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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Hi Trnsys Users,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>I would like to know if it is possible to define a
boundary value for the FRONT SIDE of a wall directly. In page 6-103 (Type 56 - TRNSYS
16 Manual) it is said that : ”<i><span style='font-style:italic'>Normally,
the boundary condition is the temperature of a node connected to the back
surface of the wall through a pure resistance. It is possible to specify the
surface temperature of the outside by setting the back side heat transfer
coefficient of the WALL TYPE to a very small value (less than 0.001 kJ/h/m2).</span></i>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>So, I understand that if a coefficient with a value
of 0,001 kJ/h/m2 or lower is used, the boundary temperature corresponds to the
back side, and the only way I find to “transform” this back side
temperature into a front side temperature is using a very-low resistance (massless
layer) by using a high convective heat transfer coefficient in the front side. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Any idea would be highly appreciated.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Thanks,</span></font><span lang=EN-US> <o:p></o:p></span></p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0
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<td width=521 colspan=2 height=15 valign=top style='width:390.6pt;padding:
0cm 5.4pt 0cm 5.4pt;height:11.3pt'>
<p class=MsoNormal><a name="OLE_LINK8"></a><a name="OLE_LINK6"></a><a
name="OLE_LINK5"></a><a name="OLE_LINK4"></a><a name="OLE_LINK3"></a><a
name="OLE_LINK2"></a><a name="OLE_LINK1"><b><font size=1 color=black
face=Verdana><span lang=EN-US style='font-size:8.5pt;font-family:Verdana;
color:black;font-weight:bold'>Luis J. Claros Marfil<o:p></o:p></span></font></b></a></p>
</td>
</tr>
<tr height=15 style='height:11.3pt'>
<td width=521 colspan=2 height=15 valign=top style='width:390.6pt;padding:
0cm 5.4pt 0cm 5.4pt;height:11.3pt'>
<p class=MsoNormal><font size=1 color=black face=Verdana><span lang=EN-GB
style='font-size:7.5pt;font-family:Verdana;color:black'>Grupo de Materiales
Avanzados - Advanced Materials Group<o:p></o:p></span></font></p>
</td>
</tr>
<tr height=15 style='height:11.3pt'>
<td width=521 colspan=2 height=15 valign=top style='width:390.6pt;padding:
0cm 5.4pt 0cm 5.4pt;height:11.3pt'>
<p class=MsoNormal><font size=1 color=black face=Verdana><span lang=EN-GB
style='font-size:7.5pt;font-family:Verdana;color:black'>Centr</span></font><font
size=1 color=black face=Verdana><span lang=IT style='font-size:7.5pt;
font-family:Verdana;color:black'>o Tecnológico I+D+i - R & D <st1:place
w:st="on"><st1:PlaceName w:st="on">Technology</st1:PlaceName> <st1:PlaceType
w:st="on">Center</st1:PlaceType></st1:place><o:p></o:p></span></font></p>
</td>
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<tr height=15 style='height:11.3pt'>
<td width=521 colspan=2 height=15 valign=top style='width:390.6pt;padding:
0cm 5.4pt 0cm 5.4pt;height:11.3pt'>
<p class=MsoNormal><b><font size=1 color=red face=Verdana><span lang=EN-US
style='font-size:7.5pt;font-family:Verdana;color:red;font-weight:bold'>ACCIONA
Infraestructuras<br>
<img width=317 height=10 id="_x0000_i1025"
src="cid:image001.gif@01CC5101.8E6E6B40"><o:p></o:p></span></font></b></p>
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height:45.05pt'>
<p class=MsoNormal><font size=3 face=Tahoma><span lang=EN-US
style='font-size:12.0pt'><img width=140 height=60 id="_x0000_i1026"
src="cid:image002.gif@01CC5101.8E6E6B40"><u><o:p></o:p></u></span></font></p>
</td>
<td width=365 height=60 style='width:273.6pt;padding:0cm 5.4pt 0cm 5.4pt;
height:45.05pt'>
<p><font size=1 color=black face=Verdana><span style='font-size:7.5pt;
font-family:Verdana;color:black'>Valportillo II, nº8<br>
C.P. 28108 Alcobendas (Madrid) <br>
Tel.: +34 91 791 20 20<br clear=all>
Fax: +34 91 791 21
01
<br>
www.acciona-infraestructuras.es<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=1 color=red face=Verdana><span lang=EN-US
style='font-size:7.5pt;font-family:Verdana;color:red;font-weight:bold'><img
width=317 height=10 id="_x0000_i1027" src="cid:image003.gif@01CC5101.8E6E6B40"><o:p></o:p></span></font></b></p>
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<p class=MsoNormal style='margin-right:-4.05pt;text-align:justify'><font
size=5 color=green face=Webdings><span lang=EN-US style='font-size:18.0pt;
font-family:Webdings;color:green'>Q</span></font><font size=1 color=green
face=Webdings><span lang=EN-US style='font-size:7.5pt;font-family:Webdings;
color:green'> </span></font><font size=1 color=green face=Verdana><span
style='font-size:8.0pt;font-family:Verdana;color:green'>Antes de imprimir este
mensaje, asegúrate de que es necesario. </span></font><font size=1 color=green
face=Verdana><span lang=EN-US style='font-size:8.0pt;font-family:Verdana;
color:green'>Proteger el medio ambiente está también en tu mano.</span></font><font
size=1 color=green face=Verdana><span lang=EN-US style='font-size:8.0pt;
font-family:Verdana;color:green'><o:p></o:p></span></font></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<PRE>
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