Wind energy The kinetic energy generated by the flow of air. A transformation form of solar energy. Because solar radiation causes uneven heating on all parts of the earth's surface, the pressure distribution in the atmosphere is unbalanced. Under the action of the horizontal pressure gradient, air moves in the horizontal direction to form wind. The total reserves of wind energy resources are very large. The energy that can be developed by technology in a year is about 5.3X10^13 kWh. Wind energy is a renewable, clean energy source with large reserves and wide distribution, but its energy density is low (only 1/800 of water energy) and it is unstable. Under certain technical conditions, wind energy can be used as an important energy source. Wind energy utilization is a comprehensive engineering technology that converts the wind's kinetic energy into mechanical energy, electric energy, and thermal energy through a wind turbine.
Wind energy resources are determined by the wind energy density and the cumulative cumulative hours of available wind energy. Wind energy density is the wind power available to the windward unit area and is proportional to the cubic power of the wind speed and air density.