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