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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D">I understand your point, I have no clearer idea still...<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D">I suggest to check the QCOMI and QCOMO of the bui surfaces, trying to get some more information to understand what trnsys is doing!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D">Best<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D">Stefano<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">EURAC research</span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">Institute for Renewable Energy<br>
Via Luis-Zuegg 11, I-39100 Bolzano</span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">t +39 0471 055 654</span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">f +39 0471 055 699</span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB"><a href="mailto:stefano.avesani@eurac.edu"><span lang="EN-GB">stefano.avesani@eurac.edu</span></a></span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-GB"><a href="http://www.eurac.edu/" title="http://www.eurac.edu/"><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif"">www.eurac.edu</span></a></span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB"> </span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB"> </span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">EURAC research</span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">Legal Seat</span><span lang="IT" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB">Viale Druso 1, I-39100 Bolzano</span><span lang="IT" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D;mso-fareast-language:EN-GB"> </span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:20.0pt;font-family:Webdings;color:#00B050;mso-fareast-language:EN-GB">P</span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#00B050;mso-fareast-language:EN-GB">
</span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#00B050;mso-fareast-language:EN-GB">Think before you print</span><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu]
<b>On Behalf Of </b>Pauline GELIN<br>
<b>Sent:</b> Wednesday, 02 October, 2013 08:40<br>
<b>To:</b> TRNSYS users mailing list at the Solar Energy Lab, UW-Madison<br>
<b>Subject:</b> Re: [TRNSYS-users] us of Coldbridges<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello,
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you for your answer.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As I wrote, there is only one wall of 1m² and with a coefficient of 1W/m²K and the coldbridge.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The boundary condition for the wall is 20°C and the inside temperature is 19°C.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The coldbridge is linked to a orientation with no radiation and a outdoor temperature and tsky of 20°C.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The static loss output (QUA) well gives me 2 W but for me the QSENS output doesn’t give me that but a result of 6 W. How can you explain that?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As I wrote before it seems to have a factor of 5 when I change resistance values or lengths of coldbridge.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Moreover, if I change the coldbridge as a wall with also a orientation with no radiation and a fixed outdoor temperature, I have also approximately the same
factor between the result I expect and what I have for QSENS output. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you in advance if you have an idea.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">Pauline GELIN<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">Ingénieur Conception environnementale<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D"><img border="0" width="81" height="13" id="_x0000_i1026" src="cid:image002.jpg@01CEC8CF.56F58700" alt="cid:image006.jpg@01CE062A.F4C2C000"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">69120 VAULX EN VELIN<o:p></o:p></span></p>
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<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">Ligne directe : 04.37.45.33.47<o:p></o:p></span></b></p>
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<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="FR" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">De :</span></b><span lang="FR" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
<a href="mailto:trnsys-users-bounces@cae.wisc.edu">trnsys-users-bounces@cae.wisc.edu</a> [<a href="mailto:trnsys-users-bounces@cae.wisc.edu">mailto:trnsys-users-bounces@cae.wisc.edu</a>]
<b>De la part de</b> Avesani Stefano<br>
<b>Envoyé :</b> lundi 30 septembre 2013 11:20<br>
<b>À :</b> TRNSYS users mailing list at the Solar Energy Lab, UW-Madison; David BRADLEY<br>
<b>Objet :</b> Re: [TRNSYS-users] us of Coldbridges<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D">Hi Pauline,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D">We are deeping the issue of thermal bridges in TRNSYS trying to find the best way of simulating this. What I am trying to simulate is a very simple zone
with just one thermal bridge as transmitting external surface. Actually the QSENS calculated is coherent with the whole zone energy balance (of which the CBR “surface” is just one component and the other surfaces contribute to the energy balance even if they
are set with BC identical). The heat flux lost through the CBR is then coherent with the formula q[W] = psi*l*deltaT.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D">What kind of zone have you used? Other surfaces? Which BC?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D">Looking forward to finding a good answer!<br>
kind regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
<a href="mailto:trnsys-users-bounces@cae.wisc.edu">trnsys-users-bounces@cae.wisc.edu</a> [<a href="mailto:trnsys-users-bounces@cae.wisc.edu">mailto:trnsys-users-bounces@cae.wisc.edu</a>]
<b>On Behalf Of </b>Pauline GELIN<br>
<b>Sent:</b> Thursday, 19 September, 2013 13:35<br>
<b>To:</b> David BRADLEY; trnsys-users (<a href="mailto:trnsys-users@cae.wisc.edu">trnsys-users@cae.wisc.edu</a>)<br>
<b>Subject:</b> [TRNSYS-users] us of Coldbridges<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span class="hps"><span lang="EN" style="color:windowtext">Hi,
<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="hps"><span lang="EN" style="color:windowtext"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="hps"><span lang="EN" style="color:windowtext">Sorry to multiply the questions but I I try to consolidate our simulations of buildings and another question remains about how the values of resistance and length for a coldbridge
are used.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="hps"><span lang="EN"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="hps"><span lang="EN">When I want to </span></span><span class="hps"><span lang="EN" style="color:windowtext">simulate a very simple
</span></span><span class="hps"><span lang="EN">building zone (one wall of 1m² with a U equals to 1W/m²K and one coldbridge of 1m with a U equals to 1W/mK) , with no weather data, a constant outside temperature of 19° and a constant inside temperature of 20°C,
the QUA output (meaning static losses transmission) is well given as 2 W but the QSENS outputs isn’t (it seems to be equal to 6 W).
<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="hps"><span lang="EN">When I change lengths or resistance values,
</span></span><span lang="EN" style="color:windowtext">it always seems to have a factor of 5 between the input value of coldbridge and the output value of QSENS.
</span><span style="color:windowtext"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="hps">Could someone explain this to me?</span><span class="hps"><span lang="FR"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="hps"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="hps">Thank you very much for your help. <o:p></o:p></span></p>
<p class="MsoNormal"><span class="hps"><o:p> </o:p></span></p>
<p class="MsoNormal">Best regards,<span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><b><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">Pauline GELIN<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">Ingénieur Conception environnementale<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D"><img border="0" width="99" height="65" id="Image_x0020_1" src="cid:image003.jpg@01CEC8CF.56F58700" alt="cid:image004.jpg@01CE062A.F4C2C000"></span><span lang="FR" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D"><img border="0" width="101" height="16" id="Image_x0020_2" src="cid:image004.jpg@01CEC8CF.56F58700" alt="cid:image006.jpg@01CE062A.F4C2C000"></span><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">10 avenue des canuts<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">69120 VAULX EN VELIN<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D">T : 04.37.45.33.33
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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