Energy Performance Analysis: Winter Season

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1 Energy Performance Analysis: Winter Season
UCD Training February 28, 2019

2 Performance Analysis: Winter Season
Purpose Use simple indicator to study consumption over cold weather months and identify poor performing facilities in winter Indicator compares energy performance with a ratio-based weather normalizing method over a specific period of time Rationale When cold weather-induced consumption is removed, high energy consumption during the winter months is more apparent Works with both electric and natural gas heating

3 Weather Normalization - Brief
Background Assumes that energy consumption is materially influenced by factors such as weather Energy consumption required to heat a building is relatively proportional to the number of Heating Degree Days (HDD) over that period Correlates monthly energy consumption data with monthly HDD HDD are determined using a balance point, or base temperature, which is the outside temperature below which the building needs heating Typically graphed with HDD on the x-axis and consumption on the y-axis Once plotted, the regression line is the straight line that best fits through the points in the scatter chart. This line describes the model for that meter. Estimated baseload is where the regression line crosses the y-axis Represents a ratio-based (consumption/degree-days) weather normalization method

4 Weather Normalization - Brief
Linear regression – line is the model used for that meter Baseload

5 Performance Analysis: Winter Season
Methodology Uses energy consumption data and HDD from November 1 to April 30 of the school year Creates an energy intensity value for that period Removes effect of weather by dividing intensity value by HDD Resulting indicator ratio is used to compare schools Utilizes the following data from the UCD Utility consumption and floor areas Sources: Board Profile (EDU01) (Raw), Utility Consumption (EUC01) HDD from weather stations used in UCD Source: Weather Station Degree Days file – MEC_EDU - Documents

6 Performance Analysis: Winter Season
Weather Station Degree Days file – screenshot

7 Performance Analysis: Winter Season
What’s Needed From the UCD Board Profile (EDU01) Date Range: FY 20XX Normalization: Raw Go to Tab: Asset List Note Raw data is used as you will be doing simple weather normalization using degree days in the indicator For this demo we are using m3 for natural gas and converting to ekWh

8 Performance Analysis: Winter Season
Steps In Asset List tab, remove all columns except for the five shown below If propane, fuel oil or district heating is used to heat any facilities, keep these columns School Name / Nom de l'école Total Building Area (includes portables and portapaks) / Superficie totale du bâtiment (comprend les salles de classe préfabriquées et ajout modulaire) (ft²) Total Electricity Consumed / Consommation totale d'électricité (kWh) Total Natural Gas Consumed / Consommation totale de gaz naturel (m³) Total Propane Consumed / Consommation totale de propane (L)

9 Performance Analysis: Winter Season
Steps Add new columns as highlighted below: School Name / Nom de l'école Total Building Area (includes portables and portapaks) / Superficie totale du bâtiment (comprend les salles de classe préfabriquées et ajout modulaire) (ft²) Total Electricity Consumed / Consommation totale d'électricité (kWh) Total Natural Gas Consumed / Consommation totale de gaz naturel (m³) Total Propane Consumed / Consommation totale de propane (L) Nov-Apr Electricity Use (kWh) Nov-Apr Electricity Adjusted Use (kWh) Nov-Apr Natural Gas Use (m³) Nov-Apr Propane Use (L) Nov-Apr Total Energy Use (ekWh) HDD Winter Intensity (ekWh/ft2/ HDDx1000)

10 Performance Analysis: Winter Season
Copy and paste the Nov-Apr consumption data From the UCD: Under Facility Tree select the school for analysis Under the Exports tab, select the report: Utility Consumption (EUC01) Date Range: Fiscal Year 20XX Note: This report is used since it has consumption data normalized by calendar month

11 Performance Analysis: Winter Season
Electricity tab Highlight electricity consumption values from November to April Create sum total for these 6 months Copy total to worksheet column Nov-Apr Electricity Use

12 Performance Analysis: Winter Season
Natural Gas tab Highlight gas consumption values from November to April Create sum total for these 6 months Copy total value to worksheet column Nov-Apr Natural Gas Use

13 Performance Analysis: Winter Season
If other fuels exist, repeat process for each fuel tab This process must be repeated for each and every school that will be part of the analysis

14 Performance Analysis: Winter Season
Completing Column Nov-Apr Electricity Adjusted Use (kWh) This column removes the baseload electricity use from the Nov-Apr value Enter electricity use value from the Nov-Apr total (slide 10) in column B Insert formula into Nov-Apr Electricity Adjusted Use (kWh) column cells (C): C = B – (A – B) School Name / Nom de l'école Total Building Area (includes portables and portapaks) / Superficie totale du bâtiment (comprend les salles de classe préfabriquées et ajout modulaire) (ft²) Total Electricity Consumed / Consommation totale d'électricité (kWh) Total Natural Gas Consumed / Consommation totale de gaz naturel (m³) Total Propane Consumed / Consommation totale de propane (L) Nov-Apr Electricity Use (kWh) Nov-Apr Electricity Adjusted Use (kWh) Nov-Apr Natural Gas Use (m³) Nov-Apr Propane Use (L) Nov-Apr Total Energy Use (ekWh) HDD Winter Intensity (ekWh/ft2/ HDDx1000) ABC elementary 25,640 398,456.00 37,986.00 266,500.00 134,544.00 A B C

15 Performance Analysis: Winter Season
Completing Column Nov-Apr Natural Gas Use (m3) Enter natural gas use value from the Nov-Apr total (slide 11) in column D School Name / Nom de l'école Total Building Area (includes portables and portapaks) / Superficie totale du bâtiment (comprend les salles de classe préfabriquées et ajout modulaire) (ft²) Total Electricity Consumed / Consommation totale d'électricité (kWh) Total Natural Gas Consumed / Consommation totale de gaz naturel (m³) Total Propane Consumed / Consommation totale de propane (L) Nov-Apr Electricity Use (kWh) Nov-Apr Electricity Adjusted Use (kWh) Nov-Apr Natural Gas Use (m³) Nov-Apr Propane Use (L) Nov-Apr Total Energy Use (ekWh) HDD Winter Intensity (ekWh/ft2/ HDDx1000) ABC elementary 25,640 398,456.00 37,986.00 266,500.00 134,544.00 32,114.37 D

16 Performance Analysis: Winter Season
Completing Column Nov-Apr Total Energy Use (ekWh) Note the units in ekWh. If natural gas is in m3, multiply m3 value by to get ekWh. Apply the conversion factors for any other types of heating fuel used as applicable. Insert formula into Nov-Apr Total Energy Use (ekWh) column cells (F): F = C + D * E * conversion factor School Name / Nom de l'école Total Building Area (includes portables and portapaks) / Superficie totale du bâtiment (comprend les salles de classe préfabriquées et ajout modulaire) (ft²) Total Electricity Consumed / Consommation totale d'électricité (kWh) Total Natural Gas Consumed / Consommation totale de gaz naturel (m³) Total Propane Consumed / Consommation totale de propane (L) Nov-Apr Electricity Use (kWh) Nov-Apr Electricity Adjusted Use (kWh) Nov-Apr Natural Gas Use (m³) Nov-Apr Propane Use (L) Nov-Apr Total Energy Use (ekWh) HDD Winter Intensity (ekWh/ft2/ HDDx1000) ABC elementary 25,640 398,456.00 37,986.00 266,500.00 134,544.00 32,114.37 467,248.87 A B C D E F

17 Performance Analysis: Winter Season
Completing Column HDD These HDD values are available in a file in the UCD Documents tab Select the HDD value from the list of weather stations that the UCD uses for each specific facility. The weather station used for the facility is found under the General Tab for each facility. Insert appropriate HDD value into HDD column (G) for each facility School Name / Nom de l'école Total Building Area (includes portables and portapaks) / Superficie totale du bâtiment (comprend les salles de classe préfabriquées et ajout modulaire) (ft²) Total Electricity Consumed / Consommation totale d'électricité (kWh) Total Natural Gas Consumed / Consommation totale de gaz naturel (m³) Total Propane Consumed / Consommation totale de propane (L) Nov-Apr Electricity Use (kWh) Nov-Apr Electricity Adjusted Use (kWh) Nov-Apr Natural Gas Use (m³) Nov-Apr Propane Use (L) Nov-Apr Total Energy Use (ekWh) HDD Winter Intensity (ekWh/ft2/ HDDx1000) ABC elementary 25,640 398,456.00 37,986.00 266,500.00 134,544.00 32,114.37 467,248.87 2,256 G

18 Performance Analysis: Winter Season
Completing Winter Intensity Indicator (ekWh/ft2/HDDx1000) Insert formula into column cells (H): H = F/I/G * 1000 Repeat above steps for all schools you want to compare School Name / Nom de l'école Total Building Area (includes portables and portapaks) / Superficie totale du bâtiment (comprend les salles de classe préfabriquées et ajout modulaire) (ft²) Total Electricity Consumed / Consommation totale d'électricité (kWh) Total Natural Gas Consumed / Consommation totale de gaz naturel (m³) Total Propane Consumed / Consommation totale de propane (L) Nov-Apr Electricity Use (kWh) Nov-Apr Electricity Adjusted Use (kWh) Nov-Apr Natural Gas Use (m³) Nov-Apr Propane Use (L) Nov-Apr Total Energy Use (ekWh) HDD Winter Intensity (ekWh/ft2/ HDDx1000) ABC elementary 25,640 398,456.00 37,986.00 266,500.00 134,544.00 32,114.37 467,248.87 2,256 8.08 I A B C D E F G H

19 Performance Analysis: Winter Season
Sort Winter Intensity Indicator (ekWh/ft2/HDDx1000) column Review sorted facilities with highest Winter Intensity Indicator value to determine potential causes for high winter use Sorting from low to high as shown below Note Only compare facilities of the same type (i.e. elementary or secondary schools and Admin as they will have different factor ranges). School Name / Nom de l'école Total Building Area (includes portables and portapaks) / Superficie totale du bâtiment (comprend les salles de classe préfabriquées et ajout modulaire) (ft²) Total Electricity Consumed / Consommation totale d'électricité (kWh) Total Natural Gas Consumed / Consommation totale de gaz naturel (m³) Total Propane Consumed / Consommation totale de propane (L) Nov-Apr Electricity Use (kWh) Nov-Apr Electricity Adjusted Use (kWh) Nov-Apr Natural Gas Use (m³) Nov-Apr Propane Use (L) Nov-Apr Total Energy Use (ekWh) HDD Winter Intensity (ekWh/ft2/ HDDx1000) GHI elementary 48,500 700,597.00 48,690.00 410,250.00 119,903.00 45,875.00 595,168.00 2,108 5.82 DEF elementary 22,400 505,000.00 32,050.00 270,500.00 36,000.00 29,034.00 336,792.24 2,256 6.66 ABC elementary 25,640 398,456.00 37,986.00 266,500.00 134,544.00 32,114.37 467,248.87 8.08

20 Performance Analysis: Winter Season
Review Compare individual schools to others to see which ones are highest For high Winter Intensity Indicator schools, check: equipment schedules heating equipment setpoint temperatures ensure ventilation system isn’t bringing in too much fresh air how the school building is being used: Community use of school Before & after school programs Daycares

21 Performance Analysis: Winter Season
Send your questions to the UCD Help Desk Phone: (416) ext. 115