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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">TRNFlow is an adapted version of COMIS.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">You may check the literature:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">TN 29: Fundamentals of the Multizone Air Flow Model- COMIS<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">The COMIS Fundamentals contains an overview about Infiltration modelling as well as the physics and the mathematics behind the COMIS
model.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">The COMIS (standalone) is available from https://github.com/jasondegraw/COMIS3<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Marion<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#005A00;mso-fareast-language:DE-CH">-----------------------------------------------------------------------------------------------------------------------------------------------------------</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:DE-CH">
<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#005A00;mso-fareast-language:DE-CH">Dipl.-Ing. Marion Hiller </span></b><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#009900;mso-fareast-language:DE-CH"><br>
</span></b><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#007000;mso-fareast-language:DE-CH">TRANSSOLAR Energietechnik GmbH </span></b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue;mso-fareast-language:DE-CH"><br>
</span><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#005A00;mso-fareast-language:DE-CH">Stuttgart - Munich - New York - Paris
</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#007000;mso-fareast-language:DE-CH"> <o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#007000;mso-fareast-language:DE-CH">t:
<a href="tel:%2B49.711.67976.27" target="_blank"><span style="color:#007000">+49.711.67976.0</span></a> f:
<a href="tel:%2B49.711.67976.11" target="_blank"><span style="color:#007000">+49.711.67976.11</span></a></span></b><span style="font-size:13.5pt;font-family:"Helvetica",sans-serif;color:#007000;mso-fareast-language:DE-CH"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#0070C0;mso-fareast-language:DE-CH"><a href="http://www.transsolar.com/" target="_blank"><span style="color:#0070C0">www.transsolar.com/</span></a></span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#005A00;mso-fareast-language:DE-CH"> <br>
<br>
</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;mso-fareast-language:DE-CH">KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden <span style="color:#005A00"><br>
</span>Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart <o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;mso-fareast-language:DE-CH">Amtsgericht Stuttgart - HRB 23347</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;mso-fareast-language:DE-CH">
</span></b><b><span style="font-size:7.5pt;font-family:"Arial",sans-serif;mso-fareast-language:DE-CH">/ Steuernummer: 99073/00911 / USt-IdNr.: DE 152272639</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;mso-fareast-language:DE-CH"><br>
Geschäftsführer: Matthias Schuler, Thomas Auer, Stefan Holst, Dieter Schnelle </span></b><span style="font-size:13.5pt;font-family:"Helvetica",sans-serif;mso-fareast-language:DE-CH"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Arnaud Candaele [mailto:frodooon@gmail.com]
<br>
<b>Gesendet:</b> Dienstag, 11. Juli 2017 13:12<br>
<b>An:</b> Marion Hiller <Hiller@Transsolar.com><br>
<b>Cc:</b> TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org><br>
<b>Betreff:</b> Re: [TRNSYS-users] TRNBUILD/TRNFLOW air density<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Thank you.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">But in TRNFLOW then, how is density updated with temperature? What is the mathematical relationship?<o:p></o:p></p>
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<p class="MsoNormal">Thanks a lot,<o:p></o:p></p>
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<p class="MsoNormal">Arnaud.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2017-07-11 10:45 GMT+02:00 Marion Hiller <<a href="mailto:Hiller@transsolar.com" target="_blank">Hiller@transsolar.com</a>>:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Arnaud,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">For the coupling of the models, the nodal airflow model and the thermal energy balance model, everything
is based on mass flows.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">For the airflow model (TRNFLow) the density in an airnode varies whereas for the thermal model of Type56
the density doesn’t change. It’s defined in the dialog “properties”.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">I’m not aware the densities are available as outputs.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span lang="EN-US">Furthermore, if I try plotting the TRNFLOW output "ACHZ" for on zone in a very simple test model (external node --> duct --> zone --> fan ---> external node), to get
an idea of the volumetric flow rate, i got zero value (although other indicators, such as FLNEL show me coherent mass flow rate).</span><o:p></o:p></p>
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<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:0cm;mso-list:l0 level1 lfo1">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">In general, output 210 “ACHZ” should give an output. You may sent your simple examples to your distributor and ask for further help.</span><o:p></o:p></li></ul>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Marion</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#005A00">-----------------------------------------------------------------------------------------------------------------------------------------------------------</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#005A00">Dipl.-Ing. Marion Hiller </span></b><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#009900"><br>
</span></b><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#007000">TRANSSOLAR Energietechnik GmbH </span></b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue"><br>
</span><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#005A00">Stuttgart - Munich - New York - Paris
</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#007000"> </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#0070C0"><a href="http://www.transsolar.com/" target="_blank"><span style="color:#0070C0">www.transsolar.com/</span></a></span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#005A00"> <br>
<br>
</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif">KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden <span style="color:#005A00"><br>
</span>Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif">Amtsgericht Stuttgart - HRB 23347</span></b><b><span style="font-size:7.5pt;font-family:"Arial",sans-serif">
/ Steuernummer: 99073/00911 / USt-IdNr.: DE 152272639</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial",sans-serif"><br>
Geschäftsführer: Matthias Schuler, Thomas Auer, Stefan Holst, Dieter Schnelle </span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> TRNSYS-users [mailto:<a href="mailto:trnsys-users-bounces@lists.onebuilding.org" target="_blank">trnsys-users-bounces@lists.onebuilding.org</a>]
<b>Im Auftrag von </b>Arnaud Candaele via TRNSYS-users<br>
<b>Gesendet:</b> Donnerstag, 6. Juli 2017 15:03<br>
<b>An:</b> <a href="mailto:trnsys-users@cae.wisc.edu" target="_blank">trnsys-users@cae.wisc.edu</a><br>
<b>Betreff:</b> [TRNSYS-users] TRNBUILD/TRNFLOW air density</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Hello,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">I'd like to know where I could find details about the assumptions taken in TRNBUILD/TRNFLOW to compute the air density is a room (or in a TRNFLOW link). None of the outputs give this
information (if I'm not mistaken!), and all flow rates are expressed in kg/h.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Furthermore, if I try plotting the TRNFLOW output "ACHZ" for on zone in a very simple test model (external node --> duct --> zone --> fan ---> external node), to get an idea of the volumetric
flow rate, i got zero value (although other indicators, such as FLNEL show me coherent mass flow rate).<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Can somebody help me on this subject?<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Best regards,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Arnaud.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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