Wind Power
Wind is a form of solar energy. Winds are caused by the uneven heating of the atmosphere by the sun, the irregularities of the earth's surface, and rotation of the earth. Wind flow patterns are modified by the earth's terrain, bodies of water, and vegetation. Humans use this wind flow, or motion energy, for many purposes: sailing, flying a kite, and even generating electricity.
The terms wind energy or wind power describe the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. This mechanical power can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical power into electricity.
Wind power makes a wonderful power source if you live in a good wind area. Wind can be used as back up power in the event of a power outage or if you have enough energy can power the entire house. It is an economical and excellent source of electricity if you live outside of the power grid and is environmentally friendly.
Typically, at an average annual wind speed of 12 MPH the a wind energy system will produce about 4800 kWh of energy per year. That will reduce an average family's bill by up to 40% per year (at an average annual use of 12,000 kWh/year). There are lots of full service windmill installation companies as well as do-it-yourself kits on the market.
There are a few site requirements that will determine if wind power is right for you.
You will need:
-At least a 10 MPH average annual wind speed (best results at 12 MPH or more)
-Property of at least 1/2 acre with few obstructions
-Ability to have a structure at least 42' tall on your property
(check with your HOA, city code restrictions, etc.)
So how do wind turbines make electricity? Simply stated, a wind turbine works the opposite of a fan. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity.
Most windmill systems work in tandem with your electric utility to power your house. When the wind isn't blowing, the utility supplies your electricity. But when its windy out, the windmill provides clean, quiet electricity. When it generates more electricity than you need, your meter can actually spin backwards which means you're essentially selling electricity back to the utility.