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<font size="-1"><font face="Arial">Dear Devin, <br>
<br>
Your active layer have to be placed between two layers. As
written in the manual, "the thickness of both layers adjacent to
active layer must be >= 0.3 * pipe spacing".<br>
<br>
Regarding the convective coefficient, you will have to select
"internal calculation" in "Convective Heat Transfer coefficient
of wall" in Type56 wall type manager. </font></font>This
option is available for all type of wall, except from back side of
external walls. <br>
<font size="-1"><font face="Arial"><br>
</font></font><font size="-1"><font face="Arial">You may also have
a look to the manual for more informations : </font></font><font
size="-1"><font face="Arial">"TRNSYS </font></font><font
size="-1"><font face="Arial">16 Multizone Building Modelling with
Type 56 and TRNBUILD" p 6-44.</font></font> <br>
<font size="-1"><font face="Arial"><br>
Best regards<br>
</font></font>
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<td colspan="2"><font size="2" color="#000000"
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Simulations Thermiques Dynamiques</font></td>
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<br>
Le 03/04/2011 18:06, Devin Rohan a écrit :
<blockquote
cite="mid:AANLkTikU+JVn-B+MrY8iSOD5ya2Z42E+1JhYFqS=u=y2@mail.gmail.com"
type="cite">I'm using TRNSYS version 16 to model a radiant floor
heating system for a single office zone/room. I have 2 questions.
<div><br>
</div>
<div>1) When I try and create a new active layer in Type 56
(multi-zone building), I get the following warning/error
message...
<div>
<br>
<div><b>"active layer could not place on first position."</b> What
does this mean and how can it be fixed? </div>
<div><br>
</div>
<div>2) Is there a better way to model a single zone than Type
56's GUI. I also want to have the convective heat transfer
coefficients calculated internally for every time step
(since they depend on the varying surface temperatures), but
Type 56 only allows this if the wall is classified as
"Internal" and not "External". How can I account for the
varying convective heat transfer coefficients? </div>
<div><br>
</div>
<div>Thank you</div>
<div><br>
-- <br>
Devin M. Rohan, LEED Green Associate<br>
Purdue University <br>
Civil/Architectural Engineering<br>
<a moz-do-not-send="true" href="mailto:drohan@purdue.edu"
target="_blank">drohan@purdue.edu</a><br>
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