How much electricity can a windmill generate when it rotates once?

Introduction How much electricity can a windmill generate when it rotates once? A windmill that rotates once can generate 1.96 kilowatt hours of electricity. The power of different engines is different. When the wind energy is relatively stable, it usually takes 60 mi

How much electricity can a windmill generate when it rotates once?

One rotation of the windmill can generate 1.96 kilowatt hours of electricity.

Different engines have different powers. When the wind energy is relatively stable, it can generally generate 2,000 degrees of electricity in 60 minutes. On average, it can generate 0.56 degrees of electricity per second, and one revolution The amount of electricity that can be generated is 1.96 kWh. Of course, this data is not completely accurate and will be affected by the influence of wind and the constraints of the generator itself. Solar energy-related technology is not mature enough and has not been put into large-scale use due to its relatively high cost.

But there are still many people who are still committed to research in this energy field, and this energy will also bring great changes to people's lives in the future. In the future, those with poor conversion rates will be harmful to the environment. There will also be adverse effects on the way power generation is gradually changed.

The principle of windmill power generation

The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then increase the speed of rotation through a speed increaser. to cause the generator to generate electricity. The blades are used to receive wind power and convert it into electrical energy through the nose. The tail allows the blades to always face the direction of the incoming wind to obtain the maximum wind energy. The swivel allows the nose to rotate flexibly to realize the function of adjusting the direction of the tail. The rotor of the nose is Permanent magnets, stator windings cut magnetic lines of force to generate electrical energy.

Due to the unstable air volume, the wind turbine outputs alternating current of 13-25V, which must be rectified by the charger and then the battery is charged, so that the electrical energy generated by the wind turbine is converted into chemical energy. . Then use an inverter power supply with a protection circuit to convert the chemical energy in the battery into AC 220V mains power to ensure stable use.

Wind power generates approximately 1.4 kilowatt hours of electricity per cycle.

Take a 1,500-kilowatt wind turbine unit as an example. The blades of the unit are about 35 meters long (about 12 stories high). Each rotation of the wind turbine takes about 4-5 seconds (but the blade tip speed 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 power generation can be used by 15 families for one year.

Generally speaking, Category 3 winds are valuable for utilization. However, from an economic and reasonable perspective, wind speeds greater than 4 meters per second are suitable for power generation. 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. 16 kilowatts; and when the wind speed is 5 meters per second, it is only 9.5 kilowatts.

The principle of wind power generation :

The principle is to convert the kinetic energy of the wind into mechanical kinetic energy, and then convert the mechanical energy into For electric kinetic energy, this is wind power. The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then use a speed increaser to rotate the blades.The speed is increased to prompt the generator to generate electricity.

According to windmill technology, power generation can start at a breeze speed of about three meters per second (the degree of breeze). Wind power is becoming a craze around the world because it does not require the use of fuel and does not produce radiation or air pollution.

The devices required for wind power generation are called wind turbines. This kind of wind turbine can be roughly divided into three parts: wind wheel (including tail rudder), generator and tower.

The wind wheel is an important component that converts the kinetic energy of the wind into mechanical energy. It is composed of several blades. When the wind blows towards the blades, aerodynamic force is generated on the blades to drive the wind wheel to rotate. The blade material requires high strength and light weight, and is often 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 generally built relatively high in order to obtain larger and more uniform wind force and to have sufficient strength. 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 in the range of 6-20 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 even operation, thereby converting mechanical energy into electrical energy.

Reference for the above content: Baidu Encyclopedia - Wind Power

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