Wind power used by wind turbines

design wind turbine propeller blades software heliciel

Understand and master the Wind power used by wind turbines:

The wind power is the energy of the wind, but from where does the wind comes?

Wind power uses the movement of air masses around the world, and local geographical thermal effects to drive generators or different machines.This air movement is the product of temperature differences.The difference in temperature changes the density of the air.The lighter warm air tends to go up when it meets cold air. The heat source causing the rising air, is the earth crust, heated by solar radiation, but also by the phenomena present at the center of the earth.
Solar radiation is the result of nuclear reactions and heat from the earth magma is also the result of nuclear reaction ... The wind turbine energy is therefore a nuclear source of energy! (Who has the immense advantage, to manage his garbage, and run long enough to be evaluated with enough distance to not generate too many surprises.) The energy problem is complex, and the perfect solution that everyone will agree, is to discover..

Meanwhile the wind turbine energy is a path we need to master to increase our energy independence.

series of interactive maps winds around the world integrated with the software héliciel

Wind energy converted into electricity:

We have seen in the history of the propeller that domestication of wind energy has emerged since a long time ... But now the energy took a universal form, electricity,Universal, but not perfect . Electrical energy is the most practical in many angles but has defects:

The production of electricity, with mechanical generators such as alternators, causes us to lose some of the energy captured. Efficiency of transformation mechanical energy / electrical energy are 0.8 to 0.9 maximum. We lose 1/10 of the energy captured.
Re transformed into mechanical energy, has an efficiency between 0.7 and 0.9, if it is properly used. In industry, bad motor sizing, poor lubrication or belt tension, lack of drive speeds on startup cause significant losses....And make the investment departure economies become energy abyss..

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transport of electricity causes line losses :(0.9)

storage of electricity is expensive and poorly controlled, batteries efficiency are around 0.7_0.8

transformers also create a performance loss :0.85 à 0.98

if you need the rectifier output :0.9 à 0.98

a possible gear unit in the chain of transformation efficiency: 0.7 à 0.98

The performance of the wind turbine propeller which can vary from 0.2 a 0.85 of the betz limit in the best case..

So much remains to be done, inventors who win a few tenths of a point of efficiency on any part of the chain, can save a fortune on energy for factories, individuals and states. The energy sector, retains creation potential with infinite wealth! At all levels, whether it's new range of low friction bearing, PC fan or air conditioning fan , Products with the best efficiency are now selected on priorit.

Amount of wind turbine energy:

Build a wind turbine for the sake of capturing wind energy is poetic but this is rarely the final goal of the manufacturer. The investment must be profitable, through energy production, whose value should be greater than the investment.

What are the factors of the power of the wind turbine and thus the wind turbine energy produced?

The speed and power of the wind.The power of the wind turbine is proportional to the cube of the wind speed. For a given site, it is an element that we can not control, it is set by the environment. The density of air with altitude plays a role to consider.The wind is not a steady flow of energy, and the speed variation in time, implies that the average power, which will be issued by the wind turbine, can not be calculated in a simple way.Page: reference speed and wind power deepens the concept.
The power of the wind turbine is proportional to the captured area. Wind energy is a transformation of the kinetic energy of the wind:

P= 0.5 X Density X S X (speed)³

The size of the propeller is determined by the investment.

Recoverable power: We can capture only 60% of the wind energy! A constraint is inseparable from prélevement kinetic energy, caused by a propeller immersed in a stream of free fluid:
- Take energy velocity implies that it slows the air mass. If we take all the energy velocity of the air mass, the air mass will be stopped. To leave a new air mass passing through the propeller, it will push the one stopped. This will consume energy... This phenomenon was quantified and calculated by the study of the change of momentum,more precisely formulated by the theory froude and Betz limit.
Efficiency of energy conversion systems: Yields of all links in the chain of transformation of wind turbine energy must be treated, but the performance of our propeller wind turbine rotor can move we have seen above 0.2 to 0.85.of the Betz limit. So we see that the aerodynamic quality of wind turbine blades is to take seriously , because it is a power factor depends only on our expertise, and our knowledge of the technique of propeller wind turbine.

Summary:

The amount of wind power will finally be 60% of the site's energy
The transformation of this energy we leave 30-50% of the energy
In final we get between 14 and 36% of the energy

concluded:

<<< between 14 and 36% of the energy >>>> The capture efficiency of wind energy is abysmal, pitiful, pathetic, poor .... A little quiet, it is relative: the wind energy is free! After having repaid the investment and paid maintenance, it's all good and it's clean. Nuisances , they are not to neglect Local noise, aesthetics, disturbance of birds) are more easily managed as radioactive waste, CO2 emisions or flood valleys. Then build the wind turbines, build your energy and be of those who have this enigmatic smile when they feel the wind rises. Make use of wind energy!

bibliographic references.