[Equest-users] External Adiabatic

Lyle Keck lkeck at aeieng.com
Thu Apr 28 16:27:08 PDT 2011


I know of a work-around to make an exterior surface (wall/flr/roof) into an adiabatic surface if you already have an adiabatic surface somewhere in your model.

These instructions are for detailed mode and I will try to explain them as clearly as I can.

So let’s say you have an existing adiabatic/interior surface in your model, we will call this surface INTERIOR-1 for reference.
Let’s name the current exterior surface that you would like to make adiabatic/interior surface EXTERIOR-1 for reference.

First start by selecting surface EXTERIOR-1 in the project tree under ‘building shell’. Right click this surface and select properties. On scrap paper, copy the parent space as well as all of the information under location & geometry (loc/poly/x/y/z/Azimuth/area/height/width/tilt/ etc..). This will allow you to recreate the surface you wish to change in exactly the same shape and location. Exit out of EXTERIOR-1 properties.

Next, click on the existing adiabatic/interior surface named INTERIOR-1 and select ‘create another interior wall’.  Name the new interior wall name something close to the name for exterior-1 or the surface you wish to replace. Select the parent space that you copied down for EXTERIOR-1. For create option, select copy an existing component and select INTERIOR-1 from the dropdown. Click ok.  A new interior surface properties box should come up and you should see ‘adiabatic’ selected under surface type.  In this new box, copy all of the location and geometry information that you took down for EXTERIOR-1. Sometimes the correct info will already be there and sometimes you will have to input the values you copied down (depending on if it’s a space polygon or not?). Click OK.

TADAA! You should now have an adiabatic interior surface in exactly the same place as the exterior surface you were trying to change.  Once you are sure the surface is correct, delete the original EXTERIOR-1 as you will have two identical surfaces on top of each other.

I hope this helps, I have used this method to make adiabatic interior surfaces for models with multiple shells as well as models that are adjacent to existing buildings.


Lyle Keck
SustainablE Systems Analyst



AEI | AFFILIATED ENGINEERS, INC.
Westlake Center Office Tower, 1601 Fifth Avenue, Suite 1400 | Seattle, WA  98101

P: 206.256.0800 | F: 206.256.0423
lkeck at aeieng.com<mailto:lkeck at aeieng.com>  |  www.aeieng.com<http://www.aeieng.com/>






From: Mark Darrall [mailto:MDarrall at a2so4.com]
Sent: Wednesday, April 27, 2011 1:56 PM
To: Deepika; Arpan Bakshi
Cc: equest-users
Subject: Re: [Equest-users] External Adiabatic

I like that. It’s elegant. eQ still wanted Constructions and Layers, so I set the overall U to 0.001 and used an interior wall construction.

Thanks!

MARK DARRALL, AIA, LEED AP BD+C, NCARB
Senior Project Manager

[cid:image001.jpg at 01CC05BE.FE69E660]

DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN

A2SO4 Architecture, LLC
Union Station
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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Deepika
Sent: Wednesday, April 27, 2011 10:13 AM
To: Arpan Bakshi
Cc: equest-users
Subject: Re: [Equest-users] External Adiabatic

I think the u value can be changed to 0.001 to male the wall with almost zero heat transfer when in detailed mode. I tried doing that n it worked.

On Apr 27, 2011, at 7:06 AM, Arpan Bakshi <arpanbakshi at gmail.com<mailto:arpanbakshi at gmail.com>> wrote:
Yes, the problem here is I am deep into detailed mode. Looks like we have to crack open the text edit again.

Thanks
Arpan

On Apr 27, 2011, at 9:55 AM, "Chris Swanson" <cswanson at rdfa.com<mailto:cswanson at rdfa.com>> wrote:

See below.  Nick gives a good explanation when I posed the same question a couple weeks ago.



Chris Swanson, EI

Mechanical Design Engineer

Roger D. Fields & Associates

(614) 451-2248



-------------------------------------------------------------------------------------------------------------------
“A suggestion for you both:

Right click any side of a shell during DD wizards at the zone definition screen (after any custom footprint/zoning patterns) to make that wall section “entirely adiabatic.”  This sidesteps making any extra shells/systems and avoids having to back any figures out later.  Screengrab following illustrates where I’m talking about – results in the background.

You can accomplish the same net effect in detailed mode in various ways, but I think this is probably the easiest/fastest approach if you know from the start you want to model only part of a building with exterior exposures.

<image001.png>

Best of luck!

~Nick

<image002.jpg>

NICK CATON, E.I.T.
PROJECT ENGINEER
Smith & Boucher Engineers
25501 west valley parkway
olathe ks 66061
direct 913 344.0036
fax 913 345.0617
www.smithboucher.com

From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bruce Easterbrook
Sent: Wednesday, April 06, 2011 9:58 AM
To: Chris Swanson
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] How to model part of a building?

You have the right idea.  Depending on the building of course, but I try to lump the part you aren't concerned about onto one AHU, and default everything in that portion.  You are only concerned about the intersecting wall and it's condition.  Add your other AHU's and zoning for the portion you want to work on.  With the one extra AHU is makes it relatively easy to back out its numbers from the building analysis and you are left with what you want.
Bruce Easterbrook P.Eng.
Abode Engineering

On 06/04/2011 10:15 AM, Chris Swanson wrote:
Hello all,

I’m looking for recommendations of how to model just one section of a building in eQUEST.  Three sides are exterior walls, while the fourth is connected to the rest of the building, and therefore next to a conditioned space.  Would the best method be to just use two separate shells (1 – the building “wing” I’m analyzing, 2 – the rest of the building), although I’m only concerned with one of them?  Is there a better way to do this?  I’m hoping someone can point me in the right direction.

Thanks,

Chris Swanson, EI
Mechanical Design Engineer
Roger D. Fields & Associates
Columbus, Ohio 43220-2777
E-mail: cswanson at rdfa.com<mailto:cswanson at rdfa.com>”






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-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Arpan Bakshi
Sent: Wednesday, April 27, 2011 9:48 AM
To: equest-users
Subject: [Equest-users] External Adiabatic



I can't find this thread I remember seeing about turning an exterior surface adiabatic where new construction meets existing building, ideas?









Arpan Bakshi, LEED AP BD+C

YRG sustainability

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