81 meters.
In November 2015, China's largest offshore wind turbine was successfully installed in Pinghai Bay in Putian, Fujian. The wind turbine adopts Xiangdian XE128-5000 model, with a unit capacity of 5 MW, a channel diameter of 128 meters and a hub center height of 81 meters. It belongs to the 50MW offshore wind power project in Pinghaiwan, Putian, Fujian.
Principle
Convert the kinetic energy of wind into mechanical kinetic energy, and then convert the mechanical energy into electrical kinetic energy. This is wind energy production. The principle of wind power generation is to use wind energy to rotate the blades of the wind turbine, then use a speed multiplier to increase the rotation speed to induce the generator to produce electricity.
Detailed information
The first permanent magnet offshore wind turbine10MW direct drive from China has completed factory testing in Deyang, Sichuan. Dongfang Electric Group has the first IEC design certification certificate for this unit in China. This is the first 10 MW offshore wind turbine produced by Dongfang Electric Group.
On August 21, 2019, in Deyang, China's equipment manufacturing capital, at Dongfang Electric Group Dongfang Motor Co., Ltd., the reporter saw that this wind turbine with completely intellectual property rights independent operated normally with a live load. Around 5:00 p.m., the factory test is completed and the product can be shipped out of the factory.
Compared to wind turbines of 5 MW and less, 10 MW wind turbines are “large”. On October 17, 2018, Dongfang Electric Group Wind Power Co., Ltd. obtained the IEC design certification certificate for 10MW offshore wind turbines issued by China Quality Certification Center. This certificat is a “passport” for the design and manufacture of 10 offshore wind turbines. MW offshore wind turbines.
Baidu Encyclopedia - Wind Turbine
Wind power generates approximately 1.4 kilowatt hours of electricity per revolution.
Take the example of a 1,500 kilowatt wind turbine. The unit's blades are approximately 35 meters long (approximately 12 stories high). Each rotation of the wind turbine takes about 4-5 seconds (but the peak speed of the blades at this time can reach more than 280 kilometers per hour, comparable to the speed of a high-speed train) and can generate about 1, 4 kilowatt hours of electricity. . Under normal full power conditions, one day's electricity generation can be used by 15 families for a year.
Generally speaking, Category 3 winds are valuable for use. However, from an economic and reasonable point of view, wind speeds above 4 mres per second are suitable for electricity production. According to measurements, a 55 kilowatt wind turbine has an output power of 55 kilowatts when the wind speed is 9.5 meters per second; when the wind speed is 8 meters per second, the power is 38 kilowatts when the wind speed is 6 meters; per second, the output power of the unit is only 55 kilowatts, which is 16 kilowatts and when the wind speed is 5 meters per second, it is only 9.5 kilowatts.
The principle of wind energy production :
The principle is to convert the kinetic energy of the wind into mechanical kinetic energy, then convert mechanical energy to For electrical kinetic energy, it is wind energy. The principle of wind power generation is to use the wind to rotate the windmill blades, and then increasing the speed increases the rotation speed.to encourage the generator to produce electricity.
According to wind turbine technology, electricity production can start at a breeze speed of around three meters per second (the degree of breeze). Wind energy is becoming a craze worldwide because it does not require the use of fuel and does not produce radiation or air pollution.
The devices needed to produce wind energy are called wind turbines. This type of wind turbine can be roughly divided into three parts: the wind wheel (including the tail rudder), the generator, and the tower.
The wind wheel is an important element that converts the kinetic energy of the wind into mechanical energy. It is made up of several blades. When the wind blows toward the blades, an aerodynamic force is generated on the blades to rotate the wind wheel. The blade material requires high strength and light weight and is underwind made of fiberglass or other composite materials (such as carbon fiber).
The iron tower is the structure that supports the wind wheel, rudder and generator. It is usually built relatively high in order to obtain a greater and more uniform wind force and to have sufficient force. The height of the tower depends on the impact of ground obstacles on wind speed and the diameter of the wind wheel. It is generally between 6 and 20 meters.
The function of the generator is to transfer the constant rotation speed obtained from the wind wheel to the power generation mechanism through increased speed for uniform operation, thereby converting mechanical energy into electrical energy .
Reference for the above content: Baidu Encyclopedia - Wind Energy