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Description of Campus Utilities
• Electricity• Water and Sewer• Natural Gas• Fuel Oil #6• Fuel Oil #2• Stormwater
Management
• Electricity• Water and Sewer• Chilled Water• Steam and Heating
Hot Water
Purchased Utilities Distributed Utilities
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• Moving towards Centralized Distribution
• 5 Steam and Chiller Plants
• Cates• Yarbrough• West Chiller• Centennial• CBC
• 3 Electrical Substations
• Sullivan• Centennial• CBC
Description of Campus Utilities
What is centralized distribution?
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District energy systems produce steam, hot water or chilled water at a central plant. The steam or water is then piped underground to individual buildings for or space heating, domestic hot water heating and air conditioning. As a result, individual buildings served by a district energy system don't need their own boilers or furnaces, chillers or air conditioners. The district energy system does that work for them, providing valuable benefits including:• Improved energy efficiency • Enhanced environmental protection• Fuel flexibility • Ease of operation and maintenance • Reliability • Comfort and convenience for customers • Decreased life-cycle costs • Decreased building capital costs • Improved architectural design flexibility
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What is district energy?
http://www.youtube.com/watch?v=H3ef6dz8BGg
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Campus Utilities: Chilled Water
Electricity (sometimes steam) and Water
A chiller cycle, similar to that of a
refrigerator or home AC unit, produces
cold water
42˚ F water is pumped to campus
buildings
CHILLER
Chilled Water
Purchased Utility Distributed Utility
• 5 Central Plants Serving 3 Campuses• Currently 17,800 tons of cooling installed• Build out capacity of 32,600 tons• 4+ miles of distribution piping – 4” to 48”• 21 stand alone systems (not connected to Central Plants)
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Campus Utilities: Steam/Condensate
Gas/Fuel Oil and Water
Steam at 150 PSI and 360˚F is distributed to
campus buildings
Steam and Domestic Hot Water
Fuel is combusted in a boiler to heat water and produce steam
BOILER
Purchased Utility Distributed Utility
• 4 Central Plants serving 3 Campuses• 1 mile of Utility Tunnels• 3+ miles of underground distribution pipes• Natural Gas, #2 Oil, and #6 Oil Fuels• 64 Steam & Condensate Meters
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Campus Utilities: Electricity
Electricity
Electricity is distributed
throughout main campus at 12,470 or
22,860 Volts
SUBSTATION
Electricity from the utility comes in at
120,ooo or 230,000 Volts
Electricity
Purchased Utility Distributed Utility
• 3 Major Substations served by Progress Energy• 23 looped circuits• 170 Circuit Switches• 200 Building Transformers• 202 Meters
•117 locations served direct by Progress Energy
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2.2 trillion BTUs
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The total amount spent on NC State utilities in FY 2010 was $32.2 million.
Electricity accounted for 65.9% ($21.2 million) of the total utility costs and provided for 52.3% of the total energy usage.
Natural gas accounted for 22.2% ($7.1 million) of the total utility costs and provided for 43.4% of the total energy usage.
6.9% ($2.2 million) of the total spent was on water supply. The water purchased was used for hygiene, HVAC, irrigation and in research laboratories
2.2 trillion BTUs$32,367,840
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