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Wind turbines, just like windmills, harness the energy of the wind to do something useful. Early windmills were used to grind grain and pump water and many still do today. Modern wind turbines are used to generate renewable energy in the form of electricity.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoA very Modern HIGH TECH wind turbine would be about 40-50% efficient in converting the winds kinetic energy into mechanical energy in the turbine. Then of course, the generator would be 90-98% efficient for a VERY efficient generator. The German physicist Albert Betz that the maximum efficiency of converting wind kinetic energy to mechanical energy is 59%. This number was derived from a lengthy and accurate physics calculation. This limitation is due to the 2nd Law of Thermodynamics. Think of it this way, if all the kinetic energy of the wind has to go to the wind turbine, then all the wind particles would loose all their kinetic energy and stop completely. The wind particles would just build up and stop more wind from flowing past if this was true.
A heat engine is similar but the efficiency increases as the temperature of the engine increases relative to its surroundings. That is why bigger engines (think power stations) are more efficient, because they can run at higher temperatures.
Wiki User
∙ 11y agoOnce you take away the wasted fossil fuel for plants on standby, the cost of maintenance and the inefficiencies associated with the wind turbines of today you end up with about 5% of rated power. Even when running they average 8% of rating.
A 1 million watt system will typically generate about 80,000 watts of power each hour. This is further offset when you add into the equation that a power plant is running in the background to supply the backup power as wind velocities change.
Once everything is added up they produce less power then it takes to build a unit.
This depends how large the wind turbine is and how windy the area is. Large wind turbines generate between 700kilowatts and 1.8 megawatts per hour, depending on how much wind there is at the time.
Wiki User
∙ 11y agoAbout four hundred-trillion-trillion ergs. Most of those ergs are converted into the parts (fan blades, generator, pivot, tower, etc.) . The balance is utilized in the assembly of the parts into the finished wind generator.
Wiki User
∙ 11y ago"Energy efficiency" is not a term applied to certain types of energy - rather, to energy conversion processes. For example, if you invent a process that harnesses energy from waves, and this process converts a certain percentage of this energy into useful work, wasting the remaining percentage, the percentage of energy used would be the energy efficiency.
Wiki User
∙ 13y agoYes, they are energy efficent. But they are not totally practical; they are so noisy, and can kill birds etc.
Wiki User
∙ 14y agoWind Tamer is the most efficient to my knowledge.
Wiki User
∙ 14y agoThe efficiency of a Turbine, is roughly 40%.
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What is wind wind energy's weakness?
The problem with wind energy is that it is usually generated via wind turbines. Wind turbines take a lot of energy to make, and unfortunately, it uses more than it will generate in it's lifetime.
What is the defintion of wind energy?
Electricity derived from wind action. So windmills or wind turbines which rotate when there is wind present generate electricity.
What do wind turbines generate?
electricity.
What is the US's ranking in the world for generating electricity from wind?
As of mid 2008, the U.S. is first for generating electricity from wind turbines, before Germany and Spain. the wind turbines get winds kinetic energy and generate it into electricity.
How do Wind turbines capture wind?
The wind turbines collect the wind's kinetic energy.
What are wind turbines made?
Wind energy is made by spinning turbines. The wind spins the wind turbines and they generate energy.
What are the differences between hydroelectric energy and wind energy?
Hydroelectric energy uses water to turn large turbines in damns to generate electricity, while wind energy uses wind to turn wind turbines to generate electricity.
What is wind wind energy's weakness?
The problem with wind energy is that it is usually generated via wind turbines. Wind turbines take a lot of energy to make, and unfortunately, it uses more than it will generate in it's lifetime.
How are wind turbines transported?
Energy can not be created or destroyed but only changed from one form to another. Wind energy is changed to mechanical energy of the turbines. The turbines can then generate electricity.
How does wind power produce energy?
They are used to turn the blades of large wind turbines, which generate electricity.
How is electricity produced from wind cycles?
Well when it goes through the wind turbines it causes energy to generate. And that's how energy is produced!
What is the environmental cost of using wind turbines?
Wind turbines generate energy using wind power. This does not affect the surrounding environment, therefore their environmental cost would be minimal.
What is the defintion of wind energy?
Electricity derived from wind action. So windmills or wind turbines which rotate when there is wind present generate electricity.
Is wind a fossil energy?
Sort of.Wind turbines generate electricity,wich is a fossil fuel.
How much of our energy comes from wind energy source?
Actually, most of our energy comes from wind energy sources, like wind turbines. Wind turbines are used all around the world.
What do wind turbines generate?
electricity.
What are the white fans that make electricity called?
The white fans that make electricity are called wind turbines. Wind turbines are devices that convert the kinetic energy of the wind into electrical energy through the use of rotating blades. When the wind blows, it causes the blades to spin, which in turn drives a generator to produce electricity. Wind turbines are commonly used to generate renewable energy from wind power.
