Transcript Slide 1

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
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AU Office of Sustainability: Vision
Strategic Plan Goal #7:
“Act on our values through
social responsibility and …
an active pursuit of
sustainability...”
3
Driving Frameworks
ACUPCC
LEED
STARS
Carbon Neutral
by 2020
Certify 25
Existing
Buildings
Achieve a
Platinum
Rating
Mayor’s
College &
University
Sustainability
Pledge
Comprehensive Sustainability Plan
4
Climate Action Plan
Reduce Consumption
Produce Renewable Energy on Campus
Purchase Renewable Energy
Purchase Offsets
5
AU Greenhouse Gas Emissions
70,000
60,000
50,000
Total Emissions
Net Emissions
Purchased Electricity
40,000
Study Abroad Air Travel
Natural Gas
MTCO2e
30,000
Faculty / Staff Commuting
Directly Financed Air Travel
20,000
Student Commuting
Scope 2 T&D Losses
Direct Transportation
10,000
Paper Purchasing
Refrigerants & Chemicals
0
2005
2006
2007
2008
2009
2010
2011
2012
Solid Waste
Agriculture
-10,000
Campus Trees
RECs
-20,000
-30,000
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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
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LEED Checklist – Existing Buildings
LEED 2009 for Existing Buildings: Operations & Maintenance
Project Name
Projec t Chec klist
Sustainable Sites
Y
?
Date
Possible Points:
26
Materials and Resources, Continued
N
Y
Credit 1
Credit 2
Credit 3
Credit 4
Credit 5
Credit 6
Credit 7.1
Credit 7.2
Credit 8
LEED Certified Design and Construction
4
Building Exterior and Hardscape Management Plan
1
I ntegrated Pest Mgmt, Erosion Control, and Landscape Mgmt Plan
1
Alternative Commuting Transportation
3 to 15
Site Development—Protect or Restore Open Habitat
1
Stormwater Quantity Control
1
Heat I sland Reduction—Non-Roof
1
Heat I sland Reduction—Roof
1
Light Pollution Reduction
1
Water Efficiency
Possible Points:
14
?
N
Credit 6
Credit 7
Credit 8
Credit 9
Prereq 1
Credit 1
Credit 2
Credit 3
Credit 4
Minimum I ndoor Plumbing Fixture and Fitting Efficiency
Water Performance Measurement
Additional I ndoor Plumbing Fixture and Fitting Efficiency
Water Efficient Landscaping
Cooling Tower Water Management
Y
Y
Y
Prereq 1
Prereq 2
Prereq 3
Credit 1.1
Credit 1.3
1
1
1
1
to
to
to
to
2
5
5
2
Credit 1.4
Credit 1.5
Credit 2.1
Credit 2.2
Credit 2.3
Energy and Atmosphere
Possible Points:
35
Credit 2.4
Credit 3.1
Y
Y
Y
Prereq 1
Prereq 2
Prereq 3
Credit 1
Credit 2.1
Credit 2.2
Credit 2.3
Credit 3.1
Credit 3.2
Credit 4
Credit 5
Credit 6
Energy Efficiency Best Management Practices
Minimum Energy Efficiency Performance
Fundamental Refrigerant Management
Optimize Energy Efficiency Performance
Existing Building Commissioning—I nvestigation and Analysis
Existing Building Commissioning—I mplementation
Existing Building Commissioning—Ongoing Commissioning
Performance Measurement—Building Automation System
Performance Measurement—System-Level Metering
On-site and Off-site Renewable Energy
Enhanced Refrigerant Management
Emissions Reduction Reporting
Credit 3.2
Credit 3.3
Credit 3.4
1 to 18
2
2
2
1
1 to 2
1 to 6
1
1
Credit 3.5
Credit 3.6
Y
Y
Prereq 1
Prereq 2
Credit 1
Credit 2.1
Credit 2.2
Credit 3
Credit 4
Credit 5
Possible Points:
Sustainable Purchasing Policy
Solid Waste Management Policy
Sustainable Purchasing—Ongoing Consumables
Sustainable Purchasing—Electric
Sustainable Purchasing—Furniture
Sustainable Purchasing—Facility Alterations and Additions
Sustainable Purchasing—Reduced Mercury in Lamps
Sustainable Purchasing—Food
C er t i f i ed 4 0 t o 4 9 p o i nt s
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Management—Waste Stream Audit
Management—Ongoing Consumables
Management—Durable Goods
Management—Facility Alterations and Additions
Credit 1.1
Credit 1.2
Credit 1.3
Credit 1.4
Credit 3
Si l ver 50 t o 59 p o i nt s
Credit 1.1
Credit 1.2
Credit 1.3
Credit 1.4
15
1
1
I AQ Best Mgmt Practices—Outdoor
I AQ Best Mgmt Practices—I ncreased Ventilation
1
I AQ Best Mgmt Practices—Reduce Particulates in Air Distribution1
I AQ Mgmt Plan—I AQ Mgmt for Facility Alterations and Additions 1
Occupant Comfort—Occupant Survey
1
Controllability of Systems—Lighting
1
Occupant Comfort—Thermal Comfort Monitoring
1
Daylight and Views
1
Green Cleaning—High Performance Cleaning Program
1
Green Cleaning—Custodial Effectiveness Assessment
1
Green Cleaning—Sustainable Cleaning Products, Materials Purchases
1
Green Cleaning—Sustainable Cleaning Equipment
1
Green Cleaning—I ndoor Chemical and Pollutant Source Control 1
Green Cleaning—I ndoor I ntegrated Pest Management
1
Possible Points:
I nnovation in Operations: Specific Title
I nnovation in Operations: Specific Title
I nnovation in Operations: Specific Title
I nnovation in Operations: Specific Title
LEED Accredited Professional
Documenting Sustainable Building Cost I mpacts
Regional Priority Credits
1
1
1
1
1
1
Possible Points:
1
1
1
1
Minimum I AQ Performance
Environmental Tobacco Smoke (ETS) Control
Green Cleaning Policy
I AQ Best Mgmt Practices—I AQ Management Program
Innovation in Operations
Credit 2
Materials and Resources
Waste
Waste
Waste
Waste
Indoor Environmental Quality
Credit 1.2
Y
Solid
Solid
Solid
Solid
Regional Priority:
Regional Priority:
Regional Priority:
Regional Priority:
Specific
Specific
Specific
Specific
Total
G o l d 6 0 t o 79 p o i nt s
Possible Points:
Credit
Credit
Credit
Credit
1
1
1
1
1
1
4
1
1
1
1
Possible Points:
Pl at i num 8 0 t o 110
6
110
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
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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
Current Usage (12 months ending June 2012) 18,327,876
LEED Prerequisite
9,895,166
Savings Needed to Meet Prerequisite (kBtu)
8,432,710
Savings Needed to Meet Prerequisite (%)
Site EUI
(kBtu/sf)
Source EUI
(kBtu/sf)
155.4
357.3
83.9
193
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
4.7
Demand controlled ventilation w/CO2
sensors
2,838,079
$29,600 $ 10,455
2.8
286,042
$39,370 $
8,554
4.6
Occupancy Sensors in Offices
14,704
$11,800 $
1,900
6.2
Lighting Setback, Unoccupied Times
14,591
$10,725 $
4,467
2.4
$482,345 $ 123,560
3.9
Replace AHU-3 with a VAV System
All ECMs Combined*
% of current energy use
8,241,456
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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Bender Library Performance After
Have since completed relighting/delamping
project in Library for additional low-cost
savings
On target to meet prerequisite pending
improvements
Total kBtu
Current Usage (12 months ending June 2012)
LEED Prerequisite
Savings identified in audit
New total
% savings still needed
Site EUI
(kBtu/sf)
Source EUI
(kBtu/sf)
18,327,876
155.4
357.3
9,895,166
8,241,456
83.9
193
10,086,420
85.5
196.6
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 average
Total
(kBtu/year)
Site EUI
(kBtu/sf)
Current usage (12 months ending 12/12)
27,854,037
224.7
456.1
LEED Prerequisite
23,017,416
186
382
Savings Needed to Meet Prerequisite (kBtu)
4,836,621
17%
Savings Needed to Meet Prerequisite (%)
Source EUI
(kBtu/sf)
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Katzen Energy Savings
 ASHRAE Level II Audit Identified ECMs:
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
1,742,191
$123,520
$17,074
7.6
76,501
$5,500
$3,475
2.4
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
67,151
$29,260
$8,555
3.4
5,549,703
$707,859
$131,908
5.4
Summertime Condensing Boiler
Chilled Water Temperature Reset
Supply Air Fan Static Pressure Reset
Daylighting
All ECMs Combined*
% 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.
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Katzen Art Center Performance After
Identified ECMs together reduce
consumption to LEED prerequisite level
Katzen would qualify for 1 additional LEED
point with new total
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
186
382
Savings identified in audit
23,017,416
5,549,703
New total
22,304,334
180
365
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Target Campus Energy Use*
Annual Energy Use Targets
250,000
228,793
LEED compliance level
= 69th percentile
200,000
178,930
161,839
150,000
MMBTU
134,443
104,434
100,000
97,823
50,000
0
Fiscal Year 2013
2014
2015
2016
2017
2018
* 25 targeted existing buildings.
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Target Annual Cost Savings1
Annual Projected Cost Savings
$3,000,000
$2,428,635
$2,500,000
$2,281,082
$2,000,000
$1,521,314
$1,500,000
$896,077
$1,000,000
$500,000
$240,863 2
$-
Fiscal Year 2014
2015
2016
2017
2018
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targeted existing buildings.
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.
2Assumes
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Financing Options
1. Invest $8-$10M, 8-10 yr payback
a. $3.3M/yr for 3 yrs
b. Increase energy project funding from
$700k/yr to $1.7/yr for 6 years
i. 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!

[email protected]

www.american.edu/sustainability

Twitter.com/GreenAU

facebook.com/GreenAU
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