What Is A Solar Tower-www.ggg258.com

Reference-and-Education A solar tower is a device that converts solar energy (heat from the sun) into electricity. Solar towers are suitable for large-scale power generation. The Basic .ponent Parts of a Solar Tower Energy Plant: * Solar Tower – The solar tower is simply a large structure with a boiler (a tank used to heat liquids) at the top. The boiler collects the heat from the sun. It is also referred to as the "central tower" or "power tower". * Heliostats – These are moveable mirrors that track the sun and reflect the sunlight at the top of the solar tower where the heat is collected. These mirrors move as the sun moves, so as to continuously reflect maximum sunlight toward the tower. * Heat Transfer Fluid – We use the term "heat transfer fluid" because not all solar towers use the same. Early solar towers used water to collect the heat from the sun. Some solar towers use liquid sodium. Whichever liquid is used, it is referred to as "heat transfer fluid." * Heat Storage – Because we still want to generate energy at night after the sun is gone, newer solar towers have methods of storing heat so that it can be used during the night to continue generating electricity. * Steam Generator – As stated earlier, liquid sodium is now used to collect the heat, and the liquid sodium is then used to generate steam. * Steam Turbine – This is a generator that uses steam to generate electrical power. This is the same set-up as is used in a conventional power plant. How Does a Solar Tower Work? .puter controlled mirrors called heliostats track the sun, adjusting their position as the sun moves, and reflect sunlight toward the top of the solar tower, where a heat collector tank is located. Of course, more than one heliostat is needed, so an arrangement of hundreds or even thousands of heliostats is used. The .bined reflected sunlight of these heliostats can produce temperatures as high as 550 degrees, Celsius at their focal point. Thus, the liquid inside the boiler is rapidly heated and is then pumped downward into storage tanks, or is pumped directly into to a heat exchanger where it is used to make steam. The steam produced by the heat exchanger is then led through a steam turbine, which uses the steam to generate electricity. As an interesting note, liquid sodium is used as a heat transfer/storage liquid, due to its ability to hold and store heat efficiently. Large storage tanks can be used to hold the heated liquid sodium. The stored "heat" can then be used at night, so as to continue generating steam which is used to generate electricity. Currently, there are two solar towers in operation using the above design. The 64 MW Nevada Solar One and 11 MW PS10 solar power tower in Spain. Solar tower energy is categorized as CSP (concentrated solar power) technology. 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