Sources of Energy
At the present time, nuclear and coal energy play an important role in the energy world. But this energy comes from non renewable sources. By using only these types of energies, their sources would be entirely depleted. That is why we are trying today to increase share of ecological renewable types of energy, such as the hydro energy, biomass energy, wind energy, tidal energy and the solar energy, I will write a details about. The Sun's rays have long been used as the heat source for evaporating and distilling water. Solar evaporation has always been an important salt-production process. Salt water is pumped into shallow ponds that are open to the Sun. As the water evaporates, its salts form crystals that settle at the bottom and are eventually collected. Producing drinkable water from brine is accomplished in a solar still, where salty water is evaporated. The salt becomes concentrated in the bottom of the still basin, while the water vapor rises, condenses on the still cover as fresh water, and is drawn off. The solar cooking stove has become an important device in tropical countries where firewood is in short supply. The stove may be simply a hot box, an insulated container, perhaps with a mirrored cover that intensi
The utilization of the force of ocean tides to generate electricity is yet another form of solar energy (see tidal energy). By installing turbines that are powered by the inflow and outflow of tidal waters - this force can be made to produce large amounts of usable energy, at no environmental cost. In order to produce high temperatures, sunlight must be focused or concentrated via an optical focusing system. In one such system a parabolic "dish" focuses solar radiation onto an absorber, concentrating sunlight by a factor of over 100 to produce temperatures exceeding 538 degrees C. If such high temperatures are not needed, smaller degrees of concentration can be obtained. Although not widely used, solar industrial-process heat systems have been effective in the food processing and other industries with moderate temperature needs. Single solar cells today power pocket calculators. Small arrays keep batteries charged, and they power irrigation pumps and refrigerators in areas where there is no commercial electricity. The energy applications discussed above all make direct use of solar energy as it strikes the Earth. There are also important indirect applications, where solar radiat
Some common words found in the essay are:
, solar energy, solar radiation, solar heat, power plants, energy tidal energy, solar power plants, solar power, 12-15 percent, solar cells, energy tidal, produce temperatures, usable energy,
Approximate Word count = 805
Approximate Pages = 3 (250 words per page double spaced)
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