2012年12月23日星期日

Wind Power

Wind power is an energy source from wind which is harnessed using a system to transform the moving energy of the wind into: mechanical energy, electrical energy.


The wind blows on the blades and makes them turn. Then the blades turn the shaft, which is inside the nacelle (The nacelle is a box covering the gears and the generator at the top of the turbine.) The gears connected to the shaft are rotated and generate rotational energy. The generator uses magnetic fields to convert the rotational energy into electrical energy. The power output goes to a transformer, which converts the electricity coming out of the generator to the right voltage for distribution system. Finally, the national grid transmits the power around the country.

There are some disadvantages of wind power. All the people know the advantages of wind power; they are not sure about the disadvantage of it.
 
First, wind power is a variable resource, produce electricity only when the wind blows. Secondly, and it can direct fatalities from collisions or electrocutions and loss of wildlife habitat and natural vegetation. Then wind turbines have the potential of becoming interference to radio-transmitted wave signals and communication.
 
These are the disadvantage of wind power. All the things in the world have two sides, we should compare the advantage and disadvantage, then make a decision.

References:
Properties, P. (2010, August 27). We Run On Wind Power - Preservation Properties Real Estate. Newton and Surrounding Areas Massachusetts Real Estate - Preservation Properties Real Estate. Retrieved December 15, 2012, from http://www.preservationproperties.com/Blog/We-Run-On-Wind-Power

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