I think its Very Late to even think about it "WE SHOELD HAVE DONE IT"
i'm doing a school research for the physics subject . I chooses " Wind turbines " and the teacher asks as to calculate the power production and the energy ! i really have a hard time and i don't have any of wind turbines can someone help me ? 
The power available from an axial turbine (like an airplane propeller) is:
P = 1/2 x ρ x A x V3
where:
P = Power (Watts)
ρ = Air Density (about 1.225 kg/m3 at sea level)
A = Swept Area of Blades (m2)
V = Velocity of the wind
You then have to take into account the Betz limit. Obviously, if the turbine took all the wind energy and stopped the flow of air through the blades, then the power output of the turbine would also go to zero. Betz proved that the maximum theoretical limit is , and is 59% and described here:
http://en.wikipedia.org/wiki/Betz%27_law
with a proof here: http://www.windpower.org/en/stat/betzpro.htm
So, for you home work, use the first equation and take 59% to get the theoretical maximum power output from your turbine. Then state that a more realistic value will be about 20% lower for many reasons: propeller design, bearing friction and maybe with a little internet research, you can find other things that limit performance. Hint: do you let your wind generator self-destruct when the gales approach or do you shut down? Will it spin at all when the wind is 3 mph?
Have fun. If you like wind power, ask the school to get a copy of "Homebrew Windpower" for the science classroom.
A lot. I have heard between $25K and $50K, depending on size and if you want to sell any extra back to your power company. But that is hearsay. I do know they are big for any power level, and rather non-cosmetically-enhancing to a property.
And you have to remember the wind generators only start to work above a certain breeze level, and produce virtually no power at that wind level.
Now if you are blessed with 50 MPH gales 24/7/365 you will have reliable power. If you are like here, with occasional days of moderate winds, maybe 20 mph, and some of weak but gusty winds to maybe 10 mph, the generator will generate only small amounts of power.
Power varies as the square of the wind, I have read. So a 50 KW generator at 50 mph makes only 12.5 KW at 25 mph, and at 12.5 mph only 3.125 KW…not a lot these days, and a 3 mph breeze like we often have out here in the summer wold be producing only 'bout 200 watts…maybe 3 light bulbs.
Right now the wind is nice and calm, and so right now I would be in total darkness relieved only by my neighbor's area light…cloudy so not even stars.
And I would not be writing this at all. My computer would be down!
My local power cooperative did study on their own wind station, set up in a pass with lots of wind, and found it seldom made full capacity, and averaged only about some 20% of capacity in a really good location.
Wind power for your home? Unless you got really strong winds all the time, I would say don't throw away your electric meter! and have a deep wallet!
Wind Power is only good at places where you have frequent high wind speeds like Netherlands. It is not an effective measure of a constant source of power. But the power generated is very eco friendly and without any emissions however the power generated is never in huge value of Megawatts. It has its limitations ! The future is ofcourse not bad considering the stringent environmental regulations and statutory approvals involved , it can be a good source of captive power generation to people !
Nuclear, Thermal and Hydro power are the most reliable source of power actually !
Yes, but you only get to combine their energies when both sunlight and wind are available. If wind is calm or blowing the wrong way, the solar cells must do more work to carry the extra load of sail. If the sun ain't shining, the sails must drag the extra weight of solar panels. The best solution is to use the solar panels as sails when the wind blows and make them more streamlined when the wind is unfavorable.
. Energy from wind power is becoming an increasingly significant source of energy, considering that the price of oil is getting dearer. This is especially so for oil-deficient developing nations like India which meet their energy needs by importing oil. Providing facts and figures, analyze the opportunities and challenges that wind energy companies face in setting up wind farms in India.
Hi there, I work for one of the world's leading renewable energy consultancies. While my background is more technical in nature (I'm an engineer), I'll take a shot at answering your question.
Wind energy certainly is viable in many parts of the world without subsidy. We came dangerously close to finding out exactly how viable it would be this year in the U.S., when an extension of the Production Tax Credit (PTC) was extended into 2009 at the last minute as one of the "sweeteners" that got the $700 billion Wall St bailout passed.
http://www.nicholas.duke.edu/nicholas/insider/thegreengrok/the-700-billion-bailout-bill-goes-green-not-quite
The current subsidy for wind energy in the U.S. is PTC, which is a tax credit currently equal to 2 cents per kWh. The price for electricity varies significantly by region, so some regions are more closely tied to the PTC than others to make the economics of a wind project work out. For example, the price for electricity is only about 4.5 cents per kWh in the Midwest (e.g. Oklahoma, Kansas, North Dakota), so that extra 2 cent per kWh makes a huge difference. In other parts of the country (California, Hawaii, New England), the price of electricity is over 10 cents per kWh, so the 2 cent tax credit is relatively less valuable there.
The bottom line is that there are several places under development now in the U.S. that are good enough to justify being built without the 2 cents per kWh tax credit – these select locations are very windy, close to a transmission line, and/or in areas with high electricity prices. Without the subsidy, the growth of wind energy in the United States (same goes for the rest of the world, to my knowledge) would be severely affected. Thousands of people would be laid off, a significant portion of projects would be canceled, and we'd all go back to burning lots of cheap and dirty coal, nuclear, hydro, and finally natural gas to fill off the balance of our energy needs.
Regarding your question about oil imports in countries like India, I think you might be slightly misguided. Wind energy does not provide fuel for transportation, just electricity. Until we have a way to develop the hydrogen economy (http://auto.howstuffworks.com/hydrogen-economy.htm, convert electricity to hydrogen fuel, distribute it through a nationwide infrastructure we don't have, and put it in cars that are currently cost-prohibitive), we will remain addicted to oil. The alternative to oil (for now) is ethanol. Especially in places like Brazil, which have plenty of land and a great climate for growing sugar cane ethanol rather than the subsidized corn ethanol we produce here in the U.S.
Wind energy is the cheapest form of renewable energy currently available, and it will get cheaper in the coming years as the credit crisis corrects what has been a massive seller's market for wind turbines in the last few years. Competition in wind turbine manufacturing is up, and the cost of steel (the 80 m towers) and cement (the massive foundations) is down. These factors will lead to wind energy becoming cheaper in the next few years. Wind energy can be cost-competitive with natural gas, offsetting our need for this finite resource and (hopefully) lowering prices for consumers. That's the long-term benefit of the subsidy – get the industry built up now so we will be well set for a future of increasingly scarce oil and natural gas, which will be imported from unstable regions of the world.
Theoretically yes. Practically no.
any other benefits available for these projects
There is no carbon credit in the US. It's been talked about, but that's all.
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Waht is likelyhood of wind power as being an important source of energy in the next 3 to five years.
Like Bella just said. Wind power is already being used. One commercial example is, Sydney Water will use wind power to power it's new desalination plant.
http://www.sydneywater.com.au/EnsuringTheFuture/Desalination/pdf/RenewableEnergy.pdf
Wind power technologies are also still developing and will have a greater role in the future.
However, this being said. Wind power alone does not have the potential to replace current energy requirements. An effective combination of multiple green energy sources is required to meet energy demands. Green energy does have the potential to meet all our energy needs.
and is this storage of electrical energy harmful to us in a similar way as power generated through normal measures (such as oil and coal plants – known to cause tumors and birth defects) under high tension cables/power lines? If there is a storage plant for wind energy, what's the distance from a house that's considered safe? I'd love to install a wind turbine, so i figured to ask before installation.
First, it is not as efficient to produce any type of electricity in large quantities and then store it temporarily in batteries for later use. The capital cost of installing a large windmill would increase significantly if you also had to have a battery system sized to store the output. In addition, you would lose efficiency when you then had to conert the battery power back to alternating current and the associated equipment to perform that step. Therefore, most commercial or utility owned wind farms are directly connected to the utility grid.
Second, many studies have been performed and none have proved a link between electro-magnetic fields and the conditions you refer to above. But, since you are worried about the possibility, the fields drop off significantly as you move away from the source. While I don't have the software to calculate exact results, I will simply say that if you are 300 to 500 feet from the nearest transmission line, or 50-100 feet from the average residential line, the fields generated by the line will be significantly less than those that already exist in your house.
Since you are looking for a home installation, there is no way that the fields created by the amount of energy that you produce will even come close to the fields already created in your house. Standing directly in front of your windmill system would be no different than standing in front of your dishwasher.
Also, speaking about a residential system, I read about a good idea the other day that made sense to me. Hook up the windmill up to a buried or insulated water tank. The electricity from the windmill will power the element and heat the tank. Then, the water in the tank is like your battery storage. The water can then be used to supplement the cold water going into your water heater, or, if you have enough wind, you might be able to connect it to a radiant floor heating system. There would be other ways to do this and perhaps better ways to utilize the stored heat.
Check out James Dulley's website. I've included the link below and I think this is where I saw this. He may be using solar energy in his example instead of wind. Regardless, he has other solar and wind ideas that you may find interesting.
http://www.dulley.com/gtopics.shtml
