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<DIV style="FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: 12pt">
<DIV>As to James posting on this issue the weather data platform we are just
finishing has cleaned up and localized weather input and can deliver a
continuously updated stream of recent history and current conditions with direct
web services access to any and all data. In other words, we have the
weather data side of the client’s desire all set. We are very happy to
cooperate with any efforts to integrate, assimilate or utilize this in a model
or models. Indeed we are looking for partners here, as we believe this is
going to be an increasingly important element in the solution to upgrading
existing buildings. So if anyone wants to take on this part of the problem
for <FONT style="FONT-SIZE: 11pt">Katherine, we will supply the weather data
portion for free.</FONT></DIV>
<DIV> </DIV>
<DIV>Chuck</DIV>
<DIV> </DIV>
<DIV
style="FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: 12pt">_____________________<BR>Chuck
Khuen<BR>Principal<BR>Weather Analytics
Inc.<BR>www.weatheranalytics.com<BR>781-856-5383</DIV>
<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A
title=jim@buildingperformanceteam.com
href="mailto:jim@buildingperformanceteam.com">James V Dirkes II, PE</A> </DIV>
<DIV><B>Sent:</B> Friday, April 29, 2011 12:02 PM</DIV>
<DIV><B>To:</B> <A title=bldg-sim@lists.onebuilding.org
href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</A>
</DIV>
<DIV><B>Subject:</B> Re: [Bldg-sim] eQuest - Model
verification</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">
<DIV class=WordSection1>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">FYI,
Check out <A
href="http://www.Weatheranalytics.com">www.Weatheranalytics.com</A> for
“AMY” (Actual Meteorological Year) data. They’re a new player in this
arena and seem to have their act together. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p></o:p></SPAN> </P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p></o:p></SPAN> </P>
<DIV>
<P style="TEXT-ALIGN: center" class=MsoNormal align=center><B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 13.5pt">The
Building Performance Team<BR></SPAN></B><B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">James
V. Dirkes II, P.E., LEED AP, BEMP<BR></SPAN></B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">1631
Acacia Drive NW<BR>Grand Rapids, MI 49504<BR>616 450
8653<o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p></o:p></SPAN> </P>
<DIV>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt"> Jorge Torres-Coto
[mailto:jtorres-coto@mbo1.com] <BR><B>Sent:</B> Friday, April 29, 2011 10:49
AM<BR><B>To:</B> 'Nick Caton'; 'James V Dirkes II, PE'; '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 style="MARGIN-LEFT: 0.5in" class=MsoNormal><o:p></o:p> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: navy; FONT-SIZE: 10pt">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></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: navy; FONT-SIZE: 10pt"><o:p></o:p></SPAN> </P>
<DIV>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="COLOR: navy; FONT-SIZE: 10pt">Jorge E. Torres Coto </SPAN><SPAN
style="BORDER-BOTTOM: windowtext 1pt; BORDER-LEFT: windowtext 1pt; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; LAYOUT-GRID-MODE: line; PADDING-RIGHT: 0in; BACKGROUND: black; COLOR: black; FONT-SIZE: 1pt; BORDER-TOP: windowtext 1pt; BORDER-RIGHT: windowtext 1pt; PADDING-TOP: 0in"> </SPAN><SPAN
style="COLOR: navy; FONT-SIZE: 10pt"><IMG id=_x0000_i1027 border=0
src="cid:F6CFB325307942BB805CBC8EA8BE5C94@CharlesPC" width=39
height=39><o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="COLOR: navy; FONT-SIZE: 10pt">4830 Viewridge Ave.<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="COLOR: navy; FONT-SIZE: 10pt" lang=ES-MX>San Diego, CA
92123<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="COLOR: navy; FONT-SIZE: 10pt"
lang=ES-MX>p
858.751.0933<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="COLOR: navy; FONT-SIZE: 10pt"
lang=ES-MX>f
858.751.0937<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="COLOR: navy; FONT-SIZE: 10pt">c
858.688.6088<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN style="COLOR: navy"><IMG
id=_x0000_i1028 border=0 src="cid:50AAEBA10D2D4A4CB68A5EBFC36F9F91@CharlesPC"
width=181 height=159></SPAN><o:p></o:p></P></DIV>
<DIV>
<DIV style="TEXT-ALIGN: center; MARGIN-LEFT: 0.5in" class=MsoNormal
align=center>
<HR align=center SIZE=2 width="100%">
</DIV>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Nick
Caton<BR><B>Sent:</B> Friday, April 29, 2011 7:42 AM<BR><B>To:</B> James V
Dirkes II, PE; Karen Walkerman; Carol Gardner<BR><B>Cc:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> Re: [Bldg-sim] eQuest - Model
verification</SPAN><o:p></o:p></P></DIV>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><o:p></o:p> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt">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 style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"
lang=EN-CA>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 style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="TEXT-INDENT: -0.25in; MARGIN-LEFT: 1in; mso-list: l0 level1 lfo2"
class=MsoListParagraph><SPAN style="COLOR: #365f91" lang=EN-CA><SPAN
style="mso-list: ignore">1)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="COLOR: #365f91" 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%?<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA>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 style="MARGIN-LEFT: 1in" class=MsoListParagraph><SPAN style="COLOR: #365f91"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="TEXT-INDENT: -0.25in; MARGIN-LEFT: 1in; mso-list: l0 level1 lfo2"
class=MsoListParagraph><SPAN style="COLOR: #365f91" lang=EN-CA><SPAN
style="mso-list: ignore">2)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="COLOR: #365f91" 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?<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA>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 style="MARGIN-LEFT: 1in" class=MsoListParagraph><SPAN style="COLOR: #365f91"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="TEXT-INDENT: -0.25in; MARGIN-LEFT: 1in; mso-list: l0 level1 lfo2"
class=MsoListParagraph><SPAN style="COLOR: #365f91" lang=EN-CA><SPAN
style="mso-list: ignore">3)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="COLOR: #365f91" lang=EN-CA>How do I modify the
weather input file?<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA>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></P>
<P style="MARGIN-LEFT: 1in" class=MsoListParagraph><SPAN style="COLOR: #365f91"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="TEXT-INDENT: -0.25in; MARGIN-LEFT: 1in; mso-list: l0 level1 lfo2"
class=MsoListParagraph><SPAN style="COLOR: #365f91" lang=EN-CA><SPAN
style="mso-list: ignore">4)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="COLOR: #365f91" 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?<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #365f91; FONT-SIZE: 11pt"
lang=EN-CA>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 style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"
lang=EN-CA>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 style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"
lang=EN-CA><o:p></o:p></SPAN> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"
lang=EN-CA>~Nick<o:p></o:p></SPAN></P>
<DIV>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><IMG
id=Picture_x005f_x0020_1 border=0 alt=cid:489575314@22072009-0ABB
src="cid:CE2C8A88F41E40089ED6205C1F5E8B76@CharlesPC" width=119
height=37></SPAN><B><SPAN
style="FONT-FAMILY: 'Stylus BT','sans-serif'; COLOR: #2d4d5e; FONT-SIZE: 11pt"><o:p></o:p></SPAN></B></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Stylus BT','sans-serif'; COLOR: #2d4d5e; FONT-SIZE: 11pt"><o:p></o:p></SPAN></B> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Stylus BT','sans-serif'; COLOR: #2d4d5e; FONT-SIZE: 11pt">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 style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #cc9900; FONT-SIZE: 7.5pt">PROJECT
ENGINEER<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #2d4d5e; FONT-SIZE: 10pt">Smith
& Boucher Engineers</SPAN><SPAN
style="COLOR: #cc9900; FONT-SIZE: 7.5pt"><o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #2d4d5e; FONT-SIZE: 10pt">25501
west valley parkway<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #2d4d5e; FONT-SIZE: 10pt">olathe
ks 66061<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #2d4d5e; FONT-SIZE: 10pt">direct
913 344.0036<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #2d4d5e; FONT-SIZE: 10pt">fax
913 345.0617<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><A
title=blocked::www.smithboucher.com href="wlmailhtml:www.smithboucher.com"><SPAN
style="FONT-SIZE: 10pt">www.smithboucher.com</SPAN></A></SPAN><U><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: blue; FONT-SIZE: 10pt">
</SPAN></U><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p></o:p></SPAN></P></DIV>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p></o:p></SPAN> </P>
<DIV>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">
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 style="MARGIN-LEFT: 0.5in" class=MsoNormal><o:p></o:p> </P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Weighing
in late on this….<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">If
I get >80% R-squared correlation, I think I’m doing well!
<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">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 style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p></o:p></SPAN> </P>
<P style="TEXT-ALIGN: center; MARGIN-LEFT: 0.5in" class=MsoNormal
align=center><B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 13.5pt">The
Building Performance Team<BR></SPAN></B><B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">James
V. Dirkes II, P.E., LEED AP, BEMP<BR></SPAN></B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">1631
Acacia Drive NW</SPAN><BR><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Grand
Rapids, MI 49504</SPAN><BR><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">616
450 8653<o:p></o:p></SPAN></P>
<P style="MARGIN-LEFT: 0.5in" class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p></o:p></SPAN> </P>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P style="MARGIN-LEFT: 1in" class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">
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 style="MARGIN-LEFT: 1in" class=MsoNormal><o:p></o:p> </P>
<DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal>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 style="MARGIN-LEFT: 1in" class=MsoNormal><o:p></o:p> </P></DIV>
<DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal>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 style="MARGIN-LEFT: 1in" class=MsoNormal><o:p></o:p> </P></DIV>
<DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal>... 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 style="MARGIN-LEFT: 1in" class=MsoNormal><o:p></o:p> </P></DIV>
<DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal>--<o:p></o:p></P></DIV>
<DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal>Karen<o:p></o:p></P></DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal><o:p></o:p> </P>
<DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal>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 style="MARGIN-LEFT: 1in" class=MsoNormal>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 style="MARGIN-LEFT: 1in" class=MsoNormal><o:p></o:p> </P></DIV>
<DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal>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 style="MARGIN-LEFT: 1in" class=MsoNormal><o:p></o:p> </P></DIV>
<DIV>
<P
style="MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 1in; MARGIN-RIGHT: 0in; mso-margin-top-alt: 0in"
class=MsoNormal>Carol<o:p></o:p></P>
<DIV>
<DIV>
<DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal>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-BOTTOM: medium none; BORDER-LEFT: #cccccc 1pt solid; PADDING-BOTTOM: 0in; MARGIN: 5pt 0in 5pt 4.8pt; PADDING-LEFT: 6pt; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in">
<DIV>
<DIV>
<DIV>
<DIV>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d">Katherine,</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d"> </SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><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: 1in"><SPAN
style="FONT-FAMILY: symbol; COLOR: #1f497d">·</SPAN><SPAN
style="COLOR: #1f497d; FONT-SIZE: 7pt">
</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: 1in"><SPAN
style="FONT-FAMILY: symbol; COLOR: #1f497d">·</SPAN><SPAN
style="COLOR: #1f497d; FONT-SIZE: 7pt">
</SPAN><SPAN style="COLOR: #1f497d">What is the model going to be used
for?</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 1in"><SPAN
style="FONT-FAMILY: symbol; COLOR: #1f497d">·</SPAN><SPAN
style="COLOR: #1f497d; FONT-SIZE: 7pt">
</SPAN><SPAN style="COLOR: #1f497d">Is there something magical about the 1%
number?</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 1in"><SPAN
style="FONT-FAMILY: symbol; COLOR: #1f497d">·</SPAN><SPAN
style="COLOR: #1f497d; FONT-SIZE: 7pt">
</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: 1in"><SPAN
style="FONT-FAMILY: symbol; COLOR: #1f497d">·</SPAN><SPAN
style="COLOR: #1f497d; FONT-SIZE: 7pt">
</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: 1in"><SPAN
style="FONT-FAMILY: symbol; COLOR: #1f497d">·</SPAN><SPAN
style="COLOR: #1f497d; FONT-SIZE: 7pt">
</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
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d"> </SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><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
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d"> </SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><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
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d"> </SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d">Oh, one more question – how much
money does your client have?</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d"> </SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d">Regards,</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d">Bill</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: #1f497d"> </SPAN><o:p></o:p></P>
<DIV>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><B><SPAN style="COLOR: black; FONT-SIZE: 10pt">William Bishop,
PE, BEMP, LEED<SUP>®</SUP> AP </SPAN></B><B><SPAN
style="COLOR: #006600; FONT-SIZE: 10pt">|</SPAN></B><B><SPAN
style="COLOR: black; FONT-SIZE: 10pt"> Pathfinder Engineers & Architects
LLP</SPAN></B><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: black; FONT-SIZE: 9pt">Mechanical
Engineer</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN
style="COLOR: black; FONT-SIZE: 5pt"> </SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><B>Error! Filename not specified.</B><SPAN
style="COLOR: #1f497d; FONT-SIZE: 9pt">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="COLOR: black; FONT-SIZE: 9pt">Ext. 114</SPAN><SPAN
style="COLOR: #1f497d">
</SPAN><SPAN style="COLOR: #1f497d; FONT-SIZE: 9pt">F: <A
href="tel:%28585%29%20325-6005" target=_blank>(585)
325-6005</A></SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN style="COLOR: black; FONT-SIZE: 9pt"><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
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN
style="FONT-FAMILY: webdings; COLOR: green; FONT-SIZE: 18pt">P</SPAN><SPAN
style="COLOR: green"> </SPAN><SPAN
style="COLOR: green; FONT-SIZE: 7.5pt">Sustainability – the forest AND the
trees.</SPAN><SPAN
style="FONT-FAMILY: webdings; COLOR: green; FONT-SIZE: 18pt"> P</SPAN><SPAN
style="COLOR: green; FONT-SIZE: 18pt"> </SPAN><SPAN
style="FONT-FAMILY: webdings; COLOR: green; FONT-SIZE: 18pt"></SPAN><o:p></o:p></P>
<DIV>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><B><SPAN style="FONT-SIZE: 10pt">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt"> <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
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal> <o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN lang=EN-CA>Hi All,</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><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: 1in"><SPAN lang=EN-CA>a)</SPAN><SPAN
style="FONT-SIZE: 7pt" lang=EN-CA> </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: 1in"><SPAN lang=EN-CA>b)</SPAN><SPAN
style="FONT-SIZE: 7pt" lang=EN-CA> </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: 1in"><SPAN lang=EN-CA>c)</SPAN><SPAN
style="FONT-SIZE: 7pt" lang=EN-CA>
</SPAN><SPAN lang=EN-CA>Will reflect the actual building energy usage to
within 1%</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN lang=EN-CA>Do any of you have experience trying to
validate models like this? </SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><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
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN lang=EN-CA>I guess my questions are
these:</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 1in"><SPAN lang=EN-CA>1)</SPAN><SPAN
style="FONT-SIZE: 7pt" lang=EN-CA> </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: 1in"><SPAN lang=EN-CA>2)</SPAN><SPAN
style="FONT-SIZE: 7pt" lang=EN-CA> </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: 1in"><SPAN lang=EN-CA>3)</SPAN><SPAN
style="FONT-SIZE: 7pt" lang=EN-CA> </SPAN><SPAN
lang=EN-CA>How do I modify the weather input file?</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 1in"><SPAN lang=EN-CA>4)</SPAN><SPAN
style="FONT-SIZE: 7pt" lang=EN-CA> </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
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN lang=EN-CA>Thank you for your
help,<BR>Katherine</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN lang=EN-CA> </SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN lang=EN-CA>Katherine Louman-Gardiner,
EIT</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN lang=EN-CA>Mechanical Engineer</SPAN><o:p></o:p></P>
<P
style="MARGIN-LEFT: 1in; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
class=MsoNormal><SPAN
lang=EN-CA> </SPAN><o:p></o:p></P></DIV></DIV></DIV></DIV>
<P style="MARGIN-LEFT: 1in" class=MsoNormal><o:p></o:p> </P></DIV></DIV>
<P
style="MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 1in; MARGIN-RIGHT: 0in; mso-margin-top-alt: 0in"
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