When calibrating to either monthly utility bills, meters, sub-meters, or other means, are there variance or percent error metrics that show proper calibration? What are some sources for this information?
The most important ones are:
The materials you want to read are:
I haven't tried it but I know that OpenStudio lets you enter utility bill data and then calculates those metrics for you after your run.
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Thank you for the detailed answer. I have used the utility bill feature in OpenStudio and that does provide a good graphic representation on your monthly calibration, along with your NMBE and CvRMSE compared to ASHRAE Guideline 14.
Btw, obviously that's only going to work if you're using an AMY weather file. Otherwise, there's a - somewhat poor except for simple buildings - workaround which consists in doing a multiple regression analysis to weather normalize your bills (dry bulb only), and calculating NMBE&CV(RMSE) based on weather normalized bills and outputs from TMY3 simulation.
This is notably used for New York (NYSERDA MPP) and New Jersey (P4P) multifamily programs, and Etracker by John Kelly Kissock (based on ASHRAE RP1050) is being used for the regression (I'd rather do my own regression but that's just me)
Asked: 2014-09-01 22:25:32 -0500
Seen: 2,055 times
Last updated: Sep 05 '14
