SUST.301 Exam 2

Azimuth

compass direction from north

Power Curve

Cut-in wind speed

minimum wind speed at which the turbine starts generating electricity; the point at which the wind is strong enough to overcome the turbine’s mechsnicsl resistence and begin rotating blades to produce power

rated output speed

the wind speed at whic the turbine first reaches its maximum power output

cut-out speed

the wind speed at which the turbine shuts down to avoid damaging parts

survival wind speed

the wind speed that would cause structural damage to the wind turbine

hub height

the height where blades are connected to the main shaft of the turbine

REC

Renewable energy credits

carbon offset

the use of carbon credits to enable organizations to compensate for their emissions

energy equation

E=p*t (energy=power*time)

watts equation

watts=amps(volts)(PF)

energy/power efficiency equation

energy efficiency=useful output energy/total input energy; power efficiency=useful output power/total input power

solar system size equation

kW system size= daily avg. kWh usage/slar map #/.85

mi/kWh for electric car equation

kWh needed= [mi driven(33.705)]/MPGe