[Bldg-sim] Modeling partly exposed roof in each floor with eQUEST

[Brian Fountain]

You hit on one of eQUEST's weaknesses.  When you model one shell on 
another, eQUEST does not determine the exposed roof area.  You either 
put a roof on the entire lower shell or on none of the lower shell.  I 
tend to put no roof (adiabatic as you suggested) on the lower shells 
then in the detailed edit I add equivalent area roofs on the lower zones 
with exposed roof areas.  I don't tend to create the roof polygons 
(unless the 3D image is really important to the client), I just add 
square roofs of equivalent area to the lower zones or plenums. 

Hope this helps. (Can't wait until this one is resolved. -- I discovered 
it when I built a building with 4 stacked shells and ended up with 
triple the expected roof area -- hard to explain in a design meeting!)

Brian



ulbach, John wrote:
> I BELIEVE, Sir, that eQuest will treat any exposed roof will be roof 
> and any adiabatic floor to floor will be floor.
>  
> Where you can get goofed up is a plenum that covers the entire floor. 
> Try to keep each space with its own plenum, or can the plenums all 
> together.
>
> ------------------------------------------------------------------------
> *From:* bldg-sim-bounces at lists.onebuilding.org 
> [mailto:bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Zhen Tian
> *Sent:* Tuesday, March 11, 2008 4:05 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] Modeling partly exposed roof in each floor with 
> eQUEST
>
> Hello, all,
>
> I have a question regarding modeling roof in eQUEST. In the high-rise 
> building that I am going to model, each floor will have partly exposed 
> floor (the bottom floor has the largest footprint and gradually 
> reduced foot print in the upper floors) and shape is complicated.
>
> Does someone has some experience to model the roof? Since each floor 
> has partly exposed roof, when I model the roof as adiabatic, then the 
> exposed roof will be missing. If I model the whole floor with roof, 
> then lots of roof will be redundant. If I delete these redundant roof, 
> then some zones will be exposed to the exterior without roof while 
> there should be some roof area.
>
> I found it is difficult to create roof shape with plolygon in eQUEST. 
> Is the separation of the parts with and without roof into different 
> shells the best way to model this condition or is there any better 
> methods?
>
> Thanks a lot for your help.
>
> Regards,
>
> David
>
>
>
>
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