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Establishing a Baseline, Energy Audits and Energy Star’s Portfolio Manager
Glenn BarnesEnvironmental Finance CenterUniversity of North Carolina at Chapel [email protected]
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8/29/2013
• Energy expenses offer large investment opportunity
• Not addressing these opportunities is costly
• Comprehensive projects yield substantial $ savings
• Where to begin?
Energy Efficiency Premise:Energy Costs are not Fixed Costs
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Session Objectives
• Discuss the importance of benchmarking—understanding where your energy use is currently
• Learn about the ENERGY STAR program and Portfolio Manager, its benchmarking tool
• Introduce energy audits—where your energy use can go
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Assessing Energy Performance
What is a Benchmark?
A standardized, comparablemetric of whole building energy performance.
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• Heighten awareness of energy use• Assess effectiveness of current operations,
policies, practices• Set priorities for upgrade efforts and retrofits• Track, verify, and recognize achievements• Document role in environmental stewardship
and demonstrate success
Why Benchmark?
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Energy Benchmarking•Allows you to gauge your buildings’ efficiency by:
– Comparing buildings across your org– Comparing buildings to national averages– Comparing individual buildings from
year‐to‐year
• First step in developing an energy plan
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Energy Benchmarking
Building age is not an indicator of energy use.
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Comparative MetricIs 60 MPG high or low for this automobile?
Is 90 kBtu/SF/YR high or low for this building?
Fuel Efficiency: MPG
Energy Performance Rating: 1 to 100
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National Energy Performance Rating System
1001 25 50 75Energy Performance Rating
Energy UseHighest Lowest
The rating system overlays a 1 to 100 scale
over national data, giving relative meaning to energy use
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Obtaining an Energy Performance Rating
ENERGY STAR Portfolio Manager
Existing Commercial Buildings
www.energystar.gov/benchmark
ENERGY STAR Target Finder
Commercial New Construction Projects
www.energystar.gov/targetfinder
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ENERGY STAR
• Who here has heard of ENERGY STAR? What do you know about this program?
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• Voluntary climate protection partnership with US EPA and US DOE
• Strategic approach to energy management, promoting energy efficient products and practices
• Helps organizations save money and protect the environment
What is ENERGY STAR?
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• EPA Portfolio Manager – Free tool to benchmark all buildings– Access to planning tools and resources– Permanent record of benchmarks that can be
referenced in the future– www.energystar.gov
ENERGY STAR Continued
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ENERGY STAR Portfolio Manager
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Portfolio Manager• Creates benchmark scores for many types of
facilities• Normalizes scores based on facility
characteristics• Tracks long-term trends in energy use and
cost• Produces ready-made reports for
management and customers
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With Portfolio Manager, you can• Benchmark your facility relative to past
energy performance• Enter your facility data, save it, and share
it with others inside or outside of your organization
• Enter operating characteristics, tailored to each space-use category within your facility.
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With Portfolio Manager, you can• Track multiple energy and water meters,
pumps, motors, and other equipment for each facility
• Monitor energy and water costs, viewing percent improvement across time.
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The Portfolio Manager Score• A high score means:
– Your plant likely has implemented more best practices than other plants similar to yours
– In other words, you are doing well with what you have.
• A high score does not mean:– Your plant is more efficient than every plant with a
lower score– Your plant is energy efficient
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Energy Benchmarking• EPA Energy Star® Portfolio Manager -
Water/Wastewater Treatment Plants• Rating System – 1 to 100• http://www.energystar.gov/index.cfm?c=water
.wastewater_drinking_water
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Portfolio Manager
• New version of Portfolio Manager debuted on July 17
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Portfolio Manager Resources
• Webcats:https://esbuildings.webex.com/mw0307l/mywebex/default.do?siteurl=esbuildings
• User guides:http://www.energystar.gov/buildings/training
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Portfolio Manager in Action
• FBI Building in Chicago, operated by USAA Real Estate
• Measurement and tracking of electricity, gas, and water data, through the use of the ENERGY STAR Portfolio Manager tool
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Portfolio Manager in Action• Started with a rating of 78 in 2006
• By end of 2007, rating was 87– Entire building management staff working as a
team in locating areas for potential energy savings.
• In 2008 the building’s ENERGY STAR rating improved to a 95
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Portfolio Manager in Action• $328,000 in energy efficiency retrofits
• Saving $90,000 annually in energy costs– Shutting down boiler system and adjusting air
handling units/relief fans after hours when outside air is above 50 degrees saves $44,640 annually alone
– Additional measures: updated fluorescent lighting, the installation of a sub metering pilot program
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Smart Management for Small Water Systems
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Portfolio Manager in Action
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Energy Audits“Energy management is not just a “free lunch” – energy management is the lunch that someone pays you to eat!”— Mary Tiger
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Energy Audits
• Expert advice on what energy improvements you can conduct for your water system and your business at large
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Have you had an energy audit previously?
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Site:Building: (Name, year built)
Site Contact ‐Title
Name:Phone:E‐mail:County:Use (Office, etc.)Floor Area: (GSF)Street Address:Mailing Address:City:State:Zip Code:
Surveyor Name:Team:Survey Date: Client ‐ Please complete the top Survey Time: of this page and pages 2 and 3
The section below is completed by WRP assessor.Baseline Energy Data (See Annual Energy Consumption Worksheet):
Total energy index:
Water/sewer cost: $0.00 Per yearGallons per Occupant: #DIV/0!Gallons / sf #DIV/0!
$0.00
Dom hot water
Utilities supplied to bldg. (Enter 1 if present, 2 if present and metered):
Gallons per year
0#DIV/0!
PropaneSteam
Total water use:
After‐hours usage/year ‐
Heating hot waterChilled water
# of floors
# of occupantsHrs. occupied per week
#DIV/0!
Total energy consumed:
Total energy costs:
ElectricDom cold waterNatural gasOil
Total energy cost index:0
Million BTUs of energy per yearkBTU/sq. ft. per yearPer yearTotal Energy Cost
After‐hours usage/year ‐
Administration and Energy Conservation Measures (ECM) Survey
USI Checklist
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Month Year Water H2O / SewerUsage Cost Usage Cost Usage Cost Usage CostKWH $ Therms $ Units $ Gallons $
July 2008August 2008September 2008October 2008November 2008December 2008January 2009February 2009March 2009April 2009May 2009June 200912‐month total 0 0 0 $0.00 0 0
Square footage:CONVERSION TO BTU EQUIVALENTS
Fuel totals0 x 3,413 BTU/kWh 00 x 140,000 BTU/GAL. 00 x 100,000 BTU/THERM 0
Propane ‐ 0 x 92,000 BTU/GAL. 00
#DIV/0!#DIV/0!#DIV/0!
Fuel oil ‐ gallonsNatural gas ‐ Therms
ANNUAL ENERGY AND WATER CONSUMPTIONElectricity Natural Gas Other Fuels
Million BTU'skBTU/SF
0
Electricity ‐kWh
Per Sq. Ft.
Million BTU'sTotal energy useCost per million BTU
Million BTU's
Total Energy IndexTotal Cost Index
Million BTU's
Million BTU'sMillion BTU's
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2,232
2,119
1,955
1,7051,644
1,475 1,4761,426 1,401
1,774
2,0361,960
162
178172
165
137
124 126134
126
177 174180
0
20
40
60
80
100
120
140
160
180
200
0
500
1,000
1,500
2,000
2,500
Jul‐11 Aug‐11 Sep‐11 Oct‐11 Nov‐11 Dec‐11 Jan‐12 Feb‐12 Mar‐12 Apr‐12 May‐12 Jun‐12
Actual KW
kWh/Day
Average Electricity Usage and Demand
kWh/Day KW Demand
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Roof type (check one) B1. Metal Composite Membrane OtherRoof color (check one) Light Dark
B2.B3.B4.B5.B6.B7.
C1.C2.C3.C4.C5.C6.C7.C8.C9.C10.C11.C12.C13.
Is roof insulated?Are thermal windows used? Low‐e?
Are windows kept closed in conditioned spaces?
B. Building Envelope
Can l ighting be controlled in perimeter rooms to make use of day l ight?Have T‐12 fluorescent lamps been replaced with T‐8?
Is fluorescent task l ighting used to minimize background l ighting?
Have beverage and snack machine l ights been removed?
Are procedures in place to purchase the most energy efficient equipment?
Are overhangs present on east west facing windows?
Are interior shades present and adjusted to allow daylight and reject solar heat gain?
Have energy conservation decals been placed on l ight switches?
Are occupancy sensors util ized?Are computers using power‐save feature?Have all incandescent lamps been replaced by CFL's?Are all electric exit l ights of LED type?Do exterior l ights turn off during daylight hours?Have space heaters been eliminated?
Has High‐Bay T‐5 l ighting been evaluated for use in high ceiling areas (warehouses, gyms, auditoriums, etc.)?
C. Lighting and Electrical Systems
Is weather stripping on windows and doors present and maintained?
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K1.
1
2
3
4
Simple payback:
Simple payback:
Annual potential savings
Annual potential savings
Annual potential savingsCost to implement:Simple payback:
Cost to implement:
K. Recommendations
Cost to implement:Simple payback:
Annual potential savings
List top ECM recommendations (include estimated potential savings when possible). Indicate if building is a candidate for performance contracting.
Cost to implement:
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Detailed Assessment Report – Example Summary
Recommendation Cost Savings Investment Cost Payback Period
HVAC/Building Envelope
Set back, Set Forward Temperature Controls $5,257 $3,000 6.8 months
Variable Speed Air Handler Fan Drives $1,721 $3,175 1.8 years
Lighting
Reduced Lighting Levels $9/lamp/yr 0 Immediate
Motion Sensors $396 $1,231 3.1 years
Metal Halide Lamps $2,645 $1,922 8.7 months
LED Exit Lights $176 $70 4.7 months
T-12 Light Replacement $192 $700 3.6 Years
Computers
Sleep/Hibernate Controls $3,825 0 Immediate
Totals $14,212 $10,098 9.2 months
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Summary of Energy Benchmarks
Total Energy Consumed 1,597 Million Btu / yrTotal Energy Index 51.5 kBtu / sq ft / yrTotal Energy Cost: $33,615 / yrTotal Energy Cost Index: $1.08 / sq ft / yr
Estimated Annual Energy Savings, $/yrEnergy, Water & SW Savings $4,459Energy Savings
MMBTU / year kWh/yr
119.9632,500
Est. Annual Emissions Reductions, lbs/yrCarbon Dioxide (CO2)
1.19#CO2/kWh * 32,500kWh/yr = 38,675
Nitrogen Oxides ()0.00293#/kWh * 32,500kWh/yr =
95
Sulfur Oxides (SOX)0.00761#SOX * 32,500kWh/yr = 247
Detailed Assessment Report ‐ ExamplesSavings – Switching of hallway lights
Estimated hours lights could be switched off: Weekends hrs = 10 hrs/day X 2 days X 52 weeks = 1,040 hrs. Schools out hours = 10 hrs/day X 5 days X 10 weeks = 500 hrs. Total hours = 1,040 + 500 = 1,540 hrs. Cost Savings = 3 hallways X 23 fixtures X 75% switched off X .112 kwd/fixture X 1,540 hrs/year = 8,926 kWh X $.084 kWh = $750 Yr.
Costs
Costs = TBD. A very rough estimate is $400 per hallway, or $800.
Payback Period = $800/$750 = 13 months
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Energy Audit in Action
• Town of Lee, MA Water Treatment Plant
• Audits focused on energy use, fuel use, solar potential, and wind potential
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Energy Audit In Action
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Energy Audit in Action
• Audit of wastewater treatment plant at Waimea, Kauai County, HI
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