Sunday, February 14, 2010

Pros And Cons Of Solar Energy


Most power plants in the U. S. and all over world are using normal fuels to operate and generate electrical power. Fossil fuel has been used as a source of energy so long as man has learned to generate power. Fossil fuel has been about for ages and when man began to use this power sources nobody though about the effects. Carbon-based fuels will run out and there'll be a shortage of it in near future. This deficit in fossil fuel will have its affect on our daily live and numerous industries. Today we see a number of these has effects on already, fossil fuel prizes are raising and electricity is starting to become dearer. Though normal fuels are way more shocks, to want for carbon-based fuels will continue to be here and won't fall in near future. To resolve this lack of normal fuels we're going to need to have a look for other possibilities for our energy demand.

Fortunately, alternative sources of energy are growing in fees. For example, locations with high water falls are experimenting on building a hydro-electric power plant, which turns out to be successful. Other locations with high wind speed employ a power wind mills that will convert wind energy into electricity. Also thermal and tidal powers are good choices.

Solar energy is also one of the energy sources that is gaining in interest. Solar energy has steadily been growing. Today solar energy is widely used in the US and the advantages are numerous. Our solar energy source, the sun, its life span is estimated to be another 4.5 billion years. It is fair to say that this energy source is almost endless.

Rate of Energy from the Sun

The sun's radiation reaches a certain unit of area in space in the area of the Earth's orbit and is guestimated to be at 1,400 watts per square meter. Out of this, photovoltaic cells ( also known as solar cells ) can capture nineteen to fifty six watts per square meter ( for 15% potency ) or an equivalent of 0.45 to 1.35 kilo watt an hour ( kWh ) in a yearly night and day average.

Therefore, if there would be more area that'll be covered by several solar cells, these panels can produce a touch more energy in the shape of electricity than what's now available from oil, gas, and other power sources mixed ( presuming 8% solar cell potency ).

Conversion of solar power

There are 2 ways of conversion of solar power. First is the direct solar energy which involves only one conversion into a serviceable form. For example :

Sunlight hits the solar cell, changing it into electricity. Sunlight hits the absorber surface of a solar thermal collector, changing into thermal energy which can be employed to heat houses during cold season.

The second is the indirect solar energy which involves more than one conversion to reach a usable form. For instance:

Plants use photosynthesis to transform solar power to chemical energy, which can be burned later as fuel to generate electricity ( AKA bio-fuel technology ). Hydroelectric dams and turbines are indirectly supplied by solar power thru its interactions with the Earth's atmosphere.

Pros and Cons of solar power

Just like any other types of energy resources, solar energy has its ins and outs.

Pros :

Pollution-free. Solar facilities can be run with little additional input or upkeep. It is abounding. As discussed earlier, almost all of the inhabited areas here on Earth can be reached by daylight.

Cons:

Although it is abounding, non-tropical locations can receive small daylight. Therefore , power that'll be produced in these locations is a minimum. Only during daytime therefore unavailable during night time. Photovoltaic cell technologies generate direct current ( DC ) power which should be converted to AC ( AC ) power employed in distribution grids.

Once large development of the utilization of solar electricity is materialized, expect that each household or industry in the world will now be powered by solar electricity. It's not merely a dream, it's going to be a fantasy.

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