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Oconomowoc Area School DistrictEnergy Update
Oconomowoc Area School DistrictEnergy Update
6-Month Status ReportDecember 2005 – May 2006
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Primary GoalsEnergy Management
Program
Primary GoalsEnergy Management
Program Maintain Comfort & Safety in Occupied Areas
Coordinate usage of facilities and monitor operational efficiency of equipment vs. design.
Eliminate Energy Waste Audit buildings during unoccupied times. Monitor building usage during occupied times Track & analyze consumption for building efficiency Use diagnostic loggers to track waste Maintain energy policy and guidelines
Save Dollars Minimize consumption and demand charges Evaluate usage trends for abnormalities
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Comparing Apples to Apples
Changes in Weather
Changes in Building Square Footage
Special Adjustments (changes in equipment or programs)
The accounting program adjusts the Base Year consumption to reflect these changes and an Apples to Apples comparison is achieved.
In order to make a valid comparison between consumption in the Base Year and consumption in a Savings Year certain criteria must be taken into account.
Differences in the length of the Billing Periods
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Total Utility Cost Distribution (6 months)
Total Utility Cost Distribution (6 months)
Electric34%
Water / Sewer5%
Natural Gas61%
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Electric Utility Comparison (6 Months)
Electric Utility Comparison (6 Months)
2.9602.353
3.1
0.000
1.000
2.000
3.000
4.000
5.000
6.000
Usa
ge (
Mill
ion
kW
h)
Usage
ActualDec04
to May05
Actual Dec05
to May06
Expected Dec05
to May06
$0
$50,000
$100,000
$150,000
$200,000
$250,000
$300,000
Cos
t (D
olla
rs)
Cost
ActualDec04
to May06
Actual Dec05
to May06
Expected Dec05
to May06
• Average Unit Cost Increased 32.0%• Total Avoided Use = 746,812 kWh• Expected minus Actual = $59,163 Cost Avoided
6
Natural Gas Utility Comparison (6 Months)
Natural Gas Utility Comparison (6 Months)
376.5
308.3
385.3
0
100
200
300
400
500
Usa
ge (
Th
ousa
nd
Th
erm
s)
Usage
ActualDec04
to May05
Actual Dec05
to May06
Expected Dec05
toMay06
$0$50,000
$100,000$150,000$200,000$250,000$300,000$350,000$400,000$450,000$500,000
Cos
t (D
olla
rs)
Cost
ActualDec04
to May05
Actual Dec05
to May06
Expected Dec05
to May06
• Average Unit Cost Increased 26.2%• Total Avoided Use = 76,961 Therms• Expected minus Actual = $85,499 Cost Avoided
7
Water/Sewer Utility Comparison (6 Months)
Water/Sewer Utility Comparison (6 Months)
4.9 5.15.0
0
2
4
6
8
Usa
ge (
Th
ousa
nd
KG
al)
Usage
ActualDec04
to May05
Actual Dec05
to May06
Expected Dec05
to May06
$0
$10,000
$20,000
$30,000
$40,000
$50,000
Cos
t (D
olla
rs)
Cost
ActualDec04
to May05
Actual Dec05
to May06
Expected Dec05
to May06
• Average Unit Cost showed minimal change• Total Avoided Use = Increased 88 KGal• Expected minus Actual = -$430
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Monthly/Total Cost Avoidance (6 Months)
Monthly/Total Cost Avoidance (6 Months)
$0
$50,000
$100,000
$150,000
Dol
lars
Monthly Savings Savings to Date
6-Months $ 144,232
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Environmental BenefitsEnvironmental BenefitsThe EPA estimates that every kilowatt-hour (kWh) of electricity use avoided prevents the emission of the following: 1.5 pounds of carbon dioxide 5.8 grams of sulfur dioxide 2.5 grams of nitrogen oxides.
Our District has saved over 740,000 kWh in a 6-Month period. These savings are equal to:
1,120,000 pounds of carbon dioxide emissions being prevented, or
105 automobiles being removed from the highways annually, or
217 acres of trees being planted.
Copyright 2006, Energy Education, Inc. This material is the property of Energy Education, Inc. and cannot be reproduced without the express written consent of Energy Education, Inc. Unauthorized duplication of this copyrighted material is a violation of federal law and subject to both criminal and civil penalties.
