WIND POWER All renewable energy (except tidal and Geothermal power) , ultimately comes from the sum The earth receives 1.74x10 17 Watt of Power (Per Hour) from the sun. About one or 2 percent of this energy is converted to wind energy ( which is about 50 – 100 times more than the energy converted to biomass by all plants on earth.
Wind Power Winds are influenced by the ground surface at altitudes up to 100 meters. Wind is slowed by the surface roughness and the obstacles. The amount of energy which the wind transfers to the rotor depends on the density of the air, the rotor area, and the wind speed. The kinetic energy of the moving body is proportional to its mass (or weight). The kinetic energy in the wind thus depends on the density of the air.
Wind Mill Design A windmill captures wind energy and then uses a generator to convert it to electrical energy. The design of a windmill is an integral part of how efficient it will be. When designing a windmill, one must decide on the size of the turbine, and the size of the generator.
Wind Turbine A wind turbine is a device that converts kinetic energy from the wind into the electrical energy. There are two types of wind turbine – Horizontal Axis wind Turbine, Vertical Axis wind Turbine.
Wind turbine : Number of blades Most common design is three-blades turbine. The most important reason is the stability of the turbine. A rotor with an odd number of rotor blades ( and at least three blades) can be considered to be similar to a disc when calculating the dynamic properties of the machine. A rotor with an even number of blades will give stability problems for a machine with a stiff structure.
Wind turbine generator Wind power generators convert wind energy (mechanical energy ) to electrical energy. The generator is attached at one end to the wind turbine, which provides the mechanical energy. At the other end, the generator is connected to the electrical grid. The generator needs to have a cooling system to make sure there is no overheating.
Wind Power in India As of May 2024, India is ranked fourth in the world for wind power production capacity and renewable capacity. By the end of 2022, wind contributed 35% of India’s total renewable energy installed capacity, wichh was 121GW. India’s wind Industry has a strong ecosystem, manufacturing base, and project operation capabilities. The country has also developed around 15GW of domestic wind manufacturing capacity.
STATE CAPACITY (in MW) Tamil Nadu Maharashtra Gujrat Rajasthan Karnataka Andhra Pradesh Madhya Pradesh Kerala Others Total 1,21,000
Advantages and Disadvantages Advantages Disadvantages Renewable energy. Reduces Fossil Fuels consumption Less Air and Water Pollution Initial Cost Noise disturbances Threat to wildlife Wind can never be Predicted Suited to particular region.
Future of wind energy
Conclusion Even though the cost of wind power has decreased in the pas 10 years, the technology requires a higher initial investment than fossil fuel solutions for power supply. Major challenge to using wind A source of power is that the wind does not always blow when electricity is needed. Wind turbines can be built in rural areas, thus benefitting the economy there. Wind energy is one of the lowest price renewable energy technology available today. It has been estimated that wind power could supply on third of the world’s electricity by 2050.