Not all houses with windmills are power plants. They are also used to grind cereals, coarse salt, tobacco leaves, press oil, roll woolen fabrics, felt, make paper and drain swamps. . Stagnant water. A wind turbine is an electrical machine that does not require fuel and uses wind as energy. The first wind turbines were also called windmills. Modern wind turbines mainly refer to wind turbines used for electricity generation and are also used to lift water for irrigation. Ancient windmills developed from sails. They had 6-8 sail-shaped canopies, distributed around a vertical axis, when the wind blew they rotated around the axis like a rotating lantern. Due to its low efficiency, this type of wind turbine was gradually replaced by wind turbineshorizontal rotating shaft wood fabric and other wind turbines, such as vertical wind turbines, automatic rotor wind turbines, etc.