Genesis Morocco: Stirling Solar Dish How do they function ?


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Genesis Morocco

Project Genesis is a strategic sustainable development framework for Morocco to translate from being a net importer of energy and a country facing water shortage issues, into the number one producer both of clean renewable energy and water in the region.

Saturday, June 10, 2006    <<Home

Stirling Solar Dish How do they function ?



Stirling engines are powered by the expansion of a gas when heated, followed by the compression of the gas when cooled. The Stirling engine contains a fixed amount of gas which is transferred back and forth between a "cold" and and a "hot" end. The "displacer piston" moves the gas between the two ends and the "power piston " changes the internal volume as the gas expands and contracts.


Stirling engines are unique heat engines because their theoretical efficiency is nearly equal to their theoretical maximum efficiency, known as the Carnot Cycle efficiency.




The gasses used inside a Stirling engine never leave the engine. There are no exhaust valves that vent high-pressure gasses, as in a gasoline or diesel engine, and there are no explosions taking place. Because of this, Stirling engines are very quiet. The Stirling cycle uses an external heat source, in this case solar energy. No combustion takes place inside the cylinders of the engine.


The solar dish will use arrays of sun-concentrating mirrors to track the sphere as it moves through the sky. Each tracking mirror will focus its concentrated light beam on a small Stirling engine, where heated hydrogen will expand and drive pistons and, through crankshafts, turn generators. Precision motion components will keep the mirrors tightly focused on the sun.