Wind power plants are among the centers of energy production that are of special importance for electricity generation due to the replacement of wind instead of fossil fuels. using Turbine Wind turbines are spreading all over the world. The need to produce more energy, environmental considerations, and scarcity of underground resources in most countries are some of the things that have increased the desire to use this technology.
Already in many countries of the world, including Denmark and Germany, a significant percentage of energy Electricity via Wind farms Is provided. In Denmark, for example, about 20% of annual electricity consumption comes from wind energy. However, the share of wind farms in world electricity production is only 3%. In our country, steps have been taken in this direction for a long time, and now projects in the north (Manjil region) and east (Binalood-Khorasan) In progress.
By the end of 2004, 51 wind turbines were installed in various wind sites around the city of Manjil and Rudbar, with a total capacity of 21,580 kW, including 27 units of 300 kW turbines, 2 units of 500 kW turbines in Rudbar and Manjil areas. , 18 units of 550 kW turbines, three units of 660 kW turbines and one unit of 600 kW were in Babaian Manjil.
Manjil wind farm currently has about 87 wind turbines installed that can generate 180 million kilowatt hours of electricity annually. Also, the installation of a new site with about 36 turbines in this power plant is underway. If the installation of these turbines is completed in the next three to four months, the power generation capacity of the power plant will be 100 MW and its annual electricity production will be 300 million kW. Hours will increase.
These turbines are made of three blades with a length of approximately 30 meters by the kinetic energy of the wind Generator Located behind the blades, they convert electrical energy, and when the wind is right, each of these turbines can generate about one megajoule of electrical energy per second.
Wind energy extraction by wind turbines:
In wind turbines, the kinetic energy of the wind is converted to mechanical energy and then to electrical energy Becomes. Technical use of wind energy is possible when the average wind speed is in the range of 5 m / s to 25 m / s. The exploitable potential of wind energy in the world Ej 11 (equivalent to 1018 joules per 1 gajoule) is estimated, of which 60,000 MW of installed capacity is in the world by the end of 2005 (1383 AH).
Benefits of wind energy:
Among the advantages of using wind energy are the following:
No need for wind turbines for fuel
Free wind energy
Ability to supply part of the electricity demand
Relatively lower price of wind energy compared to fossil fuels
Lower running costs and long-term wind energy investment costs
Diversify energy sources and create a sustainable energy system
· High maneuverability for operation in any capacity and size (from several watts to several megawatts)
No need for water
No need for a lot of ground to install
No environmental pollution compared to fossil fuels
· Increase reliability in electricity generation
· creating jobs