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Foothill College & Space Science Center

Foothill College & Space Science Center. Bill Kelly Viron Energy Services (510) 538-4416 ext 13, bkelly@viron.com. Foothill College & Space Science Center. Space Science Center/ Foothill Observatory. Foothill Campus: 484,000 square feet Space Science Center Built in 1965

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Foothill College & Space Science Center

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  1. Foothill College &Space Science Center Bill Kelly Viron Energy Services (510) 538-4416 ext 13, bkelly@viron.com

  2. Foothill College & Space Science Center Space Science Center/ Foothill Observatory • Foothill Campus: • 484,000 square feet • Space Science Center • Built in 1965 • Circular brick building • 12,600 square feet on 2 floors • Community college classes & astronomical observatory • 6 day a week operation, including night classes and evening observations

  3. The original buildings were designed for heating and ventilation only When cooling was added, a separate systems for cooling in each building was installed DX coils cut into H&V fan coil units with remote air cooled condensers 1.1 to 1.3 kW/ton Space Science Center included heating only No roof insulation Older lighting system Constant air volume, no energy management system Uncomfortable building Foothill College & Space Science CenterProject Scenario

  4. Foothill College & Space Science CenterBaseline Electrical Energy Use • Entire campus energy use • 7 million kWh • 14.5 kWh per square foot per year • $515,000 per year • average of $0.073 per kWh • High energy use and cost • For a campus where the majority of rooms are not air conditioned

  5. Foothill College & Space Science CenterProject Challenges • Balancing energy cost savings with needed campus improvements (i.e. adding air conditioning) • Coordinating central plant and chilled water loop design with campus long term Master Plan • Keeping classrooms operational • Staging extensive construction on a busy campus

  6. Foothill College & Space Science Center System Solutions • Two phase project • New chilled water loop to serve the entire campus • Upgrade HVAC & lighting systems in each building

  7. Foothill College & Space Science CenterNew Chilled Water Loop • Central Plant is designed to serve 484,000 square feet & 57 buildings • The Central Plant will include: • R-22 rotary screw chiller, 0.65 kW/ton, 170 tons • R-123 variable speed centrifugal chiller, 0.55kW/ton, 350 tons • Variable speed secondary chilled water pumping • Chilled water loop piping • PVC, Direct Buried and in Tunnels

  8. Foothill College & Space Science CenterHVAC System Improvements • Space Science Center • Variable air volume system, including new built-up air handling system and air distribution system • Energy management system tie-ed into new campus-wide Novar system • Operates based on temperature settings, outdoor temperature, operating schedule • Other HVAC improvements • 100% outside air economizer system • New Boiler and hot water pump

  9. Foothill College & Space Science CenterCooling Load Reductions • Replaced existing lighting • New indirect T-8 fluorescent fixtures, electronic ballasts • New LED exit signs • Occupancy sensors for classrooms • Added roof insulation • R-19 added to roof

  10. Foothill College & Space Science CenterIntegrated Economics • Long payback periods since most of the campus was not air conditioned and all improvements including major capital improvements.

  11. Foothill College & Space Science CenterFinancing Structure • Three primary funding sources • Municipal operating lease - 26% • Deferred maintenance bonds - 54% • Local bond - 20% • Utility rebates • $16,000 from 1998 PG&E Retrofit Express • $150,000 from 1998 PG&E Standard Performance Contract

  12. Foothill College & Space Science CenterProject Timeline Oct 97 Apr 98 Oct 98 Apr 99 Oct 99

  13. Foothill College & Space Science CenterProject Results • Reduced energy use by $0.27 per square foot • Maintenance costs down $4,500 per year (mainly for lighting) • New air conditioning, controls & lighting make building more comfortable and attractive • Maintained original campus architecture while adding air conditioning

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