SUPERCRITICAL BOILER:
Supercritical steam generators (also known as Benson boilers) are frequently used for the
production of electric power. They operate at "supercritical
pressure". In contrast to a "subcritical boiler", a
supercritical steam generator operates at such a high pressure (over
3,200 psi/22.06 MPa or 220.6 bar) that actual boiling ceases to
occur, and the boiler has no water - steam separation. There is no generation
of steam bubbles within the water, because the pressure is above the
"critical pressure" at which steam bubbles can form. It passes below
the critical point as it does work in the high pressure turbine and enters the
generator's condenser. This is more efficient, resulting in slightly less fuel
use. The term "boiler" should not be used for a supercritical
pressure steam generator, as no "boiling" actually occurs in this
device.
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