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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Dear Seo,<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'>Well, as far as I know it doesn’t do it directly like
EnergyPlus does for example. I believe (unless it’s changed in v6)
that what you have to do is to carry out a daylighting calculation in Radiance
for each space and then link the results of that to the Apache-Sim calculations
so that the daylight level reductions are accounted for correctly.
Personally I’m not entirely convinced of it’s accuracy, as you have
to make sure the “area of interest” is assigned correctly and very slight
changes in this selection can have profound effects on the daylight factor results.
I prefer using Flucs Pro for doing the daylight calculations and then
making a judgement on a diversity factor to utilise in the simulations.
It makes the simulations much simpler but takes daylight control into account
to some extent. <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'>Another issue to consider, is that if you did this calculation/simulation
with EnergyPlus it uses the climate file data to work out the daylight control savings,
but if you want to use IES then you have to use the CIE overcast sky within
Radiance. There is much debate as to which approach is more accurate and both
have their pro’s and con’s. In that respect it would also be
worth looking at the work of Dr </span><strong><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D;font-weight:normal'>John
Mardaljevic at De Montfort University. His PhD thesis and some
interesting reading is available online here : <a
href="http://www.iesd.dmu.ac.uk/~jm/doku.php?id=academic:climate-based-daylight-modelling">http://www.iesd.dmu.ac.uk/~jm/doku.php?id=academic:climate-based-daylight-modelling</a></span></strong><strong><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;
font-weight:normal'><o:p></o:p></span></strong></p>
<p class=MsoNormal><strong><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D;font-weight:normal'><o:p> </o:p></span></strong></p>
<p class=MsoNormal><strong><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D;font-weight:normal'>Regards<o:p></o:p></span></strong></p>
<p class=MsoNormal><strong><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D;font-weight:normal'>Paul</span></strong><span style='font-size:
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><a name="_MailEndCompose"><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></a></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"'> virtual-sim-bounces@lists.onebuilding.org
[mailto:virtual-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Donghyun
Seo<br>
<b>Sent:</b> 30 December 2009 23:42<br>
<b>To:</b> virtual-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Virtual-sim] Daylight control and electric lighting energy
saving<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Dear All,<br>
<br>
I'm a relatively newbie of IES VE.<br>
I would like to know how IES VE calculates electric lighting energy use with
daylight control simulation.<br>
<br>
<br>
I checked FlucsDL and FlucsPro User Guides but there are general explains about
input.<br>
If you can direct me good references for my question, it would be very helpful
to me.<br>
<br>
Thank you and Happy New Year!<br>
<br>
Seo<br>
<br>
<o:p></o:p></p>
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