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Solar energy harnessing takes many forms. Wind is actually solar driven. Photovoltaic panels comprised of solar electric cells primarily made from silicon ingots sliced very thin as single crystal cells, fragmented composite polycrystalline cells or deposited amorphous silicon referred to also as thin film, produce electricity as sunlight disrupts electrons. Solar thermal systems concentrate the Sun's energy and heat up a transfer fluid such as light oil or liquefy a salt this heat is transferred to turn water into steam which thus spins a turbine to produce electricity. Big, a bit pricey and tough to fit on your roof but quite efficient at producing energy in a big way as well. Of course solar energy can be easily converted to heat energy using a variety of heat absorbing materials to convert ultraviolet light into infrared heat and then transfer that heat in a fluid such as water, antifreeze/water, and air, yes air is a fluid. Passive solar, such as windows greenhouses and skylights reduce daylighting needs and provide a more natural spectrum light source. With out night shading though they can allow significant heat energy loss due to night sky radiation, the name applied to the concept that a black body will absorb energy and the night sky acts like a black body, literally sucking the heat out of the living space into the depths of the universe if it doesn't hit some dust, pollution or space trash and warms it up a little on the way. If you think of heat as light you just can't see, it makes things much easier to grasp. So grasp your mouse and click the link of choice to boldly venture forth into the world of energymaker.com Power to the people! |
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