Motori Stirling. Come funzionano. Vendita. Risorse varie

THE USE OF MIRRORS AND LENSES FOR MAKING POWER


As the Earth orbits the Sun, it receives approximately 1,400 W / m² of energy, as measured by the solar constant. Of the energy received, roughly 19% is absorbed by the atmosphere, while clouds on average reflect a further 35% of the total energy. The generally accepted standard is 1020 watts per square meter at sea level.








Parabolic Solar Collector at MIT
Posted by Sun March 16, 2009 at 07:10 AM in Solar concentrators

The folks @ MIT are warming up to the idea of parabolic solar collectors, recently demonstrating this 12-foot dish of massive heating power - the completed mirror focuses enough solar energy at its focal point to melt solid steel. The energy of typical sunlight is concentrated by a factor of 1,000. This was showcased during a demonstration, in which a team member held up a board, which instantly and violently combusted, when brought within range of the focal point.




New Solar Balloon Creates 400 Times More Energy Than The Average Solar Cell
Posted by Sun October 26, 2008 at 09:22 PM in New Inventions

There are many new forms of alternative energy but maybe none as interesting as the Cool Earth Solar “Balloon.” The concept behind this design is that they create an “inflatable plastic thin-film balloon (solar concentrator) that, upon inflation, focuses sunlight onto a photovoltaic cell held at its focal point.

The design produces 400 times the electricity that a solar cell would create without the company’s concentrator.” Cool Earth has already began construction on a power plant in Livermore, CA that will utilize this new technology. The plant is modest in size, creating only 1.4 Megawatts but if this plant works as well as they expect it to, they plan on launching a full sized plant next summer. One great thing about this device is that it’s made up of a very common and cheap material. “Plastic thin film is abundant and cheap,” said Cool Earth Solar CEO Rob Lamkin. “It only costs two dollars for the plastic material necessary for our solar concentrator.”

It’s ideas like this that I think will stick. It’s cost efficient. It’s made of an easy to find material and it’s an environmentally sound concept.

Edited by fabrizio3 - 5/4/2010, 11:58