news.bbc.co.uk - Spain's Solar Tower : Makes Solar Energy do the work It always wanted to do - Make Power ( Electricity )

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Power station harnesses Sun's rays

By David Shukman Science correspondent, BBC News, Seville

A field of 600 mirrors reflects rays from the Sun A tour of the tower How the solar tower works

  " There is a scene in one of the Austin Powers films where Dr Evil unleashes a giant "tractor beam" of energy at Earth in order to extract a massive payment.

Well, the memory of it kept me chuckling as I toured the extraordinary scene of the new solar thermal power plant outside Seville in southern Spain.

From a distance, as we rounded a bend and first caught sight of it, I couldn't believe the strange structure ahead of me was actually real.

A concrete tower - 40 storeys high - stood bathed in intense white light, a totally bizarre image in the depths of the Andalusian countryside."

HOW THE SOLAR TOWER WORKS 1. The solar tower is 115m (377ft) tall and surrounded by 600 steel reflectors (heliostats). They track the sun and direct its rays to a heat exchanger (receiver) at the top of the tower 2. The receiver converts concentrated solar energy from the heliostats into steam 3. Steam is stored in tanks and used to drive turbines that will produce enough electricity for up to 6,000 homes

<http://news.bbc.co.uk/2/hi/science/nature/6616651.stm >
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