In the first 2 designs the temperatures in the fluid or at
the collector tower, in contrast to temperatures in solar water heaters, are adequate to produce steam; the third design does not use steam at all, but is powered by a Stirling engine, a closed cycle heat engine capable of very high efficiencies.
The largest solar power system in the world (350 MW) is located in California's Mojave Desert and uses parabolic troughs to convert sunlight to electricity with an efficiency of about 20%. Using the second design, Spain is building a 15 MW solar power tower in Andalusia, and an even larger such system is planned in South Africa. And using the third design, which will have total conversion efficiency as high as 30%, Sandia National Laboratories & Stirling Energy Systems are building a prototype of a system which will generate electricity at the same cost as the conventional technologies.
the collector tower, in contrast to temperatures in solar water heaters, are adequate to produce steam; the third design does not use steam at all, but is powered by a Stirling engine, a closed cycle heat engine capable of very high efficiencies.The largest solar power system in the world (350 MW) is located in California's Mojave Desert and uses parabolic troughs to convert sunlight to electricity with an efficiency of about 20%. Using the second design, Spain is building a 15 MW solar power tower in Andalusia, and an even larger such system is planned in South Africa. And using the third design, which will have total conversion efficiency as high as 30%, Sandia National Laboratories & Stirling Energy Systems are building a prototype of a system which will generate electricity at the same cost as the conventional technologies.
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