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<p class="MsoNormal"><span style="color:#1F497D">Thanks Mike Andelman, John Aulbach, David Griffin, Umesh Atre and Liam Buckley for your helpful replies. For the benefit of the List, here’s what I found out:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">DOE-2 input functions are not (currently) supported in eQUEST.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">DOE-2 and eQUEST use the split-flux algorithm to model internally-reflected daylight. The eQUEST daylight calculation works best when the illuminance at a reference point is due to light directly from
the windows (not reflected from the interior).<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Available daylight tends to be overestimated when the reference point is near the back of the room (depth more than three times floor-to-ceiling height).<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">The impact of split-<a href="http://www.newegg.com/Product/Product.aspx?Item=9SIA0420P34606&nm_mc=KNC-GoogleMKP&cm_mmc=KNC-GoogleMKP-_-pla-_-Collectibles-_-9SIA0420P34606">flux</a> method inaccuracies
tends to be minor relative to total simulated building energy use.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Contact Mike Busman if you have
<a href="http://rcd.typepad.com/personal/39_2Dfiat_2Dx19.jpg">Fiat X1/9</a> questions or want your photo taken with a life-sized
<a href="http://xfinity.comcast.net/blogs/tv/files/2012/10/snl-big-bird.jpg">Big Bird</a>.<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">Some reference material:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">An, J. and Mason, S., “<a href="http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=5&ved=0CEQQFjAE&url=http%3A%2F%2Fwww.ibpsa.us%2Fpub%2Fsimbuild2010%2Fpapers%2FSB10-DOC-TS06A-02-An.pdf&ei=fvsIUsajJffi4APkgYHoAQ&usg=AFQjCNEuoAY8TAF6h0xBNfe3nM1Ixg0CeQ&sig2=sE8jHhF7RdYtrduN">Integrating
Advanced Daylight Analysis Into Building Energy Analysis</a>” Fourth National Conference of IBPSA-USA, 2010.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Kota, S. and Haberl, J., “<a href="http://www.google.com/url?q=http://repository.tamu.edu/bitstream/handle/1969.1/90845/ESL-IC-09-11-07.pdf%3Fsequence%3D1&ei=GAMJUoOGJ5Dk4AOWi4D4Dg&sa=X&oi=unauthorizedredirect&ct=targetlink&ust=1376324128641243&usg=AFQjCNGiI8d6ArLsnb4BkuLhah7yBN5Prg">Historical
Survey of Daylighting Calculations Methods and Their Use in Energy Performance Simulations</a>.” Proceedings of the Ninth International Conference for Enhanced Building Operations, Austin, Texas, November 17 - 19, 2009.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Koti, R. and Addison, M., “<a href="http://www.researchgate.net/publication/229061747_AN_ASSESSMENT_OF_AIDING_DOE-2'S_SIMPLIFIED_DAYLIGHTING_METHOD_WITH_DAYSIM'S_DAYLIGHT_ILLUMINANCES/file/79e414ffee34037ee6.pdf?ev=pub_ext_doc_dl&docViewer=true">An
Assessment of Aiding DOE-2’s Simplified Daylighting Method with DAYSIM’s Daylight Illuminances</a>.” Proceedings of the Solar 2007 Conference in Cleveland, 2007.<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">~Bill<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 style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span 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>Bishop, Bill<br>
<b>Sent:</b> Thursday, August 08, 2013 1:25 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [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">I am modeling a building with many clerestory windows of various orientations in a complex roof geometry. I would like to accurately model the daylighting savings in eQUEST. Has anyone had luck creating an input function that uses daylight
illuminance factors, <a href="http://simulationresearch.lbl.gov/dirpubs/complex_dayltg.pdf">
as described by Steve Baker</a> back when Bush Sr. was president and <a href="http://www.youtube.com/watch?v=9EcjWd-O4jI">
this song</a> was a Top 10 hit? “Limitations of the Daylighting Calculation” and an “Example of Using Measured Daylight Factors” using an input function are described in the DOE-2 help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Bill<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium","sans-serif";color:black">William Bishop, PE, BEMP, BEAP, LEED AP
</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium","sans-serif";color:#006600">|</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium","sans-serif";color:black"> Pathfinder Engineers & Architects LLP<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:black">Senior Energy Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:5.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">134 South Fitzhugh Street</span><span style="font-size:9.0pt;font-family:"Times New Roman","serif"">
</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">Rochester, NY 14608<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">T: (585) 325-6004
<span style="color:black">Ext. 114</span></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">
</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">F: (585) 325-6005<span style="color:black"><o:p></o:p></span></span></p>
<p class="MsoNormal"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">bbishop@pathfinder-ea.com</span></a><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:black">
</span><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">www.pathfinder-ea.com</span></a><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:Webdings;color:green">P</span><span style="font-size:14.0pt;font-family:"Times New Roman","serif";color:green">
</span><span style="font-size:7.5pt;font-family:"Times New Roman","serif";color:green">Sustainability – the forest AND the trees.</span><span style="font-size:18.0pt;font-family:Webdings;color:green">
</span><span style="font-size:14.0pt;font-family:Webdings;color:green">P</span><span style="font-size:14.0pt;color:green"> </span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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