DIY Green Energy For Homes

Wind Power Information

Wind power is a form of solar energy that involves the generation of electricity from wind. It is an excellent power source for remote power applications where the grid can not reach.

Wind power generation basically depends on wind speed of an area. Wind speed varies greatly, and the maximum amount of power that a turbine can generate is not necessarily a direct multiple of the average value of wind speed.

How power is generated from wind

The principle behind wind power is the conversion of kinetic energy into a usable form using turbines. Basically, a generator is connected to blades that have airfoils built in a way that enables them to trap wind.

The rotating blades, attached to the generator, create rotational momentum in a shaft, using the kinetic energy from the trapped wind. The shaft will spin the alternator, which in turn generates electricity. The wiring in the tower transmit’s the electricity to its intended destination for use.

The wind turbine

Wind turbines are divided into two basic groups: the horizontal-axis type, akin to the classic windmills used to pump water, and the vertical axis type, for instance the ‘egg-beater’ Darrieus type. Larger, modern wind turbines are mainly horizontal axis type.

A turbine consists of blades (rotor), a tower, a drive train, electric cables, support equipment and control equipment. A large power plant usually consists of various turbines grouped together, called a wind farm, which generate power in bulk, which is supplied to the grid and distributed to consumers.

Of course, most residential homes in a windy location could also consider the use of DIY wind generators with a wind turbine kit that you can purchase in a store near you.

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Turbine rating and size

Unlike solar or hydro-electric turbine rating, wind turbine rating is not as predictable, because output depends on particular wind speed, where every manufacturer uses different wind speed to rate turbine output. Thus, the rated output for a turbine can be a misleading figure.

However, turbines come in a range of sizes, with some having blades spanning 100 metres in length and towering up to 20 storied- buildings high, capable of generating enough electricity for 1400 homes.

A smaller turbine’s rotors will typically be 8 to 25 feet in diameter and tower above 30 feet high, able to power a home or a small commercial setup. Utility-scale turbines vary in size from 50 to 750 kilowatts .

What are the pros and cons of wind power?

Wind power is the least costly of all the forms of renewable energy. Generation costs stand at about 5 cents per kilowatt hour, and this is projected to go further down as with improved technology. A large chunk of the costs for wind power is in installation. Once the system is up, there are little maintenance costs.

Wind power is extremely clean, with no carbon emissions, and being a renewable source, there is no depletion of the natural resources, unlike other forms of energy, e.g. oil, gas, among others.

On the other hand, while wind power is a sustainable alternative, there are still a few hurdles that hinder its full exploitation. Initial costs are still prohibitive for many, although generally, the costs have been declining.

Equipment and machinery take up almost 80 percent of the initial cost, with the rest going into site preparation and installation. However, maintenance costs are comparable to other electricity technologies. If you are interested to build a homemade wind turbine and save on your ultilities bill, click the link below...

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