In a power tower system (also called a central receiver), a field of large two-axis, flat, tracking mirrors reflects the solar energy onto a receiver that is mounted on top of a centrally located tower, as shown in figure below;
Solar Tower
The solar energy is absorbed by a working fluid (typically molten salt or water) and then used to generate steam, which powers a conventional turbine. Even when the sun is not shining, some designs can effectively store thermal energy for hours
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