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<font face="Franklin Gothic Medium"><strong><span style='font-family: "Tahoma","sans-serif";'>Ing. Mydory O. Nakasima L.</span><br></strong>Centro de Estudios de las Energías Renovables del Instituto de Ingeniería<br>Universidad Autónoma de Baja California, Campus Universitario. <br>Blvd. Benito Juárez y calle de la Normal s/n, Col. Insurgentes Este 21280. <br>Mexicali, Baja California, México. <br>Tel (686) 2-35-68-06 <br>E-mail: </font><a href="mailto:mydory.nakasima@hotmail.com"><font face="Franklin Gothic Medium">mydory.nakasima@hotmail.com</font></a><br><br> <BR><div>From: trnsys-users-request@cae.wisc.edu<br>Subject: TRNSYS-users Digest, Vol 105, Issue 16<br>To: trnsys-users@cae.wisc.edu<br>Date: Tue, 17 Sep 2013 12:00:02 -0500<br><br><pre>Send TRNSYS-users mailing list submissions to<br> trnsys-users@cae.wisc.edu<br> <br>To subscribe or unsubscribe via the World Wide Web, visit<br> <a href="https://mailman.cae.wisc.edu/listinfo/trnsys-users" target="_blank">https://mailman.cae.wisc.edu/listinfo/trnsys-users</a><br>or, via email, send a message with subject or body 'help' to<br> trnsys-users-request@cae.wisc.edu<br> <br>You can reach the person managing the list at<br> trnsys-users-owner@cae.wisc.edu<br> <br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of TRNSYS-users digest..."<br></pre><br><br>--Archivo adjunto de mensaje reenviado--<br>From: d.bradley@tess-inc.com<br>To: trnsys-users@cae.wisc.edu<br>Date: Mon, 16 Sep 2013 16:24:41 -0500<br>Subject: Re: [TRNSYS-users] Type 1716: ROTARY DESICANT DEHUMIDIFIER - Maximum air flow rate?<br><br>
Marcus,<br>
Make sure that you are using a short timestep (1-5 minutes) and
that there is enough thermal capacitance in your flow loops. It may
be that 10000 kg/h of air flowing through the device in the course
of one time step is causing the system to be unstable. There was a
recent post on this forum concerning a cooling tower connected to an
absorption chiller that turned out to be exactly the same problem;
far too much energy transferred in a system with far too little
capacitance for the time step selected. The time step has to be
shorter than the time constant of your system.<br>
Kind regards,<br>
David<br>
<br>
<br>
<div class="ecxmoz-cite-prefix">On 9/15/2013 08:36, Marcus wrote:<br>
</div>
<blockquote cite="mid:CAEzj1z4i778gOcb54Gq3vngejP=qDd0Fd-r3TACRX01m5cGQiA@mail.gmail.com">
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<div>I am running type 1716. When I run with 1000 kg/hr flow, it
simulates fine. When I increase to 10000, it causes
psychometric SAT error at -273K. <br>
<br>
</div>
So far, I will use the wheel at 1/10 the flow, and then multiply
after the wheel to get back to our design flow, just wondering
if this is a known bug or I suppose the model isn't valid at
such a flow rate? <br>
<br>
Cheers,<br>
Marcus<br>
</div>
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<pre>_______________________________________________
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</pre>
</blockquote>
<br>
<pre class="ecxmoz-signature">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="ecxmoz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="ecxmoz-txt-link-freetext" href="http://www.tess-inc.com" target="_blank">http://www.tess-inc.com</a>
<a class="ecxmoz-txt-link-freetext" href="http://www.trnsys.com" target="_blank">http://www.trnsys.com</a></pre>
<br><br>--Archivo adjunto de mensaje reenviado--<br>From: stefano.lazzari@unibo.it<br>To: trnsys-users@cae.wisc.edu<br>Date: Tue, 17 Sep 2013 11:24:04 +0200<br>Subject: [TRNSYS-users] TRNSYS3D plugin & SketchUp 8: surface recognition problem<br><br><style>
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</style><div class="ecxWordSection1"><p class="ecxMsoNormal"><span lang="EN-US">Dear Forum,</span></p><p class="ecxMsoNormal"><span lang="EN-US">I am a new user of TRNSYS 17 and SketchUp 8. After creating the geometry within SketchUp (paying attention to draw always “inside” each activated zone) I saved both .skp and .idf files without getting error messages. Then, I opened the .skp file in SkethUp to proceed with the matching of adjacent surfaces. However, when I activate a zone some (many) surfaces are not recognized by the Object Info Tool (they can be selected on screen but are simply not seen by the Object Info Tool: the area showing Object Inputs properties is blank and the gray text “No EnergyPlus object selected” appears). Where I am wrong? Since the geometry is quite complicated, I hope I do not need to rebuild it from scratch…</span></p><p class="ecxMsoNormal"><span lang="EN-US">Thank you very much for your help.</span></p><p class="ecxMsoNormal"><span lang="EN-US">Regards,</span></p><p class="ecxMsoNormal"><span lang="EN-US"> </span></p><p class="ecxMsoNormal"><span lang="EN-US">Stefano Lazzari </span></p><p class="ecxMsoNormal"><span lang="EN-US"> </span></p><div><p class="ecxMsoNormal"><span style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span lang="EN-US" style='font-family: "Times New Roman","serif"; font-size: 12pt;'>Dr. Eng. Ph.D. Stefano Lazzari<br>Department of Industrial Engineering (DIN)<br>School of Engineering and Architecture, University of Bologna<br>Viale del Risorgimento 2, I-40136 Bologna, Italy<br>Tel. </span><span lang="FR" style='font-family: "Times New Roman","serif"; font-size: 12pt;'>[+39] 051 2093383 Fax [+39] 051 2093296<br>Homepage: http://www.unibo.it/docenti/stefano.lazzari<br>E-mail: stefano.lazzari@unibo.it</span></p></div></div><br><br>--Archivo adjunto de mensaje reenviado--<br>From: mali@masdar.ac.ae<br>To: trnsys-users@cae.wisc.edu<br>Date: Tue, 17 Sep 2013 13:44:44 +0400<br>Subject: Re: [TRNSYS-users] TRNSYS3D plugin & SketchUp 8: surface recognition problem<br><br><style>
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</style><div class="ecxWordSection1"><p class="ecxMsoNormal"><a name="_MailEndCompose" target="_blank"><span style="color: rgb(31, 73, 125);">You probably need to open .idf file in sketchup instead of .skp file.</span></a></p><p class="ecxMsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p><div><p class="ecxMsoNormal"><span style="color: rgb(31, 73, 125);">Thanks,</span></p><p class="ecxMsoNormal"><span style="color: rgb(31, 73, 125);">Tauha</span></p></div><p class="ecxMsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p><div><div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) currentColor currentColor; padding: 3pt 0cm 0cm;"><p class="ecxMsoNormal"><b><span style='font-family: "Tahoma","sans-serif"; font-size: 10pt;'>From:</span></b><span style='font-family: "Tahoma","sans-serif"; font-size: 10pt;'> trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu] <b>On Behalf Of </b>Stefano Lazzari<br><b>Sent:</b> Tuesday, September 17, 2013 1:24 PM<br><b>To:</b> trnsys-users@cae.wisc.edu<br><b>Subject:</b> [TRNSYS-users] TRNSYS3D plugin & SketchUp 8: surface recognition problem</span></p></div></div><p class="ecxMsoNormal"> </p><p class="ecxMsoNormal">Dear Forum,</p><p class="ecxMsoNormal">I am a new user of TRNSYS 17 and SketchUp 8. After creating the geometry within SketchUp (paying attention to draw always “inside” each activated zone) I saved both .skp and .idf files without getting error messages. Then, I opened the .skp file in SkethUp to proceed with the matching of adjacent surfaces. However, when I activate a zone some (many) surfaces are not recognized by the Object Info Tool (they can be selected on screen but are simply not seen by the Object Info Tool: the area showing Object Inputs properties is blank and the gray text “No EnergyPlus object selected” appears). Where I am wrong? Since the geometry is quite complicated, I hope I do not need to rebuild it from scratch…</p><p class="ecxMsoNormal">Thank you very much for your help.</p><p class="ecxMsoNormal">Regards,</p><p class="ecxMsoNormal"> </p><p class="ecxMsoNormal">Stefano Lazzari </p><p class="ecxMsoNormal"> </p><div><p class="ecxMsoNormal"><span lang="IT" style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span lang="IT" style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span lang="IT" style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span lang="IT" style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span lang="IT" style='font-family: "Times New Roman","serif"; font-size: 12pt;'> </span></p><p class="ecxMsoNormal"><span style='font-family: "Times New Roman","serif"; font-size: 12pt;'>Dr. Eng. Ph.D. Stefano Lazzari<br>Department of Industrial Engineering (DIN)<br>School of Engineering and Architecture, University of Bologna<br>Viale del Risorgimento 2, I-40136 Bologna, Italy<br>Tel. </span><span lang="FR" style='font-family: "Times New Roman","serif"; font-size: 12pt;'>[+39] 051 2093383 Fax [+39] 051 2093296<br>Homepage: <a href="http://www.unibo.it/docenti/stefano.lazzari" target="_blank">http://www.unibo.it/docenti/stefano.lazzari</a><br>E-mail: <a href="mailto:stefano.lazzari@unibo.it">stefano.lazzari@unibo.it</a></span></p></div></div></div> </div></body>
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