1. First of all, for wind turbines, no matter how advanced they are, its maximum utilization rate is 59.3%, which is the Bates limit (a conclusion drawn based on aerodynamics). The maximum utilization rate of wind energy is Fixed value. ?
2. Different wind turbines now have different utilization rates. The utilization rates of large horizontal axis 3-blade wind turbines vary according to the size of the wind. Taking a 1.5MW large wind turbine as an example, the rated wind speed is 13~16m/s. The diameter of the wind wheel is 60-70M, and the Cp value, which is the wind energy utilization coefficient, is around 0.45. That is to say, the utilization rate is around 45%. The specific data needs to be based on the design plan.
3. For vertical axis wind turbines, the Cp value is lower, which is why vertical axis wind turbines have a small market share.
As of March 2020, the current price of wind power equipment is generally around 900,000 euros/MW, or RMB 7.61 million. 4 million can buy 0.5 MW wind power equipment. The price of a 300KW wind turbine is around 3.2 million yuan, and there are currently 0.5-2.0 MW wind power equipment on the market.
It depends on what brand you choose, how much power, what kind of configuration, etc. Generally speaking, domestic brands such as Yuchai and Weichai are relatively cheaper, while international brands like Cummins have absolutely superior technology and are relatively expensive. The higher the power, the higher the price. The configuration level also directly affects the price.
Extended information:
The principle of wind power generation is to use wind power to drive the windmill blades to rotate , and then increase the rotation speed through the speed increaser to promote the generator to generate electricity. According to windmill technology, power generation can begin at a breeze speed (the degree of breeze) of approximately three meters per second. 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. (Large wind power stations basically do not have tail rudders, and generally only small ones (including household types) have tail rudders).
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). (There are also some vertical wind wheels, S-shaped rotating blades, etc., which have the same function as conventional propeller-type blades).
Baidu Encyclopedia-Wind Power Generation