[Equest-users] make exterior wall an interior wall

[Bruce Easterbrook]

One small addition to the copy geometry picture, if go to the location 
drop down on the new wall and select "V1 of the space polygon" eQuest 
will populate all the other lower boxes for you.
Great job Nick, much clearer than my explanation with text.
Bruce Easterbrook P.Eng.
Abode Engineering

On 22/06/2010 11:01 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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