Building Metering & Benchmarking: It’s Worth the Energy American University
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Building Metering & Benchmarking: It’s Worth the Energy American University Emily Curley, Sustainability Coordinator Chris O’Brien, Director of Sustainability April 16, 2013
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Building Metering & Benchmarking: It’s Worth the Energy American University Emily Curley, Sustainability Coordinator Chris O’Brien, Director of Sustainability April 16, 2013. AU Office of Sustainability: Staff. AU Office of Sustainability: Vision . Strategic Plan Goal #7: - PowerPoint PPT Presentation
Transcript of Building Metering & Benchmarking: It’s Worth the Energy American University
Building Metering & Benchmarking: It’s Worth the EnergyAmerican University
Emily Curley, Sustainability CoordinatorChris O’Brien, Director of Sustainability
April 16, 2013
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AU Office of Sustainability: Staff
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Strategic Plan Goal #7:“Act on our values through social responsibility and …
an active pursuit of sustainability...”
AU Office of Sustainability: Vision
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ACUPCCCarbon
Neutral by 2020
LEED Certify 25 Existing
Buildings
STARSAchieve a Platinum
Rating
Mayor’s College & University
Sustainability Pledge
Comprehensive Sustainability Plan
Driving Frameworks
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Climate Action Plan
Reduce Consumption
Produce Renewable Energy on Campus
Purchase Renewable Energy
Purchase Offsets
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AU Greenhouse Gas Emissions
2005 2006 2007 2008 2009 2010 2011 2012
-30,000
-20,000
-10,000
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
Total EmissionsNet EmissionsPurchased ElectricityStudy Abroad Air TravelNatural GasFaculty / Staff CommutingDirectly Financed Air TravelStudent CommutingScope 2 T&D LossesDirect TransportationPaper Purchasing Refrigerants & ChemicalsSolid WasteAgricultureCampus TreesRECs
MTC
O2e
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Benefits of Increasing Energy Savings Comply with DC Green Building Act Reduce utility costs (electric, gas, water,
chemical) Reduce operations & maintenance (labor,
equipment) Reduce reliance on RECs and Offsets Fulfill Presidents Climate Commitment Improve occupant comfort Earn LEED recognition
LEED Checklist – Existing BuildingsLEED 2009 for Existing Buildings: Operations & Maintenance Project NameProject Checklist Date
Possible Points: 26Y ? N Y ? N
Credit 1 4 Credit 6 1Credit 2 1 Credit 7 1Credit 3 1 Credit 8 Solid Waste Management—Durable Goods 1Credit 4 3 to 15 Credit 9 Solid Waste Management—Facility Alterations and Additions 1Credit 5 1Credit 6 1 Possible Points: 15Credit 7.1 1Credit 7.2 1 Y Prereq 1 Credit 8 1 Y Prereq 2
Y Prereq 3Possible Points: 14 Credit 1.1 IAQ Best Mgmt Practices—IAQ Management Program 1
Credit 1.2 IAQ Best Mgmt Practices—Outdoor 1Y Prereq 1 Credit 1.3 IAQ Best Mgmt Practices—Increased Ventilation 1
Credit 1 1 to 2 Credit 1.4 IAQ Best Mgmt Practices—Reduce Particulates in Air Distribution1Credit 2 1 to 5 Credit 1.5 IAQ Mgmt Plan—IAQ Mgmt for Facility Alterations and Additions 1Credit 3 1 to 5 Credit 2.1 Occupant Comfort—Occupant Survey 1Credit 4 1 to 2 Credit 2.2 Controllability of Systems—Lighting 1
Credit 2.3 Occupant Comfort—Thermal Comfort Monitoring 1Possible Points: 35 Credit 2.4 Daylight and Views 1
Credit 3.1 Green Cleaning—High Performance Cleaning Program 1Y Prereq 1 Energy Efficiency Best Management Practices Credit 3.2 Green Cleaning—Custodial Effectiveness Assessment 1Y Prereq 2 Credit 3.3 Green Cleaning—Sustainable Cleaning Products, Materials Purchases1Y Prereq 3 Credit 3.4 Green Cleaning—Sustainable Cleaning Equipment 1
Credit 1 1 to 18 Credit 3.5 Green Cleaning—Indoor Chemical and Pollutant Source Control 1Credit 2.1 2 Credit 3.6 Green Cleaning—Indoor Integrated Pest Management 1Credit 2.2 2Credit 2.3 2 Possible Points: 6Credit 3.1 1Credit 3.2 1 to 2 Credit 1.1 1Credit 4 1 to 6 Credit 1.2 1Credit 5 Enhanced Refrigerant Management 1 Credit 1.3 1Credit 6 Emissions Reduction Reporting 1 Credit 1.4 1
Credit 2 1Possible Points: 10 Credit 3 1
Y Prereq 1 Possible Points: 4Y Prereq 2
Credit 1 1 Credit 1.1 1Credit 2.1 1 Credit 1.2 1Credit 2.2 1 Credit 1.3 1Credit 3 1 Credit 1.4 1Credit 4 1Credit 5 1 Possible Points: 110
LEED Accredited Professional
Minimum Energy Efficiency Performance
Certified 40 to 49 points Silver 50 to 59 points Gold 60 to 79 points Platinum 80 to 110
Optimize Energy Efficiency PerformanceExisting Building Commissioning—Investigation and Analysis
Energy and Atmosphere
Innovation in OperationsExisting Building Commissioning—ImplementationExisting Building Commissioning—Ongoing Commissioning
Solid Waste Management Policy
Materials and Resources
Green Cleaning Policy
Indoor Environmental Quality
Minimum IAQ PerformanceEnvironmental Tobacco Smoke (ETS) Control
Minimum Indoor Plumbing Fixture and Fitting EfficiencyWater Performance Measurement
Innovation in Operations: Specific TitleInnovation in Operations: Specific Title
Performance Measurement—Building Automation System
Heat Island Reduction—Non-RoofHeat Island Reduction—RoofLight Pollution Reduction
Sustainable Sites
Integrated Pest Mgmt, Erosion Control, and Landscape Mgmt Plan
LEED Certified Design and ConstructionBuilding Exterior and Hardscape Management Plan
Alternative Commuting Transportation
Sustainable Purchasing—Food
Sustainable Purchasing—ElectricSustainable Purchasing—Furniture
Site Development—Protect or Restore Open Habitat
Materials and Resources, Continued
Solid Waste Management—Waste Stream AuditSolid Waste Management—Ongoing Consumables
Water Efficiency
Performance Measurement—System-Level Metering
Stormwater Quantity Control
Sustainable Purchasing Policy Regional Priority Credits
Total
Sustainable Purchasing—Facility Alterations and Additions
Regional Priority: Specific CreditRegional Priority: Specific CreditRegional Priority: Specific Credit
Sustainable Purchasing—Reduced Mercury in Lamps
Sustainable Purchasing—Ongoing Consumables
Innovation in Operations: Specific TitleInnovation in Operations: Specific Title
Regional Priority: Specific Credit
Fundamental Refrigerant Management
Additional Indoor Plumbing Fixture and Fitting EfficiencyWater Efficient Landscaping Cooling Tower Water Management
Documenting Sustainable Building Cost Impacts
On-site and Off-site Renewable Energy
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Energy Efficiency & Occupant Comfort
Studies1 show that Energy Star rated & LEED certified buildings: Increase productivity by 1%-5% Increase employee morale Reduce turnover Improve recruitment Reduce allergic reactions and stress
1 CBRE & University of San Diego, 2009; McGraw-Hill, 2009; Michigan State, 2009; http://www.institutebe.com/Existing-Building-Retrofits/Productivity-Gains-from-Energy-Efficiency.aspx
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Energy Saving Strategies
Install meters 25 ASHRAE level I audits $1.2m energy-saving projects complete
Library Lighting Butler Tunnel Lighting Arena Lighting
ASHRAE level II audits: Bender Library, Katzen, MGC, Sports Center, Ward Circle
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Case Study: Bender Library 117,940 gsf with electricity, district steam & chilled
water, solar PV 5th largest energy using building on campus
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Case Study: Bender Library Results not so encouraging… LEED requires ENERGY STAR score of 19 or
source EUI 19% better than national average
Total kBtu Site EUI (kBtu/sf)
Source EUI (kBtu/sf)
Current Usage (12 months ending June 2012)
18,327,876 155.4 357.3
LEED Prerequisite 9,895,166 83.9 193Savings Needed to Meet Prerequisite (kBtu) 8,432,710Savings Needed to Meet Prerequisite (%) 46%
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Bender Library Energy Savings ASHRAE Level II Audit Identified ECMs:
Project Annual kBtu Savings
Cost Annual Savings
Simple Payback (years)
Install VFDs for 40% Minimum Airflow 6,303,804 $390,850 $ 83,165 4.7Demand controlled ventilation w/CO2 sensors 2,838,079 $29,600 $ 10,455 2.8
Replace AHU-3 with a VAV System 286,042 $39,370 $ 8,554 4.6Occupancy Sensors in Offices 14,704 $11,800 $ 1,900 6.2Lighting Setback, Unoccupied Times 14,591 $10,725 $ 4,467 2.4All ECMs Combined* 8,241,456 $482,345 $ 123,560 3.9
% of current energy use 45%*Simply summing all the savings for each measure would not accurately represent the savings that would be seen if all measures were implemented.
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Have since completed relighting/delamping project in Library for additional low-cost savings
On target to meet prerequisite pending improvements
Bender Library Performance After
Total kBtu Site EUI (kBtu/sf)
Source EUI (kBtu/sf)
Current Usage (12 months ending June 2012) 18,327,876 155.4 357.3 LEED Prerequisite 9,895,166 83.9 193Savings identified in audit 8,241,456
New total 10,086,420 85.5 196.6% savings still needed 2%
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Case Study: Katzen Arts Center 3rd largest energy using building on campus 335,476 gsf with electricity, natural gas, solar PV Large parking garage = 60% of total area
Museum and performance space = 20% Art “lab” space = 10%
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Case Study: Katzen Arts Center Special case for LEED given difficulty of
comparison with other buildings LEED requires source EUI 19% better than 3
year historical baseline averageTotal (kBtu/year)
Site EUI (kBtu/sf)
Source EUI (kBtu/sf)
Current usage (12 months ending 12/12) 27,854,037 224.7 456.1 LEED Prerequisite 23,017,416 186 382Savings Needed to Meet Prerequisite (kBtu) 4,836,621Savings Needed to Meet Prerequisite (%) 17%
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Project Annual kBtu Savings
Cost Annual Savings
Simple Payback
Free Cooling w/ Plate & Frame Heat Exchanger 273,523 $163,846 $11,958 8.4
Variable Primary Chilled Water Pumping 500,001 $87,113 $21,882 4.0
Ice Storage 321,025 $160,810 $23,989 6.7
Summertime Condensing Boiler 1,742,191 $123,520 $17,074 7.6
Chilled Water Temperature Reset 76,501 $5,500 $3,475 2.4
Supply Air Fan Static Pressure Reset 927,511 $5,500 $23,785 0.2
Rebalance to Lower Airflows 1,991,757 $28,000 $48,421 0.6
Solar Thermal Heating Water 1,474,150 $104,310 $15,626 6.7
Daylighting 67,151 $29,260 $8,555 3.4
All ECMs Combined* 5,549,703 $707,859 $131,908 5.4
% of current energy use 19.9%*Simply summing all the savings for each measure would not accurately represent the savings that would be seen if all measures were implemented.
Katzen Energy Savings ASHRAE Level II Audit Identified ECMs:
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Identified ECMs together reduce consumption to LEED prerequisite level
Katzen would qualify for 1 additional LEED point with new total
Katzen Art Center Performance After
Total kBtu Site EUI (kBtu/sf)
Source EUI (kBtu/sf)
Current usage (12 months ending 12/12) 27,854,037 224.7 456.1 LEED Prerequisite 23,017,416 186 382Savings identified in audit 5,549,703
New total 22,304,334 180 365
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Target Campus Energy Use*
LEED compliance level = 69th percentile
* 25 targeted existing buildings.
2013 2014 2015 2016 2017 20180
50,000
100,000
150,000
200,000
250,000
228,793
178,930
161,839
134,443
104,43497,823
Annual Energy Use Targets
MM
BTU
Fiscal Year
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Target Annual Cost Savings1
125 targeted existing buildings.2Assumes savings in proportion to current electric/gas consumption (56% electric/44% gas). Total savings range is based on splitting savings from 33% electric & 67% gas, to 67% electric & 33% gas.
2014 2015 2016 2017 2018 $-
$500,000
$1,000,000
$1,500,000
$2,000,000
$2,500,000
$3,000,000
$240,863
$896,077
$1,521,314
$2,281,082 $2,428,635
Annual Projected Cost Savings
Fiscal Year
2
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Financing Options
1. Invest $8-$10M, 8-10 yr paybacka. $3.3M/yr for 3 yrsb. Increase energy project funding from
$700k/yr to $1.7/yr for 6 yearsi. Consider revolving fund
2. Third Party Financing – $0 cost to AU but cost savings are minimized
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Next Steps
- RFQ for energy conservation measures- Determine financing & contracting
approach- RFPs for design & construction- Finalize contracts & financing- Implement projects
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Lessons Learned Building-level metering is teaching us which
buildings consume the most energy and cost the most to operate
Energy benchmarking is teaching us which buildings are the most inefficient relative to buildings like it
Energy auditing is teaching us that making investments in energy efficiency are often financially prudent and allow us to meet our environmental goals
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Thank you!
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