<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Christopher,<div><br></div><div>TRNSYS will convert your timestep into the closest 1/N timestep where N is an integer and the timestep is in hours. In that way, there is always a constant number of timesteps per hour - making life a lot easier for people coding their own models. The largest value of N is currently coded to 36000; for a minimum timestep of 0.1 seconds.</div><div><br></div><div>Jeff <br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Feb 11, 2022, at 9:29 AM, Graf, Christopher via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Frutiger LT Com 45 Light";
panose-1:2 11 3 3 3 5 4 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.E-MailFormatvorlage17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal"><span lang="EN-GB">Dear Trnsys users,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">as part of my research I simulated a building with domestic hot water (DHW) and space heating system for one year. My current time step is 3min (0.05hr). I’m thinking about lowering the time step to improve the resolution
of my DHW tapping profiles and the simulation results. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I wondered if I can basically take any time step? For example if I choose to take 5s (0.13</span><!--[if gte msEquation 12]><m:oMath><m:acc><m:accPr><m:chr m:val="̅"/><span style='font-family:"Cambria Math",serif'><m:ctrlPr></m:ctrlPr></span></m:accPr><m:e><span lang=EN-GB><m:r><m:rPr><m:nor/></m:rPr>8</m:r></span></m:e></m:acc></m:oMath><![endif]--><!--[if !msEquation]--><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;position:relative;top:2.5pt;mso-text-raise:-2.5pt;mso-fareast-language:EN-US"><img width="7" height="17" style="width:.0729in;height:.177in" id="_x0000_i1025" src="cid:image003.png@01D81F39.85FA7410"></span><!--[endif]--><span lang="EN-GB">
or rounded 0.13888889) it technically adds up to 8760 hr, but in reality the time steps needs to rounded after a certain number of decimals, true? Will the time step be rounded in TRNSYS? And if yes, h</span><span lang="EN-GB">ow does TRNSYS cope with a time
step which does not exactly add up to 8760 hr? Does it make a difference whether I chose to “min” or “s” instead of “hr” during the configuration of the time step in the settings menu?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Therefore, would it be best or is it necessary to choose a time steps which is discrete and adds up to 8760 hr?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Thank you for your answers!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Best Regards, <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Christopher Graf<o:p></o:p></span></p>
<div style="mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm">
<p class="MsoNormal" style="border:none;padding:0cm"><b><span style="color:#7F7F7F;mso-fareast-language:DE"><o:p> </o:p></span></b></p>
</div>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE"><br>
Christopher Graf, M.Sc.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE">Scientific Associate, PhD-Candidate<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE">Thermal Energy System Departement, Energy Economics and Process Integration Division<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE">Fraunhofer Institute for Energy Economics and Energy System Technology<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE">Gottschalkstr. 28a | 34127 Kassel | Germany (Visiting adress)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE">Königstor 59 | 34119 Kassel |Germany (Postal adress)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE"><a href="mailto:christopher.graf@iee.fraunhofer.de"><span lang="EN-GB" style="color:#7F7F7F">christopher.graf@iee.fraunhofer.de</span></a></span><span style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE">
</span><span lang="EN-GB" style="font-size:9.0pt;font-family:"Frutiger LT Com 45 Light",sans-serif;color:#7F7F7F;mso-fareast-language:DE">| Phone +49 561 804-2692</span><span lang="EN-GB" style="font-size:10.0pt;color:#7F7F7F;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<span>_______________________________________________</span><br><span>TRNSYS-users mailing list</span><br><span>TRNSYS-users@lists.onebuilding.org</span><br><span>http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</span><br></div></blockquote></div></body></html>