Why do wind power plants significantly increase local temperatures?

A study carried out by a research team from Harvard University in the United States shows that wind energy does not have a negative impact on the environment as many imagine. First of all, wind power plants with a diameter of 100 meters will do this. This negatively impacts migratory birds and poses a direct threat to life. Thousands of birds die on wind turbines every year. In addition, when the separation generator reaches a certain density, it will also affect the flow of hot and cold air in the atmosphere. , causing direct changes in the local climate.

In the atmosphere, the hot air balloon is in the upper layer and the cold air is in the lower layer. The wind power plant will bring the hot air balloon to the ground, causing the ground to heat up quickly. The temperature increase can even reach 1.4℃. In fact, if you live in an area near wind turbines, you might be sensitive to this cchange. When you are under rows of instant split generators, you will feel a significant increase in temperature. According to estimates by Harvard University experts, if the entire energy supply in the United States adopts wind power, the average temperature in the United States will be . at least will increase by at least 0.25℃.

However, research from Harvard University appears to provide more reasons to revive the development of coal resources in the United States. Currently, wind turbines in the United States represent only 6.5% of total energy. to use partial electricity production. Moreover, partial electricity production only changes air flow, and it is temporary and regional, while global warming caused by fossil fuel combustion is permanent, global and even irreversible, so far , wind energy is. always oneclean energy that deserves to be promoted.

In meteorology, the airflow is preheated, and the rising airflow becomes colder and goes down, so the cold air is below and the warm airflow is above , but the generator blades which are hundreds of meters high bring the heat. the air flow descends towards the ground. The effect of a wind turbine is not obvious, but when you are under a row of wind turbines at a depth of more than 10 kilometers, the feeling must be very strong. The measuring instrument shows that the night temperature will be 1℃. higher, but this temperature increase is short-lived and recoverable.

The 100 meter high wind turbine collapsed in Yangzhou, what do you think is the cause?

There is a reason for this. The old electric fan is made up of three blades.

A few days ago the old electric fan in the house broke down, then I got onehey 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 related to two factors, one is wind energy and the other is wind speed.

The force of the wind is equal to the power of the wind multiplied by the speed of the windnt.

Now imagine that our wind turbine has many blades, which combine to form a 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 wind speed will gradually increase and the wind force acting on them will gradually decrease. In order to achieve maximum conversion power, a balance point must bet 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 D-shaped steel as longitudinal beams, steel plates as transverse beams, filled with foam inside, and covered with skin of fiberglassoutside.

The news that a 100-meter-high wind turbine broke in half and collapsed in Gaoyou Town, Yangzhou, attracted attention people on the Internet. There are many doubts about the cause of the collapse of this generator. Although authorities said the cause of the generator collapse was still under investigation, judging from the situation on site, it was very likely that the large engine was broken by strong winds. It is said that the wind was relatively strong on the day of the incident.

Personal speculation is that the generator collapsed. The first is the quality problem of the wind turbine itself. It is rare for a wind turbine to break in two and collapse. After all, wind resistance is already considered as a technical indicator during the manufacture of the generator. A collapsed generator may have quality issues. Dsecond, collapse. caused by strong winds. If a wind turbine encounters strong winds, it will also collapse. After all, no matter how strong the wind turbine is, there is a limit. If the wind intensity exceeds the strength of the generator, it will collapse. ; Finally, the installation is defective. Wind turbines must be installed in strict accordance with the process. If there are any irregularities or installation errors during the installation process, the generator will collapse.

Generally speaking, normal generators will undergo relevant experiments and inspections when they leave the factory. Only qualified products may be used. If substandard products hit the market, the generator will be damaged and collapse during use. .

Generally speaking, the reverse of the generatorThe collapse was caused by strong winds. Although the generator was designed with the impact of strong winds in mind, the generator also has its limitations. If the wind is too strong, the generator may break and collapse.

Wind turbines are also installations that require very high installation requirements. If there are errors and irregularities during the installation process of the wind turbine, it may also cause the wind turbine to collapse or break. generator collapse. A reason.