Monday, 10 February 2014

Energy from our Sun

Energy from our Sun = Renewable Energy
Renewable energy reduces our emissions
Emissions that cause Climate Change
Emissions that endanger our children
solar cells and solar water heating panels combined on a roof - the energy of the sun called solar energy will help us not to destroy Earth as we know it
The use of Solar energy can be
quite nice to look at.
You can see here Solar electric cells +
Solar hot water heating panels.
conservation education online: solar energy or photo voltaic  or solar panels at Bear Springs Blossom Nature Conservation reduce our electricity bill, reduce air pollution and water contamination and help to lower the impact of global warming and climate change
B+S+B photovoltaic + wind turbine
Light to electricity = photovoltaic

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.

The name derives from the Greek word 'phot' what means light and from
the unit for electrical current volt which was named after the Italian Alessandro Volta.
Light to electricity = photovoltaic
solar panels photo voltaic s on a roof that faces South producing direct current electricity to store in batteries or to send to your electricity service provider
Photovoltaics on a roof

Sunlight is Earth's primary source of energy. The solar constant is the amount of power that the Sun deposits per unit area that is directly exposed to sunlight.
The solar constant is ~1,370 watts per square meter or ~1273 watts per 10 square feet
solar energy has many different possibilities to use - electricity with photo-voltaic, hot water with solar water heating panels, hot air with solar powered air boxes
How does photovoltaic work?
The direct conversion of light into electricity at the atomic level is called photovoltaics. The photoelectric effect can cause some materials to absorb photons of light and release electrons = electricity.
In 1839, the French physicist, Edmund Bequerel, was the first, who worked with materials that produced small amounts of electric current when exposed to light.
In 1905, Albert Einstein described the nature of light, the photoelectric effect . Einstein won a Nobel prize in physics.
In 1954, Bell Laboratories have built the first photovoltaic module. It was billed as a solar battery but too expensive to find a market.

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