US DEPT. OF ENERGY / SCIENCE PHOTO LIBRARY US DEPT. OF ENERGY / SCIENCE PHOTO LIBRARY
An engineer looks up at one of the mirrors, or heliostats, of the CRTF (Central Receiver Test Facility) experimental solar power station at Albuquerque, New Mexico, USA. The CRTF has a field of 222 heliostat arrays, each consisting of 25 1.2-metre square mirror facets. The heliostats concentrate the Sun's rays on boilers mounted on the 61-metre high tower that can be seen in the background. Water circulated through the boilers is converted to steam by the high-intensity solar radiation, & the steam is used to drive a turbo- generator to produce electricity.
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