[Equest-users] 1st Time

[Nick Caton]

I think you're just running into the default naming convention for
spaces above your conditioned zones in the wizards.  If you check I
think you'll find they're unconditioned.

 

As long as you specify each airside system as "ducted" or "direct"
return, you should be modeling the intended behavior =).  Dakota Kelley
did a fine job of nailing this topic down recently that I won't try to
outdo, so I've copied his email (and the preceding thread) below for
your perusal - this may not yet be in the archives as it popped up last
week.

 

Additionally, I'll continue to strongly suggesting all new eQuest'ers
bookmark these 2 mailing list archive search pages as a great primary
resource, if you haven't already:

http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/

http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/

 

~Nick

 

 

 

NICK CATON, E.I.T.

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Stephen
Sorensen
Sent: Monday, April 12, 2010 10:59 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] 1st Time

 

Maybe I should have started with an easier model, but for my first real
crack at e-Quest, I am modeling a 3 story religious worship building. My
floor to floor height is 12' and my floor to ceiling height is 10'. All
return air is ducted. But, that unconditioned space shows as plnm even
though I specified that return air is ducted. Will this cause an issue
with my HVAC loads or is this normal?

 

Stephen Sorensen

Hansen Engineering

Friendsville, PA

P: 570-553-4284

F: 570-553-0234

 

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Dakota
Kelley
Sent: Wednesday, April 07, 2010 9:58 AM
To: Katherine Roberts; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Modelling plenums in eQUEST

 

Dr. Kat,

 

You are correct.  I'm not sure how far into the rabbit hole you feel

like going, but let me add a couple additional points:

 

1) What you choose for "System per Area" in the Air-Side Wizard (Screen

1) will determine whether eQUEST creates one plenum per zone or one

plenum per floor.  Selecting "System per Zone" results in one plenum

zone for each occupied zone (in addition to the system being replicated

for each specified zone, of course), and any of the other three options

result in one plenum per floor.  This has implications for modifying

building geometry in the detailed interface in addition to return air

temperatures.  

 

2) The difference between an unconditioned zone a plenum zone, as far as

eQUEST is concerned, is whether or not the zone is a return air path for

its parent system (assuming non-ducted return).  Both are considered

unconditioned space types.  So, for example, you could have a mechanical

room as a zone, specify it as a plenum, and its parent system will

consider that zone's temperature when determining the return air

temperature.  Plenums do not necessarily have to be above-ceiling.

 

3) If you choose ducted return in the wizard, eQUEST will turn your

above-ceiling "plenum" into an unconditioned zone.

 

4) An unconditioned zone cannot have exhaust specified, but exhaust flow

and fan power, as well as a make-up air source, can be specified for a

plenum zone.  

 

 

Thanks,

 

Dakota Kelley

Telios MEP Engineers

Dallas, TX

 

-----Original Message-----

From: Katherine Roberts [mailto:Katherine.Roberts at arup.com] 

Sent: Wednesday, April 07, 2010 8:55 AM

To: equest-users at lists.onebuilding.org

Subject: [Equest-users] Modelling plenums in eQUEST

 

Equesters,

 

I'm new to eQUEST and want to check that I'm understanding it correctly

- am I right in assuming that you do not have to actually build the

plenums into the CAD model but just assign a plenum to a space i.e. by

using the floor to floor heights and floor to ceiling heights?

 

Thanks

 

Kat

 

Dr Katherine Roberts

Engineer

Environmental Physics London

 

13 Fitzroy Street

Arup W1T 4BQ

Tel: +0044 (0)207 755 5454

Internal freecall: 55454

 

www.arup.com

 

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systems are scanned for acceptability of content and viruses

 

 

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