Wind is nothing but air in motion which is caused by the heating of the earth’s surface by the sun. However, as the earth’s surface consist of plain land, hills, oceans, etc that do not lie in the same level, the absorption of the heat varies a lot. Also, during the daytime, the air above the earth’s landmass heats up quicker than the same over the oceans, causing it to expand and rise. As a result, cooler and heavier air rushes in to fill the vacuum, while the sundry levels of earth generates dissimilar air currents.
since the ancient times had been using wind for sailing
ships in the high seas. The winds of the famous Roaring Forties
and 50? S) had played a
significant role in the Clipper route
However, wind as a renewable form of energy has again hit the headlines in the light of crisis in fossil fuels and soaring Greenhouse gases. Calamity in the availability of petroleum products, caused by feuds among the middle-eastern oil producing countries have further deteriorated the picture. Wind energy is, therefore, back again as a source of producing electricity that may be called a renewable energy source for the simple reason that wind will blow as long as the earth’s surface gets the sunrays.
the cue from earliest American settlers who used
windmills to grind corn, cut wood at sawmills or pump
water, engineers now build modern types of windmills
that do not resemble their earliest versions one bit,
but are equally if not far more efficient in running
generators to produce electricity. Why, even in the
early eighties California had taken the lead in
producing electricity through wind-based equipment and
still utilizes more than twice as much wind energy as
compared to the other US states. The first offshore
Though there are basically two types windmills or wind machines (turbines) produced in the United States, namely, Horizontal-axis machines and Vertical-axis machines, most of the equipment now used are the Horizontal-type units. These machines have blades like airplane propellers and stand as tall as a 20-storey structure having three blades that spans 200’ across. Unbelievable but true, the largest wind machine in the world have blades larger than a football field to capture maximum wind energy.
Wind farms or wind power plants, as they are often called, consist of several wind machines that are clustered together to produce mass scale electricity, while the world’s largest Wind Farm that is known as Horse Hollow Wind Energy Center in Texas comprise 421 wind turbines that generate electricity to serve more than 220,000 homes every year. However, such plants are mostly owned and operated by individuals who produce and sell electricity unlike public utility companies and are known as Independent Power Producers.
efficiency of wind turbines depend a lot on the sped of
wind which varies from place to place as also from
season to season. Fortunately for the
Next to solar power electricity, wind energy electricity is the most eco-friendly form electric current that is available from the nature. It is a clean fuel and a green fuel available free of cost all through the year although some amount of maintenance is necessary to keep the rotating shafts ship shape all the while. In the case of solar power, even this is not required as there are no moving parts at all in a solar panel to keep it going.