Power Generation by using Horizontal Axis Wind Turbine
I.0 INTRODUCTION R enewable Energy Sources are those energy sources which are not destroyed when their energy is harnessed. Human use of renewable energy requires technologies that harness natural phenomena, such as sunlight, wind, waves, water flow, and biological processes such as anaerobic digestion, biological hydrogen production and geothermal heat. Amongst the above mentioned sources of energy there has been a lot of development in the technology for harnessing energy from the wind. Wind
... rom the wind. Wind is the motion of air masses produced by the irregular heating of the earth's surface by sun. These differences consequently create forces that push air masses around for balancing the global temperature or, on a much smaller scale, the temperature between land and sea or between mountains. Wind energy is not a constant source of energy. It varies continuously and gives energy in sudden bursts. About 50% of the entire energy is given out in just 15% of the operating time. Abstract: A wind turbine is a device that converts kinetic energy from the wind into electrical power. The term appears to have migrated from parallel hydro electric technology (rotary propeller). The technical description for this type of machine is an aerofoil powered generator. The result of over a millennium of wind mill development and modern engineering, today's wind turbines are manufactured in a wide range of vertical and horizontal axis types. The smallest turbines are used for applications such as battery charging for auxiliary for boats or caravans or to power traffic warning signs. Slightly larger turbines can be used for contributions to a domestic power supply while selling un used power back to the utility supplier via the electrical grid. Arrays large turbines, known as wind farms are becoming an increasingly important source of renewable energy and are used by many countries as part of a strategy their reliance on fossil fuels. Horizontal axis wind turbines (HAWT) have the main rotor shaft and electrical generator at the top of the tower, and must be pointed into the wind. Small turbines are pointed by a simple wind vane, while large turbines generally use a wind sensor coupled to a servo motor. Most have a gear box which turns slow rotation of the blades into a quicker rotation that is more suitable to drive an electrical generator.