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I built a small version of this and it increased air temp from 72 degrees to 137 degrees with only 32 cans. I'm going to built a larger version this fall using approx. 140 cans.

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There is no valid reason not to include stuff like this in new construction. Wish I'd been aware of it when I designed my house. There would several such panels to conserve energy.

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from TreeHugger

IBM solar collector magnifies sun by 2,000x (without cooking itself), costs 3x less than similar systems

Source: Original Post Date: March 2014 -  A team at IBM recently developed what they call a High Concentration Photo Voltaic Thermal (HCPVT) system that is capable of concentrating the power of suns, they are even claiming to be able to concentrate ener

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How To Build Your Own Solar Thermal Panel For Around $5 (Produces water hot enough to scald!)

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Conical Solar Panels . Even for photovoltaic (PV) panels, there’s such a thing as too much sun—when cells overheat, they become less efficient. V3Solar solved that problem with Spin Cell, a conical array that floats on magnets. An outer cone made of specialized lenses concentrates bands of sunlight on an inner cone covered with PV cells. The cells capture light energy but spin away before thermal energy can transfer.

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from Inhabitat

World's First Integrated Solar System Generates Electricity and Heat

integrated solar system, electricity and heat, Australian Renewable Energy Agency, solar PV, solar thermal

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from ArchDaily

Ferreteria O´Higgins / GH+A

Corporate building for Ferretería O´Higgins in Santiago by Guillermo Hevia Architects. Thin and perforated CORTEN steel fins protect the double envelope from solar insulation but leave clear views out.

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Google Image Result for http://www.greensolarcafe.com/wp-content/uploads/2008/09/pvthermalsystemdetail1.jpg

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DIY Solar thermal water heater..................... You tube. FAR better description than most. Very well done and good looking design. .................. Building a Water Heating Solar Panel.wmv - YouTube

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'Virtu' by Naked Energy (UK based). A cyllindrical tube with integrated PV cell in vacuum tube to generate both electricity and warm water.

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