WIND ENERGY AND HOW IT HAS BEEN DISCOVERED
Wind energy is the energy contained in wind power that beats
the earth’s surface. Exploited, it can be transformed into mechanical energy for pumping water, for example, or grinding corn on what works with wind mills. By connecting a rotor to an electric generator, modern wind turbines convert wind energy, which spins the rotor into electrical energy.
Egyptians may have been the first to use wind energy generated when they sailed upstream on the Nile, around the fourth century BC Over centuries sailing vessels were to dominate the seas and oceans, serving mainly commercial transportation, and military and scientific purposes. The great empires of our era sailing ships used to control and dominate large. These sailing vessels are present in the water today, but are built with modern equipment. Their use is, but very different – whether sports vessels, either as recreational boats.
Wind energy on land was exploited since the first windmill was built in ancient Persia in the seventh century. Since then the windmills are used for grinding corn, pumping water, sawing wood or provide other forms of mechanical energy. But large-scale operation barely appeared in the twentieth century, with the advent of “windmills” Modern – wind turbines that can generate an energy of 250 to 300 kw.
Because wind is an endless source of clean energy, wind turbines are installed in developed countries where the intensity of wind allows wind power can be exploited to supplement traditional power sources such as heat released by burning coal.
Improvements to the rotors and propellers, combined with an increase in the number of installed turbines, led to an increase in wind power by about 150% in 1990. In 1997, for example, manipulate the world market of wind energy around 3 billion dollars.
• Other uses
Finding a power source to charge your cell phone could be a problem when you’re on a trip to the mountains or simply forgot to take your charger with you. But the solution to this problem may be simpler than it would. Gizmodo says that students from Indian Institute of Technology have come up with a great idea. They have created a portable turbine, fueled by wind, which can be attached to mobile phone charging.
The technique is not yet on the market, but the department has sent a proposal of the Minister of Science and Technology in India to manufacture this type of turbine at a larger scale, said Prof. Lalit Kumar Das, head of the Department of Industrial Design. This device is intended to those who are on the coastal areas where wind is always present. But it can be used everywhere, even during a journey, as long as there is air movement. This mechanism could be an ideal solution for those who do not have at hand a source of electricity.
And if you wonder who will buy a cell phone unless it has the power, and might remain puzzled. For example, the population of CIOs, Bistrita Nasaud, Romania, buy mobile phones, even if only electricity is a concept that he dreams will come a day in their village. Signal network in the area is good, but if they want to charge a phone, it means a road for 8 km to the nearest town. And this is not an isolated case. According to Roy Stear, from Freeplay Energy, a company which produces and sells wind energy based generators, “Kenya has 30 millions of people and 3 million mobile phone users but only 200,000 homes electrical energy benefits.”
• Wind Energy Security
Wind energy is a promising source of electric power in the future due to its ecology and infinity. However, because wind speed varies during the day, season or years is a wind energy generated by intermittent resource. In areas of the globe with strong action of the wind turbine operates in around 60% during the year. Even so, because wind turbines may be insufficient to operate at full capacity. However technology has managed to adapt by improving their designs and producing and using other such energy.