[Equest-users] Maximum spaces/zones in v 3.63?

[Pasha Korber-Gonzalez]

Okay--I would agree that a building the size of an entire city block is an
extenuating circumstance.  I wish you luck & sanity on managing this
project.

Keep us posted on how this model works for you, and yes I would assume (like
you) that the zone quantities for V3.37 still do apply for V3.63

Pasha

p.s. I do not envy you for this project--but what a fun challenge
none-the-less.  ;)

On Tue, Mar 23, 2010 at 12:58 PM, James Hansen <JHANSEN at ghtltd.com> wrote:

>  Thanks Pasha – I forgot to mention that the building I am modeling takes
> up an entire city block in DC.  Hence the large number of zones.  I’ve
> definitely cut it down to as few zones as I can without potentially
> sacrificing results.
>
>
>
> For reference, this was what Jeff Hirsch sent around about v3.37.  I’m
> assuming it’s the same for v3.63, and it looks like you can now model 4000
> spaces and 4000 zones (hopefully).
>
>
>
> I was just wondering if anyone had evidence that this is the case:
>
>
>
> For AutoCAD import and trace around (or just manually created floor plans,
>
> spaces, or surfaces) the maximum number of vertices in 120.  This version
>
> also allows up to 4000 spaces and 8000 each for exterior walls, windows and
>
> 2000 air-side HVAC systems.  A 1440 space run (with 792 exterior walls and
> 372
>
> windows, 672 ground coupled surfaces, 4080 interior walls, 648 building
> shades, 720 air-side
>
> AHU's) runs through BDL in 90 seconds and completes a year simulation,
> including
>
> detail output reports, in just under 51 minutes on a Dell PWS450 (2.66GHz
> IX
>
> processor and 1GB RAM) running Windows XP-Pro.  This model (a 14 building
> campus)
>
> was created with the new muti-shell, muti-HVAC Design Development wizard in
>
>
> less than an hour; of course the use of custom footprints and adjustments
> to space and
>
> HVAC details (needed to represent a final design) will add substantial
> information collection
>
> and eQUEST input time.
>
>
>
> *GHT Limited
> **James Hansen**, PE, LEED AP*
>
> *Senior Associate***
>
> 1010 N. Glebe Rd, Suite 200
>
> Arlington, VA  22201-4749
>
> 703-338-5754 (Cell)
>
> 703-243-1200 (Office)
>
> 703-276-1376 (Fax)
>
> www.ghtltd.com
>
> * *
>
>
>
> *From:* Pasha Korber-Gonzalez [mailto:pasha.pkconsulting at gmail.com]
> *Sent:* Tuesday, March 23, 2010 2:35 PM
> *To:* James Hansen
> *Cc:* equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Maximum spaces/zones in v 3.63?
>
>
>
> Hi James,
>
>
>
> I can't confirm for you your question about allowable zones, but I did want
> to offer a couple of cents from my perspective...I hope that you are not
> planning to zone each space for each floor.  This is what I call a
> simulation nightmare--primarily for you as the simulator, but also for
> anyone who is or will be reviewing your model.
>
>
>
> The zones are specifically thermal zones, so where you have alike thermal
> characteristics you can zone these spaces together as one zone.  Be mindful
> of zoning like spaces, but different perimeter exposures--for example you
> should not create a thermal zone that has both an east & south perimeter
> exposure because of the envelope loads that are experienced by these
> differing exposures.
>
>
>
> Always try to simplify your models to work with as few zones as
> possible--from an input & file management standpoint.  Remember the more
> inputs you have, the more you open the door for variable errors in your
> file.  Sometimes the fewest possible zones might be in the 100's, or in the
> 10's range, but I personally would question any model that used more than
> 1000 zones for anything unless there were extenuating circumstances.
>
>
>
> If you'd like some extra assistance or suggestions for your thermal zoning
> approach & input into eQuest, please contact me and send me some pdf's of
> your floor plans and I would be happy to help you.
>
>
>
> Pasha
>
> On Tue, Mar 23, 2010 at 11:44 AM, James Hansen <JHANSEN at ghtltd.com> wrote:
>
> For those also subscribed to the bldg-sim list, you may have just seem Eric
> Sturm’s email with an updated spreadsheet comparing DOE2, eQuest, Trace and
> HAP.
>
>
>
> I don’t think it’s up-to-date for eQuest, but something on the list scared
> me.  eQuest isn’t still limited to 1024 zones is it?
>
>
>
> I’m working on a 19 story building with 100+ spaces per floor, and I’m
> hoping this isn’t still the case.  I thought I remember seeing that since
> version 3.37, you’re allowed to have something like 4000 spaces.
>
>
>
> Can anyone confirm?  Would really suck to get ¾ of the way thru my model
> and realize I have to cut back on zoning.
>
>
>
> Thanks!
>
>
>
> *GHT Limited
> James Hansen, PE, LEED AP*
>
> *Senior Associate*
>
> 1010 N. Glebe Rd, Suite 200
>
> Arlington, VA  22201-4749
>
> 703-338-5754 (Cell)
>
> 703-243-1200 (Office)
>
> 703-276-1376 (Fax)
>
> www.ghtltd.com
>
> * *
>
>
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