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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'>Hello Julie,<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 style='font-size:
10.0pt;font-family:Arial;color:navy'>Some answers:<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>
<ol style='margin-top:0cm' start=1 type=1>
<li class=MsoNormal style='color:navy;mso-list:l0 level1 lfo1'><font size=2
color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>If there is thermal mass, it is important (heat accumulation). In
your case, with isolation at the outside, you will have thermal mass. If
you add a wall to a zone, the inside of the wall is in your zone, the
outside not.<o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<ol style='margin-top:0cm' start=2 type=1>
<li class=MsoNormal style='color:navy;mso-list:l0 level1 lfo1'><font size=2
color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>In your wall definition screen, there you can add the solar
absorbance (characteristic of the material)<o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<ol style='margin-top:0cm' start=3 type=1>
<li class=MsoNormal style='color:navy;mso-list:l0 level1 lfo1'><font size=2
color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>If goesurf is set to zero, the incoming solar radiation is
distributed to all the walls in the zone. If you change geosurf (say 0,3
to one wall, and 0,7 to the others) Then the wall with geosurf 0,3 gets
30% of the incoming radiation.<o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
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'><o:p> </o:p></span></font></p>
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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'>Kind regards,<o:p></o:p></span></font></p>
</div>
<div>
<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>
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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'>Mariëlle Nuchelmans<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<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'> Julie Lestrade
[mailto:lestrade.julie@cedre-sophia.com] <br>
<b><span style='font-weight:bold'>Verzonden:</span></b> maandag 12 juli 2010
13:53<br>
<b><span style='font-weight:bold'>Aan:</span></b> <st1:PersonName w:st="on">trnsys-users@cae.wisc.edu</st1:PersonName><br>
<b><span style='font-weight:bold'>Onderwerp:</span></b> [TRNSYS-users] Wall
definition</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Dear Trnsys users,<br>
<br>
I was wondering about some details in the wall definition. <br>
<br>
1) Usually, the building I represent is insulated from the outside. When I
choose the layer that compose my wall I have an order (inside toward outside).
I was wondering if there was any importance in that ? Because it did not seem
to me that trnsys took into account the thermal bridges ? am I wrong ? <br>
<br>
2) how can we choose the solar absorbance of the wall ? is it calculated ? if
yes how ? if not how is it determined ? how can we determine it ?<br>
<br>
3) I read somewhere here that the geosurf should be set to 0. am I right ? if
yes why is that ? if not how do we choose the repartition ?<br>
<br>
4) What about the wall gain parameter ? I notice it is set to 0 by default and
in my results, the solar gains are equal to zero if there is no windows. Is
that because my wall gain is zero ? To my mind it's not really representative
of the reality. Should I put a wall gain different from 0 ? if yes how do I
choose ? <br>
<br>
Thank you for your feedbacks ! <br>
<br>
Julie</span></font><o:p></o:p></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;
background:white'><b><font size=1 color="#244061" face=Verdana><span
style='font-size:8.0pt;font-family:Verdana;color:#244061;font-weight:bold'>Julie
LESTRADE<br>
Ingénieur d'études<br>
<br>
</span></font></b><b><font size=2 color="#244061" face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:#244061;font-weight:bold'>CEDRE</span></font></b><b><font
size=1 color="#244061" face=Verdana><span style='font-size:8.0pt;font-family:
Verdana;color:#244061;font-weight:bold'><br>
</span></font></b><font size=1 color="#244061" face=Verdana><span
style='font-size:8.0pt;font-family:Verdana;color:#244061'>Ophira 1, 1 Place
Bermond<br>
06560 SOPHIA-ANTIPOLIS<br>
Tel : 04 92 96 03 77<br>
Port : 06 45 68 07 53</span></font><font face=Verdana><span style='font-family:
Verdana'><o:p></o:p></span></font></p>
<p class=MsoNormal style='background:white'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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