In one area. Yes.
Around the world. No.
Wind is going to occur somewhere as long as we have a spinning planet and an atmosphere.
Advantages of wind power:
Wind energy is provided ultimately by the sun and the rotation of the earth. The sun's radiation creates pressure differences in the atmosphere, and the rotation of the earth creates Coriolis forces. Together, these produce winds. Because wind energy comes from the sun and the earth's rotation, it is "FREE" in another aspect: it is completely non-polluting.
Wind power, delivered to where people need it, is not free of all cost however. This is because we must build expensive windmills to turn the wind energy into electricity, and transmission lines to get the power where we need it. Also, the environment in the immediate vicinity of windmills will suffer in various ways, and with the suffering is associated an additional cost. Arguably, however, the environmental costs are usually much greater for other modes of power production, such as coal fired thermal power stations. Wind power does not require the burning of fossil fuels (beyond initial manufacturing and installation) to create electricity.
Same as any other generator. The key part is a machine with magnets, and certain interactions between magnetism and electricity - basically, if a wire moves through a magnetic field, a voltage will be generated. You can read more details about this in any high-school physics book.
One wind turbine consumes about 20 square meters of land at its base. There are sometimes gravel roads that lead to them from the nearest road, usually 2-3 meters wide and 10-50 meters long, to allow maintenance trucks to get to them. Calling it 120 square meters per wind turbine of actual land taken out of use isn't far off.
That's about a tenth of a hectare or a quarter of an acre. The rest of the land is still useful for whatever it was being used for before, whether that was farming, hiking, growing weeds, snowmobiling, grouse hunting or just sitting there unused.
As a wind turbine will generally bring in a lease value of $5000 - $8000 per year to the owner of the land, and as that is higher than most crops will yield per acre per year, it's an excellent additional revenue stream, especially for the multi-revenue stream, small-business owners we call farmers.
As wind turbines are spaced 6-10 blade diameters apart, a gigawatt of power generation would be spread over about about 518 square kilometres, or about 200 square miles. It would take up about 0.01% of that land. If it were all compressed together, it would be about the size of a nuclear plant.
There's a US land use requirements reference at the link referenced.
Wind can greatly affect wildlife, especially turkey, deer, squirrels and rabbits living or being in the woods. the animals will "hold up" as us hunters call it because the animals can not hear incoming prey because of the wind.
Wind will not drastically affect plants because the seeds will grow almost anywhere and they get their food/nutrients from the ground.
When wind turns turbines, the turbines wheels turn belts, which in turn turns a generator. Inside the generator, a coil of copper spins between a couple of magnets. This creates an electrical field, which is made into DC current. The DC current passes through multiple rectifiers that convert the DC current into AC. AC is the type of current a typical household outlet uses. Then, the AC current runs to either your home or a power plant for distribution across several neighborhoods.
No, unless fossil fuel energy is used in their construction. In that case, wind turbines generate the amount energy required to make them within 6-12 months. That's the fastest of any type of energy - It takes a fossil fuel turbine about 2 years to generate the same amount of energy involved with it's construction.
Wind systems also consume fossil fuels when the wind is above the safe operation limit by placing power on the generators to prevent the blades from turning. They also consume power for a few minutes while starting to get the blades to the correct speed and sync with the grid. Despite these consumptions, wind is still a net provider of energy and they generate much more than they consume.
windmill or wind turbine
WIND ENERGY AND THE ENVIRONMENT
Wind energy is an excellent sustainable energy source, but no energy production is completely without impact on the environment. After all, even the slightest change in our surroundings has some effect, sometimes positive, sometimes negative. However, energy from the wind has very little impact on the environment for the following reasons:
WIND IS CLEANER
Many kinds of energy production produce harmful substances. For example, burning coal for energy yields sulfur dioxide, which causes acid rain. Wind energy helps offset traditional electricity generation's negative effects on the environment. Wind farms do not release any pollutants such as carbon dioxide (a greenhouse gas that contributes to climate change), sulfur dioxide (which causes acid rain) and nitrogen dioxide (which causes smog). By supplying power from a clean, renewable resource, wind energy helps reduce pollution, keeping our environment healthy for future generations.
WIND IS SAFE
Wind farms have many advantages for both people and animals. Wind farms are safe for animals on the ground, and since wind farms take up a very small percentage of land on which they are sited, most of the land can remain in use for crops or grazing. There are regions in the world in which wind farms can have an adverse impact on birds. However, many studies have been done in the United States and Europe on birds and wind turbines. Most of these studies have shown that birds tend to change their flight path in order to fly safely past the wind turbines. Nevertheless, at Horizon Wind Energy we always take into account bird migratory routes or flywayswhen siting our wind farms to prevent avian difficulties. We also take into account nesting grounds and other bird-related issues.
To read our Corporate Environmental Policy, click here.
For more information about wind energy and the environment, visit the American Wind Energy Association website.
Yes. Wind Energy once installed creates no Carbon Dioxide. Carbon Dioxide is a pollutant causing global warming, so wind turbines and any renewable energy are a good idea.
Wind Turbines create low cost energy, but it should not be considered free. Their large capital cost means the electricity produced from Wind turbines is much more expensive than other forms of electricity generation like coal and gas.
Also, because of the variability of wind, conventional power plant of equal capacity must be constructed and then operated at less than optimum capacity.
Storage using batteries, flywheels or pumped storage hydroelectricity can address this variability but it only adds to the cost.
Some people think that wind turbines are a bad thing because they make noise. Occasionally, birds fly across the path of the spinning turbine blades and are killed.
An average onshore wind turbine with a capacity of 2.5-3 MW can produce more than 6 million kWh in a year.
Many residential wind generators are relatively simple to install, but in many cases it is best to hire an electrician. The process can take up to four days and it is best to very carefully follow the instructions that come with the product.
In short: no.
Geothermal energy harnessing is still in its infancy compared to wind energy, and therefore, more expensive. Overall geothermal energy has been done on a very small scale, but technological breakthroughs need to occur before it can be successfully worldwide.
Then again, with the U.S. energy industry being deregulated, wind energy can be more expensive than other energy types. For instance, when I lived in western Arkansas, I used OG&E as my energy provider, and they offered wind power for just 4.5 cents per kilowatt hour, which was half of a conventional plan. In Texas, providers generally charge 2 cents MORE per kilowatt hour for using purely wind power than conventional.
the smallest turbine is in thatipur
A chicken/rooster with N-E-S-W on it.
Simplest wind direction indicator could be just a piece of string hanging from a nail.
But... simplest wind *vane* would be a horizontal rod balanced at and freely rotating around a vertical axis. One end of the rod has a thin, stiff vertical vane wider than the rod. It looks like a side ways stick with a stiff up and down flap at one end, that sick is on top of an up and down stick which is close to the middle of the side ways stick. Wind pushes against the vane and turns the stick so the vane is in opposite direction from where wind is coming from.
A wind vane can have other useful and decorative additions. The simplest is to paint the end or the vane so it can be seen easier. Many vanes look like an arrow with the vane with a shallow V shaped notch at its free end and an arrow head at the other end of rod, the head has to be smaller than the vane or the wind will push on it instead. The head and vane can be different colors. Below the arrow a horizontal non moving 4 armed cross with letters indicating the appropriate direction may be secured to the vertical support. Many vanes have a decorative feature on top of the horizontal rotating rod. The decoration is usually a thin vertical silhouette and has to be placed so as not to interfere with action of the vane. A rooster is a traditional and well known image but others are used, horse breeders may use a horse, dog breeders a dog, fishermen a fish etc. or some fanciful image with no real meaning can be used.
The arrow shaped rod with a rooster on top and above the directional cross piece is the traditional stereotypical American wind vane.
Some vanes have a propeller on one end as the wind catcher or a small one on end opposite the wind catcher.
The smaller or arrow end of a vane points in the direction the wind is coming from and winds are named for that direction. A North wind comes from the North. An ill wind blows no one any good, can come from any direction and can rarely be identified by a wind vane in time to prepare for it anyway.
I coulda saved a lot of time by telling you to go to Google Images. But I wouldn't have had as much fun trying to describe a windvane.
Generally speaking wind is not the only ingredient in a full capsize, a boat may be heeled over perhaps to a point where the mast may almost touch the water, at this point the force of right moment in the weight of the keel takes over to keep it from capsizing, also as the mast goes farther over the wind begins to spill off the top of the mast, reducing the forces on the mast and tendancy for a complete capsize. Large waves, especially breaking waves will have more of an effect on flipping a keeled sailboat that perhaps becoming beam or sideways to the waves .
Ceiling fans are definitely not a waste of energy.
Ceiling fans use very little electricity. Use them to circulate air in the house, to make the house feel cooler. By doing this, the thermostat setting for your air conditioner can be raised to 85°F, and still maintain the same comfort as the lower setting.
[From The Home Energy Saver a webpage from the Berkeley Lab website.]
If you only use ceiling fans in the rooms that you are in, then it will save a bundle. Just remember to turn the fans off when you leave a room. You can also buy motion sensors that will turn lights or fans on automatically.
Wind energy (Kinetic) is transformed into electrical energy (Potential) with the use of a turbine-generator. The wind turns the blades of a wind turbine. These blades then turn a generator, something which uses magnets (specifically magnetic flux) to create electrical energy. As electrical energy is a form of Potential energy, the energy has been converted from Kinetic energy (the turning of the blades) into Potential energy (also known as "voltage") by the generator.
A generator is a coil of wire surrounded by magnets. When the coil spins or the magnets spin, electricity is created. You need something to cause it to spin. In your car the gas engine does. At a hydro-electric dam, falling water that drives the turbines' blades. At a coal-fired power plant, expanding steam drives the turbines which in turn drive the generators. And in a wind generator, the wind turning the propeller blades drive the generator.
A wind generator makes electricity just like any generator: the fan blades drive a turbine which turns the generator. The amount of power (wattage) produced depends on several things including the speed of the wind, the size of the propeller blades and the size of the generator.
It is the same process, just a different power source.
A wind turbine - as any turbine, is an energy converter. It converts wind energy into mechanical energy and then electrical energy. Some so-called direct-drive turbines use magnets to keep it running even when there's no wind. Now direct-drive turbines are used. The number of blades do not matter (too many blades = too much turbulence), The span of the blades make more power. That's the smarter way to make more power. In 1985 blades had a span of 30 ft. Now they get to over 200 ft.
In America, the first recorded weather vane maker, Shem Drowne of Boston, began hammering out silhouettes in the early 1700s. Soon, weather vanes were popping up all over the Colonies.
shem drwne invented the first wind vane (recorded in the us)
Wind vanes have been known for milennia, who first though of the idea is not known.
The Tower of the Winds on the ancient Roman agora in Athens once bore on its roof a wind vane in the form of a bronze Triton holding a rod in his outstretched hand, rotating as the wind changed direction. Below, the frieze was adorned with the eight wind deities. The eight metre high structure also featured sundials, and a water clock inside dates from around 50 BC. The wind vane evolved from a Triton to a weathercock as the Roman Empire converted to Christianity. Many churches have a weathercock on the tower or spire. The cock refers to the fall of St Peter and to intimate the necessity for watchfulness and humility.
The difference between the two turbines is that in the pitch of the blades can be changed in the Kaplan in order to improve the results of the process, unlike the Propeller turbine, which is not capable of that.
Some windmills were made to grind flour others were made for other purposes.
Most wind turbines are located in Australia as of 2010. There are many other places which use wind tubines but Texas is the main source.
Wind turbines can be located anywhere there is enough room to place them and no danger to populace.
The preferred locations are sufficiently windy and have largely constant winds, e.g. exposed high areas, like hills or small mountains or coastal areas, some wind turbines are even placed off the coast.
The limiting factors in the placement of wind turbines are the price and ease of transport to that area, the infastructure of the area and assembling the turbines.
We wouldn't have any wind energy!
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