[Equest-users] make exterior wall an interior wall

Peter Hillermann e190984026 at exchange.1and1.com
Tue Jun 22 08:39:23 PDT 2010


Absolutely... I think it would help all users.

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Jason
Glazer
Sent: Tuesday, June 22, 2010 11:08 AM
To: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] make exterior wall an interior wall

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
>
> This email and any files transmitted with it are confidential and 
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--
Jason Glazer, P.E., GARD Analytics, 90.1 ECB chair Admin for onebuilding.org
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