<div dir="ltr">Hello,<div><br></div><div>Is there anyone able to answer my questions below? Many thanks</div><div><br></div><div>Best regards,</div><div><br></div><div>Yang</div><div><div class="gmail_extra"><br><div class="gmail_quote">2017-08-02 10:53 GMT+01:00 WANG Yang <span dir="ltr"><<a href="mailto:wanghongyang1767@gmail.com" target="_blank">wanghongyang1767@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><font size="4">Dear all,</font><div><font size="4"><br></font></div><div><font size="4">I'd like to ask you one question about the error for Radiator Type 1231 shown in attached picture.</font></div><div><font size="4"><br></font></div><div><font size="4">I used its heat transfer rate output to connect Type 56's own-defined input as the heating power. Then it appears that error. If I delete Radiator Type 1231, it runs well.</font></div><div><font size="4"><br></font></div><div><font size="4">Many thanks</font></div><div><font size="4"><br></font></div><div><font size="4">Br.</font></div><div><font size="4"><br></font></div><div><font size="4">Yang </font></div><div><div class="gmail_extra"><br><div class="gmail_quote">2017-08-01 21:12 GMT+01:00 via TRNSYS-users <span dir="ltr"><<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.<wbr>onebuilding.org</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Send TRNSYS-users mailing list submissions to<br>
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<br>Today's Topics:<br>
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1. Re: variable timestep (Domenico Mazzeo via TRNSYS-users)<br>
2. Re: Exact same control signal for different Type 11f gives<br>
diferent results. (Jeff Thornton via TRNSYS-users)<br>
<br><br>---------- 已转发邮件 ----------<br>From: Domenico Mazzeo via TRNSYS-users <<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.<wbr>onebuilding.org</a>><br>To: "TRNSYS users mailing list at OneBuilding.org" <<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.<wbr>onebuilding.org</a>>, Jeff Thornton <<a href="mailto:thornton@tess-inc.com" target="_blank">thornton@tess-inc.com</a>><br>Cc: Jorge Facao <<a href="mailto:jorge.facao@lneg.pt" target="_blank">jorge.facao@lneg.pt</a>><br>Bcc: <br>Date: Tue, 1 Aug 2017 18:09:08 +0200<br>Subject: Re: [TRNSYS-users] variable timestep<br><div dir="auto">You could run more simulation with different time steps.<div dir="auto">Then you could join the results with a variable time step.</div><div dir="auto">Regards</div></div><div class="gmail_extra"><br><div class="gmail_quote">Il 01 Ago 2017 16:53, "Jeff Thornton via TRNSYS-users" <<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.onebuildin<wbr>g.org</a>> ha scritto:<br type="attribution"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">No, TRNSYS uses a fixed time step for the duration of the simulation.<br>
<br>
Jeff<br>
<br>
Sent from my iPhone<br>
<br>
> On Jul 31, 2017, at 11:10 AM, Jorge Facao via TRNSYS-users <<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.onebuildin<wbr>g.org</a>> wrote:<br>
><br>
> Hello,<br>
> Is it possible to run a simulation with variable time-step in TRNSYS 17?<br>
> I have tried to put a time-step as a string in control cards but TRNSYS<br>
> consider the initial value of the string for all simulation.<br>
> Thanks in advance and best regards,<br>
><br>
> --<br>
> Jorge Facão<br>
><br>
> Laboratório Nacional de Energia e Geologia (LNEG)<br>
> Laboratório de Energia Solar<br>
> Estrada do Paço do Lumiar, 22<br>
> 1649-038 Lisboa - Portugal<br>
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<div style="font-size:1.3em">------------------------------<wbr>------------------------------<wbr>-------------------</div><div><font face="Arial, Helvetica, sans-serif">Il banner è generato automaticamente dal servizio di posta elettronica dell'Università della Calabria</font></div><div><font face="Arial, Helvetica, sans-serif"><br></font></div><div><a href="http://www.unical.it" target="_blank"><img src="http://www.unical.it/portale/strutture/centri/centroict/banner_immatricolazione_25.jpg"></a></div><br><br>---------- 已转发邮件 ----------<br>From: Jeff Thornton via TRNSYS-users <<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.<wbr>onebuilding.org</a>><br>To: <a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.<wbr>onebuilding.org</a><br>Cc: <br>Bcc: <br>Date: Tue, 01 Aug 2017 14:57:14 -0500<br>Subject: Re: [TRNSYS-users] Exact same control signal for different Type 11f gives diferent results.<br><u></u>
<div>
<p>Javier,</p>
<p>That sounds suspiciously like a convergence problem. Have you checked the list file to see if you are running into convergence issues? Have you tried to TRACE the models in question to see what's happening on an iteration by iteration basis? If it's convergence problems then the questions become: are you using a small timestep? Are you using a controller with hysteresis? etc.</p>
<p> </p>
<p>Jeff</p>
<p> </p>
<div>
<pre>---<br>Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: <a href="tel:(608)%20274-2577" value="+16082742577" target="_blank">(608) 274-2577</a> Fax: <a href="tel:(608)%20278-1475" value="+16082781475" target="_blank">(608) 278-1475</a>
<a href="http://www.tess-inc.com" target="_blank">www.tess-inc.com</a>
E-Mail: <a href="mailto:thornton@tess-inc.com" target="_blank">thornton@tess-inc.com</a>
</pre>
</div>
<p>On 08/01/2017 7:56 am, Javier Vega via TRNSYS-users wrote:</p>
<blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px">
<div dir="ltr"><span style="font-size:12.8px">Hello TRNSYS users,</span>
<div style="font-size:12.8px"> </div>
<div style="font-size:12.8px">I want to use two Type 11f (controller flow diverter) components with the same control signal. One Type 11f redirects solar collector flow </div>
<div style="font-size:12.8px">(Type 553), while the other redirects another circuit's flow to one an Air-Source Heat Pump or a Water Source Heat Pump (Type 941 or Type 927). The events are supposed to happen at the same time.</div>
<div style="font-size:12.8px"> </div>
<div style="font-size:12.8px">Monitoring the results, my DHW temperature falls. When I looked it up, the flow diverters aren't working at the same time. And what it's worse, something happens with the Heat Pumps: I studied the control signals, and they are activated at the same time, but the heat pump's circuit redirects the flow when it isn't supposed to happen and also the Heat Pump that by mistakes recieves flow doesn't heat the water flow. This is what bothers me the most because I set the Heating control signal to a constant 1, so everytime the HP recieves flow it heats.</div>
<div style="font-size:12.8px"> </div>
<div style="font-size:12.8px">I simply don't know how to address this issue, same control signals giving different results, and a Heat Pump that recieves flow by mistake but doesn't heat. I would appreciate some help.</div>
<div style="font-size:12.8px"> </div>
<div style="font-size:12.8px">Kind Regards,<br>Javier Vega</div>
<div style="font-size:12.8px">Universidad de Concepcion</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2017-07-28 15:29 GMT-04:00 Javier Vega <span><<a href="mailto:jvega025@gmail.com" target="_blank">jvega025@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hello TRNSYS users,
<div> </div>
<div>I want to use two Type 11f (controller flow diverter) components with the same control signal. One Type 11f redirects solar collector flow </div>
<div>(Type 553), while the other redirects another circuit's flow to one an Air-Source Heat Pump or a Water Source Heat Pump (Type 941 or Type 927). The events are supposed to happen at the same time.</div>
<div> </div>
<div>Monitoring the results, my DHW temperature falls. When I looked it up, the flow diverters aren't working at the same time. And what it's worse, something happens with the Heat Pumps: I studied the control signals, and they are activated at the same time, but the heat pump's circuit redirects the flow when it isn't supposed to happen and also the Heat Pump that by mistakes recieves flow doesn't heat the water flow. This is what bothers me the most because I set the Heating control signal to a constant 1, so everytime the HP recieves flow it heats.</div>
<div> </div>
<div>I simply don't know how to address this issue, same control signals giving different results, and a Heat Pump that recieves flow by mistake but doesn't heat. I would appreciate some help.</div>
<div> </div>
<div>Kind Regards,<br>Javier Vega</div>
<div>Universidad de Concepcion</div>
</div>
</blockquote>
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</div>
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