Transcript Presentation (PPTX 4.1 Mb)

Best Practices In Energy Management
Educational Facilities Conference
September 30, 2011
Presented by
Joseph Sorbet
Director of Engineering
Fifth Street Management Company
And
Harry L. Conley
CEO
Seven Oaks Company
Harry Conley, CEO, Seven Oaks Company
Mr. Conley’s career spans over 30 years in the commercial real estate industry.He has held executive level positions with
national real estate firms including Trammell Crow, Prentiss Properties, and Hines where his
responsibilities included
the management of real estate portfolios in excess of 10 million square feet.Founding Fifth Street Management Company in
Atlanta, GA in 2002, Fifth Street managed over 5 million square feet of Class “A” office, corporate facilities and residential
assets employing over 100 persons.Mr. Conley’s experience includes the opening of over 7 million square feet of commercial
office assets in cities across the United States.As CEO he guided the establishment of the Fifth Street brand as a leader in
sustainable program implementation and was a recognized leader in energy reduction strategy development and LEED
certification.He is a graduate of Texas State University and has obtained the Certified Property Manager (CPMÒ)
designation from the Institute of Real Estate Management, National Board of Realtors.
Joe Sorbet, Corporate Director of Engineering, Fifth Street Management
Mr. Sorbet’s career spans over 27 years in the commercial real estate industry. He has held engineering positions with national
real estate firms including Hines, ING Clarion Realty Services, and Affiliated Building Services Inc. His experience includes
Shift Supervisor over thirteen personnel at the six million plus square feet of Hartsfield Jackson International Airport, Chief
Engineer of the 300,000 square feet Crystal Springs Headquarters in Sandy Springs (ING Clarion) and the 510,000 square feet
Riverwood 100 in North Atlanta (ING Clarion).
Parking Deck
Lighting Retrofit Example
Current
Fixture
Type
175 w
metal-hal
175 w
metal-hal
Proposed
Retrofit
Description
Total
Annual
Savings
Payback
Years
$2,090
$45,260
1.43
$7,400
$285
$7,685
1.69
$50,569
$2,376
$52,945
1.47
Quantity
Total
Price
Each
Total
Project
Cost
Electric Utility
Savings
Lamp/Ballast
Maintenance
Savings
2 lamp T8 vapor
440
$147
$64,680
$43,169
2 lamp T8 vapor w/
photo cell
60
$217
$13,020
$77,700
Total
500
Common Area
Lighting Control
Relay In a Box with
Echelon chip
(LonTalk)
24VAC output to
lighting relays
120/24VAC
Transformer
Occupancy
Sensors In
Restrooms
Opportunities For
Daylight Harvesting
Exterior Stairwell
Student Center
Opportunities For
Electric Utility
Reduction
Day Cleaning
Re-Commissioning
“…systematic process for…optimizing the performance of building systems…
…the goal is to make building systems perform to meet the current facility
requirements…and to support improvement of systems performance over
Time”……….Building Commissioning Association
Re-Commissioning
Benefits
1. Return equipment to original operational intent
2. Verify operating efficiency per design
3. Ensure building codes are maintained
4. Provides thorough inspection of systems
5. Ensures systems are configured optimally
6. Provides for optimal energy conservation
7. Provides for optimal occupant comfort
8. Facilitates obtainment of LEED certification
Re-Commissioning
Systems Affected
1.
2.
3.
4.
HVAC
•
•
•
•
VAV/PIU
Cooling Tower
Pumps/Fans
AHUs
Controls Optimization
•
Start/Stop
•
Pre-conditioning
•
Set points
•
Occupancy schedules
Reset Schedules
•
Provides responses to variables
 Outside air temp
 Return air temp
 Chilled water return temp
•
AHU discharge air temp
•
Chilled water supply temp
•
AHU supply duct static pressure
Test and balance
•
Design flow rates
•
Reduce fan and pump energy use
Indoor Environmental Quality
•
Ventilation (Fresh Air)

ASHRAE 62.1

CO2 Sensors

Ventilation without CO2 sensors

Fresh air fan modulation

Efficiencies gained
Fresh Air Fan Modulation
18000
12.00
11.25
11.25
11.25
11.25
16000
11.25 kW
16000 CFM
10.00
14000
14000 CFM
12000
Constant volume operates
at 100% capacity while
demand control matches
load as measured by
locally mounted CO2
sensors.
8.00
7.54 kW
10000
10000 CFM
Volume of Air
6.00
8000
Constant Volume
7000 CFM
6000
4000
4.00
2.75 kW
4000CFM
2.00
2000
0.94 kW
0
0.18 kW
VFD in use
0.00
Fresh Air Fan Modulation
18000
12.00
11.25 kW
10.13 kW
16000
16000 CFM10.00
9.00 kW
14000
14000 CFM
7.88 kW
12000
VFD technology employed
in a variable volume system
allows the supply to more
closely match the demand
producing maximum savings.
8.00
7.54 kW
6.75 kW
10000
10000 CFM
Volume of Air
6.00
8000
VFD in use
No VFD
7000 CFM
6000
4000
4.00
2.75 kW
4000CFM
2.00
2000
0.94 kW
0
0.18 kW
0.00
Maintenance
• Preventive Maintenance
 Reduce energy consumption by
 Changing filters based on pressure drop
 Properly tensioning belts
 Cleaning air-side cooling coils
 Proper lubrication
 Maintaining drip pans
 Ensuring proper water chemistry
Water Treatment Station
Maintenance
Air-Coils Blocked
Maintenance
The Impact of
Scaling on Energy Consumption
Maintenance
The Impact of
Scaling on Energy Consumption
Benchmarking
• Benefits
 Establishes baseline for measurement
 Measures effectiveness of ECMs
 Facilitates communication/education with stakeholders
 Quantifies financial benefits of ECMs
 Supports requests for capital improvements
Useful Links / Resources
• USGBC – www.usgbc.org
• Building Commissioning Assoc. – www.bcxa.org
• The Center for Green Schools – www.climateneutralcampus.com
• Assoc. for the Advancement of Sustainability in Higher Education www.aashe.org
• Environmental Protection Agency – www.epa.gov
• American College and University President’s Climate Commitment www.presidentsclimatecommitment.org
• Campus Green Builder – www.campusgreenbuilder.org