The length of the air column passing through the effective windward side of the wind turbine per unit time is v, then the mass of air passing through the unit time is ρsv. This part of the air kinetic energy will be converted into electrical energy by eta, so each wind turbine generates electricity per unit time The power generated by the generator, that is, the power P is ηρsv^3/2
The effect of wind direction on the wind farm
It is a resistance wind turbine, which relies on the difference between the windward side resistance and the leeward side resistance to obtain power. The larger the difference, the higher the efficiency of course (streamlines and continuous shapes avoid energy loss due to air disturbance). The system has high stiffness, a thin rotating axis, and friction resistance (small friction circle). Its linear speed is always lower than the wind speed, and the transmission inertia is small. , the speed stability is not good, which can be improved through a mechanical system similar to a flywheel. Efficiency is related to resistance area and surface smoothness.
How do wind turbines generate electricity?
The wind direction has an important parameter icon called the wind frequency rose diagram, which is an important indicator to consider the quality of the wind field. The wind direction plays a very important role in the wind farm. If the wind frequency diagram shows The frequency in the main wind direction is very high, which means that the efficiency of the wind farm unit is relatively high, reducing the impact of wind direction fluctuations on equipment and power generation. As follows:
I think: This is the science of wind turbine design.
1. Very small damping and very little power can make it run.
2. The shape of the propeller blade is scientifically designed on the windward side.
3. Due to the large area of the propeller and the super height of the wind turbine, even if you don't feel the wind at low ground level, it does not mean that there is no air flow at high altitude.
To sum up, wind turbines can operate even when you feel there is no wind.