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Martin,<br>
I would add to Ewen's response with a clarification that what you
have to add in Trnsys3D is a series of shading objects sticking out
like fins perpendicular to the perimeter of the window. Do not try
and draw the actual thickness of the wall in Trnsys3D; the T3D model
is a wire frame model.<br>
<br>
A few other words of caution here as well. First, 50cm thick walls
have so much mass in them that they can give TRNBuild a lot of
trouble when it tries to come up with a representative transfer
function. I would try and specify those walls very early in the
process so that you do not waste a lot of time constructing a model
that will not work later on. Second, before you draw a whole lot of
shading objects, consider the use of Type34 instead. If all the
windows are the same size and face the same direction, the shading
effect of the thick wall can be computed using a single Type34 and
then passing the shaded radiation to Type56 as the solar radiation
falling on each of the windows. Note that you will have to assign a
different ORIENTATION to the windows in TRNBuild.<br>
Kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 5/23/2013 10:11, Ewen wrote:<br>
</div>
<blockquote
cite="mid:0BC57C5E-B3E2-4C1B-899E-B41F3C26772C@gmail.com"
type="cite">
<div>Hy Martin,</div>
<div>I would say that you are right. You need to draw the
thickness of the walls on T3D by adding shading surfaces around
the window. </div>
<div><br>
Best,<br>
Ewen Raballand</div>
<div><br>
Le 23 mai 2013 à 15:40, "Martin Schmelas" <<a
moz-do-not-send="true"
href="mailto:Martin.Schmelas@hs-offenburg.de">Martin.Schmelas@hs-offenburg.de</a>>
a écrit :<br>
<br>
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<p class="MsoNormal"><span lang="EN-US">Dear TRNSYS users,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a question
about shadings, walls and windows.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I built up a 3D
model in TRNSYS3D. For the surface dimensions I used for
every wall the centerline. The exterior walls have a lot
of windows. I know the thickness of the walls can be
defined in TRNBUILD.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">For example the
exterior wall has a thickness of 50 cm and the windows
are located at the inside dimension, how is the shading
from the wall considered? <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Do I have to
implement in TRNSYS3D shading groups with the dimension
of 50 cm around the windows?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Martin<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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