03-09-2015 Council Packet - Laserfiche WebLink

Home Browse Search

� some annual maintenance.Bolts wind speed results in a large increase and electrical mnnections should be in power.That is why a taller tower checked and tightened if necessary. will increase the productivity of any The machines should be checked for wind turbine by giving it access to corrosion and the guy wires for higher wind speeds as shown in the proper tension.In addition,you Wind Speeds Increase with Height should check for and replace any graph.The formula for calculating worn leading edge tape on the blades, the power from a wind turbine is: if appropriate.After 10 years,the Power=k Cp 1/2 p A V' blades or bearings may need to be replaced,but with proper installation �ere: and maintenance,the machine should P = Power output,kilowatts last up to 20 years or longer. CP= Maximum power coefficient, ff you do not have the expertise to rang�g��0.25 to 0.45, maintain the machine,your installer �►ension less(theoretical may provide a service and mainte- m��=0.59) nance program. p = Air density,lb/ft� How Much Ene Will M A = Rotor swept area,ftzor C9Y y n Dz/4(D is the rotor System Generate? diameter in ft,n=3.1416) Most U.S.manufacturers rate their V = Wind speed,mph turbines by the amount of power they k = 0.000133 A constant to yield can safely pmduce at a particulaz �,�� wind speed,usually chosen between the above kilowatt answer by 24 mph(10.5 m/s)and 36 mph(16 m/ 1.340 mnverts it to horse- s).The following formula power[i.e.,l kW=1.340 illustrates factors that are important horsepower]). to the performance of a wind turbine. �e rotor swept area,A,is important Notice that the wind speed,V,has an because the rotor is the part of the exponent of 3 applied to it.This �bine that captures the wind energy. means that even a small increase in Relative Size of Small Wind Turbines ao 8 � `>;,: .�-:_,> 6 E �5 m m �4 O B � `03 0 � 2 • o • / 1 � Sour�e:Paul Gipe,Wind FnergyBasics