Wind Turbine Size

Wind Turbine Size

Wind Turbine Size

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Windturbinescanbearbitrarily divided into three classes: small, medium, and large. Small wind turbines are capable of generating between 50 watts and 60 kilowatts of power, and use rotors ranging in diameter from less than 1 to 15 m (3 to 50 ft). Small wind turbines are installed primarily in remote areas where power is needed but access to conventional sources of electricity is either too expensive or too unreliable. Some small turbines, known as micro-turbines, are so compact they can be carried to remote locations on horseback.

Mostcommercialwindmachines are medium-size turbines. Medium-size turbines use rotors spanning diameters between 15 and 60 m (50 and 200 ft), and have a generating capacity ranging from 50-1,500 kilowatts. Most medium-size commercial turbines have a generating capacity in the range of 500 kilowatts to 750 kilowatts.

Largewindturbinesare behemoths with rotors spanning diameters between 60 and 100 m (200 to 330 ft), and are capable of generating 2 to 3 megawatts of power. Because the cost-effectiveness of conventional coal-fired and oil-fired power plants increases with the size of the plants, it was originally thought that giant wind turbines would be more economical than smaller turbines. Various countries have attempted to develop commercial multi-megawatt wind turbines, but these machines have proved less economical and less reliable than medium-size turbines.

GROWIAN Wind Turbine, Germany

Looking for an alternate energy source during the oil shortages of the 1970s, German engineers constructed the experimental GROWIAN turbine to generate the maximum amount of electric power with the biggest turbine possible. With blades nearly 50 m (160 ft) long, it was the world's largest wind turbine at the time of its construction. The massive turbine proved difficult to maintain and is no longer in use. Through this experience, engineers learned that medium-sized turbines could harness wind energy at a more cost-effective rate than large turbines.

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