03-09-2015 Council Packet - Laserfiche WebLink

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i Glossary of Terms kWh—Kilowatt-hour,a measure AirtOil—The shape of the blade cross- of energy equal to the use of one section,which for most modem hori- �owatt in one hour. zontal axis wind turbines is designed MW—Megawatt,a measure of power to enhance the lift and improve tur- (1,000,000 watts). bine performance. N2Celle—The body of a propeller-type Ampere-hour—A unit for the quantity wind turbine,containing the geazbox, of electricity obtained by integrating g�erator,blade hub,and other parts. current flow in amperes over the time 0&M COsts-0peration and mainte- in hours for its flow;used as a mea- sure of battery capaaty. nance rnsts. Anemometer—A device to measure Power coefficient—The rario of the the wind speed. power extracted by a wind turbine to the power available in the wind Average wind speed—The mean wind stream. speed over a specified period of time. pOwer Cutve—A chart showing a 618des—The aerodynamic surface that wind turbine's power output across catches the wind. a range of wind speeds. Brake—Various systems used to stop PU�Public Utility Commission,a the rotor from turning. state agency which regulates utilities. COnverter—See Inverter. �n so�►e areas known as Public Service Cut-in wind speed—The wind speed Commission(PSC). at which a wind turbine begins to PURPA—Public Utility Regulatory generate electriaty. Policies Act(1978),16 U.S.C.§2601.18 Cut-out wlnd Speed—The wind speed CFR§292 that refers to small at which a wind turbine ceases to generator utility connection rules. generate electricity. RBted output CBpaClty—The output Densi power of a wind machine operating ty—Mass per unit of volume. at the rated wind speed. DOwnwirld-0n the opposite side Rated wind speed—The lowest wind from the direction from which the speed at which the rated output wind blows. power of a wind turbine is produced. Furling—A passive protection for the RotO�The rotating part of a wind turbine in which the rotor folds either }�bine,including either the blades up or azound the tail vane. and blade assembly or the rotating GI'id—The utility distribution system. portion of a generator. The network that rnnnects electricity ROtor d'18meter—The diameter of the generators to electricity users. �cle swept by the rotor. HAWT—Horizontal axis wind turbine. RotOr Speed—The revolutions per InV2rt2f—A devim that converts direct minute of the wind turbine rotor. current(DC)to altemating cunent Start-up wind speed—The wind speed (AC). at which a wind turbine rotor will kW—Kilowatt,a measure of power for begin to spin.See also Cut-in wind electrical current(1000 watts). speed.