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How does it work?

A heat transfer medium is pumped through the receiver and absorbs the highly concentrated radiation reflected by the heliostats.  The heated fluid is then sent through a heat exchanger, where the thermal energy is used to generate steam and power a turbine.  Eskom will use molten salt (a combination of Sodium Nitrate and Potassium Nitrate) as a heat transfer and storage medium in a two tank molten salt storage system.