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Free Essay on Solar Energy

Free example essay on Solar Energy:

The sun is 93 million miles away, its warmth and light supports all life on earth, but if it were any closer it would extinguish life. The Suns center is terribly hot, over 9 million o F ! The Surface however is not as hot, it reaches up to 5800 o F. Although temperatures can reach the extreme here on earth we only receive one two billionth of the total energy generated by the sun, which is very fortunate. The sun is an average sized star and is about 4.5 billion years old. It’s made up of many elements including helium, hydrogen, Iron and magnesium.

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The sun is constantly burning hydrogen and it will continue to for another 5 billon years. After that it will begin burning helium which will cause it to expand 100 times its size. After this stage it will then collapse into a smaller star called a white dwarf.

Solar energy can be used in many different ways. It can be harnessed to heat water to the boiling point or to heat air. It also can be used to create electricity. This is done by using Photovoltaic panels, or PV panels for short. The panels contain an element called silicon, when exposed to the sun it becomes electrically charged. The energy is then brought to the charge controller, which guides the energy to the battery. The battery stores 12 volts. The last component is called an inverter. It converts the DC voltage into normal AC voltage. A 20 x 44-in. solar panel with 17.1 volts and 3.1 amps can produce 60 watts per hour. A sunny day has about 6 hours of peak sunlight.

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