Introduction : Wind power turbines come in handy in the market today. Vertical-axis wind turbine happens to be one of the most popular and widely coveted wind turbines. It is also more practical, reliable and cost effective has the best longevity and durability features. Therefore, you will be able to use it efficiently over a long haul. The turbine is also designed in a unique way that enables it to work efficiently in an urban and suburban area. They feature turbulent environs and this means that they yield greater fluctuations in terms of wind speed and wind direction. The shaft in the turbine rotates vertically thus providing enhanced performance in turbulent environments.
Wind Energy :The kinetic energy of the wind can be changed into other forms of energy, either mechanical energy or electrical energy.The kinetic energy contained in wind can be transferred to other objects, such as boat sails, or transformed into electrical energy through wind turbine generators.With the recent surge in fossil fuels prices, demands for cleaner energy sources, and government funding incentives, wind turbines are becoming a more viable technology for electrical power generation
How Wind Turbines Work?All wind turbines essentially work the same way with minor modifications depending on size and configuration.The wind turns the blades to spin a shaft which connects to a generator which produces electricity.Essentially the rotors harness the kinetic energy of the wind and coverts it into electrical energy.
Types of Axis :Horizontal Turbine : Higher wind speeds medium efficiency has to be moved into the direction of the wind very high power Efficiency – 18% to 20%
Types of Axis : Vertical Turbine : Can place generator on ground You don’t need a yaw mechanism Wind direction doesn’t matter, it adjusts to it its self. medium power Efficiency – 50% to 60%
Vertical Axis Wind Turbine : We make a “Giro Mill” type VAWT. VAWTs are rugged, quiet, Omni-directional. VAWT doesn’t create as much stress on the support structure. It can be installed on chimneys and similar tall structures. Popularizing the wind energy for domestic application.
Feature :The generator shaft is vertical to the ground.The blades point upward.The generator is mounted on a short tower.It can be installed anywhere because its compact size and simplified in design.The turbine starts rotating at 4m/s speed.The VAWT’s efficiency is around 50% to 60%.
Types of VAWT : Darrieus : H-Darrieus-Rotor
Advantages :Accepts wind from any angle - no yaw systemBetter answer to rapidly changing windsComponents can be mounted at ground level – Ease of service – Lighter weight towersVirtually silent operationHigh Mechanical stability.
Disadvantages :Rotors are generally near ground where wind is poorerPoor self-starting capabilitiesRequires support at top of turbine rotor sturdy constructionRequires support at top of turbine rotorOverall poor performance and reliability (although it is argued that it is mainly due to lack of research and development and not aerodynamics)
Conclusion : we done our literature survey on VAWT. And it has try to mentioned advantages, applications, limitations.And also it is understood that in the future most of our energy source will based on wind energy.We have to do this on small rating VAWT. The rating is 10watt.
References : Non-Conventional energy sources by smt. C.K.Rai Wikipedia Encyclopedia. Retrieved from http://en.wikipedia.org/wiki/Image:H-Darrieus- Rotor.png.jpg on November 28, 2005. Read some Papers on VAWT through Wikipedia http://www.urbanwind.net/pdf/technological_analysis.p df We have to use catalogue of ohms groups.