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# WIND POWER

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### WIND POWER

1. 1. WIND POWER • BHATT PARVAM • GOHIL MEHUL • BHARVAD RAVI • DESHANI KIRTAN
2. 2. WIND POWER Q. Where Does The Wind Come From?  The wind Is a by-product of solar energy.  Approximately 2% of the sun’s energy reaching the earth is converted into wind energy.  The surface of the earth heats and cools unevenly, creating atmospheric pressure zones that make air flow from high-to low-pressure areas.
3. 3. WIND POWER  Equation Of Wind Power  The amount of power available in the wind is determined by the equation: w=1/2 r A v3  W is power, r is air density, A is the rotor area, and v is the wind speed.  This equation states that the power is equal to one-half ,times the air density, times the cube of the wind speed. Air density varies according to elevation, temperature and weather fronts
4. 4. WIND MILL :-
5. 5. WIND TURBINES  Defination  Rotary engine in which the kinetic energy of a moving fluid converted into mechanical energy by causing a bladed rotor to rotate.  Wind rotates the turbine blades:- 1. Spins a shaft connected to a generator 2. The spinning of the shaft in the generator makes electricity.
6. 6. WIND TURBINES  Classification  There are two types of wind turbines 1. Horizontal axis wind turbine (HAWT) 2. Vertical axis wind turbine (VAWT)
7. 7. HORIZONTAL AXIS WIND TURBINE (HAWT)  INTRODUCTION  This is the most common wind turbine design.  In addition to being parallel to the ground, the axis of blade rotation is parellel to the wind flow.  Some machines are designed to operate in an upwind mode, with the blades upwind of the tower. In this case, a tail vane is usually used to keep the blade facing into the wind.  Other designs in a downwind so that the wind passes the tower before striking the blades.
8. 8. HORIZONTAL AXIS WIND TURBINE (HAWT)  TYPES 1. ACCORDING TO NUMBER OF BLADES a) MONO BLADES b) TWIN BLADES c) TRIPLE BLADES 2. ACCORDING TO POWER OUTPUT a) SMALL CAPACITY= 10-50KW; ROTOR DIA. 1-16 METERS. b) MEDIUM CAPACITY= 50-500KW; ROTOR DIA. 16-50 METERS. c) LARGE CAPACITY= 500-1000KW; ROTOR DIA. 50-130 METERS.