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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Here is an alternate method to eQUEST’s daylighting
strategies:<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>From my experience (and training from Marlin Addison), I believe
that eQUEST does not model daylighting with much accuracy. I believe that the
best method to handle daylighting is to run models on independent software
(DAYSIM is free) and insert the results into lighting schedules. My general
practice with lighting schedules is to force 100% of the lights to be on when
the room is occupied and during the same occupied times, create a new schedule
that shows the fraction of lights on from the DAYSIM output. <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'>This method gives the modeler more control and flexibility with
the model and daylighting strategies. Many times we have 3 rows of lights in a
classroom and we typically force the row furthest from the window always on
when occupied so the minimum percentage of lights on during daylighting is 33%
(1/3). <o:p></o:p></span></p>
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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"'> John Aulbach
[mailto:jra_sac@yahoo.com] <br>
<b>Sent:</b> Thursday, January 07, 2010 12:02 PM<br>
<b>To:</b> Matutinovic, Luka; Nick Caton; R B<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] How does eQuest know
initialFootcandlesforDaylighting Calc?<o:p></o:p></span></p>
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<p class=MsoNormal>Luka:<o:p></o:p></p>
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<p class=MsoNormal>That was my hope, but eQuest isn't that smart. As I was so
directed by an "unimpeachable source", there IS no footcandle level
until you set it in the Daylighting mode. eQuest then assumes that this is the
level 100% of the lights emit. Then when you allow the Daylighting mode to run,
eQuest lowers the % lighting based on how much you can gain from the skylights,
side daylighting, etc.<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>Crude but straight forward.<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>Others can add or correct..<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>John
R. Aulbach, PE, CEM<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Senior
Energy Engineer<o:p></o:p></span></p>
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color:#17365D'>
<hr size=2 width="30%" noshade style='color:#17365D' align=left>
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<p class=MsoNormal><b><span style='font-family:"Calibri","sans-serif";
font-variant:small-caps;color:navy'>Partner</span></b><b><span
style='font-family:"Calibri","sans-serif";font-variant:small-caps;color:green'>
</span></b><b><span style='font-family:"Calibri","sans-serif";font-variant:
small-caps;color:#006600'>Energy</span></b><b><span style='font-family:"Calibri","sans-serif";
font-variant:small-caps;color:navy'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>1990
E. Grand Avenue, El Segundo, CA 90245<br>
W: 888-826-1216, X254| D: 310-765-7295 | F: 310-817-2745<o:p></o:p></span></p>
<p class=MsoNormal><a href="http://www.ptrenergy.com/"><span style='font-family:
"Calibri","sans-serif";color:purple'>www.ptrenergy.com</span></a><span
style='font-family:"Calibri","sans-serif";color:#1F497D'> </span><a
href="mailto:%7C%20jaulbach@ptrenergy.com"><span style='font-family:"Calibri","sans-serif"'>|
jaulbach@ptrenergy.com</span></a><span style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><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"'> "Matutinovic, Luka"
<LMatutinovic@halsall.com><br>
<b>To:</b> Nick Caton <ncaton@smithboucher.com>; R B
<slv3sat@gmail.com>; John Aulbach <jra_sac@yahoo.com><br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Sent:</b> Thu, January 7, 2010 6:09:14 AM<br>
<b>Subject:</b> RE: [Equest-users] How does eQuest know initial
FootcandlesforDaylighting Calc?<br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
Nick,<br>
<br>
Does this mean that there is some "baseline" fc that is provided by
the<br>
electrical lighting? That is to say, eQuest will determine how many fc<br>
daylight provides and satisfy the rest with some fraction of the<br>
installed LPD? This implies that there is a relationship between LPD<br>
and fc, is that true and if so what is it or where could I find it?<br>
Thanks,<br>
<br>
Luka Matutinovic, B.A.Sc., LEED(r) AP<br>
Green Building Consultant <br>
<br>
T. 416.644.0649<br>
F. 416.487.9766 <br>
Toll Free 1.888.425.7255<br>
<a href="http://www.halsall.com/" target="_blank">www.halsall.com</a> <br>
<br>
HALSALL ASSOCIATES LTD. <br>
Toronto Richmond Hill Ottawa Sudbury <br>
Burlington Calgary Vancouver Dubai <br>
<br>
'50 Best Workplaces in Canada' <br>
2009 Globe and Mail<br>
P Please consider the environment before printing this e-mail<br>
<br>
<br>
-----Original Message-----<br>
From: Nick Caton [mailto:<a href="mailto:ncaton@smithboucher.com">ncaton@smithboucher.com</a>]
<br>
Sent: Wednesday, December 30, 2009 10:27 AM<br>
To: R B; John Aulbach<br>
Cc: <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
Subject: Re: [Equest-users] How does eQuest know initial<br>
FootcandlesforDaylighting Calc?<br>
<br>
The DOE2 help files suggest, if not directly, that the sensor you are<br>
placing is measuring ONLY "illuminance due to daylight," in isolation
of<br>
any electrical lighting in the project. When you define a
"target"<br>
illumation level (say 30fc) at a specific point/orientation, that sensor<br>
will plot the daylight measured in the same vector against a curve<br>
(specified when you select dimming control options) to determine a<br>
factor to apply to the zone's Lightig Watts/SF.<br>
<br>
To my knowledge, eQuest in no manner whatsoever is attempting to perform<br>
the operations of photometric software (AGI32/Visual/LightPRO/etc).<br>
<br>
~Nick<br>
<br>
NICK CATON, E.I.T.<br>
PROJECT ENGINEER<br>
25501 west valley parkway<br>
olathe ks 66061<br>
direct 913 344.0036<br>
fax 913 345.0617<br>
Check out our new web-site @ <a href="http://www.smithboucher.com/"
target="_blank">www.smithboucher.com</a> <br>
<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a><br>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>]
On Behalf Of R B<br>
Sent: Monday, December 28, 2009 4:44 PM<br>
To: John Aulbach<br>
Cc: <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
Subject: Re: [Equest-users] How does eQuest know initial Footcandles<br>
forDaylighting Calc?<br>
<br>
My guess is that the tool assumes the lighting wattage that you have<br>
gives the amount of footcandles specified. If 50% of this is from<br>
daylight, then remaining is from 50% of the installed lighting<br>
(translating into 50% wattage usage).<br>
-Rohini<br>
<br>
On 12/28/09, John Aulbach <<a href="mailto:jra_sac@yahoo.com">jra_sac@yahoo.com</a>>
wrote:<br>
> LIke the Phantom of the Opera.."A mystery never fully
explained.."<br>
><br>
> I have performed Daylighting savings EEMs in eQuest, where one places<br>
a<br>
> sensor in the space, one deliniates a minimum footcandle requirement,<br>
and<br>
> runs a Parametric run to determine how much lighting energy may be<br>
saved.<br>
><br>
> What is NOT clear to me is how eQuest determines what the inital<br>
footcandle<br>
> level is. It obviously knows the lighting fixture height (Ceilling or<br>
> syspended) and the geometry of existing windows, etc. But I cannot<br>
find<br>
> where the information lies that says "eQuest assumes so many<br>
lumens/watt of<br>
> certain lighting."<br>
><br>
> Can anyone "ILLUMINATE" me, please?<br>
><br>
> Hope all had a great Christmas.<br>
><br>
> John Aulbach<br>
><br>
><br>
><br>
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