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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#365F91'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
lang=EN-CA style='color:#365F91'><span style='mso-list:Ignore'>1)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><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></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#365F91'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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></p>
<p class=MsoListParagraph><span lang=EN-CA style='color:#365F91'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
lang=EN-CA style='color:#365F91'><span style='mso-list:Ignore'>2)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><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></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#365F91'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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></p>
<p class=MsoListParagraph><span lang=EN-CA style='color:#365F91'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
lang=EN-CA style='color:#365F91'><span style='mso-list:Ignore'>3)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span
lang=EN-CA style='color:#365F91'>How do I modify the weather input file?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#365F91'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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. </span><span
lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#365F91'>I have yet to hear of any program that can “easily”
incorporate recently recorded weather data. <o:p></o:p></span></p>
<p class=MsoListParagraph><span lang=EN-CA style='color:#365F91'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
lang=EN-CA style='color:#365F91'><span style='mso-list:Ignore'>4)<span
style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><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></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#365F91'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>~Nick<o:p></o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><img width=119 height=37 id="Picture_x0020_1"
src="cid:image001.jpg@01CC0649.FCF07CA0" alt="cid:489575314@22072009-0ABB"></span><b><span
style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Calibri","sans-serif";
color:#CC9900'>PROJECT ENGINEER<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>Smith & Boucher Engineers</span><span style='font-size:7.5pt;
color:#CC9900'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>25501 west valley parkway<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>olathe ks 66061<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>direct 913 344.0036<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>fax 913 345.0617<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a href="www.smithboucher.com"
title="blocked::www.smithboucher.com"><span style='font-size:10.0pt'>www.smithboucher.com</span></a></span><u><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue'> </span></u><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>James V
Dirkes II, PE<br>
<b>Sent:</b> Thursday, April 28, 2011 7:12 PM<br>
<b>To:</b> 'Karen Walkerman'; 'Carol Gardner'<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] eQuest - Model verification<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Weighing in late on this….<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If I get >80% R-squared correlation, I think I’m doing
well! <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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></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 align=center style='text-align:center'><b><span
style='font-size:13.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>The
Building Performance Team<br>
</span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>James V. Dirkes II, P.E., LEED AP, BEMP<br>
</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>1631 Acacia Drive NW<br>
Grand Rapids, MI 49504<br>
616 450 8653<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>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-left:.5in'><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"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Karen
Walkerman<br>
<b>Sent:</b> Thursday, April 28, 2011 3:31 PM<br>
<b>To:</b> Carol Gardner<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] eQuest - Model verification<o:p></o:p></span></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<div>
<p class=MsoNormal style='margin-left:.5in'>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></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'>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></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'>... 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></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'>--<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'>Karen<o:p></o:p></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<div>
<p class=MsoNormal style='margin-left:.5in'>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></p>
<p class=MsoNormal style='margin-left:.5in'>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></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'>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></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'>Carol<o:p></o:p></p>
<div>
<div>
<div>
<p class=MsoNormal style='margin-left:.5in'>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></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'><span style='color:#1F497D'>Katherine,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'>The questions I would have for
you (or your client) are:</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:Symbol;color:#1F497D'>·</span><span
style='font-size:7.0pt;color:#1F497D'>
</span><span style='color:#1F497D'>Is this an existing building, or something
in the design phase?</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:Symbol;color:#1F497D'>·</span><span
style='font-size:7.0pt;color:#1F497D'>
</span><span style='color:#1F497D'>What is the model going to be used for?</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:Symbol;color:#1F497D'>·</span><span
style='font-size:7.0pt;color:#1F497D'>
</span><span style='color:#1F497D'>Is there something magical about the 1%
number?</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:Symbol;color:#1F497D'>·</span><span
style='font-size:7.0pt;color:#1F497D'>
</span><span style='color:#1F497D'>1% of what? Annual electrical consumption?
Annual gas consumption? Both? Monthly electric/gas consumption? Monthly/annual
electrical demand?</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:Symbol;color:#1F497D'>·</span><span
style='font-size:7.0pt;color:#1F497D'>
</span><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><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:Symbol;color:#1F497D'>·</span><span
style='font-size:7.0pt;color:#1F497D'>
</span><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><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='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><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'>I suggest searching the bldg-sim
and equest-users archives for information about weather files.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'>Oh, one more question – how
much money does your client have?</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'>Regards,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'>Bill</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='color:#1F497D'> </span><o:p></o:p></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><b><span style='font-size:10.0pt;color:black'>William Bishop,
PE, BEMP, LEED<sup>®</sup> AP </span></b><b><span style='font-size:10.0pt;
color:#006600'>|</span></b><b><span style='font-size:10.0pt;color:black'>
Pathfinder Engineers & Architects LLP</span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='font-size:9.0pt;color:black'>Mechanical Engineer</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='font-size:5.0pt;color:black'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><b>Error! Filename not specified.</b><span style='font-size:
9.0pt;color:#1F497D'>134 South Fitzhugh
Street
Rochester, NY 14608<br>
T: <a href="tel:%28585%29%20325-6004" target="_blank">(585) 325-6004</a> </span><span
style='font-size:9.0pt;color:black'>Ext. 114</span><span style='color:#1F497D'>
</span><span style='font-size:9.0pt;color:#1F497D'>F: <a
href="tel:%28585%29%20325-6005" target="_blank">(585) 325-6005</a></span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><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><o:p></o:p></p>
</div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span style='font-size:18.0pt;font-family:Webdings;
color:green'>P</span><span style='color:green'> </span><span
style='font-size:7.5pt;color:green'>Sustainability – the forest AND the
trees.</span><span style='font-size:18.0pt;font-family:Webdings;color:green'> P</span><span
style='font-size:18.0pt;color:green'> </span><span
style='font-size:18.0pt;font-family:Webdings;color:green'> </span><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><span style='font-size:10.0pt'>From:</span></b><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>On Behalf Of </b>Katherine Louman-Gardiner<br>
<b>Sent:</b> Thursday, April 28, 2011 1:49 PM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] eQuest - Model verification</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span lang=EN-CA>Hi All,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span lang=EN-CA>Our client would like us to produce an
eQuest model that</span><o:p></o:p></p>
<p style='margin-left:.5in'><span lang=EN-CA>a)</span><span lang=EN-CA
style='font-size:7.0pt'> </span><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'><span lang=EN-CA>b)</span><span lang=EN-CA
style='font-size:7.0pt'> </span><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'><span lang=EN-CA>c)</span><span lang=EN-CA
style='font-size:7.0pt'> </span><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'><span lang=EN-CA>Do any of you have experience trying to
validate models like this? </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span lang=EN-CA>My concern is that models are
approximations, and will not account for small changes in occupancy, outdoor
weather, etc. </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span lang=EN-CA>I guess my questions are these:</span><o:p></o:p></p>
<p style='margin-left:.5in'><span lang=EN-CA>1)</span><span lang=EN-CA
style='font-size:7.0pt'> </span><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'><span lang=EN-CA>2)</span><span lang=EN-CA
style='font-size:7.0pt'> </span><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'><span lang=EN-CA>3)</span><span lang=EN-CA
style='font-size:7.0pt'> </span><span lang=EN-CA>How
do I modify the weather input file?</span><o:p></o:p></p>
<p style='margin-left:.5in'><span lang=EN-CA>4)</span><span lang=EN-CA
style='font-size:7.0pt'> </span><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'><span lang=EN-CA>Thank you for your help,<br>
Katherine</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span lang=EN-CA> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span lang=EN-CA>Katherine Louman-Gardiner, EIT</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span lang=EN-CA>Mechanical Engineer</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.5in'><span lang=EN-CA> </span><o:p></o:p></p>
</div>
</div>
</div>
</div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
</div>
</div>
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</blockquote>
</div>
<p class=MsoNormal style='margin-left:.5in'><br>
<br clear=all>
<br>
-- <br>
Carol Gardner PE<o:p></o:p></p>
</div>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'><br>
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