Monday, January 17, 2011

advantages of solar power

Solar power is the conversion of sunlight into electricity, either directly using photovoltaics (PV), or indirectly using concentrated solar power (CSP). CSP systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. PV converts light into electric current using the photoelectric effect.
Solar power (also known as solar energy) is the technology of obtaining usable energy from the light of the sun. Solar energy has been used in many traditional technologies for centuries, and has come into widespread use where other power supplies are absent, such as in remote locations and in space.

Solar energy is more than just sunshine, it is also the energy of wind. It is the potential of solar energy application that holds hope for solving many of the world’s energy problems. It is a simple fact that daily sunshine provides enough energy to support all the power and energy needs of the planet. The trick is to get more energy more directly and efficiently from the sun.

Although 54% of all sunlight is lost before it reaches the earth’s surface, the sunlight that does reach the earth is about 200,000 times the total electrical energy generated everyday. This is only the visible component of sunlight, which is less than 50% of the energy of sunshine. This also doesn’t include wind energy, which is the direct result of some of that “wasted” solar energy.

The advantages of solar power as a means of creating energy are obvious: it's pollution free, renewable, and abundant. It could be argued that the disadvantages are just as clear, current technology is inefficient, underdeveloped, and in most cases too expensive to be cost effective.
Solar cells are totally silent. They can extract energy from the sun without making a peep. Now imagine the noise that the giant machines used to drill for and pump oil make!
• Solar energy is non-polluting. Of all advantages of solar energy over that of oil, this is, perhaps, the most important. The burning of oil releases carbon dioxide and other greenhouse gases and carcinogens into the air.
• Solar cells require very little maintenance (they have no moving parts that will need to be fixed), and they last a long time.
• Although solar panels or solar lights, etc., may be expensive to buy at the onset, you can save money in the long run. After all, you do not have to pay for energy from the sun. On the other hand, all of us are aware of the rising cost of oil.
• Solar powered lights and other solar powered products are also very easy to install. You do not even need to worry about wires.

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