[Equest-users] Modeled Interior Floors as Exterior Roofs

[Malik Taha via Equest-users]

Hi ,

I`m still learning e-quest
if you finish this project could you send as case study......I`m looking
for case study from A to Z could send to me as a link on drive

thanks in advanced

On Wed, Jul 13, 2016 at 5:17 PM, Haberl, Jeff via Equest-users <
equest-users at lists.onebuilding.org> wrote:

> Hello Darryl:
>
>
>
> It may be worse than you think.
>
>
>
> From the looks of the image it also appears that you have plenums in the
> building, which further complicates the simulation, and for reasons that
> are not always obvious. For example, in DOE-2 if you declare the return air
> path as having a plenum and then assign the walls, roof, floor, etc. to
> that plenum as the zone, then the heat gain/loss from that surface is
> assigned to the air that is returning from the zone on its way back to the
> HVAC system and therefore, it will not show up in the peak load in LOADS
> because it is a heat gain to the return air and not the zone. You can prove
> this to yourself using the SAMP1 file that comes with DOE-2.
>
>
>
> For example, in the SAMP1.INP file that comes with DOE-2, RUN 3A, there is
> a single story 5 zone model with a plenum. What you will notice when you
> run this model is there is no roof load in LOADS because the single story
> building has a plenum and the roof load has been assigned to the plenum as
> the zone. The load from the roof does show up when you assign a SYSTEM
> where it then appears as heat gain/loss from the return air.
>
>
>
> To “see” the load from the roof you have to remove the plenum and
> re-proportion the roof to the zone area. Then the roof shows up in the
> component loads in the LOADS peak load report.
>
>
>
> I suspect that deep inside the bowels of the model you showed below this
> is going on.
>
>
>
> Jeff
>
>
>
> 8=!  8=)  :=)  8=)  ;=)  8=)  8=(  8=)  8=()  8=)  8=|  8=)  :=')  8=) 8=?
> Jeff S. Haberl, Ph.D.,P.E.inactive,FASHRAE,FIBPSA,......jhaberl at tamu.edu
> <........jhaberl at tamu.edu>
> Professor........................................................................Office
> Ph: 979-845-6507
> Department of Architecture............................................Lab
> Ph:979-845-6065
> Energy Systems Laboratory...........................................FAX:
> 979-862-2457
> Texas A&M
> University...................................................77843-3581
> College Station, Texas, USA, 77843..............................URL:
> www.esl.tamu.edu
> 8=/  8=)  :=)  8=)  ;=)  8=)  8=()  8=)  :=)  8=)  8=!  8=)  8=? 8=) 8=0
>
>
>
>
>
> *From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org
> <equest-users-bounces at lists.onebuilding.org>] *On Behalf Of *Darryl Kasun
> via Equest-users
> *Sent:* Wednesday, July 13, 2016 2:42 PM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Modeled Interior Floors as Exterior Roofs
>
>
>
> Hey everyone,
>
>
>
> The hospital I am working has different footprints for each level (see
> snapshot below).  While going thru the bldg. envelope in detailed mode, I
> noticed that the surfaces separating interior floors are modeled as
> exterior roofs.  Now it’s been a while since I’ve modeled using eQUEST but
> I’m sure these surfaces should be modeled as interior floors.
>
>
>
>
>
>
>
> So a couple questions:
>
>
>
> 1)      What did I miss in the DD Wizard?  One shell was made for each
> elevation, and for the each above grade floor, below is the input entered
> for the floor info.  Is this where I made my mistake?  Or do I need to
> model the shells with and without roofs separately?
>
>
>
>
>
> 2)      Is there a fast way to change what’s needed without deleting each
> “interior roof” and replacing it with an interior floor or going back into
> the DD wizard?  Pretty sure not but here’s hoping!
>
>
>
> Thanks everyone.  Hope your mid-week is going well!!
>
>
>
> Darryl Kasun
>
>
>
>
>
>
>
> _______________________________________________
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