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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Adrien,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>To model the airflow in
the skin, you do need a separate zone in TRNBUILD indeed. Preferably a number
of zones, in order to get a vertical gradient in temperature. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>To model natural
convection there a two possibilities that I know of:<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:navy'><span style='mso-list:Ignore'>-<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=navy
face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial;
color:navy'>buy the TRNFLOW- plugin for TRNSYS, and TRNFLOW will calculate the
natural convection for you<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:navy'><span style='mso-list:Ignore'>-<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=navy
face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial;
color:navy'>model the convection yourself, which is quite straightforward:
calculate the temperature in the skin by TRNSYS, calculate the density/pressure
difference in the skin using an equation-type, and calculate the induced flow
by assuming the skin is a very large (rectangular) duct. The calculated flow
can now be used as an input for a ventilation-type in TRNBUILD.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:navy'>regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='border:none;padding:0cm'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Arie<o:p></o:p></span></font></p>
<p class=MsoNormal style='border:none;padding:0cm'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>Van:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <st1:PersonName
w:st="on">trnsys-users-bounces@engr.wisc.edu</st1:PersonName> [mailto:<st1:PersonName
w:st="on">trnsys-users-bounces@engr.wisc.edu</st1:PersonName>] <b><span
style='font-weight:bold'>Namens </span></b>jezequel adrien<br>
<b><span style='font-weight:bold'>Verzonden:</span></b> donderdag 14 december
2006 16:23<br>
<b><span style='font-weight:bold'>Aan:</span></b> trnsys-users@engr.wisc.edu<br>
<b><span style='font-weight:bold'>Onderwerp:</span></b> [TRNSYS-users] Modeling
a double skin facade</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi users, <br>
<br>
I am a recent TRNSYS user, and I need some help to model a double skin facade. <br>
<br>
An old concrete building is partially covered by a glass "skin". The
distance between the skin and the old facade is around <st1:metricconverter
ProductID="1.5 m" w:st="on">1.5 m</st1:metricconverter>. I have describe the
building with TRNBUILD, but I don't know how I can do to model the air zone
between the glass skin and the concrete face. The skin begins at the first
floor (and is opened to air). It stops <st1:metricconverter ProductID="1.2 m"
w:st="on">1.2 m</st1:metricconverter> above the last level. The skin doesn't
recover totally the building (The last floor is boundary to external).<br>
<br>
I have tried to put the air zone in a particular zone in TRNBUILD, but I'd like
to take into acount natural convection in the gap, to model air flow in the
skin.<br>
<br>
Thanks for jour help.<br>
<br>
Adrien<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Découvrez une nouvelle façon d'obtenir des réponses à toutes vos
questions ! Profitez des connaissances, des opinions et des expériences des
internautes sur <a
href="http://fr.rd.yahoo.com/evt=42054/*http:/fr.answers.yahoo.com">Yahoo!
Questions/Réponses</a>.<o:p></o:p></span></font></p>
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