Calendarization & Normalization in EnergyCAP
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Transcript of Calendarization & Normalization in EnergyCAP
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Analysis Track
Calendarization & NormalizationPresented by Steve Heinz, PE, CEM
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Calendarization
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
EnergyCAP ‘Reporting Month’
Each utility bill is assigned to a reporting month when entered.
Example:
A bill for April 20–May 20 is assigned to Billing Period of May because a majority of the days are in May even though 1/3rd of the consumption was in April.
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
EnergyCAP ‘Reporting Month’
A 60-day water bill for April 20–June 20 will be called a May bill (May being the reporting month); April and June will report zero consumption.
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
EnergyCAP ‘Reporting Month’ (continued)
For some users, “smoothing out” bills to the calendar month in which the consumption occurred is preferred.
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
This process is called Calendarization.
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Why Calendarize?
Better month-to-month and year-to-year comparisons
“Smooth out” multi-month bills
More representative of actual monthly energy usage
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Why Calendarize? (continued)
Better reports and graphs
Fewer “false alarms” and wasted investigation time
Available only in EnergyCAP Online versions
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Calendarization Process
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Non-weather sensitive meters
Simple average daily use and cost allocation
Spread it out based on days in each calendar month
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Non-weather sensitive meters
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Weather sensitive meters
Split bill into weather sensitive and non-weather sensitive pieces
Simple per day allocation of non-weather sensitive piece
Degree day proration of weather sensitive piece
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Weather sensitive meters
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Most important concept:
On an annual basis, the use and cost totals of calendarized data are equal to actual utility bills (exception: possible year-end rollover)
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Calendarization is a better way to report and display the data
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Non-Calendarized Data
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Calendarized Data
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
How do we determine weather sensitivity?
Similar to Cost Avoidance (M&V)
Statistical correlation of usage vs. degree days
Summer and winter analyzed separately
Results visible for any meter
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Weather sensitivity
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
See some examples:
Login
Buildings & Meters
Navigate to a meter in the tree
Calendarized Data tab, then Use vs. Weather tab
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Normalization
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Why Normalize?
Better year-to-year comparisons of usage (only)
Shows energy usage reduction attributable to your efforts, not due to the weather
Available only in EnergyCAP Online versions
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Normalization Process
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Most important concept:
Normalization shows estimated (hypothetical) data
“How much would I have used if the weather had been equal in every year to 2012?”
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Non-weather sensitive meters
Simple average daily use and cost allocation
No adjustments are made
Spread it out based on days in each calendar month
For non-weather sensitive meters, normalized data=calendarized data
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Weather sensitive meters
Split the bill into weather sensitive and non-weather sensitive pieces
Simple per day allocation of the non-weather sensitive piece
Degree day adjustment of the weather sensitive piece
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Simpler Normalization Process
Q: Wouldn’t this be a lot simpler if I just divided my total usage by total degree days, to give me a simple usage per degree day index?
A: Yes, it would be simpler. It would also be totally invalid, so don’t waste your time doing it.
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Simpler Normalization Process (continued)
The “divide all usage by degree days” assumes that 100% of usage is weather sensitive
But, you don’t want to make weather adjustments where weather has no impact on a meter’s usage
Normalization Result #1Monthly Use Graph
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Normalization Result #2Annual Use Graph
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Normalization Result #3Energy Use Intensity
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Project TrackingTrack Sustainability Projects
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com
Project Appears on ChartEnergy Use Intensity
Questions
Visit the Ace Place to learn more!
©2013 EnergyCAP, Inc. ▪ @energycap ▪ www.EnergyCAP.com