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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'>Dear Karol,<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=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'>1) You recommend to set
resistance of whole wall (include cold bridge) in “cold bridge
window” (hmK/kJ) or resistance of “massless wall” (hm^2K/kJ).
It doesn't matter which way will be chosen, dimension of element will be the
same and only units will change m<->m^2.<o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
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'>No, you need the thermal
mass. The adjustment really depend on your wall construction.<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'>It is more adjusting the
u-value of layer (if poassible) and thereby of a wall.<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'>For a wall with
insulation I would increase the u-value for the insulation such that it
includes the loss of the cold bridge.<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>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Best regards,<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>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Marion<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>
<div>
<p class=MsoNormal><b><font size=2 color="#005a00" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#005A00;font-weight:bold'>Dipl.-Ing.
<st1:PersonName w:st="on">Marion Hiller</st1:PersonName> </span></font></b><b><font
size=2 color="#009900"><span style='font-size:10.0pt;color:#009900;font-weight:
bold'><br>
</span></font></b><b><font size=2 color="#007000" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#007000;font-weight:bold'>TRANSSOLAR:
KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort
in Gebäude </span></font></b><b><font size=1 color="#005a00" face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:#005A00;font-weight:bold'><br>
Munich - New York - Stuttgart + 49.711.67976.0 <br>
<br>
</span></font></b><b><font size=1 color=black face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:black;font-weight:bold'>Transsolar
Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart <br>
Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.:
DE152272639</span></font></b><font color=navy><span style='color:navy'><o:p></o:p></span></font>
</p>
<p class=MsoNormal><b><font size=1 color=black face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:black;font-weight:bold'>Geschäftsführer:
Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst,
Prof. Dipl.-Ing. Bleicher <o:p></o:p></span></font></b>
</p>
<div>
<p class=MsoNormal><font size=2 color=navy face=Calibri><span style='font-size:
11.0pt;color:navy'> </span></font><font size=3 color=navy
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman";
color:navy'><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>
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face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
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</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>Von:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Karol Bandurski
[mailto:karol.bandurski@put.poznan.pl] <br>
<b><span style='font-weight:bold'>Gesendet:</span></b> Freitag, 13. Juli 2012
10:06<br>
<b><span style='font-weight:bold'>An:</span></b> <st1:PersonName w:st="on">Marion
Hiller</st1:PersonName><br>
<b><span style='font-weight:bold'>Cc:</span></b> 'trnsys-users'<br>
<b><span style='font-weight:bold'>Betreff:</span></b> RE: [TRNSYS-users] cold
bridge</span></font><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font>
</p>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'>Dear Marion,<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'>Thank you very much for your
explanation!<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'>If I understand:<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'>1) You recommend to set
resistance of whole wall (include cold bridge) in “cold bridge
window” (hmK/kJ) or resistance of “massless wall” (hm^2K/kJ).
It doesn't matter which way will be chosen, dimension of element will be the
same and only units will change m<->m^2.<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'>2) In both case element will
be massless. So what can I do to account mass and heat capacity of wall and
cold bridge?<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'>Regards,<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 color="#4f81bd" face=Calibri><span
lang=EN-US style='font-size:11.0pt;color:#4F81BD'>Karol<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>-----Original Message-----<br>
From: <st1:PersonName w:st="on">Marion Hiller</st1:PersonName> [mailto:<st1:PersonName
w:st="on">hiller@transsolar.com</st1:PersonName>] <br>
Sent: Friday, July 13, 2012 9:03 AM<br>
To: karol.bandurski<br>
Cc: trnsys-users<br>
Subject: AW: [TRNSYS-users] cold bridge</span></font><span lang=PL><o:p></o:p></span>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Dear Karol,<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>If you define a "cold bridge" in TRNbuild the following
happens:<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>- Instead of defining layers as for a wall you define a "thermal
resistance"<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>(without mass effects) <o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>- Instead of setting an area as for a wall you define a lenght<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>However, in the end this cold bridge is treated as "a massless
wall".<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>If you use a detailed radiation mode, you can't add surfaces (and a
cold bridge would be surface somehow) in order to keep the geometry consistent.
<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>It is not recommended to draw very small surfaces in T3d to represent
the cold bridge unless you need the inside surface temperature because very
small surfaces may cause trouble for matrix generation.<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Therefore, the recommendation is to integrate the losses of a cold
bridge into the wall by adjusting the u-value of a wall as previously mentioned
by Adrien.<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>I hope this helps.<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Best regards,<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Marion<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Dipl.-Ing. <st1:PersonName w:st="on">Marion Hiller</st1:PersonName><o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>TRANSSOLAR: KlimaEngineering - Technologien für energieeffizientes
Bauen und Nutzerkomfort in Gebäude Munich - New York - Stuttgart +
49.711.67976.0 <o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart
Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.: <o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>DE152272639<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer,
Dipl.Phys. Stefan Holst, Prof. Dipl.-Ing. Bleicher <o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>-----Ursprüngliche Nachricht-----<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Von: Karol Bandurski <a
href="mailto:%5bmailto:karol.bandurski@put.poznan.pl%5d"><font color=black><span
style='color:windowtext;text-decoration:none'>[mailto:karol.bandurski@put.poznan.pl]</span></font></a>
<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Gesendet: Donnerstag, 12. Juli 2012 18:25<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>An: <a href="mailto:trnsys-users@cae.wisc.edu"><font color=black><span
style='color:windowtext;text-decoration:none'>trnsys-users@cae.wisc.edu</span></font></a><o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>Betreff: [TRNSYS-users] cold bridge<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><o:p> </o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>_______________________________________________<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'>TRNSYS-users mailing list<o:p></o:p></span></font>
</p>
<p class=MsoPlainText><font size=2 face=Calibri><span lang=PL style='font-size:
11.0pt'><a href="mailto:TRNSYS-users@cae.wisc.edu"><font color=black><span
style='color:windowtext;text-decoration:none'>TRNSYS-users@cae.wisc.edu</span></font></a><o:p></o:p></span></font>
</p>
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11.0pt'><a href="https://mailman.cae.wisc.edu/listinfo/trnsys-users"><font
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