<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body ><div>Bill, </div><div><br></div><div>The method that Nathan describes is likely known by the IES users on your team, but I focused on the possibility that you would want to feed a schedule into eQuest as was the case in the article that I referenced. </div><div><br></div><div>Would be interested in how your issue progresses and what course is chosen of the many. </div><div><br></div><div>Kent</div><div><br></div><div><br></div><div style="font-size:75%">Sent via my mobile</div><br><br><br>-------- Original message --------<br>From: Nathan Kegel <nathan.kegel@iesve.com> <br>Date: 08/14/2013 4:42 PM (GMT-06:00) <br>To: Kent Beason <kbeason@estesmcclure.com>,"'Sami, Vikram'" <vikram.sami@zgf.com>,"'Bishop, Bill'" <bbishop@pathfinder-ea.com>,'David Griffin' <dgriffin@etcgrp.com>,"'Busman, Michael R'" <MBusman@chevron.com>,equest-users@lists.onebuilding.org <br>Subject: RE: [Equest-users] Input function with daylight factors for accurate daylighting <br> <br><br>
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<p class="MsoNormal"><span style="color:#1F497D">Felt like a response was warranted to clarify how this works.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">There is no need to copy/paste from Vista or generate a separate schedule in IES VE. IES have a GUI for Radiance which allows the user to place a sensor in a zone, create a control algorithm for that sensor
(more accurately, create a means for how the sensor should either dim or “step” lights on/off), run an annual daylight simulation using Radiance (for which we have an algorithm that looks at various sky conditions throughout the year and relates them to the
sky conditions in the climate file), then, by means of simply ticking a box, feed the results of that annual daylight simulation directly into the thermal simulation.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">It is true that you can export the actual hourly illuminance levels from Vista – but (again) there is no need to do that in order to use the results in the thermal simulation within the VE. In other words –
it’s not very labor intensive to actually incorporate an annual Radiance simulation into the thermal simulation.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">That’s the short version. If anyone is interested in learning more (as I don’t wish to turn this into an IES thread), I’m sure you’ll let me know.
</span><span style="font-family:Wingdings;color:#1F497D">J</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Kent Beason<br>
<b>Sent:</b> Wednesday, August 14, 2013 4:20 PM<br>
<b>To:</b> 'Sami, Vikram'; 'Bishop, Bill'; 'David Griffin'; 'Busman, Michael R'; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Input function with daylight factors for accurate daylighting<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">The following article is a good read since it is related:
<a href="http://www.nrel.gov/sustainable_nrel/pdfs/47522.pdf">http://www.nrel.gov/sustainable_nrel/pdfs/47522.pdf</a>. Some background info is given with regard to the shortfalls of DOE2 daylighting vs backward raytracing aka Radiance-based tools also, so
I thought I'd post it for reference. It also gives a good play-by-play in context of the NREL RSF case study, which incorporated the use of SPOT, an Excel-based tool which runs Radiance in the background.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">That said, IESVE currently would fit better in your process obviously since it's already being used in the project as you say. Similarly, as is described for SPOT in the article, exporting a dimming
schedule from IES is simple from its Vista module once the simulation is done, and then imported into eQuest. Apparently lots of other schedules were created during the RSF design with software tools better suited for various analyses but the central energy
model was crunched by eQuest I believe using those imported schedules. SPOT may still be of use as it is supposed to find the optimal sensor placement, but any sensor placement will need to be consistent with actual lighting layout/circuits anyways. Anyone
familiar with SPOT might be able to contribute.<b><o:p></o:p></b></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:black">Kent Beason<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:black">-------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:black">office - 903 581 2291<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Sami, Vikram [<a href="mailto:vikram.sami@zgf.com">mailto:vikram.sami@zgf.com</a>]
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<b>Sent:</b> Tuesday, August 13, 2013 7:26 PM<br>
<b>To:</b> Bishop, Bill; David Griffin; 'Busman, Michael R'; <a href="mailto:equest-users@lists.onebuilding.org">
equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Input function with daylight factors for accurate daylighting<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Arial Narrow","sans-serif";color:#1F497D">Couple of suggestions:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Arial Narrow","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span lang="EN-US" style="font-family:"Arial Narrow","sans-serif";color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-US" style="font-family:"Arial Narrow","sans-serif";color:#1F497D">Run the model in IES – I think they have a better daylight algorithm.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span lang="EN-US" style="font-family:"Arial Narrow","sans-serif";color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-US" style="font-family:"Arial Narrow","sans-serif";color:#1F497D">Use Daysim - you can get hourly light level readings from Daysim that you can postprocess to create a lighting schedule in eQUEST. This is probably
fairly labor intensive. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Arial Narrow","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:12.0pt"><b><span style="font-size:9.0pt;font-family:"Futura LT Book";color:#E33B45">Vikram Sam</span></b></p></td></tr></tbody></table></div></div></body>