Vertical axis wind turbine is a type of wind turbine that has its rotor shaft installed vertically and can therefore work even if the turbine is not directly pointed to the wind. This ensures wind power even in areas where there is low wind speed. There are many types of these turbines. These include the eggbeater type turbines, the Gorlov helical turbine, the Savonius wind turbine, the Giromill, the variable geometry wind turbine, and the Lenz wind turbine. With the growing popularity of these Turbines, there is now a need to identify the advantages and disadvantages that are attached with the use of these structures.
Vertical Axis Wind Turbines, more commonly referred to as VAWTs, have the generator and gearbox assembled near the ground instead of these parts being supported by a tower. This proves to be advantageous especially considering maintenance purposes. Part of the disadvantage of using a wind turbine is the difficulty of setting up a tower to put it up. With these turbines, there is no need for tower structures. They also have parts which are easier to maintain. Because they have a high airfoil pitch angle, they also have increased aerodynamic systems and decreased drag during low and high pressure systems. They are less likely to break down and collapse during high winds. There are areas where horizontal axis wind turbines may be prohibited. In these areas, Vertical Axis Wind Turbines may be the alternatives. They also take advantage of areas like hilltops and ridge lines which funnel the wind for a higher wind velocity.
There are a also few disadvantages. First, most of the turbines of this type only has an energy-producing capacity which is fifty percent less efficient than those produced by horizontal axis wind turbines. Because there is no tower structure required, they cannot take full advantage of the higher wind speeds that are available on higher, elevated locations. They also require energy to start the turning of blades due to their low starting torque. They will have parts which are difficult to change without disassembling the entire turbine should it not be assembled properly. Another disadvantage of the Vertical Axis Wind Turbines is that they require wires to hold the structure in place. This puts stress on the bearing because all the weight of the rotor rests upon it. To solve this problem will require a massive structure that will hold a bearing on top that will get rid of the downward wind thrusts that put pressure on guy wired structures.
Do you know that plenty of people are now using solar power and wind power for their home?
Go to http://www.FullEarth4EnergyReview.com to know more on the top step-by-step and friendly guide that you need to use solar and wind energy.
