[Bldg-sim] Energy model calibration - normalizing the utility bills to month start-end

[bfountain at greensim.com]

Hi Chris,

 

FASER and Metrix also calculated degree days in the actual billing periods.

 

I would be inclined to match the simulation to the billing periods.
Assuming you are using a DOE-2 based tool, I do not know how to change the
dates reported in the PS-E reports.  However you could create 12 periods in
the electrical and fuel rates based on the billing dates.  Then the ES-E and
ES-F would report the energy as well as cost split by billing period.

 

Cheers,

 

BF

From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of
Joe Huang
Sent: June-22-15 10:18 PM
To: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Energy model calibration - normalizing the utility
bills to month start-end

 

Maybe I'm missing something here, but why can't you just count up the degree
days for the utility period?
I hope you're not working with average or "typical year" degree days, but
the degree days from the same time period.

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.

Joe




Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
http://weather.whiteboxtechnologies.com for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"

On 6/22/2015 6:09 AM, Jones, Christopher wrote:

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.

 

For example the method I am looking at does the following:

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.  

 

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.

 

I am wondering if there are any papers or other sources of information as to
how others approach this problem.

 

 

cid:image003.png at 01D09C46.E75BA0D0

Christopher Jones,P.Eng. 
Senior Engineer

 

WSP Canada Inc.

2300 Yonge Street, Suite 2300

Toronto, ON M4P 1E4
T +1 416-644-4226

F +1 416-487-9766

C +1 416-697-0065

 

www.wspgroup.com <http://www.wspgroup.com/>  

 

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