1. Wind power was stopped because its environmental damage was far greater than the economic benefits it produced, and it was even less environmentally friendly. Damages include:
2. Wind power generation will harm the local ecological environment, destroy vegetation, change topography, cause soil erosion and desertify land.
3. Electromagnetic radiation produced by wind power generation affects human habitation. In wind power generation systems, generators, substations, transmission lines, etc. are the main causes of electromagnetic radiation. When the receiving device attached to the wind power plant receives the signal, it will receive the electromagnetic wave signal reflected from the wind turbine blades. Reflected signals are delayed signals that can have a significant impact onr AM radio systems.
4. Wind energy affects the local climate. Wind energy uses wind energy present in the atmosphere. According to the law of conservation of energy, the consumption and production of one type of heat must produce or consume another type of energy. Therefore, the energy production process of wind turbines must consume some of it. Wind energy in the atmosphere, and wind energy is climate change. One of the important factors of change, its changes will inevitably lead to climate change.
5. Wind power blades are prone to safety accidents when wind turbine blades are subjected to strong winds of more than 25 m/s, even if the wind turbine is stationary, due to bending. By the time the blade roots can resist, the torque, shear strength and extrusion resistance are limited. In severe cases, the bladeThe entire vehicle may fly away, causing casualties and damage to buildings on the road.
6. Noise risks caused by wind energy production. For a wind turbine of such size, when the long blades rotate, noise is inevitable. Wind blade noise can be roughly divided into three categories: Thickness noise, which is produced by the compression of the air and blades. In windy weather, when doors and windows are closed, you often hear a sharp, harsh sound, which occurs. It looks like a screaming ghost? , coupled with the dark sky outside, it’s a bit scary to think about it; load noise, as the name suggests, is caused by the blades carrying a large load which are generated when the Mach number is; close to 1. In this way, the impact of noise on the environment cannot be ignored.
Will wind turbines turn in the direction of the wind?
There is a reason for this. The oldan electric fan is made up of three blades.
A few days ago the old electric fan in the house broke down, then I bought a new one. This fan no longer has just three blades like the traditional electric fan, but is made up of many small blades. This design looks much better than a traditional electric fan. At the same time, this also reminds me of another problem, that is, wind turbines used in wind power generation, without exception, are made of three blades. Why is it? You can't create energy from nothing, so wind power doesn't create electricity from nothing, it just converts energy and turns wind energy into electricity. Since it is about energy conversion, it will inevitably involve a problem, namely the conversion efficiency. The wind energy conversion rate is closely linkedto two factors, one is wind energy and the other is wind speed.
Wind force is equal to wind power multiplied by wind speed.
Now suppose that our wind turbine has many blades that combine to form a closed disk. What about wind energy conversion? Basically zero. Because when the wind turbine becomes a closed disk, the wind force acting on the disk can actually be maximized, but no wind can pass through the disk and can only go around the disk, so the wind speed acting on the disk is zero. Any number multiplied by zero is zero, so even if the wind is very strong and there is no wind speed, there is no way to make the conversion. We see that to convert wind energy into electrical energy, the number of blades must be reduced so that the wind can pass quickly. As the number of blades decreases, the speed of the vent will gradually increase and the force of the wind acting on them will gradually decrease. In order to achieve maximum conversion power, a balance point must be found.
Now you might think that since a wind turbine has three blades, it must be because the wind is strongest with three blades, but that's not the case.
Calculations show that the wind energy conversion rate of the four blades is the highest. So why do wind turbines have three blades instead of four? When we encounter a problem, if we cannot find the answer in scientific principles, then the answer must be related to another factor, namely money. The fan is not an electric fan. It must withstand a lot of force and bending moment when working, so the material must be hard. The blades of modern large-scale wind turbines generally use steel pipes or aluminum.D-shaped steel as longitudinal beams, steel plates as transverse beams, filled with foam inside and covered with fiberglass skin outside.
Will the wind become stronger after the wind turbine stops?
Yes, the cabin can rotate and is always facing the wind. The technical term is yaw. Of course, the pod will not always rotate in one direction, such as clockwise or counterclockwise. If the wind direction is unlucky, it will always move in the same direction. The fan will spin at a maximum of seven to eight hundred degrees. must also rotate actively, which is called undocking. Prevent the cables inside from being pulled out.
A wind turbine is an electrical device that converts wind energy into mechanical work, which causes the rotor to rotate and ultimately produces alternating current. Wind turbinesThey usually consist of components such as a wind wheel, a generator (including devices), a steering (tail), a tower, a speed-limiting safety mechanism and an energy storage device.
Detailed information:
Generally speaking, a wind turbine is a motor usingthermal energy that uses the sun as a heat source and the atmosphere as a working fluid. Wind energy uses natural energy. This is much better than diesel power generation. But if it is used in an emergency, it is still not as efficient as a diesel generator. Wind power is not considered a backup energy source, but it can be used long term.
Baidu Encyclopedia - Wind Turbine
The original intent of your question is that wind turbines use conversion devices (windmills) to convert wind energy into electrical energy, so if the wind power If the generator is not running, is wind power more important than when the generator is running? Or is the wind speed greater than before?
For a closed space, according to energy conservation, this is the case. However, the working environment of the wind turbine is open,so whether the generator is working or not, it will not affect the operation. wind speed.
So-called wind energy is the mechanical energy corresponding to air flow - kinetic energy. The operation process of the wind turbine is to convert part of the kinetic energy of the air into electrical energy, and the total kinetic energy of the air is very large, and due to its fluid nature, part air passes through the wind turbine and the rest is immediately replenished there. Therefore, the wind speed will not be reduced due to generator operation.