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In all projects where
lighting is replaced, older inefficient lighting is replaced with
newer more efficient lighting and ballasts.
Older four tube fixtures using 140 watts of electricity can be
replaced with newer fixtures using 105 watts and produce the same, or
more, lighting. New
electronic ballasts do a better job of driving fluorescent bulbs, and
give off less waste heat. Incandescent
bulbs using 75 watts can be replaced with compact fluorescent bulbs
using 13 watts. In all of
these cases, there is less heat dissipated to the spaces the lighting
is in, resulting in less air conditioning required.
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When electric motors
are installed or replaced, the new motors comply with the requirements
of ASHRAE/ANSI 90.1. As an
example, older motors may have had efficiencies of 85%, where newer
motors would be over 92% efficient.
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Where plumbing
fixtures are replaced, lower flow fixtures are used.
Older toilets would use up to 5 gallons per flush, newer ones
use 1.6 gallons per flush. Older
urinals use up to 3 gallons per flush, newer ones use 0.8 gallons per
flush. Lavatory sinks
would use up to 1.5 gallons per minute, newer ones use 0.5 gallons per
minute.
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Install timers on air
handlers for energy savings – Project M-04080
– This project will add controls, or use existing control systems,
to shut down air conditioning systems during unoccupied times.
The obvious savings is from the electric motors on air
handlers, but when these are shut down, the heat transfer to the
chilled water stops, which also reduces the load on air conditioning
chillers, cooling towers, pumping, etc.
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Install chilled water
piping from contractor's stopping point to Food Safety and McCord Hall
– Project M-05090
– This will put McCord Hall and the
Food
Safety
Building
on the regional chilled water plant on the Ag Campus.
This will allow us to remove the less efficient air cooled
chillers and cool these buildings from the more efficient chilled
water plant at Plant Sciences Biotech.
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Replace AHU-8 at
Buehler Hall – Project M-05097
– This project was initiated to replace an air handler that was in
bad condition. With
improvements in ductwork, new equipment will be capable of providing
the same cooling using a 60 HP motor in lieu of the existing 75 HP
motor.
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Install DDC controls
on the HVAC system at Stokely Management System – Project M-05105
– This project is being done in conjunction with the lighting
upgrade project and will give capability to shut down air conditioning
systems in SMC during unoccupied periods.
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Install VFD
controllers on cooling towers – Project M-05106
– Campus cooling tower motors range in size from 10 to 75 HP.
Most of these currently operate on a start/stop basis, starting
and stopping numerous times each day.
By installing variable speed controllers, the starting energy
is minimized, plus less energy is used for the actual fan run cycle.
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Furnish and install
SCADA system – Project M-06089
– This system will monitor our electrical energy coming from KUB,
allowing us to better manage this resource.
This will give us a tool by which to determine where demand
savings potentials may be available.
If you have questions or concerns
about energy issues on campus
please contact Terry Ledford at 974-2415 or email: energyinfo@utk.edu
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