28 Mayıs 2012 Pazartesi

Photovoltaic (solar cell) Systems

Solar cells convert sunlight directly into electricity. Solar cells are often used to power calculators and watches. They are made of semiconducting materials similar to those used in computer chips. When sunlight is absorbed by these materials, the solar energy knocks electrons loose from their atoms, allowing the electrons to flow through the material to produce electricity. This process of converting light (photons) to electricity (voltage) is called the photovoltaic (PV) effect.

Thin film solar cells use layers of semiconductor materials only a few micrometers thick. Thin film technology has made it possible for solar cells to now double as rooftop shingles, roof tiles, building facades, or the glazing for skylights or atria. The solar cell version of items such as shingles offer the same protection and durability as ordinary asphalt shingles.


Solar Photovoltaic Resources
How it All Works: Solar Cell Animation
Find out about NREL research in photovoltaic technologies from DOE's National Center for Photovoltaics. Also see DOE's Photovoltaics Program.

Types of Solar Energy

Hi everybody, I want to write about types of solar energy. Because it's very important. Everybody must knows that. And I want write English. I hope you will like this article

Solar energy technologies use the sun's energy and light to provide heat, light, hot water, electricity, and even cooling, for homes, businesses, and industry.

There are a variety of technologies that have been developed to take advantage of solar energy. These include:

Photovoltaic Systems
Producing electricity directly from sunlight. [learn more]

Solar Hot Water
Heating water with solar energy. [learn more]

Solar Electricity
Using the sun's heat to produce electricity. [learn more]

Passive Solar Heating and Daylighting
Using solar energy to heat and light buildings. [learn more]

Solar Process Space Heating and Cooling
Industrial and commercial uses of the sun's heat. [learn more]


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