[Equest-users] Zoning Issue

[Nick Caton]

In full support of Brian's response, I'd add one extra tidbit:  

 

Post-wizards, I would generally take the "delete the wall" approach 9
times out of 10 without a second thought.  In the event you do feel the
mass of the common wall has a significant thermal lag effect you don't
want to eliminate in your model, I'd advise still just deleting the wall
and bumping up the value for the furniture mass (located under the
contents tab for the space in question).

 

Creating an interior wall to match a wizard-generated exterior (which
I've written a mini guide on, btw - see archives) is something I'd
generally only advocate if model aesthetics are critical (the 3D view).
Deleting the wall surface entirely is a quick solution, but has the side
effect of giving you superman-like xray vision powers when in the 3D
view... this has raised eyebrows in my experience and I have had to
explain the modeled behavior is not what it looks like.

 

Personally, I reserve and maintain the right to make ugly models
whenever it saves me time and doesn't hinder accuracy, but to each
his/her own ;).

 

~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 Brian
Fountain
Sent: Wednesday, November 10, 2010 9:44 AM
To: RJTHEACMAN at aol.com; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Zoning Issue

 

You will have to define the common wall as an "adiabatic" interior
partition -- no heat transfer and no solar load.  In the wizard you can
do this by clicking on the wall (in Shell screen 2 of the DD wizard) and
then selecting adiabatic.  In detailed mode you can also delete a
exterior wall and then create an interior partition of type adiabatic.
You could also simply delete the common wall -- this also has no solar
and no conduction load.  The only thing this does is decreases the
room's thermal mass slightly (not of significance likely).  

There is no way to create and interior partition and to force the
temperature of the adjacent space -- you would have to create the "next
to" zone if you really want to model heat transfer between new and
existing.  Unless the occupancies are significantly different, the
impact of conduction across that wall is likely negligible.

Good luck.

BF

On 11/10/2010 10:36 AM, RJTHEACMAN at aol.com wrote: 

I am modeling an addition to an existing building. The new addition has
three perimeter exposures and the fourth exposure is up against the
existing building, which is a conditioned space.

How do I tell equest that one of my exposures is not a perimeter wall
but it is basically a partition with a conditioned space adjacent to it?

Thanks

Richard J. Dominick, P.E.
TEC Engineers LLC.
The Energy Consultant
304 Main Avenue, Suite 426
Norwalk, CT. 06851
Phone: 203-722-5206
Fax: 203-849-0781

 
 
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