The blades of wind turbines used for wind power generation do not rotate very quickly, so some people think that the electrical energy generated by a tower is very small. Do you know that these large wind turbines spin once? can a circle generate? Let's take a look at the following.
Wind turbine power
Among all wind power generators, depending on the power of the wind power generator, the amount of The energy produced by the wind generator with each rotation The electrical energy is also different. For example, the most common 2MW direct drive wind power generator When the wind power is sufficient and stable, the wind motor can generate 2000 degrees of electricity every 60 minutes and every rotation. of the fan blade takes 3.5 seconds, 60 minutes is 3,600 seconds, so the electricity generated by the generatortor per second is 0.56 kilowatt hour, then the electricity generated by the wind power generator fan for each rotation is 0.56 to 3.5. seconds, or 1.94 kilowatt hours of electricity.
Classification and principles of wind turbines
According to the different rotation axes of wind turbines, wind turbines are divided There are two types horizontal axis wind turbines and vertical axis wind turbines. The principle of wind power generation is actually very simple. The wind blows the huge blades of the wind power generator to generate kinetic energy, which is then converted into energy. thanks to the internal electrical energy generator.
Generally speaking, wind turbines are divided into horizontal axis wind turbines and vertical axis wind turbines according to the different axes of rotation. The most common 2 MW direct drive wind power generator can generate 1.94 kilowatthours of electricity per turn under wind energy recombination conditions.
Although there are many types of wind turbines, they can be summarized into two categories: ① Horizontal axis wind turbines, the axis of rotation of the wind wheel is parallel to the direction of the wind. ; ② Vertical axis wind turbines In a wind turbine, the axis of rotation of the wind wheel is perpendicular to the ground or the direction of air flow. There are several types of vertical axis wind turbines that use resistance to rotate, including wind turbines made of flat plates and cups, which are pure resistance devices; S-type wind turbines, which have some lift but are primarily resistance devices. These devices have a large starting torque, but a low tip speed ratio, and provide low power output when the size, weight and cost of the wind turbine are certain.
LThe Darrieux style wind turbine was invented by the Frenchman G.J.M. Darrieux in the 1830s. In the 1970s, the National Academy of Sciences of Canada conducted a lot of research on this subject and was the main competitor to horizontal axis wind turbines. The Darrieux wind turbine is a lifting device. The profile of the curved blades is a sail. Its starting torque is low, but the peak speed ratio can be very high. For a given weight and cost of the wind turbine, it presents a high ratio. output power. There are many types of Darieux type wind turbines in the world, such as Φ type, Δ type, Y type and H type, etc. These rotors can be designed in single-blade, double-blade, three-blade or multi-blade versions.
Other formsThe vertical axis wind turbine type has a Magnus effect wind wheel, which consists of a rotating cylinder. When operating in the air flow, the displacement force generatede is due to the Magnus effect and its size is the same as that of the wind turbine. the Magnus effect. Directly proportional to wind speed. Some vertical axis wind turbines use pipes or vortex generating towers to transform horizontal airflow into vertical airflow through housings or diffusers to increase speed. Sometimes they also use solar energy or burn some kind of fuel to transform horizontal airflow into vertical airflow.