<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Francesco and Fred,<br>
Fred is correct that TRNSYS does not have any built in daylighting
computation and that importing available daylight schedules from
Radiance or Daysim would be the best approach. I have used some
other simplified approaches in TRNSYS but neither was for a LEED
model.<br>
<br>
Having managed to navigate the LEED process with about 15 TRNSYS
models over the years, I would contend that the nature of the
building and its systems should drive the decision as to whether to
use TRNSYS for the modeling or whether to opt for another tool.
We've worked on some projects that relied on more conventional
energy efficiency measures and felt that TRNSYS was not the right
tool to be using. We've also worked on LEED projects that had such a
highly sophisticated proposed HVAC system that there was probably
not another tool out there that could have been used. I'd be happy
to talk more with you offline about it but my advice would be to try
and let the project choose the simulation software. <br>
<br>
Best,<br>
David<br>
<br>
<br>
On 5/1/2012 09:27, Fred Betz wrote:
<blockquote
cite="mid:E0609B5984990F4B81F10542BA7E12F322E3D5@AEI-EX2.aeieng.lan"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta name="Generator" content="Microsoft Word 12 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
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
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Francesco,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
don’t believe TRNSYS can model daylighting, but I would
email the TRNSYS list to be sure, <a class="moz-txt-link-abbreviated" href="mailto:trnsys-users@cae.wisc.edu">trnsys-users@cae.wisc.edu</a>.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">What
we do is model the daylighting using Radiance/Daysim, and
then integrate those results into TRNSYS by adjusting the
artificial lighting schedule.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In
general it is difficult to model ASHRAE 90.1 system types in
TRNSYS, but doable. Also, I would discourage you from
modeling more than 20-30 zones as it gets cumbersome in
TRNSYS. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We
typically use TRNSYS to design complex systems, and then
adjust other software such as eQuest to match for compliance
modeling. Sometimes an exceptional calculation is required
when the changes are just too much for eQuest. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Our
experience is that model reviewers don’t understand TRNSYS
as it doesn’t provide “canned” reports like TRACE or eQuest
that are familiar to them.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Good
luck.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Fred<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<table class="MsoNormalTable" style="width:355.5pt" border="0"
cellpadding="0" width="474">
<tbody>
<tr>
<td style="width:125.25pt;padding:.75pt .75pt .75pt .75pt"
valign="top" width="167">
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#660000;text-transform:uppercase">Fred
Betz</span></b><b><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333">
</span></b><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333">PhD.,
LEED AP
<br>
</span><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#333333;text-transform:uppercase">Sustainable
Systems Analyst</span><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333"><o:p></o:p></span></p>
</td>
<td style="width:7.5pt;padding:.75pt .75pt .75pt .75pt"
valign="top" width="10">
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333"> <o:p></o:p></span></p>
</td>
<td style="width:212.25pt;padding:.75pt .75pt .75pt .75pt"
valign="top" width="283">
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#660000">AEI</span></b><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333">
| AFFILIATED ENGINEERS, INC. <br>
5802 Research Park Blvd. | Madison, WI 53719<br>
<br>
</span><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#660000">P:
608.236.1175 | F: 608.238.2614</span><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333"> <br>
</span><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#660000"><a
moz-do-not-send="true"
href="mailto:fbetz@aeieng.com"><span
style="color:#660000;text-decoration:none">fbetz@aeieng.com</span></a>
|
</span><b><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#660000"><a
moz-do-not-send="true"
href="http://www.aeieng.com/"><span
style="color:#660000;text-decoration:none">www.aeieng.com</span></a></span></b><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333">
<o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a class="moz-txt-link-abbreviated" href="mailto:francesco.passerini@inwind.it">francesco.passerini@inwind.it</a>
[<a class="moz-txt-link-freetext" href="mailto:francesco.passerini@inwind.it">mailto:francesco.passerini@inwind.it</a>]
<br>
<b>Sent:</b> Monday, April 30, 2012 11:26 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] TRNSYS: LIGHTING<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span
lang="EN-GB">Hello. </span>
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span
lang="EN-GB">I attended a course about TRNSYS v.17 and
probably my research group will buy it. Our idea is to use
TRNSYS for simulations according to ASHRAE 90.1 annex G
(LEED certification refers to that method).</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span
lang="EN-GB">Can TRNSYS v.17 calculate the internal
illuminance? It would be useful to model lighting control
systems, e.g. if the artificial lighting is switched off
when solar lighting provides a determined level of </span><span
style="font-family:"Arial","sans-serif""
lang="EN-GB">internal illuminance (</span><span lang="EN-GB">lux).</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto"><span
lang="EN-GB">Best Regards</span><o:p></o:p></p>
<div id="_mcePaste">
<p class="MsoNormal"> <o:p></o:p></p>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Bldg-sim mailing list
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</a>
To unsubscribe from this mailing list send a blank message to <a class="moz-txt-link-abbreviated" href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG">BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
***************************
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="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
</body>
</html>