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[EnergyPlus_Support] Re: Complicate Zone Geometry modeling

Kostas,

My two cents' worth...

Your approach sounds reasonable.  You can effectively convert the 6 zones into 1 if you increase the interzonal airflow to some high value like 100 ach.  That way, they will all be at about the same temperature.  If the larger cube has exterior glazing, you'll have to consider the distribution of solar radiation on interior surfaces.  Like you said, the best way is probably to use windows to model voids.  I'd use the simple glazing system since you don't want to explicitly define the optical properties of the windows anyway.  Note that even if the U-value of the glazing is high, you'll still have resistance from the boundary between the surface and air, so you'll need airflow to equalize air node temperatures among the 6 zones.

My gut tells me that the image in the link below will be the most accurate geometry using your proposed approach.  It will minimize the effects of shading from the "imaginary walls/windows".

http://fleischfilm.com/wp-content/uploads/2008/04/2-wireframehypercubeprojectededit1.jpg

Liam O'Brien



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "kostas" <ordoumpozanis@...> wrote:
>
> 
> Hi I have a complex geometry that I want to model. The geometry is a small cube inside a bigger zone with no connection between them (like the small cube floats inside the zone). In reality is a glass cube that is held on metal beams 2m above the floor.
> 
> I think one way is to divide the big zone to 6 smaller zones that enclose the small cube, but in this case the surfaces that will connect the small zones will have to be voids.  In this case the only way to simulate the voids (as I know) is with windows that have low resistance. Is there any better way 
> 
> Can anyone tell me any other way that I could model the big cube (I would prefer as one big zones due to model complexity)    
> 
> Thank you in advance
> 
> K. Ordoumpozanis
>




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