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Wind can be an awesome force of nature, just ask anyone who has been in a tornado or powerful hurricane. We can harness this wind for the use of generating electricity for our world. When the sun shines it heats the earth, but since the earth is made of different materials and is of differing heights and valleys it heats unevenly, especially over land and water.

Daytime is when the air above the land heats up more quickly, and it heats the air over water more slowly. Warm air that is above the land expands and rises, and cooler air quickly comes in to fill the gaps, and this creates wind. In the evening, the winds reverse, because air cools more quickly over land than over water. This is why you have the differing temperatures of land near bodies of water.

Today as we look for new ways to power the earth, it is a natural thing to look at wind power. It has been used for many years to power simple machines of the past. Wind is another type of solar energy, which makes it a renewable energy source. In years past we used windmills, the wind machines of today are called turbines.

Much like the old fashioned windmills, the wind machines we use today use blades to collect the wind’s energy. Windmills work because they harness the power of the wind to generate electricity. Even the new wind machines must have wind to work, so when the wind isn’t blowing other types of power have to be used, like solar panel energy.

There are two types of turbines used today they are based on the direction of the rotating shaft for example; horizontal axis wind machines, and vertical axis wind machines. Sizes of wind machines can vary widely. There are smaller turbines used to power a home or small business, and they may have a capacity of less than 100 kilowatts. Larger commercial sized turbines may have a capacity of 5 million watts, or even as high as 5 megawatts. The large turbines are often found in wind farms that provide power to an electrical grid.

You will find that most turbines used today have a horizontal axis. They have blades that are made much like airplane propellers are. A horizontal turbine will typically stand about as tall as a 20 story building and will generally have three blades which can span as much as 200 feet.

One criticism of electric wind power is that the windmills necessary to generate power are massive and noisy. Their use is typically limited to remote areas of the countryside, where there is a greater expanse of open space and higher terrain. This makes their widespread use impractical for densely populated areas.

Is wind electricity the way for you to be electricity self sufficient? Some parts of the world have enough reliable wind to make enough electricity to serve everyones requirements.

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