you what outside 
conditions will end up being used for these surfaces.

I will try to look at your uploaded file.

Linda

At 09:41 AM 6/9/2008, Nuno Costa Brandão wrote:

>Dear All,
>
>I´m simulating a multi-story building from which I choose one floor to
>model. Around the building there are other buildings which block solar
>radiation so I choose to model them as single zone blocks, defining
>all of its surfaces as adiabatic so they do not enter in heat transfer
>calculations. However, as they were drawn after the floor model, they
>have negative coordinates which results in an error issue, and also
>little influence in the final results(PURCHASED AIR HEATING AND
>COOLING RATES):
>
>ERROR MESSAGE:
>    ** Warning ** CalcSurfaceCentroid: 209 Surfaces have the Z
>coordinate < 0.
>    **   ~~~   ** ...in any calculations, Wind Speed will be 0.0 for
>these surfaces.
>    **   ~~~   ** ...in any calculations, Outside temperatures will be
>the outside temperature + 9.750E-003 for these surfaces.
>    **   ~~~   ** ...that is, these surfaces will have conditions as
>though at ground level.
>
>I must guarantee the sun blockage correctly, is this procedure
>appropriated?
>I´m uploading the file so that you can have a look at it.
>
>Thanks for the help
>Nuno


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