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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>5% is a really tight number we have been
forced to work with on come retro commissioning projects in the past, with 10%
being the norm on an annual and monthly basis for overall building energy use. Anything
stricter than those numbers is unrealistic (again for the overall building).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=navy face="Times New Roman"><span
style='font-size:10.0pt;color:navy'>Jorge E. Torres Coto </span></font><font
size=1 color=black><span style='font-size:1.0pt;color:black;border:none windowtext 1.0pt;
padding:0in;background:black;layout-grid-mode:line'> </span></font><font
size=2 color=navy><span style='font-size:10.0pt;color:navy'><img width=39
height=39 id="_x0000_i1027" src="cid:image002.jpg@01CC0641.E276F730"><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=2
color=navy face="Times New Roman"><span style='font-size:10.0pt;color:navy'>4830
Viewridge Ave.</span></font></st1:address></st1:Street><font size=2
color=navy><span style='font-size:10.0pt;color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Times New Roman"><span
lang=ES-MX style='font-size:10.0pt;color:navy'>San Diego, CA 92123<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Times New Roman"><span
lang=ES-MX style='font-size:10.0pt;color:navy'>p 858.751.0933<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Times New Roman"><span
lang=ES-MX style='font-size:10.0pt;color:navy'>f 858.751.0937<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Times New Roman"><span
style='font-size:10.0pt;color:navy'>c 858.688.6088<o:p></o:p></span></font></p>
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style='font-size:12.0pt;color:navy'><img width=181 height=159 id="_x0000_i1028"
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<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Nick Caton<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, April 29, 2011 7:42
AM<br>
<b><span style='font-weight:bold'>To:</span></b> James V Dirkes II, PE; Karen
Walkerman; Carol Gardner<br>
<b><span style='font-weight:bold'>Cc:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] eQuest -
Model verification</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#365F91'>I know I have less
experience calibrating models than some other respondents, but I’ll share
my perspectives as well:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>It is easy to adjust
occupancy schedules / lighting loads in eQuest, but it requires the end-user
knows the program. If the end-user is inexperienced with eQuest or any
other simulation program, then there is no “easily modifiable”
model you can provide.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'><o:p> </o:p></span></font></p>
<p class=msolistparagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><font
size=2 color="#365f91" face=Calibri><span lang=EN-CA style='font-size:11.0pt;
color:#365F91'><span style='mso-list:Ignore'>1)<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font color="#365f91"><span
lang=EN-CA style='color:#365F91'>Even if I manage to put in daily occupant and
fan schedules based on actual use, will the model be accurate enough to take me
within 1%?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'>With regard to
historical modeling, showing any deadband of accuracy to known
costs/consumptions is *technically* possible given enough information and
time… That said, falling within 1% of any holistic measure, even on
an annual basis, before “refining the unknowns” would probably
happen only by very lucky/happy coincidence. It’s fair to say that
in a relative sense, some buildings operate much more regularly and predictably
than others, and for these cases you or a client might reasonably expect a
tighter deadband. Asking what is “accurate enough” is like
asking “what’s reasonable,” and the answer is that it depends
on what info/time you have. There are always “unknowable” variables
that can play a big role in your end-results (example: what is the actual
leakiness of a 35 year old envelope?).<o:p></o:p></span></font></p>
<p class=msolistparagraph><font size=2 color="#365f91" face=Calibri><span
lang=EN-CA style='font-size:11.0pt;color:#365F91'><o:p> </o:p></span></font></p>
<p class=msolistparagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><font
size=2 color="#365f91" face=Calibri><span lang=EN-CA style='font-size:11.0pt;
color:#365F91'><span style='mso-list:Ignore'>2)<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font color="#365f91"><span
lang=EN-CA style='color:#365F91'>We have been asked to remove plug loads (both
for consumption purposes and cooling loads). Will this be too big of an assumption
to get any accuracy out of the model in the future?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'>Depends on your
building, but for most buildings plug loads are a significant fraction of
consumption/internal loads. <o:p></o:p></span></font></p>
<p class=msolistparagraph><font size=2 color="#365f91" face=Calibri><span
lang=EN-CA style='font-size:11.0pt;color:#365F91'><o:p> </o:p></span></font></p>
<p class=msolistparagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><font
size=2 color="#365f91" face=Calibri><span lang=EN-CA style='font-size:11.0pt;
color:#365F91'><span style='mso-list:Ignore'>3)<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font color="#365f91"><span
lang=EN-CA style='color:#365F91'>How do I modify the weather input file?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'>I saved the attached
email from David Reddy for the next time I need to tackle “actual
weather.” My attempts thus far haven’t been terribly
successful, so I have no “go-to” procedures to share just
yet. I have heard reference from those who appear in the know to
macro/VBA-heavy excel spreadsheets which can automate the workflow to one
extent or another, but I’ve not yet seen one with my own eyes. I
have yet to hear of any program that can “easily” incorporate
recently recorded weather data. <o:p></o:p></span></font></p>
<p class=msolistparagraph><font size=2 color="#365f91" face=Calibri><span
lang=EN-CA style='font-size:11.0pt;color:#365F91'><o:p> </o:p></span></font></p>
<p class=msolistparagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><font
size=2 color="#365f91" face=Calibri><span lang=EN-CA style='font-size:11.0pt;
color:#365F91'><span style='mso-list:Ignore'>4)<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font color="#365f91"><span
lang=EN-CA style='color:#365F91'> Are there any other ideas I’m
missing that will help us validate a model as an absolute measure of actual
building energy consumption?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#365f91" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#365F91'>Generally: the
only “absolute measure of actual building consumption” will be the
utility bills. Something about the 1% number tells me you or your client
might be trying to hammer a nail with a screwdriver… Energy models are
great for looking to the past to make decisions that acknowledge the unknowns
of the future, but if the real goal is to know the actual energy usage on an
hourly basis – why not set up some sub-meters and track them? While
meters/bills measure energy usage and energy models can use that information to
make predictions, models don’t determine bills – it doesn’t
work in reverse!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>PS: For all
the work you might put into calibrating a model with historical weather and
other known data, keep perspective that your model will only ever be that
accurate for behaviour in that year. The moment anyone wants to use
this model predictively (for the future), you probably should swap back to TMY
weather data and embrace the inherent unknowns.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>~Nick<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><img width=119
height=37 id="Picture_x005f_x0020_1" src="cid:image004.jpg@01CC0641.E276F730"
alt="cid:489575314@22072009-0ABB"></span></font><b><font size=2 color="#2d4d5e"
face="Stylus BT"><span style='font-size:11.0pt;font-family:"Stylus BT";
color:#2D4D5E;font-weight:bold'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color="#2d4d5e" face="Stylus BT"><span
style='font-size:11.0pt;font-family:"Stylus BT";color:#2D4D5E;font-weight:bold'><o:p> </o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color="#2d4d5e" face="Stylus BT"><span
style='font-size:11.0pt;font-family:"Stylus BT";color:#2D4D5E;font-weight:bold'>NICK
CATON, E.I.T.</span></font></b><b><font color="#2d4d5e" face="Stylus BT"><span
style='font-family:"Stylus BT";color:#2D4D5E;font-weight:bold'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=1 color="#cc9900" face=Calibri><span
style='font-size:7.5pt;font-family:Calibri;color:#CC9900'>PROJECT ENGINEER<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>Smith & Boucher
Engineers</span></font><font size=1 color="#cc9900"><span style='font-size:
7.5pt;color:#CC9900'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>25501 west valley
parkway<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
color="#2d4d5e" face=Calibri><span style='font-size:10.0pt;font-family:Calibri;
color:#2D4D5E'>olathe</span></font></st1:place></st1:City><font size=2
color="#2d4d5e" face=Calibri><span style='font-size:10.0pt;font-family:Calibri;
color:#2D4D5E'> ks 66061<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>direct 913 344.0036<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#2d4d5e" face=Calibri><span
style='font-size:10.0pt;font-family:Calibri;color:#2D4D5E'>fax 913 345.0617<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><a
href="www.smithboucher.com" title="blocked::www.smithboucher.com"><font size=2><span
style='font-size:10.0pt'>www.smithboucher.com</span></font></a></span></font><u><font
size=2 color=blue face=Calibri><span style='font-size:10.0pt;font-family:Calibri;
color:blue'> </span></font></u><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>James V Dirkes II, PE<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 28, 2011
7:12 PM<br>
<b><span style='font-weight:bold'>To:</span></b> 'Karen Walkerman'; 'Carol
Gardner'<br>
<b><span style='font-weight:bold'>Cc:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] eQuest -
Model verification<o:p></o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Weighing in late on
this….<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>If I get >80%
R-squared correlation, I think I’m doing well! <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>There are so many
unknowns, including the normal situation that the client doesn’t know
their own operating schedules, occupancy patterns, or maintenance / calibration
procedures….<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal align=center style='text-align:center'><b><font size=4
color="#1f497d" face=Calibri><span style='font-size:13.5pt;font-family:Calibri;
color:#1F497D;font-weight:bold'>The Building Performance Team<br>
</span></font></b><b><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D;font-weight:bold'>James
V. Dirkes II, P.E., LEED AP, BEMP<br>
</span></font></b><st1:Street w:st="on"><st1:address w:st="on"><font size=2
color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:Calibri;
color:#1F497D'>1631 Acacia Drive NW</span></font></st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on"><font size=2 color="#1f497d"
face=Calibri><span style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Grand
Rapids</span></font></st1:City><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>, <st1:State w:st="on">MI</st1:State>
<st1:PostalCode w:st="on">49504</st1:PostalCode></span></font></st1:place><br>
<font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;
font-family:Calibri;color:#1F497D'>616 450 8653<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-left:.5in'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Karen Walkerman<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 28, 2011
3:31 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Carol Gardner<br>
<b><span style='font-weight:bold'>Cc:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] eQuest -
Model verification<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Also, a model that is calibrated to actual building
use and weather can help to highlight building operation issues. I have
had models which were off from actual operating energy use that I was able to
determine how the building was operating inefficiently.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>In one case, I created a model of an existing
building. For this model, I made an actual count of lighting fixtures and
computers. For most of the year, there were few other electrical loads.
I based on their occupancy and use schedules, I was not quite able to
calibrate the electrical energy use. When I met with the client, I
informed him that my model showed somewhat lower electrical use, equivalent to
1/3 of the computers remaining on 24-hours per day. As it turned out,
about 1/3 of the employees DID leave their computers on at all times so that
they could log in remotely.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>... I guess what I'm saying is that maybe the goal is
not to get the model within 1% of the building energy use, but get the building
within 1% of the model.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>--<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Karen<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On Thu, Apr 28, 2011 at 3:20 PM, Carol Gardner <<a
href="mailto:cmg750@gmail.com">cmg750@gmail.com</a>> wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Bill summed it up really well, Katherine. Sometimes a
client will think a calibrated model must match the real building by an
unrealistically high number, like 1%. I really can't imagine an instance when
that would be desirable. It certainly would be costly to achieve. <o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Usually the plan is to use the calibrated model as a
tool to examine various energy saving measures/opportunities that the client
may be interested in implementing. It is important to remember, in this case
that you are looking at the usage between the calibrated model and the ECM
model, so the 1% deviation is consistent in both and not a worry.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Carol<o:p></o:p></span></font></p>
<div>
<div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On Thu, Apr 28, 2011 at 12:03 PM, Bishop, Bill <<a
href="mailto:wbishop@pathfinder-ea.com" target="_blank">wbishop@pathfinder-ea.com</a>>
wrote:<o:p></o:p></span></font></p>
</div>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;
margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'>Katherine,</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'>The questions I would have for you (or
your client) are:</span></font><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 color="#1f497d" face=Symbol><span
style='font-size:12.0pt;font-family:Symbol;color:#1F497D'>·</span></font><font
size=1 color="#1f497d"><span style='font-size:7.0pt;color:#1F497D'>
</span></font><font color="#1f497d"><span style='color:#1F497D'>Is this an
existing building, or something in the design phase?</span></font><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 color="#1f497d" face=Symbol><span
style='font-size:12.0pt;font-family:Symbol;color:#1F497D'>·</span></font><font
size=1 color="#1f497d"><span style='font-size:7.0pt;color:#1F497D'>
</span></font><font color="#1f497d"><span style='color:#1F497D'>What is the
model going to be used for?</span></font><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 color="#1f497d" face=Symbol><span
style='font-size:12.0pt;font-family:Symbol;color:#1F497D'>·</span></font><font
size=1 color="#1f497d"><span style='font-size:7.0pt;color:#1F497D'>
</span></font><font color="#1f497d"><span style='color:#1F497D'>Is there
something magical about the 1% number?</span></font><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 color="#1f497d" face=Symbol><span
style='font-size:12.0pt;font-family:Symbol;color:#1F497D'>·</span></font><font
size=1 color="#1f497d"><span style='font-size:7.0pt;color:#1F497D'>
</span></font><font color="#1f497d"><span style='color:#1F497D'>1% of what?
Annual electrical consumption? Annual gas consumption? Both? Monthly
electric/gas consumption? Monthly/annual electrical demand?</span></font><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 color="#1f497d" face=Symbol><span
style='font-size:12.0pt;font-family:Symbol;color:#1F497D'>·</span></font><font
size=1 color="#1f497d"><span style='font-size:7.0pt;color:#1F497D'>
</span></font><font color="#1f497d"><span style='color:#1F497D'>Why remove the
plug loads? Even if everything else is modeled perfectly, plug loads are
typically 10% or more of annual electrical consumption but can be all over the
place.</span></font><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 color="#1f497d" face=Symbol><span
style='font-size:12.0pt;font-family:Symbol;color:#1F497D'>·</span></font><font
size=1 color="#1f497d"><span style='font-size:7.0pt;color:#1F497D'>
</span></font><font color="#1f497d"><span style='color:#1F497D'>“Easily
adjusted” by whom? Does your client want you to hand them a model and let
them make all subsequent adjustments?</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'>Even if you are an expert energy
modeler, and there is monitored energy data available for the building down to
the individual electrical panels or broken out by end use (lighting, plug
loads, individual HVAC units etc.) you will be hard-pressed to get to within 1%
on a month-by-month basis. Even 5% month-by-month is difficult. Sure, you can
tweak to your heart’s content to get a model to match annual electric
consumption within 1% based on prior year’s utility bills but to maintain
a calibrated model to that tolerance after that would require a lot of work.</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'>I suggest searching the bldg-sim and
equest-users archives for information about weather files.</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'>Oh, one more question – how much
money does your client have?</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'>Regards,</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'>Bill</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 color="#1f497d" face="Times New Roman"><span
style='font-size:12.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><st1:place w:st="on"><st1:City w:st="on"><b><font size=2
color=black face="Times New Roman"><span style='font-size:10.0pt;color:black;
font-weight:bold'>William</span></font></b></st1:City><b><font size=2
color=black><span style='font-size:10.0pt;color:black;font-weight:bold'> <st1:State
w:st="on">Bishop</st1:State>, <st1:State w:st="on">PE</st1:State></span></font></b></st1:place><b><font
size=2 color=black><span style='font-size:10.0pt;color:black;font-weight:bold'>,
BEMP, LEED<sup>®</sup> AP </span></font></b><b><font size=2 color="#006600"><span
style='font-size:10.0pt;color:#006600;font-weight:bold'>|</span></font></b><b><font
size=2 color=black><span style='font-size:10.0pt;color:black;font-weight:bold'>
Pathfinder Engineers & Architects LLP</span></font></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=1 color=black face="Times New Roman"><span
style='font-size:9.0pt;color:black'>Mechanical Engineer</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=1 color=black face="Times New Roman"><span
style='font-size:5.0pt;color:black'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><b><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-weight:bold'>Error! Filename not specified.</span></font></b><font
size=1 color="#1f497d"><span style='font-size:9.0pt;color:#1F497D'>134 <st1:address
w:st="on"><st1:Street w:st="on">South Fitzhugh Street</st1:Street>
<st1:City w:st="on">Rochester</st1:City>, <st1:State w:st="on">NY</st1:State> <st1:PostalCode
w:st="on">14608</st1:PostalCode></st1:address><br>
T: <a href="tel:%28585%29%20325-6004" target="_blank">(585) 325-6004</a> </span></font><font
size=1 color=black><span style='font-size:9.0pt;color:black'>Ext. 114</span></font><font
color="#1f497d"><span style='color:#1F497D'>
</span></font><font size=1 color="#1f497d"><span style='font-size:9.0pt;
color:#1F497D'>F: <a href="tel:%28585%29%20325-6005" target="_blank">(585)
325-6005</a></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=1 color=black face="Times New Roman"><span
style='font-size:9.0pt;color:black'><a href="mailto:wbishop@pathfinder-ea.com"
target="_blank">wbishop@pathfinder-ea.com</a>
<a href="http://www.pathfinder-ea.com/" target="_blank">www.pathfinder-ea.com</a></span></font><o:p></o:p></p>
</div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=5 color=green face=Webdings><span
style='font-size:18.0pt;font-family:Webdings;color:green'>P</span></font><font
color=green><span style='color:green'> </span></font><font size=1
color=green><span style='font-size:7.5pt;color:green'>Sustainability –
the forest AND the trees.</span></font><font size=5 color=green face=Webdings><span
style='font-size:18.0pt;font-family:Webdings;color:green'> P</span></font><font
size=5 color=green><span style='font-size:18.0pt;color:green'> </span></font><font
size=5 color=green face=Webdings><span style='font-size:18.0pt;font-family:
Webdings;color:green'> </span></font><o:p></o:p></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><b><font size=2 face="Times New Roman"><span
style='font-size:10.0pt;font-weight:bold'>From:</span></font></b><font size=2><span
style='font-size:10.0pt'> <a
href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>]
<b><span style='font-weight:bold'>On Behalf Of </span></b>Katherine
Louman-Gardiner<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 28, 2011
1:49 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <a
href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] eQuest - Model
verification</span></font><o:p></o:p></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>Hi All,</span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>Our client would like us to produce an eQuest model
that</span><o:p></o:p></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
lang=EN-CA style='font-size:12.0pt'>a)</span></font><font size=1><span
lang=EN-CA style='font-size:7.0pt'> </span></font><span
lang=EN-CA>Can be easily adjusted to include current and recently recorded
weather data</span><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
lang=EN-CA style='font-size:12.0pt'>b)</span></font><font size=1><span
lang=EN-CA style='font-size:7.0pt'> </span></font><span
lang=EN-CA>Can be easily adjusted to reflect space occupancies and lighting
loads</span><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
lang=EN-CA style='font-size:12.0pt'>c)</span></font><font size=1><span
lang=EN-CA style='font-size:7.0pt'> </span></font><span
lang=EN-CA>Will reflect the actual building energy usage to within 1%</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>Do any of you have experience trying to validate
models like this? </span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>My concern is that models are approximations, and will
not account for small changes in occupancy, outdoor weather, etc. </span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>I guess my questions are these:</span><o:p></o:p></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
lang=EN-CA style='font-size:12.0pt'>1)</span></font><font size=1><span
lang=EN-CA style='font-size:7.0pt'> </span></font><span
lang=EN-CA>Even if I manage to put in daily occupant and fan schedules based on
actual use, will the model be accurate enough to take me within 1%?</span><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
lang=EN-CA style='font-size:12.0pt'>2)</span></font><font size=1><span
lang=EN-CA style='font-size:7.0pt'> </span></font><span
lang=EN-CA>We have been asked to remove plug loads (both for consumption
purposes and cooling loads). Will this be too big of an assumption to get
any accuracy out of the model in the future?</span><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
lang=EN-CA style='font-size:12.0pt'>3)</span></font><font size=1><span
lang=EN-CA style='font-size:7.0pt'> </span></font><span
lang=EN-CA>How do I modify the weather input file?</span><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
lang=EN-CA style='font-size:12.0pt'>4)</span></font><font size=1><span
lang=EN-CA style='font-size:7.0pt'> </span></font><span
lang=EN-CA>Are there any other ideas I’m missing that will help us
validate a model as an absolute measure of actual building energy consumption?</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>Thank you for your help,<br>
Katherine</span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'> </span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>Katherine Louman-Gardiner, EIT</span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>Mechanical Engineer</span><o:p></o:p></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'> </span><o:p></o:p></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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style='font-size:12.0pt'><br>
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<br>
-- <br>
Carol Gardner PE<o:p></o:p></span></font></p>
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