Wind is a new energy source with great potential. In the early 18th century, a violent wind swept across Britain and France, destroying 400 windmills, 800 houses, 100 churches, and more than 400 sailing ships. Thousands of people were injured and 250,000 trees were uprooted. As far as pulling a tree is concerned, the wind produces 10 million horsepower (that is, 7.5 million kilowatts; one horsepower is equal to 0.75 kilowatts) in a few seconds! It has been estimated that the wind resources available on the earth for power generation are about There are 10 billion kilowatts, almost 10 times the world’s hydroelectric power generation. The energy obtained by burning coal every year in the world is only one-third of the energy provided by wind in one year. Therefore, both at home and abroad attach great importance to the use of wind power to generate electricity and develop new energy.
Attempts to use wind power to generate electricity began as early as the beginning of the twentieth century. In the 1930s, Denmark, Sweden, the Soviet Union and the United States successfully developed some small wind power generation devices by applying the rotor technology of the aviation industry. The small wind turbines, widely used on windy islands and remote villages, generate electricity at a much lower cost than small internal combustion engines. However, the power generation at that time was relatively low, mostly below 5 kilowatts.
It is understood that 15, 40, 45, 100, 225 kilowatts of wind turbines have been produced abroad. In January 1978, the United States built a 200-kilowatt wind turbine in the town of Clayton, New Mexico, with a blade diameter of 38 meters and enough power to generate electricity for 60 households. In the early summer of 1978, a wind power plant was put into operation on the west coast of Jutland, Denmark, with a power generation capacity of 2,000 kilowatts and a windmill height of 57 meters. .
In the first half of 1979, the United States built another windmill for power generation in the Blue Ridge Mountains, North Carolina. The windmill is ten stories high, and the diameter of the windmill steel blades is 60 meters; the blades are mounted on a tower-shaped building, so the windmill can rotate freely and obtain electricity from any direction; when the wind speed is above 38 kilometers per hour, the power generation capacity is also up to 2000 kW. Since the average wind speed in this hilly area is only 29 kilometers per hour, the windmills cannot be fully moved. It is estimated that it could meet 1% to 2% of the electricity needs of seven North Carolina counties even if only operating half of the year
Post time: Aug-29-2022
