Establishing a Baseline, Energy Audits and Energy Star s Portfolio Manager Glenn Barnes Environmental Finance Center University of North Carolina at Chapel Hill 919-962-2789 glennbarnes@sog.unc.edu
Energy Efficiency Premise: Energy Costs are not Fixed Costs Energy expenses offer large investment opportunity Not addressing these opportunities is costly Comprehensive projects yield substantial $ savings Where to begin?
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
Assessing Energy Performance What is a Benchmark? A standardized, comparable metric of whole building energy performance.
Why Benchmark? 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
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
Energy Benchmarking Building age is not an indicator of energy use.
Comparative Metric Is 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
National Energy Performance Rating System The rating system overlays a 1 to 100 scale over national data, giving relative meaning to energy use 1 Energy Performance Rating 25 50 75 100 Highest Energy Use Lowest
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
ENERGY STAR Who here has heard of ENERGY STAR? What do you know about this program?
What is ENERGY STAR? 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
ENERGY STAR Continued 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 Portfolio Manager
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
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. 8/29/2013
With Portfolio Manager, you can Track multiple energy and water meters, pumps, motors, and other equipment for each facility 8/29/2013 Monitor energy and water costs, viewing percent improvement across time.
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
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
Portfolio Manager New version of Portfolio Manager debuted on July 17
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Portfolio Manager Resources Webcats: https://esbuildings.webex.com/mw0307l/m ywebex/default.do?siteurl=esbuildings User guides: http://www.energystar.gov/buildings/trainin g
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
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
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
Smart Management for Small Water Systems 8/29/2013 Portfolio Manager in Action
Energy Audits Energy management is not just a free lunch energy management is the lunch that someone pays you to eat! Mary Tiger
Energy Audits Expert advice on what energy improvements you can conduct for your water system and your business at large
Have you had an energy audit previously?
USI Checklist 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: Administration and Energy Conservation Measures (ECM) Survey # of floors # of occupants Hrs. occupied per week Utilities supplied to bldg. (Enter 1 if present, 2 if present and metered): Electric Dom cold water Natural gas Oil Propane Steam Heating hot water Chilled water Surveyor Name: Dom hot water Team: Survey Date: Client Please complete the top Survey Time: of this page and pages 2 and 3 8/29/2013 The section below is completed by WRP assessor. Baseline Energy Data (See Annual Energy Consumption Worksheet): Total energy consumed: 0 Million BTUs of energy per year Total energy index: #DIV/0! kbtu/sq. ft. per year Total energy costs: $0.00 Per year Total energy cost index: #DIV/0! Total Energy Cost Total water use: 0 Gallons per year Water/sewer cost: $0.00 Per year Gallons per Occupant: #DIV/0! Gallons / sf #DIV/0! After hours usage/year After hours usage/year
ANNUAL ENERGY AND WATER CONSUMPTION Month Year Electricity Natural Gas Other Fuels Water H 2 O / Sewer Usage Cost Usage Cost Usage Cost Usage Cost KWH $ Therms $ Units $ Gallons $ July 2008 August 2008 September 2008 October 2008 November 2008 December 2008 January 2009 February 2009 March 2009 April 2009 May 2009 June 2009 12 month total 0 0 0 $0.00 0 0 Square footage: 0 CONVERSION TO BTU EQUIVALENTS Fuel totals Electricity kwh 0 x 3,413 BTU/kWh 0 Million BTU's Fuel oil gallons 0 x 140,000 BTU/GAL. 0 Million BTU's Natural gas Therms 0 x 100,000 BTU/THERM 0 Million BTU's Propane 0 x 92,000 BTU/GAL. Total energy use 0 0 Million BTU's Million BTU's Cost per million BTU Total Energy Index Total Cost Index #DIV/0! #DIV/0! #DIV/0! Million BTU's kbtu/sf Per Sq. Ft.
2,500 Average Electricity Usage and Demand 200 2,000 1,500 2,232 162 2,119 178 1,955 172 165 1,705 1,644 137 1,475 1,476 124 126 134 1,426 1,401 126 177 1,774 2,036 174 180 1,960 180 160 140 120 kwh/day 100 Actual KW 1,000 80 60 500 40 20 0 Jul 11 Aug 11 Sep 11 Oct 11 Nov 11 Dec 11 Jan 12 Feb 12 Mar 12 Apr 12 May 12 Jun 12 0 kwh/day KW Demand
B. Building Envelope Roof type (check one) B1. Metal Composite Membrane Other Roof color (check one) Light Dark B2. Is roof insulated? B3. B4. B5. B6. B7. Are thermal windows used? Low e? Are overhangs present on east west facing windows? Is weather stripping on windows and doors present and maintained? Are interior shades present and adjusted to allow daylight and reject solar heat gain? Are windows kept closed in conditioned spaces? C. Lighting and Electrical Systems C1. C2. C3. C4. C5. C6. C7. C8. C9. C10. C11. C12. C13. Can lighting be controlled in perimeter rooms to make use of day light? Have T 12 fluorescent lamps been replaced with T 8? Are occupancy sensors utilized? Are computers using power save feature? Have all incandescent lamps been replaced by CFL's? Are all electric exit lights of LED type? Do exterior lights turn off during daylight hours? Have space heaters been eliminated? Have beverage and snack machine lights been removed? Are procedures in place to purchase the most energy efficient equipment? Is fluorescent task lighting used to minimize background lighting? Has High Bay T 5 lighting been evaluated for use in high ceiling areas (warehouses, gyms, auditoriums, etc.)? Have energy conservation decals been placed on light switches?
K. Recommendations 8/29/2013 List top ECM recommendations (include estimated potential savings when possible). Indicate if building is a candidate for performance contracting. K1. 1 Annual potential savings Cost to implement: Simple payback: 2 Annual potential savings Cost to implement: Simple payback: 3 Annual potential savings Cost to implement: Simple payback: 4 Annual potential savings Cost to implement: Simple payback:
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
Detailed Assessment Report Examples 8/29/2013 Savings 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 Estimated Annual Energy Savings, $/yr Energy, Water & SW Savings $4,459 Energy Savings MMBTU / year kwh/yr 119.96 32,500 Est. Annual Emissions Reductions, lbs/yr Carbon Dioxide (CO 2 ) 1.19#CO 2 /kwh * 32,500kWh/yr = Nitrogen Oxides () 0.00293#/kWh * 32,500kWh/yr = Sulfur Oxides (SO X ) 0.00761#SO X * 32,500kWh/yr = 38,675 95 247 Summary of Energy Benchmarks Total Energy Consumed Total Energy Index Total Energy Cost: Total Energy Cost Index: 1,597 Million Btu / yr 51.5 kbtu / sq ft / yr $33,615 / yr $1.08 / sq ft / yr
Energy Audit in Action Town of Lee, MA Water Treatment Plant Audits focused on energy use, fuel use, solar potential, and wind potential
Energy Audit In Action
Energy Audit in Action Audit of wastewater treatment plant at Waimea, Kauai County, HI
8/29/2013
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