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

Joe Huang yjhuang at whiteboxtechnologies.com
Mon Jun 22 19:17:33 PDT 2015


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/> //
>
> ------------------------------------------------------------------------------------------
>
> You are receiving this communication because you are listed as a current WSP contact. 
> Should you have any questions regarding WSP’s electronic communications policy, please 
> consult our Anti-Spam Commitment www.wspgroup.com/casl. For any concern or if you 
> believe you should not be receiving this message, please forward this message to us at 
> caslcompliance at wspgroup.com <mailto:caslcompliance at wspgroup.com> so that we can promptly 
> address your request. This message is intended only for the use of the individual or 
> entity to which it is addressed, and may contain information which is privileged, 
> confidential, proprietary or exempt from disclosure under applicable law. If you are not 
> the intended recipient or the person responsible for delivering the message to the 
> intended recipient, you are strictly prohibited from disclosing, distributing, copying 
> or in any way using this message. If you have received this communication in error, 
> please notify the sender, and destroy and delete any copies you may have received.
>
> WSP provides professional land surveying services through the following entities: WSP 
> Surveys (AB) Limited Partnership and WSP Surveys (BC) Limited Partnership
>
>
> _______________________________________________
> Bldg-sim mailing list
> http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20150622/8fbfb151/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 6574 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20150622/8fbfb151/attachment.png>


More information about the Bldg-sim mailing list