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Landfill Gas Electric Generating Plant <br />THE PHYSICAL PLANT <br />*5100 sq. ft. state-of--the-art power plant <br />* Houses three 800 kW Caterpillar engine- <br />generators (room for one more) <br />* Annual output = 20 million kilowatt-hours <br />(enough for 15% of Elk River's needs) <br />* 720 sq. ft. Environmental Learning Center <br />THE FUEL <br />*Landfill gas from decomposing garbage <br />* 52% methane, 47% carbon dioxide, 1% misc. <br />* Current production rate = 1000 cu. ft./min. <br />* Estimated output of existing cells is 35 yrs. <br />* Additional cells will allow for expansion <br />* Gas collected from 30+ wells at .5 psi vacuum <br />* Gas is compressed to 5 psi (removes moisture) <br />and filtered before delivery to engines <br />THE ENGINE-GENERATORS <br />* 16 Cylinder, 1150 hp CAT engines <br />* Designed for continuous use @ 1200 RPMs <br />* Each engine consumes 330 cu. ft. of gas/min. <br />* Change oil every 750 hrs. @ 90 gallons <br />* Engine coolant = 350 gallons <br />* Est. time before top end overhaul is one year <br />and before complete overhaul is five years <br />* Generators are 6-pole, permanent magnet, <br />4160 volt AC, with output rated at 800 kW <br />THE CONTROL ROOM <br />* Houses controls and metering to regulate <br />generator output voltage and frequency <br />* Houses breakers and switchgear to connect <br />each generator to or disconnect each <br />generator from the distribution system <br />THE ENVIRONMENTAL LEARNING CENTER <br />* Meeting room for Energy City activities <br />* Classroom for energy/environmental workshops for school groups <br />* Available for group tours of landfill, landfill gas-to-electric plant, and other <br />Energy City demonstrations. Ca11763/441-2020 for more information. <br />