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Sun powered Stirling-Dish system
Cleanergy AB
Åmål, June 2009 www.cleanergyindustries.com
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Stirling -Dish Systems are small power generation sets which generateelectricity by using direct solar radiation. The capacity of a single unit is 9 kW el. This size and the modularity of the single units qualify the Dish-Stirling system for very flexible applications. They areideal for standalone or other decentralized applications. In clusters with a capacity of up to 5 MW.
Dish-Stirling Systems transfer concentrated solar radiation with high efficiencies intoelectrical energy. Essentially the system consists of the following components: • Parabolic solar concentrator • Tracking system • Solar heat exchanger (Receiver) • Stirling engine with generator Theparabolic concentrator reflects the incoming solar radiation onto a cavity receiver which is located at the concentrator’s focal point. The solar radiation is absorbed by the heat exchanger (receiver) andthus heats the working gas (helium) of the Stirling engine to temperatures of about 650oC. This heat is converted into mechanical energy by the Stirling engine. An electrical generator, directlyconnected to the crankshaft of the engine, converts the mechanical energy into electricity (AC). To constantly keep the reflected radiation at the focal point during the day, a sun-tracking system rotatesthe solar concentrator continuously about two axes to follow the daily path of the sun. The electrical output of the system is proportional to the size of the reflector, its optical losses and theefficiencies of the Stirling engine and the generator.
Cleanergy AB
Åmål, June 2009 www.cleanergyindustries.com
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The Stirling Engine
The Stirling cycle is the most efficientthermodynamic cycle to transform heat into mechanical or electrical energy. As far back as in 1816 the Stirling engine was invented by the Scottish Rev. Robert Stirling. In the 19th century thousands of…
