<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3">Dear Mr. Bradley</font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3"> </font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3"><span style="mso-spacerun: yes"> </span>Many thanks for your patient reply!</font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3"><span style="mso-spacerun: yes"> </span>1) Firstly, I only defined one Thermal Airnode in one zone, two External nodes, two Large opening. So I guess the reason is not the first you said. But I found the definition of Large opening, especially For Closed Opening: flow coefficient Cs per m crack is 0.0001 kg/s/m at 1 Pa. Moreover, I found indeed the hot air escapes from the zone about 2.42 kg/h after I set the OF as 0 (</font><a name="OLE_LINK2"><font size="3">from 6 pm to 8 am</font></a><font size="3">). But when I set Cs as 0 kg/s/m at 1 Pa, moreover, I defined wind pressure coefficients Cp as 0 for 2 external nodes, there is still a </font><a name="OLE_LINK5"><font size="3">WEIRD thing</font></a><font size="3">: the CO2% still decreases, however, </font><a name="OLE_LINK4"><font size="3">the hot air escapes from the zone about </font></a><font size="3"><span style="mso-bookmark: OLE_LINK4">0.65 kg</span><span style="mso-bookmark: OLE_LINK4">/h (which is almost the same from 6 pm to 8 am) after I set the OF as 0</span>. I guess COMIS maybe still has an default although OF is 0 and Cs is 0 kg/s/m. But I indeed need CO2% as a constant after OF is 0.<span style="mso-spacerun: yes"> </span></font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3"> </font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3">2) For your second reason, I checked the COMIS documentation. I found </font><a name="OLE_LINK3"><font size="3">Air Flow calculation</font></a><font size="3"> is a steady state simulation, however, the Pollutant Transport is calculated with a dynamic model. Whether CO2% decreases due to this reason i.e. COMIS is trying to predict CO2%, when OF is 0 (Air Flow calculation), however, CO2% is still calculated by COMIS (after OF is 0 during this simulation step). But like 1), the hot air escapes from the zone about 0.65 kg/h (which is almost the same from 6 pm to 8 am) after I set the OF as 0. Hence, I think this reason 2) is still not reasonable. Moreover, I found although TRNFlow ‘s engine is COMIS, for some issues, the manuals of both of them COMIS and TRNFlow are still not clear and relative completely. Could you introduce other references or COMIS (EMPA) guys to give me an exact answer for this WEIRD thing? Because it troubles me for a long time. I need find </font><a name="OLE_LINK6"><font size="3">the stable PID parameters</font></a><font size="3"> to control OF which can keep CO2% under or at the set-point 1000 ppm. Until now, I found the stable PID parameters for one day, but due to CO2% decreases after OF is 0 from 6 pm. Hence, the stable PID parameters for one day don’t work for next day from 8 am. Please see the ATTACHED. The stable PID parameters maybe are too large for next day’s CO2%.</font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3"> </font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3">3) For your third reason, I only defined 2 Large opening not including fans and ducts etc. by TRNFlow, maybe you think they two large opening are a true Mechanical ventilation system? </font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3"> </font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3">Many thanks in advance!</font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3"> </font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><font size="3"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US">Br.</span></span><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"></span></span></font></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3"> </font></span></span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><span class="apple-style-span"><span style="FONT-FAMILY: Arial; COLOR: black" lang="EN-US"><font size="3">wang</font></span></span></p><br><br>
<div class="gmail_quote">2011/9/30 David BRADLEY <span dir="ltr"><<a href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>></span><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div text="#000000" bgcolor="#FFFFFF">Wang,<br> I will preface this by mentioning that I am not an expert in the TRNFlow part of Type56. <br><br> It is a little hard to know what is going on without knowing anything about the building. However, if you have multiple zones in the building, I imagine that there would be some air mixing going on between zones due to internal temperature and height differences and the CO2 concentration would decrease in one zone while increasing in another. <br>
<br> I would also recommend looking at the COMIS documentation (COMIS is the engine that underlies TRNFlow) to see whether its algorithms are trying to predict CO2 concentration at a particular point in the space (like we do in Type56 for comfort calculations at a particular point in a zone) or whether it is assuming a fully mixed zone as far as the CO2 level is concerned. If COMIS is calculating concentration at a point and the air continues to mix after your opening factor has gone to zero then that might explain the decrease.<br>
<br> Lastly, your mechanical ventilation system might have something to do with the decrease; If you are actively supplying air to the space after the opening factor is zero and if the mechanical ventilation system has some outdoor air associated with it then that also would explain the decrease in CO2 level.<br>
<br>Regards,<br> David
<div>
<div></div>
<div class="h5"><br> <br><br>On 9/30/2011 08:47, 王洋 wrote:
<blockquote type="cite">
<div>Dear all,</div>
<div> </div>
<div> I simulated CO2 concentration changes using TRNFlow. But there is a STRANGE phenomenon. There are 2 occupants from 8am to 6 pm, CO2% is controlled by PID controller which controls Opening Factor (OF) of window at the set-point 1000 ppm. From 6 pm, there are no occupants, OF is 0, there is no infiltration in TRNBuild (Certainly, infiltration in TRNBuild indeed will inactivate when couping TRNFlow based on TRNFlow Manual). However, from 6 pm, CO2% begins to decrease. It's extremely strange!</div>
<div> </div>
<div> Which relative expert can expain that? Or give me some advices for that? I am puzzled for a long time.</div>
<div> </div>
<div> Many thanks in advance!</div>
<div> </div>
<div> br</div>
<div> </div>
<div> wang<br><br></div>
<div class="gmail_quote">2011/9/30 <span dir="ltr"><<a href="mailto:trnsys-users-request@cae.wisc.edu" target="_blank">trnsys-users-request@cae.wisc.edu</a>></span><br>
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<br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of TRNSYS-users digest..."<br><br>Today's Topics:<br><br> 1. Using Excel as Load Profile (Pei Ru Chao)<br> 2. TRNSYS error 300 (<a href="mailto:torres.carlos-moises@lte.ireq.ca" target="_blank">torres.carlos-moises@lte.ireq.ca</a>)<br>
3. Direct expansion solar collector (Mohamad Azly Abd Aziz (Ir))<br> 4. simulation studio crash when updating project (Antoine Gautier)<br><br><br>---------- 已转发邮件 ----------<br>From: Pei Ru Chao <<a href="mailto:simplica1@hotmail.com" target="_blank">simplica1@hotmail.com</a>><br>
To: TRNSYS <<a href="mailto:trnsys-users@cae.wisc.edu" target="_blank">trnsys-users@cae.wisc.edu</a>><br>Date: Fri, 30 Sep 2011 16:31:53 +1000<br>Subject: [TRNSYS-users] Using Excel as Load Profile<br>
<div>
<div dir="ltr">Hi all,
<div><br></div>
<div>As a newbie I am wondering how to use Excel for load profile input. Can anyone point me in the right direction as to how to use a Data Reader to do this? For example, can the Data Reader read 10920 rows of data? In 9a for example, Parameter 2 asks how many values of input to read and the maximum is only 98?</div>
<div><br></div>
<div>Thanks</div>
<div><br></div>
<div>Pei</div>
<div><br></div>
<div><br></div></div></div><br><br>---------- 已转发邮件 ----------<br>From: <<a href="mailto:torres.carlos-moises@lte.ireq.ca" target="_blank">torres.carlos-moises@lte.ireq.ca</a>><br>To: <<a href="mailto:trnsys-users@cae.wisc.edu" target="_blank">trnsys-users@cae.wisc.edu</a>><br>
Date: Thu, 29 Sep 2011 15:50:36 -0400<br>Subject: [TRNSYS-users] TRNSYS error 300<br>
<div>
<div><font size="2" face="Arial"><span>Dear all,</span></font></div>
<div><font size="2" face="Arial"><span></span></font> </div>
<div><font size="2" face="Arial"><span>Whenever I ry to run a type 56 simulation in TRNSED I am given the following error even though the same program runned perfectly in TRNEdit</span></font></div>
<div><font size="2" face="Arial"><span><span lang="FR-CA"></span></span></font> </div>
<div><font size="2" face="Arial"><span><span lang="FR-CA"> ***** ERROR ***** TRNSYS ERROR # 300<br> UNABLE TO START PROGRAM IN CALLPROGRAM UTILITY<br> PLEASE CHECK PATH AND PROGRAM NAME, THIS MAY BE A PROBLEM IN TYPE 66<br>
<br>*** Fatal Error at time : 0.000000<br> Generated by Unit : Not applicable or not available<br> Generated by Type : Not applicable or not available<br> TRNSYS Message 300 : The TRNSYS Program attempted to evaluate an EQUATION that raised a negative number to a non-integer value. Please check the EQUATION formulation and re-run the simulation<br>
Reported information : Not available</span></span></font></div>
<div><font size="2" face="Arial"><span><span lang="FR-CA"></span></span></font> </div>
<div><font size="2" face="Arial"><span><span lang="FR-CA">the message is not very helpfull and I don't even use Type 66 in my simulation and I checked all my equations and nothing obvious comes to view.</span></span></font></div>
<div><font size="2" face="Arial"><span><span lang="FR-CA"></span></span></font> </div>
<div><font size="2" face="Arial"><span><span lang="FR-CA">Is there any known solution to this problem? If need be I can send you the files im using.</span></span></font></div>
<div><font size="2" face="Arial"><span><span lang="FR-CA"></span></span></font> </div>
<div><font size="2" face="Arial"><span><span lang="FR-CA">Thank you</span></span></font></div>
<div> </div>
<div align="left">
<div><font size="2" face="Arial"><span>Carlos Torres</span></font></div>
<div><font size="2" face="Arial"><span>Stagiaire universitaire</span></font></div>
<div><font size="2" face="Arial"><span>Laboratoire des technologies de l'énergie (LTE)</span></font><font size="2" face="Arial"><span></span></font></div></div>
<div> </div></div><br><br>---------- 已转发邮件 ----------<br>From: "Mohamad Azly Abd Aziz (Ir)" <<a href="mailto:AZLY@jkr.gov.my" target="_blank">AZLY@jkr.gov.my</a>><br>To: "<a href="mailto:trnsys-users@cae.wisc.edu" target="_blank">trnsys-users@cae.wisc.edu</a>" <<a href="mailto:trnsys-users@cae.wisc.edu" target="_blank">trnsys-users@cae.wisc.edu</a>><br>
Date: Fri, 30 Sep 2011 04:36:25 -0700<br>Subject: [TRNSYS-users] Direct expansion solar collector<br>
<div lang="EN-MY" link="blue" vlink="purple">
<div>
<p class="MsoNormal">Hi</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I wonder whether someone has come-out with heat pump type with direct expansion solar collector/evaporator?.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Regards</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Azly </p></div></div><br><br>---------- 已转发邮件 ----------<br>From: "Antoine Gautier" <<a href="mailto:antoine.gautier@solamen.fr" target="_blank">antoine.gautier@solamen.fr</a>><br>To: <<a href="mailto:trnsys-users@cae.wisc.edu" target="_blank">trnsys-users@cae.wisc.edu</a>><br>
Date: Fri, 30 Sep 2011 13:48:10 +0200<br>Subject: [TRNSYS-users] simulation studio crash when updating project<br>
<div lang="FR" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><span lang="EN-US">Dear all</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">I cannot update my project any more without crashing simulation studio (*.tpf and *.b17 in attachment).</span></p>
<p class="MsoNormal"><span lang="EN-US">Is there another way to update the input list for Type56 so that I can keep on working?</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks a lot for your help.</span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards</span></p>
<p class="MsoNormal"><span style="COLOR: #404040" lang="EN-US">--</span></p>
<p class="MsoNormal"><span style="COLOR: #404040" lang="EN-US">Antoine Gautier<br>Solam</span><span style="COLOR: #70b221" lang="EN-US">en</span><span style="COLOR: black" lang="EN-US"><br></span><span style="COLOR: #404040" lang="EN-US"><a href="tel:%2B33%206%2098%2078%2056%2046" target="_blank" value="+33698785646">+33 6 98 78 56 46</a></span></p>
<p class="MsoNormal"><span style="COLOR: #404040" lang="EN-US">antoine.gautier@so</span><span style="COLOR: #404040"><a href="http://lamen.fr/" target="_blank">lamen.fr</a></span><span style="COLOR: black"></span></p>
<p class="MsoNormal"> </p></div></div><br>_______________________________________________<br>TRNSYS-users mailing list<br><a href="mailto:TRNSYS-users@cae.wisc.edu" target="_blank">TRNSYS-users@cae.wisc.edu</a><br><a href="https://mailman.cae.wisc.edu/listinfo/trnsys-users" target="_blank">https://mailman.cae.wisc.edu/listinfo/trnsys-users</a><br>
<br></blockquote></div><br><br>
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</pre></blockquote><br></div></div><pre cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:<a href="tel:%2B1.608.274.2577" target="_blank" value="+16082742577">+1.608.274.2577</a>
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<a href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>
<a href="http://www.tess-inc.com/" target="_blank">http://www.tess-inc.com</a>
<a href="http://www.trnsys.com/" target="_blank">http://www.trnsys.com</a></pre></div></blockquote></div><br>