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Energy Efficiency Project Information
Outside Air
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Santa Fe’s Gymnasium usage ranges from a few students playing basketball to events such as graduation where nearly 3000 people are in attendance. The challenge was to design a system that could provide comfort for such a drastically varying load and be energy efficient at the same time.

This challenge was overcome with an air handling system that can vary its air flow to one eight of its capacity. Even at lower air flows, the air distribution is such that space comfort is maintained uniformly. The energy model for the new system showed over 40% reduction in energy consumption.

Summary:

As the existing cooling towers reached their useful life SF saw an opportunity to replace them with new, more energy efficient cooling towers. After their installation the new cooling towers have had a significant impact on lowering energy consumption on campus.

General Facts:

Original Construction: 1980
Project Description: Replaced existing cooling towers with new energy efficient cooling towers.
Technical Facts:

Saved electricity: 614,000 kWh, enough electricity to power 63 homes for a year.
Emissions reduction: 526 tons of CO2, equal to taking 87 cars off the road for a year.
Carbon reduction: Equal to carbon sequestered by 108 acres of pine forest each year.
Qualified for Gainesville Regional Utility rebate for $40,000 for the 2008 year.

GRU presenting rebate check to Bill Reese and Rebecca Rogers.
Summary:

This project replaced the existing lights in the gymnasium with new, high efficiency T-5 light fixtures.

General Facts:

Light fixtures with T-5 bulbs are more efficient than traditional fixtures with T-8 and T-10 bulbs.

Technical Facts:

The existing lights in the gym produced 18 to 24 foot candle of light and consumed 27.1 kw of energy. The new T-5 fixtures produce 40 to 60 foot candles of light per fixture while consuming 8.9 kw of energy, producing twice the light for one third of the energy used by the old fixtures.
Before lighting retrofit.
After lighting retrofit.
Summary:

Many air handling units at SFC have been replaced at the end of their lifespans. Here is an example of the savings from just one replacement with smart energy designs.

Building B houses SFC’s math program and has predominantly classroom space. It had multi-zone type air handers that had lived past their expected life. SFC took the opportunity to replace them and installed an energy efficient variable air volume system. Digital controls were added that allowed for even more energy conservation strategies to be executed.

General Facts:

Saved electricity: 118,000 kWh, enough to power 10 homes.
Emissions reduced: 100 tons of CO2, equal to taking 17 cars off the road for a year.
Carbon reduction: Equal to carbon sequestered by 20 acres of pine forest each year.
Qualified for Gainesville Regional Utility rebate of $40,000 for the 2008 year.

Technical Facts:

Original Construction: 1970
Building Type and Area: Academic (Mostly Classrooms), 40,000 square feet

Replaced multi-zone air handling units with single path variable air volume units. Variable air volume terminals were located close to mechanical room to avoid duct work replacement. A building meter was installed to track overall energy consumption. Variable frequency drive integration allows supply fan energy consumption to be tracked continually. Having this information allows SF to compare performance and quickly identify energy or operational anomalies. Annualized energy consumption reduction of 118,000 kWh.
Parking Lot Lights:

SFC replaced 216 metal halide lamps using 325 watts each with induction lamps using 200 watts each for a reduction in power use of 43.2 kW.

Campus Walkways:

SFC replaced 37 lamps using 175 watts each, 20 lamps using 100 watts each and 3 lamps using 400 watts each with LED lamps using 40 watts each for a total reduction in power use of 7.3 kW.

Miscellaneous Areas:

SFC replaced 16 lamps using 400 watts each with 200 watt induction lamps, 3 lamps using 400 watts each with 22 watt LED, 7 lamps using 100 watts each and 3 lamps using 175 watts each with a combination of 3 lamps using 80 watts and 4 lamps using 40 watts each for a total reduction in power use of 5.2 kW.

Before lighting retrofit.
After lighting retrofit.
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