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-Occupancy Sensors to control lighting have been selectively retrofitted in most BYU-I buildings. All new buildings beginning with the Manwaring Center and Auditorium include these sensors as part of the base building package. -Labs are motion sensored 7x24x365 -Override switches available for after-hours work are installed in approximately 50% of our buildings -Chiller Plant renovations in multiple buildings which reconfigured pumping systems and resequenced operations resulted in 980,320 annual kWh savings per year or $56,859 per year savings going forward. -Steam and condensate lines have been upgraded with new insulation (Gilsulate 500 XL), this retrofit has proven to save thousands of dollars in energy savings. Heating loads at the Central Plant in 1997 were at approximately 47,000 lbs of steam per hour during peak winter loads, with the addition of over 1 million square feet to campus winter peak loads during the winter of 2009-2010 peak were at approximately 47,000 lbs. per hour. The insulation retrofit along with higher student loads has allowed the campus to increase in size yet maintain steam production at the same level. -High efficiency motors are installed when retrofitting motors and pumps.
BYU-I has evaluated additional energy savings opportunities that are incremental in savings, but collectively
add up to large savings. Some of the recent projects implemented are as follows:
-LED exit sign replacement: Program to replace existing incandescent or florescent exit signs with low wattage
LED exit signs. Estimated energy savings $613/year.
-Daylight Harvesting is being done in the Crossroads of the MC, Snow Hallways and Lobby, Thors Hall in the
Hart, University Operations Conference Room, Ricks, Smith, Hinckley, Spori and Kimball
-Wide scale early replacement of major components in our chiller plants. At present, even though new technology
chillers are more efficient, they aren't cost justified considering the capital cost and the reduced energy
consumption alone. Thus, replacement of major components in our existing chillers that are heavy energy users
are being replaced. If electric rates increase significantly, early replacement of total equipment could be implemented.
-Reduction in the total number of dedicated computer labs.
-Cutting Edge Trial---Installed an occupancy sensor in Ricks 131 along with a new low voltage switching
system, this allows us to operate more than one switch on the sensor, it also can control an auxiliary contact in
series with the sensor to drive the VAV into unoccupied mode. We will also use a temporary sensor that detects
lights and occupancy of that room to record the times that the lights and night set back would be in use or not,
and try to determine the savings from that.