License Pour Xilisoft 3.1.43

Towers or solar chimneys are a technology that combines solar thermal technology, wind and geothermal to generate electricity clean based on a phenomenon as simple as convection (hot air weighs less and tends to rise). The plant consists of a circular area of \u200b\u200bland that is covered with a transparent material with a hollow central tower, the warm air rises up the chimney by moving turbines found inside. Some pipes buried in the ground serve as thermal storage ensuring functioning 24 hours a day (even without sun) and also the glass surface can be used as agricultural emissions as the temperature reached inside does not exceed 40 º C.
http://www.madrimasd.org/blogs/energiasalternativas/2008/05/16/91984

What I saw in this video is that there is a plastic version under which the grass grows http://youtu.be/XCGVTYtJEFk

Its construction was scheduled to begin in the 2007, and completed in 2010. However, in October 2009 has not started construction and it is clear that eventually built. - Oh! What should be the problem? - http://es.wikipedia.org/wiki/Torre_solar_de_Fuente_el_Fresno


In the eighties was in operation in Manzanares (Ciudad Real) a first 50 kW prototype in operation for more than 15,000 hours.

solar radiation through the transparent coating hitting the ground and being re-radiated back outwards but in this case with different wave lengths (in the range of infrared) are not able to cross again the transparent material and heat the air that is inside. This, by increasing its temperature, its density decreases so it tends to rise toward the fire being directed at reaching speeds between 50 and 70 km / h .
http://www.madrimasd.org/blogs/energiasalternativas/2008/05/16/91984