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A design of Energy Innovation's concentrator shows how light reflects from mirrors close to the ground and shines on a silicon solar cell above, which is cooled by fans. The design concentrates the light 25 times, cutting down on the amount of expensive silicon needed. The mirrors move to follow the sun.
PARC solar concentrators
Using its research in optics and manufacturing, Xerox's Palo Alto Research Center is partnering with SolFocus to build glass solar concentrators that rotate during the day to face the sun directly. Over the next two years, about 2 megawatts of power generation from this project are slated to be installed and tested.
Stirling Engine Systems is building large dishes that concentrate the sun's rays to drive a mechanical engine. The company is under contract to build an array of dishes capable of generating 500 megawatts of electricity.