[Bldg-sim] Modeling partly exposed roof in each floor with eQUEST
Brian Fountain
bfountain at greensim.com
Tue Mar 11 18:18:14 PDT 2008
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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