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With the use of turbines, mechanical
output in the form of rotational energy can be derived from the
moving air in the Tower. The turbines are particularly robust
and quiet in operation. Turbines in a Solar Tower do not work
with staggered velocity like a free-running wind energy converter;
instead they will use pressure-staged wind turbines, similar to a
hydroelectric power station, where static pressure is converted to
rotational energy using a cased turbine through the installation of
a pipe.
The energy yield from this type of
cased pressure-staged turbine is about eight times greater than that
of a speed-stepped open-air turbine of the same diameter. The output
achieved is proportional to the product of volume flow per unit and
the fall in pressure at the turbine. In order to achieve
maximum energy yield, a turbine regulation system is used to
maximize production under all operating conditions.
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