[Equest-users] make exterior wall an interior wall

[Jason Glazer]

I have considered adding a Wiki to the onebuilding.org web 
site to allow material related to specific simulation 
programs (such as a Frequently Asked Questions for 
eQUEST-users) to be posted. The visual guide that you put 
together would probably be a good addition. Would a Wiki be 
useful?

Jason

On 6/22/2010 10:01 AM, Nick Caton wrote:
> Alright folks…
>
> This is one of a number of things I really wish someone walked me
> through when I was new to this – so pay attention if you’re learning =)!
>
> Attached images are a “visual guide” walking you through changing an
> external surface into an adiabatic internal surface in detailed mode. It
> took me 10 minutes to pull these together, but 99% of that was spent
> creating/naming the images. The process is simple.
>
> Also, If _anyone_ can answer this: Is there any plan or consideration to
> have images and other attachments like this included in the mailing list
> archives for future reference? I think it’s a bummer that so many miss
> out on really important email attachments (excel tools, example files,
> studies, and other time savers). If it were possible, I and others might
> be more inclined to generate this sort of “mini-guide” visual response
> knowing others could find and reference such information in the future.
>
> ~Nick
>
> cid:489575314 at 22072009-0ABB**
>
> * *
>
> *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 *Nick
> Caton
> *Sent:* Tuesday, June 22, 2010 9:07 AM
> *To:* Sami, Vikram; Reba Schaber; equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] make exterior wall an interior wall
>
> As further clarification,
>
> If you delete any wall/ceiling/roof, you (1) remove both a source of
> heat storage (thermal mass) while also (2) removing any heat transfer
> across that surface. As a caution: Losing the first effect can be a lot
> more significant that you might assume, depending on what you’re looking
> into.
>
> If you instead change any interior surface type to “adiabatic” (in the
> same wizard/detailed places you might select “air” or “internal”), you
> will remove heat transfer while retaining the thermal mass of the
> construction. This may be the best route when trying to study a
> perimeter classroom in isolation, for example.
>
> Quirky thing is, you can’t change an exterior surface type
> (roof/floor/wall) to adiabatic, so as Vikram is saying you have to first
> create an interior surface, copying across the geometrical properties
> (polygon, vertices, azimuth…), then delete the exterior surface. Make
> sure to define and assign an interior surface construction (layers) if
> the Wizards haven’t already set this up for you.
>
> ~Nick
>
> cid:489575314 at 22072009-0ABB**
>
> * *
>
> *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_ _
>
> -----Original Message-----
> From: equest-users-bounces at lists.onebuilding.org
> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Sami,
> Vikram
> Sent: Monday, June 21, 2010 9:20 PM
> To: Reba Schaber; equest-users at lists.onebuilding.org
> Subject: Re: [Equest-users] make exterior wall an interior wall
>
> Reba,
>
> If you've gone through the wizard your interior and exterior walls
> should be in tehir correct places.
>
> Interioir walls should separate two spaces, and will define heat
> transfer between those two spaces. You normally have to define which
> space is on the other side.
>
> Exterior walls define heat transfer between the space and the outside.
>
> If you are in detailed mode, you can delete one and create the other as
> a child component to the space. When you say large air space - is that
> the air cavity in the wall? I'm not sure what resistance eQUEST
> attributes to the larger air gaps, but in reality air cavities over a
> certain size (I think 1 inch is probably the upper threshold) increase
> their convective heat transfer and the cavity resistance should go down
> (not up).
>
> If your just looking to make it adiabatic, I think you should be fine
> with just deleting the wall. You will lose the thermal mass of the wall
> material though.
>
> I would model it as an interior wall - especially if there is a space on
> the other side.
>
> ________________________________
>
> From: equest-users-bounces at lists.onebuilding.org
> [equest-users-bounces at lists.onebuilding.org] On Behalf Of Reba Schaber
> [Rschaber at PHMECH.COM]
>
> Sent: Monday, June 21, 2010 9:43 PM
>
> To: equest-users at lists.onebuilding.org
>
> Subject: [Equest-users] make exterior wall an interior wall
>
> I’m running a simulation on just a portion of a building. eQuest sees
> all walls of the polygon as exterior walls. In reality some walls are
> interior and will not have heat transfer. Is there any way to make
> eQuest see those walls as interior walls? I’ve thought of defining those
> walls with super insulation and a large air space so heat transfer is
> negligible. Anyone tried that?
>
> Reba Schaber Mechanical Engineer, P.E.
>
> LEED Accredited Professional
>
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-- 
Jason Glazer, P.E., GARD Analytics, 90.1 ECB chair
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