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<p class=MsoNormal>As further clarification,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>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.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>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.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>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.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>~Nick<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>-----Original Message-----<br>
From: equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] On Behalf Of Sami, Vikram<br>
Sent: Monday, June 21, 2010 9:20 PM<br>
To: Reba Schaber; equest-users@lists.onebuilding.org<br>
Subject: Re: [Equest-users] make exterior wall an interior wall<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Reba,<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>If you've gone through the wizard your interior and
exterior walls should be in tehir correct places.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>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.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Exterior walls define heat transfer between the space and
the outside.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>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).<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>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.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>I would model it as an interior wall - especially if there
is a space on the other side.<o:p></o:p></p>
<p class=MsoPlainText>________________________________<o:p></o:p></p>
<p class=MsoPlainText>From: equest-users-bounces@lists.onebuilding.org
[equest-users-bounces@lists.onebuilding.org] On Behalf Of Reba Schaber
[Rschaber@PHMECH.COM]<o:p></o:p></p>
<p class=MsoPlainText>Sent: Monday, June 21, 2010 9:43 PM<o:p></o:p></p>
<p class=MsoPlainText>To: equest-users@lists.onebuilding.org<o:p></o:p></p>
<p class=MsoPlainText>Subject: [Equest-users] make exterior wall an interior
wall<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>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?<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText> Reba
Schaber Mechanical Engineer, P.E.<o:p></o:p></p>
<p class=MsoPlainText>
LEED Accredited Professional<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>This email and any files transmitted with it are
confidential and intended solely for the addressee. If you are not the named
addressee you should not disseminate, distribute, copy, or alter this email.<o:p></o:p></p>
<p class=MsoPlainText>_______________________________________________<o:p></o:p></p>
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