Solar Energy An Alternative Energy

Solar Energy: An Alternative Energy

Imagine a perfect source of energy. One with which no pollution what-so-ever is

associated with. No poisonous gasses or destruction of rain forests. This

abundant source of energy comes from the sun. Solar energy is the visible energy

produced in the sun as a result of a constant nuclear fusion reaction that is

taking place. The amount of energy at the solar constant, which is at outer edge

of the earth’s atmosphere, is two calories per minute per cm squared. A calorie

is the amount of energy needed to raise one gram of water one degree Celsius.

If we could efficiently harness the energy bombarding the earth for twenty-four

hours we could power New York for a year. Unfortunately the photovoltaic cells

that change the energy into electricity are so inefficient that it would take

twenty-five years to pay for it’s self in output.

There many uses of solar energy. Some homes rely fully on the power of the sun

to heat their water. Other houses have flat plate collectors which aid in the

heating of the house and water. Solar Energy plays a vital role in the

absorption cooling cycle in a process called solar cooling.

Since wind is caused by the up and down movement of hot and cold air, wind

energy can be a branch of solar energy. The same thing with tidal energy. And

since the sun plays a vital role in the water cycle hydroelectric energy can be

attributed to solar energy.

Solar Energy has great potential in becoming a main source of energy in the

future.

Bibliography

“Alternative Resources” Internet. Large URL

Schneider, Herman and Nina. Science for Today and Tomorrow. Boston: D.C.

Health and Company.

“Solar Energy.” Microsoft Encarta. 1995 ed.