Wind+energy+-+Min+Yen

WIND ENERGY__ ** 1. does not generate pollution or radioactive wastes like other forms of electricity generators do. 2. Construction and installation has less environmental impact. 3. Used to provide electricity to individual homes, which means that no fuel and other materials are needed. When a natural disaster happens and destroys the power lines, the residents with the windmills will not have to lose the supply of electricity. 4. Also able to generate electricity for large amount of people ß  allows individuals to take advantage of some benefits without personally owing the equipment or having to pay maintenance fees. 5. Does not consume any non-renewable source, like coal, natural gas, or oil. 6. Wont contribute to the environmental harm as wind is a resource you can get everyday. 1. to be thought as an undesirable appearance 2. can be damaged in thunderstorm due to tall, thin structure. Based on National Light Safety the most damage to wind turbines is caused by lightning. 3. Blades of wind turbine can hit birds who attempt to fly between them. However, birds are also affected in other power generation methods, especially pollution. (Z Perry) -cost of electricity dropped from 25 cents/kWh in 1981 to 4-6 cents/kWh - even though the wind turbine prices have increased a bit since 2005, wind power is cost competitive with the new generation from coal and natural gas plants -increasing demand: global wind capacity grew from over 6,000 MW in 1996 to more than 59,000 MW by the end of 2005; significant growth in North Europe, Spain and India - end of 2005: U.S. wind power market reached more than 9,100 MW-providing enough power to serve the needs of 2.3 million homes; majority of this capacity is in California, Texas, Iowa, and Minnesota - U.S. rank = third in the long-time global leader in wind power development in this graph, you can see the gradual decrease in the wind price (cents/kWh) starting from 1980 o around 2000 and a further premonition of the decrease till year 2025. It could be also said that the price is getting cheaper as many countries have started to accept this idea to provide electricity and water pumps for their countries. Not only that, this is strongly supported as it is a renewable resource and will give no harm to the environment like those fossil fuels do when used. (Wind Power Monthly)
 * __Physics 11.4 presentations
 * __Advantages of wind energy:__ **
 * __Disadvantages:__ **
 * __Market for Wind Energy__ **

- transform kinetic energy of wind into mechanical or electrical which could be used for practical use - mechanical: normally used for pumping water in rural or remote areas - wind electric turbines: generate electricity for homes and businesses - two basic designs of wind electric turbines: vertical-axis, and horizontal-axis
 * __what is a wind turbine:__ **

the diagram below is a basic explanation of how the vertical and horizontal axis are both designed. the rotor blade is made up of reinforced polyester or wood-epoxy.





<span style="color: #333333; font-family: Calibri,helvetica,sans-serif;"> <span style="color: #333333; font-family: Calibri; font-size: 13.0pt; mso-bidi-font-family: Arial; mso-bidi-font-size: 14.0pt; mso-bidi-font-weight: bold;"> <span style="color: #333333; font-family: Calibri; font-size: 13.0pt; mso-bidi-font-family: Arial; mso-bidi-font-size: 14.0pt; mso-bidi-font-weight: bold;"> . N.d. retrieved 27th 09, 2009 from [] Wind Power Monthly, n.d. retrieved 27th 09, 2009 from []
 * __Citation:__ **