Hollow. Wind turbines that produce electricity are generally hollow rather than solid. The hollow design of the windmill can reduce weight, make it easier to rotate the windmill and reduce wind resistance. In modern wind turbines, wind blades generally adopt a hollow blade structure, which can capture and use wind energy through the principle of aerodynamics to rotate the generator to generate electric power. The solid structures of wind turbines are used more for decorative and scenic purposes and cannot produce electrical energy.
If you use the principle of wind power to generate electricity, install a windmill on the car, and when the car drives, the windmill will rotate to generate electricity and store it in the battery. done...
The idea of “using wind energy from metro tunnels to produce electricitytricity” aroused the curiosity of many people and also aroused some doubts. "Although from the perspective of efficient energy utilization, the wind power generated in the metro system can be used for development and utilization, the wind power generated is too small and it is difficult to achieve economies of scale, which has no economic value in "Zhou Tao, a new energy sector analyst at Great Wall Securities, believes that he has not heard of the practice of to use wind energy in the city to generate electricity around the world. Even if the metro company agrees to develop such a project, it will be difficult to attract investor interest.
Wang Mengshu, an academician of the Chinese Academy of Engineering, is also not optimistic about this project. He believes that the idea of using wind energy in tunnels to produce electricityis simply impossible and technically unreliable. He explained that trains running on metro lines had time intervals. At present, Beijing's fastest Line 1 generally has an interval of more than 2 minutes. Therefore, even if a small wind turbine is installed in the tunnel, it cannot obtain sustainable and stable wind power.
As the two parallel metro tunnels are every 400 to 500 meters, they are connected by passages in the middle. In these two tunnels, the wind generated by the passage of the metro train will enter the other tunnel. Additionally, the trains in the two tunnels run in different directions, so the wind directions are also different. This makes it difficult for wind power equipment to operate continuously and stably.
In response to the experts' doubts, Zhong Yan said that in some actual tests they carried out, they did not find anyuve the problems caused by the wind direction in the tunnel mentioned by academician Wang Mengshu. In response to the questions raised by the experts, they also wished to communicate with relevant experts, including Academician Wang. For safety reasons, they considered designing the wind rotors mounted on both sides of the subway tunnel as thin cylindrical wind rotors.
Have you ever considered the principle of the wind tunnel for the production of electricity in tunnels? Subway operation requires excess air at the front to be pushed toward the rear of the car as quickly as possible. In this way, the locomotive can operate with minimal energy consumption. Adding windproof devices around the tunnel will definitely affect the speed and power consumption of the locomotive. Adding a few wind turbines around the tunnel will increase the windward area of the front of the locomotive. Increase thewind resistance.
Your idea is good, but it is not feasible. First situation: when the car is traveling in the opposite direction to the wind. When the car is driving, the electricity generated by the rotation of the windmill will increase the resistance of the car. In other words, it will significantly increase the fuel consumption of vehicles. ImmediatelyIt converts fuel energy into battery energy. Due to indirect conversion by wind turbines, there will be a huge loss of energy. The gain exceeds the loss.
The second situation is when the car is traveling in the same direction as the wind. This is because the speed of cars is generally faster than that of the wind, so wind power cannot produce electricity.