<div dir="ltr">I think the cleanest is you just pretend every day is off by one. Ignore all of the month garbage (yes you'll be off by a day at times). Just think about it as days 1-365, with the right day of the week assigned. You can reassign your holidays if you want. You wind up dropping the real 12/31. <div><br></div><div>But I like the "just use EnergyPlus" option. </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 23, 2015 at 12:57 PM, Jim Dirkes <span dir="ltr"><<a href="mailto:jim@buildingperformanceteam.com" target="_blank">jim@buildingperformanceteam.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:large;color:#b45f06"><ol><li>Use EnergyPlus :), which allows >365 days. This is also helpful when the combined two-fuel billing cycle is 13-14 months.</li><li>Ignore the 1/365 difference. Do you really think it will matter much?</li></ol></div></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Tue, Jun 23, 2015 at 2:48 PM, Joe Huang <span dir="ltr"><<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
This is a little off-topic, but something I've pondered for some
time...<br>
<br>
The question is when people are using eQUEST/DOE-2 with historical
year weather, what do you do when it's a leap year? Since DOE-2<br>
always simulates a 365-day year, do you just ignore the missing
leap day, but then don't the Days of Week also get screwed up
starting in March?<br>
<br>
Since a quarter of the years are leap years, I've never understood
why accounting for them has been considered an insignificant detail.
<br>
I mean, if I told you that a quarter of the time your simulation
results would be a little wrong, isn't that a pretty high frequency?<br>
<br>
Many eQUEST/DOE-2 users also have the mistaken impression that the
fault lies in the DOE-2 weather files, which is not true. <br>
Believe it or not, but the packed DOE-2 weather file format actually
contains 384 days (32 days per month), and all the DOE-2 weather
files I produce always contains Feb. 29 for the leap years (as well
as other enhancements like greater precision in the data).<br>
<br>
So, where does the problem lie? It's in the clock within DOE-2 that
always sets February to be 28 days. In other words, DOE-2 will read
the weather file and do the simulation only through February 28th,
even though the weather file contains data through February 32nd
(:-)), although everything beyond the 28th would be blank on
non-leap years, and beyond the 29th on leap years. <br>
<br>
When I've looked through the DOE-2.1E code, there are even flags
setting the leap years but these are never used. I've thought many
times of toying around with the code to see how difficult it would
be to implement leap years, but just haven't gotten around to it.
As far as I can see, the biggest difficulty might might have to do
not with the simulation itself, but with the reporting.<br>
<br>
I'd like to know if others think this is something of sufficient
importance to merit further investigation.<br>
<br>
Joe<br>
<br>
<pre cols="90">Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a>
<a href="http://weather.whiteboxtechnologies.com" target="_blank">http://weather.whiteboxtechnologies.com</a> for simulation-ready weather data
(o) <a href="tel:%28925%29388-0265" value="+19253880265" target="_blank">(925)388-0265</a>
(c) <a href="tel:%28510%29928-2683" value="+15109282683" target="_blank">(510)928-2683</a>
"building energy simulations at your fingertips"
</pre>
<div>On 6/23/2015 10:27 AM, Collinge,
William Overton wrote:<br>
</div>
<blockquote type="cite">
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">All,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">This
is a fantastic thread, and I am wondering if it could be
taken one step further to query if anyone has experience
with methods to attempt calibrating models of energy savings
attributable to retrofits of multiple systems simultaneously
(plant, envelope, HVAC etc. – as most real-world retrofits
likely are), going past the 4- or 5-parameter breakpoint
regression models to incorporate inverse modeling of
specific load types and their space- or time-variable
characteristics. This would fit under multivariate methods
in the last line of Table 2 in the older version of ASHRAE
Guideline 14 that Jeff Haberl has posted on his website, and
would attempt to standardize Maria’s Step 5 below without
(possibly) the need to conduct as much in-depth field
verification as might otherwise be required. I’ve dabbled in
this a little bit…without extensive discussions with others…<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Example:
changing the OA ventilation rate is going to have a specific
load profile versus some retrofit that affects the solar
gain rate. Of course, much easier in theory to do
calibrations of this sort with hourly meter data versus
monthly utility bills…<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Bill
Collinge<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Postdoctoral
Scholar<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">University
of Pittsburgh<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Department
of Civil and Environmental Engineering<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<div>
<div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">
Bldg-sim [<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">mailto:bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Maria Karpman<br>
<b>Sent:</b> Tuesday, June 23, 2015 12:02 PM<br>
<b>To:</b> 'Jeff Haberl'; 'Joe Huang';
<a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Bldg-sim] Energy model calibration
- normalizing the utility bills to month start-end<u></u><u></u></span></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Hello
all,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">We
usually do the following to calibrate model to monthly
utility bills:<u></u><u></u></span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><span>1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Create
or purchase weather file corresponding to pre-retrofit
period for which we have billing data. Lately we’ve been
using WeatherAnalytics files, which we found to be more cost
effective than creating our own (they charge $40 for an
annual file).<u></u><u></u></span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><span>2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Run
simulation using this weather file instead of TMY.<u></u><u></u></span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><span>3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Standard
simulation reports (we typically use eQUEST) show usage by
calendar month (e.g. January, February, etc.) which is
usually not aligned with dates of utility bills, as noted in
the question that started this thread. As Brian mentioned in
one of the earlier posts, this may be circumvented by
entering the actual meter read dates into eQUEST as shown in
the screenshot below. This will align usages shown in
eQUEST’s “E*” reports such as ES-E with the actual utility
bills. The approach does not allow entering more than one
read date per month (e.g. we can’t capture April 3 – 28
bill). For projects where this limitation is an issue we
generate hourly reports that show consumption by end use for
each meter in the project, and aggregate it into periods
that are aligned with utility bills.
<u></u><u></u></span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><img src="cid:part1.04070904.00090904@whiteboxtechnologies.com" height="330" width="444"><u></u><u></u></span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"> <u></u><u></u></span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><span>4)<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">We
then copy simulation outputs (either from ES-E or hourly
reports, depending on the method used) into a standard
spreadsheet with utility data. The spreadsheet is set up to
plot side by side monthly utility bills and simulated usage,
and also calculates normalized mean bias error (NMBE) and
variance CV(RMSE). <u></u><u></u></span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><span>5)<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">If
we did not to where we want to be with NMBE and CV(RMSE) we
adjust and re-run the model, and re-paste results into the
same spreadsheet.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">In
my experience regression analysis using weather as
independent variable (i.e. running model with TMY file and
normalizing for difference in weather) or relying on HDD
to allocate usage to billing periods can be very
misleading, mainly because on many projects weather is not
the main driver of consumption. For example energy usage
of a school during a given time period depends much more
on vacation schedule than outdoor dry bulb temperatures. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Thanks,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">--
<u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;color:#666666">Maria
Karpman
</span></b><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;color:#666666">LEED
AP, BEMP, CEM</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;color:#666666">________________</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;color:#666666">Karpman
Consulting<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#666666"><a href="http://www.karpmanconsulting.net/" target="_blank">www.karpmanconsulting.net</a>
</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#666666">Phone </span><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#666666;background:white"><a href="tel:860.430.1909" value="+18604301909" target="_blank">860.430.1909</a> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#666666">41C
New London Turnpike</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#666666">Glastonbury,
CT 06033</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u><u></u></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></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;color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext">
Bldg-sim [<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">mailto:bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Jeff Haberl<br>
<b>Sent:</b> Tuesday, June 23, 2015 10:16 AM<br>
<b>To:</b> Joe Huang; <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Bldg-sim] Energy model calibration
- normalizing the utility bills to month start-end<u></u><u></u></span></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">Hello
Joe,<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">Yes,
you can count the degree days and regress against that to
show a correlation. However, one will get a better "fit"
to the weather data if you regress to the degree day that
is calculated for the balance point temperature of the
building -- hence the inverse model toolkit or the
variable based degree day method.<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">PRISM
actually calculates the degree days to a variety of change
points and actually provides a table for each location
that you use as a look up. The IMT will actually perform a
variable based degree day calculation that agrees well
with PRISM. IMT will also provide you with the average
daily temperature for the billing period.<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">When
using DOE-2 for actual billing periods, one will have to
extract the appropriate hourly variable, sum it to daily
and then regroup to align with the billing periods. Here's
a chunk of code that will create a dummy plant, display
PV-A, PS-A, PS-E and BEPS, and extract the relevant hourly
variables to normalize the BEPS to the utility bills:<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">INPUT
PLANT ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">PLANT-REPORT
VERIFICATION = (PV-A)<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
PV-A, EQUIPMENT SIZES<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">SUMMARY
= (PS-A,PS-E,BEPS)<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
PS-A, PLANT ENERGY UTILIZATION SUMMARY<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
PS-E, MONTHLY ENERGY END USE SUMMARY<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
BEPS, BUILDING ENERGY PERFORMANCE SUMMARY<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">HVAC=PLANT-ASSIGNMENT
..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
EQUIPMENT DESCRIPTION<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
ELECTRIC DOMESTIC WATER HEATER<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">BOIL-1
=PLANT-EQUIPMENT TYPE=ELEC-DHW-HEATER SIZE=-999 ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
ELECTRIC HOT-WATER BOILER<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">BOIL-2
=PLANT-EQUIPMENT TYPE=ELEC-HW-BOILER SIZE=-999 ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
HERMETICALLY SEALED CENT CHILLER<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">CHIL-1
=PLANT-EQUIPMENT TYPE=HERM-CENT-CHLR SIZE=-999 ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
Graphics block for Data Processing ***<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">RP-3
= SCHEDULE THRU DEC 31 (ALL) (1,24) (1) ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
8 = Total PLANT heating load (Btu/h)<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
9 = Total PLANT cooling load (Btu/h)<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">$
10 = Total PLANT electric load (Btu/h)<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">BLOCK-3-1
= REPORT-BLOCK<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">VARIABLE-TYPE
= PLANT<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">VARIABLE-LIST
= (8,9,10) ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">BLOCK-3-2
= REPORT-BLOCK<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">VARIABLE-TYPE
= GLOBAL<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">VARIABLE-LIST
= (1) ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">HR-3
= HOURLY-REPORT<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">REPORT-SCHEDULE
= RP-3<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">REPORT-BLOCK
= (BLOCK-3-1,BLOCK-3-2) ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">END
..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">COMPUTE
PLANT ..<u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black"> <u></u><u></u></span></p>
<p><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:black">STOP
..<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"> <u></u><u></u></span></p>
<div>
<div>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:blue">8=!
8=) :=) 8=) ;=) 8=) 8=( 8=) 8=() 8=) 8=|
8=) :=') 8=) 8=?<br>
Jeff S. Haberl,
Ph.D.,P.E.inactive,FASHRAE,FIBPSA,......<a href="mailto:........jhaberl@tamu.edu" target="_blank">jhaberl@tamu.edu</a><br>
Professor........................................................................Office
Ph: <a href="tel:979-845-6507" value="+19798456507" target="_blank">979-845-6507</a><br>
Department of
Architecture............................................Lab
Ph:<a href="tel:979-845-6065" value="+19798456065" target="_blank">979-845-6065</a><br>
Energy Systems
Laboratory...........................................FAX:
<a href="tel:979-862-2457" value="+19798622457" target="_blank">979-862-2457</a><br>
Texas A&M
University...................................................77843-3581<br>
College Station, Texas, USA,
77843.............................<a href="http://esl.tamu.edu" target="_blank">http://esl.tamu.edu</a><br>
8=/ 8=) :=) 8=) ;=) 8=) 8=() 8=) :=) 8=)
8=! 8=) 8=? 8=) 8=0<u></u><u></u></span></p>
</div>
</div>
</div>
<div>
<div class="MsoNormal" style="text-align:center" align="center">
<hr align="center" size="2" width="100%">
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">
Bldg-sim [<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] on
behalf of Joe Huang [<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a>]<br>
<b>Sent:</b> Monday, June 22, 2015 9:17 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> Re: [Bldg-sim] Energy model
calibration - normalizing the utility bills to month
start-end</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Maybe
I'm missing something here, but why can't you just count
up the degree days for the utility period?<br>
I hope you're not working with average or "typical year"
degree days, but the degree days from the same time
period.<br>
<br>
I also recall that the old Princeton Scorekeeping Method
(PRISM) back in the 1980's allows the user to enter the
degree days for that time period, so it's not a new
problem.<br>
<br>
Joe<br>
<br>
<u></u><u></u></p>
<pre>Joe Huang<u></u><u></u></pre>
<pre>White Box Technologies, Inc.<u></u><u></u></pre>
<pre>346 Rheem Blvd., Suite 205A<u></u><u></u></pre>
<pre>Moraga CA 94556<u></u><u></u></pre>
<pre><a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a><u></u><u></u></pre>
<pre><a href="http://weather.whiteboxtechnologies.com" target="_blank">http://weather.whiteboxtechnologies.com</a> for simulation-ready weather data<u></u><u></u></pre>
<pre>(o) <a href="tel:%28925%29388-0265" value="+19253880265" target="_blank">(925)388-0265</a><u></u><u></u></pre>
<pre>(c) <a href="tel:%28510%29928-2683" value="+15109282683" target="_blank">(510)928-2683</a><u></u><u></u></pre>
<pre>"building energy simulations at your fingertips"<u></u><u></u></pre>
<div>
<p class="MsoNormal">On 6/22/2015 6:09 AM, Jones,
Christopher wrote:<u></u><u></u></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">When calibrating an energy model
to utility bills the utility bills often don’t align
with the month start and end. I have reviewed a
couple methods to calendar normalize the utility
bills but find them somewhat unsatisfactory.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">For example the method I am
looking at does the following:<u></u><u></u></p>
<p class="MsoNormal">The April gas bill runs from
March 25 – April 24. The algorithm takes the
average number of m3 per day from that bill, applies
it to the days in April. Then it takes the average
number of days from the May bill which runs from
April 24 – May 25 and applies that average to the
remaining days in April. <u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">The issue is that the March-April
period has much higher HDD than the April-May period
and the “normalized” gas usage is significantly
lower than the simulation data for April.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">I am wondering if there are any
papers or other sources of information as to how
others approach this problem.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><img src="cid:part9.07000908.02060004@whiteboxtechnologies.com" alt="cid:image003.png@01D09C46.E75BA0D0" border="0" height="43" width="108"></span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1c467a">Christopher
Jones,</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">P.Eng.<i>
<br>
</i></span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d" lang="EN-CA">Senior Engineer</span><u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d" lang="EN-CA">WSP Canada Inc.</span></b><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d" lang="EN-CA">2300 Yonge Street, Suite 2300</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d" lang="EN-CA">Toronto, ON M4P 1E4</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#595959" lang="EN-CA"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d" lang="EN-CA">T <a href="tel:%2B1%20416-644-4226" value="+14166444226" target="_blank">+1 416-644-4226</a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d" lang="EN-CA">F <a href="tel:%2B1%20416-487-9766" value="+14164879766" target="_blank">+1 416-487-9766</a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d" lang="EN-CA">C <a href="tel:%2B1%20416-697-0065" value="+14166970065" target="_blank">+1 416-697-0065</a></span><u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d" lang="EN-CA"><a href="http://www.wspgroup.com/" target="_blank">www.wspgroup.com</a>
</span><u></u><u></u></p>
</div>
<p class="MsoNormal"> <u></u><u></u></p>
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<br></blockquote></div><br><br clear="all"><div><br></div></div></div>-- <br><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><p><span style="font-size:10pt;font-family:Arial,sans-serif;color:black;background-image:initial;background-repeat:initial"></span></p>James V Dirkes II, PE, BEMP, LEED AP<br>CEO/President<br>The Building Performance Team Inc.<br>1631 Acacia Dr, GR, Mi 49504<br><br>Direct: <a href="tel:616.450.8653" value="+16164508653" target="_blank">616.450.8653</a><br><a href="mailto:jim@buildingperformanceteam.com" target="_blank">jim@buildingperformanceteam.com</a><br><br><a href="http://buildingperformanceteamcom" target="_blank">Website </a>l <a href="https://www.linkedin.com/pub/jim-dirkes/7/444/413" target="_blank">LinkedIn</a><p align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center"><b><i><span style="font-size:14.0pt;line-height:115%;font-family:"MS Reference Sans Serif","sans-serif""> </span></i></b><span style="font-family:"MS Reference Sans Serif","sans-serif""></span></p><p style="vertical-align:middle">
</p><p style="margin-top:6.0pt"><span style="font-family:Calibri,sans-serif"><font size="4" style="background-color:rgb(255,255,255)" color="#0000ff">Studies show that four out of every three people have a hard time with math.</font><span style="font-size:10pt"></span></span></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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