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Frequently Asked Questions

What is Wind Electricity?
wind energy is a dynamic if invisible resource—the energy available in a moving mass of air. From grain grinding by simple wind-driven machines in ancient cultures to modern electricity-generating devices, the wind has been tapped to work for us. Wind is a cubic energy resource. As the wind speed increases, the power available increases cubically. This means that it’s very important to get into higher wind speeds, and the way we do that is with taller towers. Regardless of the turbine or tower type, going higher is the tried-and-true, reliable way to increase performance in a wind generator. And the most common mistake in wind electricity is installing a turbine on a short tower.
Why Use Wind Power?
People choose to use wind energy for a variety of reasons, including perhaps the most important one—they want to! More specific motivations include environmental, financial, independence, reliability, and social.

Energy and our energy choices have a huge impact on our physical environment. More than half of the electricity used in the United States is generated by burning coal. This coal is sourced by strip mining, pit mining, shaft mining, and mountaintop removal. All of these methods of extraction, and the burning of coal, have a deleterious effect on the ground, water, and air, not to mention the health of workers and nearby residents. Other major sources of electricity nationally are natural gas and nuclear energy, both of which have environmental damage and risk involved in fuel extraction and use.
How to Use Wind Power
Four basic types of wind-electric systems are possible, and three are common. Perhaps the simplest type is wind-electric water pumping, which couples a wind generator to an electric pump, usually via electronics. This may be a viable system type when remote water pumping is needed in a windy area. But few if any complete system packages are available for this application, and the need is most often served with wind-mechanical (water-pumping windmill) equipment and solar-electric systems. Direct heating systems are also possible, but typically end users want to do more with their systems than solely heat, and also don’t need heat year-round, so the energy is less useful
Advantages of wind power:
Wind power is very low cost (after the initial production and installation)
Wind power is clean (no pollution or carbon dioxide after the initial setup, apart from the comparatitainable resource. We can use as much as we can today and there will still be more tomorrow.
Wind power will become cheaper than fossil fuel in the next few years (when the price of carbon is added to coal and oil), and in many places already is.
Wind turbines are self sufficient, just place them and watch 'em spin! (low maintenance, few moving parts, easy to repair)
Many people view wind turbines as aesthetically beautiful additions to the landscape.
Wind prices won't inflate like today's gas prices.
The land beneath can still be used for farming or any other purpose it was used for prior to a wind turbine being erected.
(For the US) At the moment we get our fuel (fossil fuels, mainly oil) from other countries. What would happen if one day they decided to cut off our power? Wind energy reduces US dependence on unstable, oil-producing countries.
How much power per year does a 1.5mw wind turbine generate?
The power of a 150-megawatt wind turbine is 150 megawatts, or 150 million watts.
The energy it generates is 150 million joules per second, or 150 thousand kilowatt-hours per hour.
1 day = 86,400 seconds
1 year = 365 days (rounded)
150 million joules per second = (150 million x 86,400) joules per day = (150 million x 86,400 x 365) joules per year = 4.7304 x 1015 joules of energy per year (4,730,400,000,000,000 joules of energy per year)
If we convert this number to the more familiar unit that appears on your electric bill, it's equal to 1,314 million Kilowatt-hours of energy per year

Income from Wind Turbines

Energy Output from a Wind Turbine

The annual output of a wind turbine is quite straightforward to calculate. It is based on the average wind speed, the average air density, the rated output of the generator and the length of rotor blades. The graph shows how annual energy production in million kilowatt hours varies with the windiness of the site. When it comes to choosing a site, the energy output can will be proportional to the average wind speed at the height of the turbine. For instance, a mean wind speed of 6.75 m/s would generate approximately 1.5 million kilowatt hours (kWh) of energy per year.

Energy output will vary roughly along the line of the cube of the wind speed. Exactly how sensitive the energy output of a turbine is to changes in wind speed varies with the wind probability distribution (see Weibull distribution).

Rated power 1500 kW
Cut-in wind speed 4 m/s
Rated wind speed 14 m/s
Cut-off wind Speed 20 m/s
Survival wind speed 52.5 m/s

S82-1.5 MW

The S82-1.5 MW has a well-suited ratio between rotor diameter and generator for most sites in a medium wind speed regime. The wind turbine concept is based on robust design and is efficiently handled by the Suzlon controller. These technologies are all well-known in the wind power industry and have proven themselves over time.

Wind Capacity in India ( State Breakdown)

1. Tamil Nadu 4900 MW
2. Maharashtra 2077 MW
3. Gujarat 1863 MW
4. Rajasthan 1088 MW
5. Karnataka 1472 MW
6. Madhya Pradesh 230 MW
7. Total 11800 MW

Note the above capacities are till March 31,2010 and since then the wind capacity has risen by another 1200 MW to reach 13 GW.According to MNRE a total capacity of 13284 MW has been established up to February, 2011, mainly in Tamil Nadu, Gujarat, Maharashtra, Andhra Pradesh, Karnataka and Rajasthan. Wind electric generators of unit sizes between 225 kW and 2.1 MW have been deployed across the country.