Wind powered turbines are one of the most trusted kinds of alternative power sources on the planet. Wind powered turbines are made to generate energy by transforming the kinetic energy of the wind into mechanical energy, which is then either used directly (in the case of windmills, for example, which were used to make flour from grain, or to pump water for crops) or connected to a generator that creates a DC output that can be used in a more general sense. In this commentary we will be talking about the type of wind generators that output electric power, as this is the most useful to us in our daily lives.

Wind turbines are basically large windmills, with huge blades that turn as a result of the wind and manufacture energy by converting the winds energy. Wind turbines are constructed from fiberglass, aluminum, steel and various other exotic metals.

Wind generators have a few negative impacts on the environment. They are very visible, and quite unsightly since they must be put in proximity to windy, open terrain to be feasible - recent attempts to position them offshore have been greeted with incredible success. Wind Turbines require a large amount of energy in their manufacture, energy which is fossil-based, and therefore it takes a considerable time before they are beneficial in terms of greenhouse gas emissions - this period can be anywhere from three to five years. Turbines are often associated with the mauling of rare species of birds that can be killed as they pass through the turbine fans during transitory passages.

With all of the downsides aside, wind turbines should be a logical inclusion when thinking about a broad plan for sustainable energy. Once up and running, wind turbines are very efficient in a larger sense - they generate power from a green, sustainable renewable resource, without the hidden social or environmental costs that we incur with the burning of fossil fuels - theres no need to mine for the fuel or to transport it - there are no byproducts generated, and no need to store, process, or to dispose of wastes.

At the low side of the spectrum, turbines can be as tiny as five feet in diameter and might be capable of only a few hundred watts. At the high end of the scale, turbines can be as massive as 200 feet in diameter and are capable of generating 3 to five megawatts of power.

Similar to photovoltaic solar electricity generation, there might be funding available for construction, and power in excess of that which we are utilizing can be sold back to the power company.

Wind speed is affected by the local topography and increases with height above the ground, so wind turbines are usually mounted on large towers. In a typical application, the wind turbine sits atop a tall tower and generates DC that is used to charge batteries - this stored power is ultimately utilized by flowing it through an inverter which converts the low voltage DC power into higher voltage AC energy that can be used in household applications. By concentrating a lot of turbines into wind farms a massive amount of power can be stored and harnessed, perhaps for a whole city or town.

Because the wind does not blow all of the time in many areas, wind turbines are used in hybrid configurations with many different technologies like photovoltaic panels, and diesel generators to generate a constant source of power.

Unlike fossil-fuel power stations, wind turbines are clean - they dont manufacture the CO2 emissions that are thought to be causing greenhouse gases or the sulfur dioxide emissions that cause acid rain.

Modern wind turbines are divided into two categories, namely horizontal turbines and vertica turbines. Todays horizontal axis wind machines are actually far better at capturing the wind than vertical axis machines given the same amount of swept area (i.e. the size of the circle traced by the tip of the blades).

Article Source: http://www.energyefficienthomearticles.com

Peter is a contributing editor to Fuzing.com. This article is proudly brought to you by trade leads from the Fuel Cell section of our Business to Business Website.

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