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Sempra spins Sunrise Powerlink in the Union-Tribune

A Utah based company called IAUS (International Automated Systems Inc.) has developed a solar lens technology that transmits solar energy with an efficiency of 92%. A California energy consortium has invested in the first stage of the project. Twenty specially designed solar towers are being erected close to the Great Basin in Delta, Utah. Each tower holds four solar lenses that follow the sun as it crosses the clear blue desert sky. Each lens will focus the sun's rays onto specially designed heat exchangers that will convert the solar energy to super-heated steam. The heat exchangers double as high-efficiency turbines that will drive electrical generators to produce alternating current output. Later stages will involve placing 1000 towers over 700 acres of desert. With each tower having a capacity to produce 100 kW of power, the entire field stands to produce close to 100 MW of power when finished. That's enough energy to power 50,000 average Californian homes. Once generated, the power will travel around five miles to be integrated with the U.S. national power grid. The key to the success of the project are the unique thin-film solar lenses. Lenses of this size are typically heavy and expensive to produce. IAUS have developed a technique of embedding magnifying material into cheap, light, rolled plastic. The plastic is composited into extremely large Fresnel lenses. The lenses are light, relatively cheap to manufacture and easy to maintain. This compares favourably with traditional solar collectors. Although the sun does not always shine on the solar plant, the company believe that using a heat storage mechanism, they can deliver power around the clock at an estimated production cost of 5 to 10 cents per kilowatt hour. With such competitive production costs, IAUS say that their solar power plant will not only beat the price of coal, but be the first commercial solar power plant to compete favourably with gas powered stations.
— July 30, 2008 11:03 p.m.

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