Wind Energy

Wind isn't just some uncontrollable part of nature that messes up our hair or sucks up Dorothy, Toto and anything else in its way. It can't be trained but it can be put to work. The kinetic energy of wind can be changed into other forms of energy. When a boat uses a sail to push it, that is one form of wind energy at work. Farmers have been using wind energy for years to pump water from wells and turn large stones to grind wheat or corn - just like a water wheel.

Wind is also used to make electricity. Blowing wind spins the blades on a wind turbine - just like when you blow on a toy pinwheel. When the blades turn, the turbine is operating and electricity is generated. The turbine has a brake, so if the wind blows too hard, the brake can stop the blades from being damaged. Some wind turbines are up to 10 stories high and have blades as long as 50 feet. Wind turbines don't create any pollution but they can be pretty noisy.

Wind has to blow at speeds of 12 to 14 miles per hour to turn the turbines fast enough to create electricity. The turbines usually produce about 50 to 300 kilowatts of electricity each. Kilo means 1,000, so a kilowatt is 1,000 watts. You can light ten 100 watt light bulbs with 1,000 watts. This means a 300 kilowatt wind turbine could light up 3,000 light bulbs that are 100 watts.

Wind turbines are grouped together in what are called wind farms. About 30 percent of the world's electricity is made from wind in California. They have three large wind farms that create enough electricity to supply a city the size of San Francisco with power. Two countries that use a lot of wind energy are Denmark and Germany.

The world's largest wind machine is on the island of Oahu, Hawaii. The windmill has two blades, 400 feet long, on the top of a tower which is 20 stories high.

Do you have any windy day stories? Comment below if you do!

Related Stories:

latest videos


Fave Electrical Gadget?

  • It's all about my GameBoy.
  • I couldn't live without my cell phone.
  • I like to keep minty fresh with my electric toothbrush.
  • I love my retro Easy Bake Oven.

related stories

Micro_a mic
Besides the fact that Nuclear Power plants can make a little fish grow a 3rd eyeball… what else d...
If you think eating carbohydrates will only make you pack on the pounds, then you're wrong. Carbs...
It's hard to imagine that water can be used to create electricity. The two are a dangerous combin...
Will we be forced to start writing with a pen and paper when the world's fossil fuel deposits ru...

Random in the forums

swirly-girly posted in Debating:
"NovaHex" wrote: "swirly-girly" wrote: "NovaHex" wrote: If you wanna go against the constitution, that's your thing dude. the constitution changes all the time maybe now it can change for something good The constitution NEVER changes, just that the "meaning" of certain phrases may be altered. One thing I dont quite understand is what you mean by "it can change for something good". Is allowing elderly people the right to vote bad? the constitutions been changin ever since t was the magna carta if it never changed we'd still have the magna carta or the BNA for a constitution. the constitution act of 1982 was a massive change. see what Alpha T said. if u dont know what ur doing u shouldnt be allowed to vote drive or own a gun.
reply 29 minutes
i'm afraid of dogs. 
reply 43 minutes
"iamalive" wrote:are you ok fine ty but I'm a lil worried about u
reply about 1 hour
Siamqa_Marisa posted in General:
im afraid of insects xD
reply about 1 hour
reply about 1 hour

play online games