Wind Generators For Sale
We provide you with information and deals of Wind Generators
Wind Turbine Generator is a mechanical rotating machine which converts kinetic energy from the wind into mechanical energy and then converted into useful electrical energy. Due to environmental and economical concerns, wind turbine can be an alternative source of energy and, does not produce harmful green house gases. Wind turbines especially in wind farm, require constant winds with high speeds; wind velocity and mass is also accounted in.
Wind turbines are constructed to capture and harness the wind energy that exists in a location. Through Aerodynamic modeling, one can determine the optimum tower height, blade number and control system.
20% of the total cost of the wind turbine is attributed to the rotor parts, which houses the wind generator turbine blades for transforming the kinetic energy of the wind into mechanical energy.
34% of the total cost of wind turbine is attributed to the generator component, consist of the electrical dynamo, and regulates electrical components and gearbox; which converts the mechanical energy from the turbine to electrical energy.
15% of the total cost, concerns with the wind turbine that comes from the structural support component, which accommodate the tower and rotor yaw apparatus.
31% is attributed to other parts.
Wind Turbine Generators has impact on wildlife. Noise from the turbine may disturb certain hearing sensitive animals, birds and bats are often killed from collision of the blade. High quality wind locations are often far and inhospitable; creating obstacles in transmission logistics and maintenance. How ever wind turbine has much more favorable life cycle imparts than other alternatives.
Vertical Axis Wind Generator or Vertical Axis Wind Turbine (VAWT) is a type of wind turbine that has its rotor shaft position vertically. VAWTs do not need for towers because of this arrangement; generator and gear box are placed near ground level, which is more accessible for maintenance. VAWTs can also utilize wind from any directions. Drawbacks of VAWTs are some design produce pulsating pulse, affects reliability. Wind speeds are more slower at near ground level, so less energy is available to be harnessed by the turbine. Air flow near ground level and other objects can produce turbulent flow, which creates vibration, noise, and bearing wear which lowers reliability of the turbine. However when mounted on top of buildings, this can double the speed as the building redirects wind over the roof.
VAWT advantages:
VAWT disadvantages:
Due to declining natural resources such as fuel, people resort to alternative renewable energy resources. Wind power is one of the cleanest and most efficient alternative energy resources. Wind generators for residencial use are available commercially. They vary in size, model, price and output. All wind generators operates on the principle of using the kinetic energy of the wind, converting to mechanical energy and converting it to useful electrical energy.
Wind generators can save up to 50%-90% on electrical bill depending on several factors such as wind speed and generation output. Homes in United States use about 9,400 kilowatts-hour (kWh) of electricity per year. Depending on average wind speed in the area, a suitable wind turbine would be rated at the range of 5 to 15 kilowatts in order to make enough contribution to meet up the demand.
In buying a wind generator for home use, location is important; not suitable in urban and suburban area, an open area is required; wind generator is relatively a large device and a tower is needed. Also electricity price should be at least 10 cents/kWh. Wind speed is also important, recommended wind speed should not be below 7 to 15 mph.
Price range for wind generator is around $6,000 to $20,000 or more depending on model, size, output and service agreement by the manufacturer. Self installation is cheaper than manufacturer based installation providing you have knowledge on wind generator installation, however manufacturer installed are more hassle free and comes with support after the installation.
Wind generator blades are found on wind generators. They are responsible for harnessing the power of the wind. Connected to the motor, they can produce electricity. Wind generator blades are usually 3 blades ranging in size up to about 45 meters, depends on usage and model (smaller blades are used in residential while large blades are used in wind farms). The blades are made of different laminated materials; composites, wood, carbon fiber, metal, fiber glass, and PVC. Different materials have their own advantages; fiber glass has the highest strength-to-weight ratio compared to other material however it is expensive, while PVC and wood are cheaper and are preferred for homemade blades but quality may be compromised. Also different materials are preferred for different usage (home, industrial, farm). The blades molded into airfoils; to maximize the wind’s lift. Most commercial blades are protected against elements and lightning.
Generally, wind generator blades are designed to be wider at the base and narrower at the tips, since area swept by the inner portion of blade is relatively small. Different blades have different pitch and twist; more pitch will result into improved start-up and efficiency while less pitch is better at high performance. The blades twist affect the angle of the blade in which the wind will hit; common home made designs are even twist at 10 degrees at the root and 5 degrees in the tip. Blade balance is also important to prevent vibration; this is easily done on a two rotor blade than the three rotor one.
Home Wind Generator is a mechanical device that generates electricity from wind source. Home Wind Generator consist of a wind turbine that is mounted on a tower, connected to an electrical generator and can be attached to a battery or directly to the house power grid. Most modern Home Wind Generator does not need batteries and directly connected to the power grid. Home Wind Generator can typically reduce home electric consumption by 50%-90% and operates at not below wind speed of 7-10mph.
Home Wind Generators in the United States are installed in 47 out of 50 states, however the majority are installed in the Northeast and the Midwest Area. Residential wind generators are typically a large device and should not be installed in urban and suburban areas except for compact wind generators. When properly installed residential wind generators produce almost no noise or none at all and may not require maintenance. Most modern wind home generators will not require modification of house wiring. They are designed to last for up to 20 years depending on wind condition and operate automatically. The wind system can usually recoup its investments through energy savings within 6 to 15 years. Federal Regulation (Public Utility Regulatory Policies Act of 1978 or PURPA) requires the system to connect with and buy power from small (less than 80 MW) wind energy system.
Home Wind Generators are becoming popular due to environmental concerns and energy concerns. They can produce clean and free energy while reducing the need of power from commercial sources.
