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UAB FACILITIES ENERGY MANAGEMENT
UAB FACILITIES DIVISION ENERGY MANAGEMENT DEPARTMENT
ENERGY MANAGEMENT DEPARTMENT FACILITIES SUPPORT BUILDING 822 UNIVERSITY BOULEVARD BIRMINGHAM, ALABAMA 35294 www.fab.uab.edu/energy 975-7140
The following energy conserving standards have been established for new construction and renovations of existing buildings: Improved insulation Energy efficient windows Energy efficient HVAC control systems Energy efficient lighting Improved lighting controls LED exit signs Compact Fluorescent lamps in blue Help lights Sustainable Building Design Checklist
Building Setbacks During Unoccupied Times
Weekends, Nights, & Holidays Summer Mode: Setback at 85°F
Winter Mode: Setback at 55°F Wall Switch Occupancy Sensor
Estimated Annual Savings of $1.5 Million
Presently 46 UAB buildings are being setback nightly and during holidays. Occupancy lighting sensors have also been introduced to reduce air exchanges in labs during unoccupied times (Kaul, BMR2, Shelby, North Pavilion OR Rooms).
FLUORESCENT LIGHTING UPGRADES Over the last three years over 70,000 fluorescent lamps were upgraded from T-12* lamps to a more energy efficient T-8* lamps saving over 420,000 kWh’s of electricity and $400k annually.
A typical energy efficient 2-lamp, T-8 fluorescent lighting upgrade – 616 Building
Fluorescent light fixture with two T-8 lamps, reflective panels, and electronic ballast installed
Fact: 25 watt T-8’s are $1 more than 32 watt versions and save $4-7/year at near same lumens (* Lamp Tube Diameter Size Designation: T-12’s are 12/8”/1.50”, T-8’s are 8/8”/1.00”, and T-5’s are 5/8”/.625” in diameter)
OCCUPANCY SENSORS These various sensors detect motion and/or heat in order to turn lighting off when a room is unoccupied. Timers can also be used to control the operation of lighting fixtures.
LED EXIT SIGNS LED (Light-Emitting Diode) exit light lamps utilize 2 to 5 watts of power and have an expected service life of 20 to 25 years, which greatly decreases the maintenance required. As a result, the labor/time savings for Maintenance is actually greater than the energy savings. However, the energy savings per fixture can be as much as $20/sign/year alone.
Incandescent Exit Light
LED Exit Light with battery pack
So far there have been over 450 installations by Hospital Maintenance and over 2,200 by Campus Maintenance in 84 buildings
Rast Hall – Exterior LED Up-Lighting and Water Bottle Filling Station • Exterior LED Up-lighting – Installed 14 exterior LED up-lights. Each fixture saves 100 watts while providing better quality and brighter light, saving $800/year. Dusk to dawn lamp life should exceed 10 years.
Rast Hall Exterior LED Up-Lighting
18 Watt LED, 100K Hour Life, 5 Year Warranty
Wallace-Bell Pool – LED Lighting Upgrade
Upgraded 8 underwater LED pool lights, replacing 500 watt incandescent lamps with 45 watt LED’s, saving 3,640 watts in energy (approximately $1,650/year at 12 hours/day operation). Upgraded 10 - 500 watt quartz wall lights (that shine on the surface of the pool) to 78 watt LED tasklighting saving over 4,220 watts in energy (approximately $1,940 per year). All these lights should last for 10 years or more, have 2-3 year payback, and provide better lighting for the pool.
Wallace-Bell Pool LED Wall Packs
Wallace-Bell Pool Underwater LED’s
UAB Green – LED Acorn Pole Lighting Upgrade • UAB Green - Upgraded 76 150 watt (with ballast) high-energy mercury-vapor acorn pole-lights to 45 watt LED fixtures saving over 9,880 watts in energy (approximately $3,029 per year, 5 year payback).
UAB Green LED Acorn Pole-Light Upgrade
Eiko 45 Watt LED Acorn Replacement
VACUUM PUMPS Water-cooled vacuum pumps are being considered for replacement due to the rising costs of domestic water and the need for water conservation. Campus maintenance has replaced some water-wasting water cooled vacuum pumps with a non-water wasting claw type. • • • • • • • • • •
Bevill Biomedical Sciences Volker Hall Lyons-Harrison Building Tinsley Harrison Building Kaul Genetics Building Spain Wallace Hospital Biomedical Research Building II McCallum Basic Health Sciences Jefferson Tower Basement Dental School
Before: Water wasting and inefficient vacuum pumps and controls
After: Upgraded vacuum pumps and controls are energy efficient
ENERGY EFFICIENT MOTORS WITH VFD Variable Frequency Drives (VFD's) are used to vary the speed of an electric motor. They do this by changing the frequency of the electric power going to the motor. They work only with three-phase power. Today they are very economical and save energy by allowing the motor horsepower to be used only as needed.
Variable Frequency Drives (VFD’s) located in the University Business Office Building
Horsepower savings can be as much as $400 per horsepower per year.
FIN WATER RECOVERY UAB is now the leader in recovering and utilizing condensate water from air handler coils. The harsh and humid Alabama summer weather conditions cause huge amounts of condensation to form from the air hander chilled water coils.
Others have collected this condensate on a small scale before, but were limited due to the high cost of installing distribution piping to transfer the water to a remote area for utilization.
Typical Air Handling Unit – Kaul Building
Air Handler Coil and Condensate Collection Pan
FIN WATER RECOVERY UAB Facilities has solved this problem by creatively utilizing the existing underground distribution system of the Central Chilled Water Plant System to transfer the condensate water to the needed area, which is the Chilled Water Plant Cooling Towers which evaporate a lot of water. First, as condensate water is gravity drained from air handler chilled water coils, it is intercepted and collected in small basins positioned locally at each air handler.
Fin Water Collection Basin – Bevill
FIN WATER RECOVERY Each local basin incorporates a small level-controlled sump pump sized to transfer collected water to a larger collection tank.
500 gallon collection tank – Bevill
Fin Water Collection System – Bevill
The larger collection tank employs level controls that pump high-pressure, filtered, 55F condensate back into the centralized chilled-water return line before it leaves the building. This rise in pressure is sensed blocks away at the central plant and water there is locally relieved from the chilled water return line into the evaporative cooling towers.
Building A AHU1
AHU3 110V Submersible Sump Pump w/Internal Float Controller
Float Level Controller
Condensate Recovery Tank – 100 gallons each
Large Data Collection Collection 500 gallon tank FILTER
80 psig 45678
3 phase 480V 55 GPM Rated Grundfos Pump
C H I L L E D
Chilled Water Return Line to Central Plants 65-75 psig
FIN WATER RECOVERY This process reduces tower makeup water required during the evaporative cooling process. If the small basin sump pump, high pressure return pump, or Central Plant tower relief valve fails, the water safely exits as overflow down the local drain found in the building as it has for many years. While this process may have been accomplished before, we may indeed be the first to incorporate this manner of utilizing pressure relieved water in our cooling towers from long distances. Coming online May 2011, these systems this year will save over 10 million gallons of water combined from McCallum-Kaul, Zeigler-Tinsley Harrison Tower, Bevill, RSB, VH Tower, Shelby, and WTI Research buildings. These buildings along with ground water sources have saved over 23 million gallons during 2013.
Zeigler/Tinsley-Harrison Fin Water Collection System
Central Utility Plant 5 – Cooling Tower
North Pavilion Hospital – Basement Ground Water Recovery • North Pavilion Hospital has a flood-capable ground-water source in the sub-basement that must be constantly pumped to the storm drain, wasting electricity and huge amounts of usable water. • Water was tested and found very favorable for use in Central Plant Cooling Towers. • Water is pumped into the NP chilled water return line through a well pump, filter, and check-valve. • Across town, the Central Plant senses this pressure rise and water is relieved into the cooling tower • Project saved over 5.5M gallons of water last year since May, payback should be less than 1 year .
General Services Building (GSB) Tunnel – Ground Water Recovery System • The GSB Tunnel has a flood-capable ground-water source in the sub-basement that must be constantly pumped to the storm drain, wasting electricity and huge amounts of clean usable water. • Water was tested and found very favorable for use in Central Plant Cooling Towers. • Water is pumped above into the local chilled-water return-line through a filter, meter, and check-valve. • Pressure-relieved across town into the cooling tower, installed by Campus Maintenance, this project should save over 10M gallons of water per year ($50k) and have less than 6 month payback.
3 Days – 90K Gallons
GSB Ground Water Recovery System – Recovering water ahead of existing pumps to utilize it in the Central Plant Cooling Tower
UAB TOTAL ENERGY USAGE BTU/GSF
12.76% Reduction From FY0607 to FY1213 145,000 FY0607
UAB TOTAL WATER USAGE: GALLON PER GROSS SQUARE FOOT 40.00
15.50% Reduction From FY0809 to FY1213 33.00 FY0607
15.15% Reduction From FY0809 to FY1011
UAB TOTAL UTILITY COSTS – FY0607 to FY1112 $61,000,000
$7.27 million savings from FY0809 to FY1112 $51,000,000
Note: For comparison purposes this does not include The Women and Infants Center, Highlands Hospital, or Alumni House
UAB’S ENERGY CONSERVATION INITIATIVES
UAB’s Energy Management’s new slogan is “Think “Green” – Save “Gold”, while playing off the school colors, the message is that conserving energy at UAB not only benefits the environment by reducing the amount of pollution and global warming, any money saved on energy can be utilized for more research, education and health care.