<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" id="geom_inter_1588975787257_52_3">
Dear David,</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" id="geom_inter_1588975787257_52_3">
Thank you for your reply and help. It makes sense now. I will try your suggestion. </div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" id="geom_inter_1588975787257_52_3">
<br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" id="geom_inter_1588975787257_52_3">
Thanks again and best regards,</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" id="geom_inter_1588975787257_52_3">
Mariam</div>
<div>
<div id="appendonsend"></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> David BRADLEY <d.bradley@tess-inc.com><br>
<b>Sent:</b> Wednesday, May 6, 2020 5:35 PM<br>
<b>To:</b> TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org><br>
<b>Cc:</b> Mariam Elnour <mariam.elnour@outlook.com><br>
<b>Subject:</b> Re: [TRNSYS-users] Building simulation - Zones temperature dynamics</font>
<div> </div>
</div>
<div>
<p style="margin-top: 0px; margin-bottom: 0px;">Mariam,</p>
<p style="margin-top: 0px; margin-bottom: 0px;"> The wall transfer function coefficients are computed with a certain time base. When you run a simulation in which your time step is a lot smaller than the wall time base you start to see the times at which the
wall transfer function coefficients are updated, which produces this step-like plot. Depending on the construction of the walls in your building, you can probably reduce the wall timebase and get rid of the steps. The time base is set in TRNBuild's output
manager. I'd suggest using a 0.25h time base.</p>
<p style="margin-top: 0px; margin-bottom: 0px;">kind regards,</p>
<p style="margin-top: 0px; margin-bottom: 0px;"> David</p>
<p style="margin-top: 0px; margin-bottom: 0px;"> <br>
</p>
<p style="margin-top: 0px; margin-bottom: 0px;"><br>
</p>
<div class="x_moz-cite-prefix">On 05/06/2020 04:42, Mariam Elnour via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite">
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Dear colleagues,</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I am simulating a 3-floor building to observe the change in the zones' temperature. In reference to the plots below, I noticed that the
<span style="font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important">
temperature transition has a stair-like behavior. The simulation step is 0.015 hr (1 min). I would appreciate your help with this as I don't seem to figure what is causing it? </span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important"><br>
</span></div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<img size="45680" tabindex="-1" class="" width="589.9665665153743" height="303.58049342105267" style="width:589.967px; height:303.58px" data-outlook-trace="F:2|T:2" src="cid:part1.D8F5B553.17FD0868@tess-inc.com"><br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
</div>
<div style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<div style="margin:0px; font-size:12pt; font-family:Calibri,Helvetica,sans-serif">
<span style="margin:0px; background-color:rgb(255,255,255); display:inline!important"><br>
Regards,</span></div>
<div style="margin:0px; font-size:12pt; font-family:Calibri,Helvetica,sans-serif">
<span style="margin:0px; background-color:rgb(255,255,255); display:inline!important">Mariam</span></div>
<br>
</div>
<br>
<fieldset class="x_mimeAttachmentHeader"></fieldset>
<pre class="x_moz-quote-pre">_______________________________________________
TRNSYS-users mailing list
<a class="x_moz-txt-link-abbreviated" href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a>
<a class="x_moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a>
</pre>
</blockquote>
<pre class="x_moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="x_moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="x_moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="x_moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
</div>
</div>
</body>
</html>