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What everybody should know about wind energy

By Edited Nov 13, 2013 0 0

  What is wind energy? It is using the power of the wind to generate other forms of power that we can use for our benefit. Wind energy is a renewable resource that has great potential to lower our dependency on fossil fuels by providing an alternative way to produce electricity. Wind turbine generators are generators that produce electricity when the wind blows.

  Even though wind energy use has doubled in the last several years, it still provides less than two percent of the United States total electricity needs. Some forecasts predict that wind turbine generators will be producing 20% of the United States electricity in the years to come.

  Wind power is becoming more popular as the demand for clean and renewable sources of energy increase and the cost of producing wind turbine generators decrease making it one of the fastest growing markets in the world. Some hobbyists are even building their own wind turbine generators because they are so cheap and easy to build.

Wind turbine house

  Wind is a form of solar energy that is caused by the uneven heating of the surface of the earth. As the sun heats up the earth, the heat is absorbed at different rates on the surface because of the terrain and composition of the earth. This creates an imbalance causing high and low pressure areas to develop in the atmosphere. As the air flows from the high pressure areas to the low pressure areas wind is produced. The result is basically an inexhaustible source of free power that does not pollute the environment or emit green house gases.

  One of the disadvantages of wind power is that it isn’t a constant source of power. This is because the wind doesn’t always blow, and at other times it might be blowing to much producing excess electricity. It does however blow enough to easily supply 20% of the world’s demand of electricity. Batteries can be used to store excess amounts of power that is generated on really windy days which can be used when there is greater demand for electricity.

    In the United States of America wind energy is rated using wind-power density classes. Class one is the weakest while class seven is the strongest. Wind power density reveals how much energy can be potentially converted into electricity at a site.

 

  Wind power                        33 foot                                              164 foot

        class                density            speed MPH                density                   speed MPH

             1                0 to 100              0 to 9.8                   0 to 200                       0 to 12.5

             2            100 to 150           9.8 to 11.5             200 to 300                  12.5 to 14.3

             3            150 to 200         11.5 to 12.5             300 to 400                  14.3 to 15.7

             4            200 to 250         12.5 to 13.4             400 to 500                  15.7 to 16.8

             5            250 to 300         13.4 to 14.3             500 to 600                  16.8 to 17.9

             6            300 to 400         14.3 to 15.7             600 to 800                  17.9 to 19.7

             7            400 to 1000       15.7 to 21.1             800 to 2000                19.7 to 26.6

Average wind speeds

  Because wind speed is never constant, the energy production of wind turbine generators is never as high as its ratings suggest. The ratings refer to the maximum amount of electricity that can be produced under optimal conditions. On average you can expect the generators to produce around 20% to 40% of the power that they are advertised to produce.

 Because the actual output of wind turbine generators is generally small, they are often chained together to form wind farms. Wind farms can generate lots of power that can power large urban areas, but they also take up lots of space that might not be available in these heavily populated areas, or the wind-power density for the area could be to small to power the generators.

wind farm

  Wind energy is not a new science; it has been used for thousands of years to grind grain and pumping water with windmills, and to propel sailboats and ships across the ocean. It is proving itself to be just a useful in today's world as it was back then.

  What is wind energy? It is using the power of the wind to generate other forms of power that we can use for our benefit. Wind energy is a renewable resource that has great potential to lower our dependency on fossil fuels by providing an alternative way to produce electricity. Wind turbine generators are generators that produce electricity when the wind blows.

  Even though wind energy use has doubled in the last several years, it still provides less than two percent of the United States total electricity needs. Some forecasts predict that wind turbine generators will be producing 20% of the United States electricity in the years to come.

  Wind power is becoming more popular as the demand for clean and renewable sources of energy increase and the cost of producing wind turbine generators decrease making it one of the fastest growing markets in the world. Some hobbyists are even building their own wind turbine generators because they are so cheap and easy to build.

Wind turbine house

  Wind is a form of solar energy that is caused by the uneven heating of the surface of the earth. As the sun heats up the earth, the heat is absorbed at different rates on the surface because of the terrain and composition of the earth. This creates an imbalance causing high and low pressure areas to develop in the atmosphere. As the air flows from the high pressure areas to the low pressure areas wind is produced. The result is basically an inexhaustible source of free power that does not pollute the environment or emit green house gases.

  One of the disadvantages of wind power is that it isn’t a constant source of power. This is because the wind doesn’t always blow, and at other times it might be blowing to much producing excess electricity. It does however blow enough to easily supply 20% of the world’s demand of electricity. Batteries can be used to store excess amounts of power that is generated on really windy days which can be used when there is greater demand for electricity.

    In the United States of America wind energy is rated using wind-power density classes. Class one is the weakest while class seven is the strongest. Wind power density reveals how much energy can be potentially converted into electricity at a site.

 

  Wind power                        33 foot                                              164 foot

        class                density            speed MPH                density                   speed MPH

             1                0 to 100              0 to 9.8                   0 to 200                       0 to 12.5

             2            100 to 150           9.8 to 11.5             200 to 300                  12.5 to 14.3

             3            150 to 200         11.5 to 12.5             300 to 400                  14.3 to 15.7

             4            200 to 250         12.5 to 13.4             400 to 500                  15.7 to 16.8

             5            250 to 300         13.4 to 14.3             500 to 600                  16.8 to 17.9

             6            300 to 400         14.3 to 15.7             600 to 800                  17.9 to 19.7

             7            400 to 1000       15.7 to 21.1             800 to 2000                19.7 to 26.6

Average wind speeds

  Because wind speed is never constant, the energy production of wind turbine generators is never as high as its ratings suggest. The ratings refer to the maximum amount of electricity that can be produced under optimal conditions. On average you can expect the generators to produce around 20% to 40% of the power that they are advertised to produce.

 Because the actual output of wind turbine generators is generally small, they are often chained together to form wind farms. Wind farms can generate lots of power that can power large urban areas, but they also take up lots of space that might not be available in these heavily populated areas, or the wind-power density for the area could be to small to power the generators.

wind farm

  Wind energy is not a new science; it has been used for thousands of years to grind grain and pumping water with windmills, and to propel sailboats and ships across the ocean. It is proving itself to be just a useful in today's world as it was back then.

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