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<font size="-1"><font face="Arial">Dear Marcus,<br>
<br>
</font></font><font size="-1"><font face="Arial"></font></font><font
size="-1"><font face="Arial">The error you get with automatic heat
transfer calculation is not linked with your orientation
definition and connection with type56, which seems to be fine. <br>
<br>
This is due to an external wall or window in Type56, which have
its convective heat transfer coefficient calculated automaticaly
on its back side.<br>
<br>
To deal with that issue, check all of your wall defintion in
Wall type manager and be sure that </font></font><font
size="-1"><font face="Arial"> convective heat transfer coefficient
of back</font></font><font size="-1"><font face="Arial"> sides
of your exernal wall are not defined as automatic.<br>
</font></font><font size="-1"><font face="Arial"><br>
Best regards<br>
</font></font>
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<font color="#DC143C" face="CALIBRI" size="2"> Je serai absent du
1er au 28 Août 2011
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<td colspan="2"><font color="#000000" face="CALIBRI"
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Simulations Thermiques Dynamiques</font></td>
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Le 21/07/2011 15:01, Marcus.Joppich a écrit :
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<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Hello
David,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">thank
you for your answer. I´ve tried it. The following steps were
performed:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">I
defined 6 orientations of walls to external: Northwest (Wall
to external)/ Southeast (Wall to external)/ Northeast (Wall
to external)/ Northwest with a slope of 37 degrees (sloping
roof)/ Southeast with a slope of 37 degrees (sloping roof)/
Northeast with a slope of 37 degrees (sloping roof).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">At
Type109 I defined 6 surfaces with the following parameters:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Surface1/Slope
of surface 0/Azimuth of surface 225<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Surface2/Slope
of surface 0/Azimuth of surface 135<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Surface3/Slope
of surface 0/Azimuth of surface 315<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Surface4/Slope
of surface 37/Azimuth of surface 225<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Surface5/Slope
of surface 37/Azimuth of surface 135<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Surface6/Slope
of surface 37/Azimuth of surface 315<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Then
I connected the outputs with the inputs by Type56.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Is
it the right way?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:200%"><span
style="color:#1F497D" lang="EN-US">I get a fatal error:
“Error in automatic heat transfer calculation for surface
1 or its adjacent surface!: Automatic heat transfer
calculation is only allowed on surfaces within a zone.
Please check building input file (.bui)”, but I think it has
a different reason.<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:200%"><span
style="color:#1F497D" lang="EN-US">Thank you for your help.<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:200%"><span
style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:200%"><span
style="color:#1F497D" lang="EN-US">Regards, Marcus<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
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1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">Von:</span></b><span
style="font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext"> David
BRADLEY [<a class="moz-txt-link-freetext" href="mailto:d.bradley@tess-inc.com">mailto:d.bradley@tess-inc.com</a>]
<br>
<b>Gesendet:</b> Mittwoch, 20. Juli 2011 19:12<br>
<b>An:</b> Marcus.Joppich<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:trnsys-users@cae.wisc.edu">trnsys-users@cae.wisc.edu</a><br>
<b>Betreff:</b> Re: [TRNSYS-users] sloping surfaces<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Marcus,<br>
It depends somewhat on what component you are using to model
the attic. However, almost without exception, you need to
define the slope and azimuth of the attic roof surfaces in
your weather component (Type15 probably) and then pass the
appropriate solar radiation outputs from that component to the
appropriate inputs of your building component.<br>
Regards,<br>
David<br>
<br>
<br>
On 7/20/2011 06:57, Marcus.Joppich wrote: <o:p></o:p></p>
<p class="MsoNormal">Hello TRNSYS-users,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I try to simulate few
rooms in an attic. I don´t understand how I can describe a
sloping surface (like a sloping roof) with TRNSYS. Maybe you
can help me.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Thanks for your time.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Marcus</span><o:p></o:p></p>
<pre><o:p> </o:p></pre>
<pre><o:p> </o:p></pre>
<pre>_______________________________________________<o:p></o:p></pre>
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<br>
<o:p></o:p></span></p>
<pre>-- <o:p></o:p></pre>
<pre>***************************<o:p></o:p></pre>
<pre>David BRADLEY<o:p></o:p></pre>
<pre>Principal<o:p></o:p></pre>
<pre>Thermal Energy Systems Specialists, LLC<o:p></o:p></pre>
<pre>22 North Carroll Street - suite 370<o:p></o:p></pre>
<pre>Madison, WI 53703 USA<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>P:+1.608.274.2577<o:p></o:p></pre>
<pre>F:+1.608.278.1475<o:p></o:p></pre>
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