A world record in terms of energy efficiency. And ‘that achieved with a parabolic mirror that, combined with the engine invented in 1816 by Scottish clergyman Robert Stirling, enter into the electricity grid 32% of the solar energy received, about twice that of standard photovoltaic panels. To achieve it is a Swedish company that installed in the Kalahari Desert in Africa, a photovoltaic concentrator consists of two large satellite dishes with a diameter of 12 meters, covered with mirrors, which reflect the sun’s rays making them converge in one place and going to feed a hot air engine of Stirling. Designed in the early 1800′s as an alternative to steam engines, the external combustion engine operates in a closed cycle using a gas such as thermodynamic fluid. Its commercial development has occurred for the first time in 1988, by a manufacturer of submarines for the Swedish Defense. The system converts 32% of solar energy into electricity which corresponds to more than double that produced by solar panels which is 15%. According to data from a test conducted in the United Kingdom, a single dish can generate between 75 to 85 megawatt-hours per year, enough to the needs of 24 families. (Web Photo)
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