Wind energy The kinetic energy generated by air flow is renewable energy (including water energy, bioenergy, etc.). The kinetic energy of the air stream is called wind energy. The higher the air flow rate, the greater the kinetic energy. One can use a windmill to convert the kinetic energy of the wind into a rotating motion to propel the generator to generate electricity by transmitting the rotational power of the rotor (composed of aerodynamically driven blades) to the generator through the drive shaft. As of 2008, wind power generated by the world is about 94.1 million kilowatts, and the power supplied has exceeded 1% of the world's consumption. Although wind energy is not the main source of energy for most countries, it has grown more than four times between 1999 and 2005.
Modern use of turbine blades converts the mechanical energy of the airflow into electrical energy to become a generator. In the Middle Ages and Ancient times, windmills were used to collect the mechanical energy used to grind grain and pump water.
Wind power is used in large-scale wind farms and in locations where power is isolated, making a significant contribution to local life and development.
Wind energy is rich, almost endless, widely distributed, clean and tempered by the greenhouse effect. There is a certain range of the Earth's surface. After a long-term measurement, the survey and statistics of the average wind energy density is said to be the basis for the use of the range, usually marked by the energy density line on the map.
The history of human use of wind energy dates back to BC. AncientEgypt,China, and Babylon were among the first countries in the world to use wind energy. Using wind power to raise water, irrigate, grind, and glutinous rice in BC, the sails were used to propel the ship forward. Due to the shortage of oil, modern sailing boats have received great attention in modern times. In the Song Dynasty, it was the heyday of the application of windmills inChina. The popular vertical axis windmills were still in use today. In foreign countries, in the 2nd century BC, the ancient Persians used vertical axis windmills to mill rice. In the 10th century, Islamic people used windmills to raise water, and 11th century windmills have been widely used in the Middle East. The 13th century windmills spread to Europe, and the 14th century has become an indispensable prime mover in Europe. Windmills in theNetherlandswere first used in the waters of the Rhine Delta and low-lying wetlands, and later used for oil extraction and sawing. It was only because of the emergence of steam engines that the number of windmills in Europe fell sharply.
For thousands of years, wind energy technology has developed slowly and has not attracted enough attention. However, since the 1973 World Petroleum Crisis, under the dual pressures of conventional energy emergency and global ecological environment deterioration, wind energy has re-emerged as a part of new energy. As a non-polluting and renewable new energy source, wind energy has great potential for development, especially for coastal islands, remote mountainous areas with inconvenient transportation, sparsely populated grassland pastures, and rural areas far from the grid and the recent grid. Borderland, as a reliable way to solve the energy of production and living, is of great significance. Even in developed countries, wind energy is increasingly valued as an efficient and clean new energy source.