Method for heat rate improvement in partial-arc steam turbine

Details Method for heat rate improvement in partial-arc steam turbine Method for heat rate improvement in partial-arc steam turbine

F - Mech Eng,Light,Heat,Weapons

01

D

170/39

F01D 17/00 (2006.01) F01D 17/18 (2006.01) F01K 7/16 (2006.01)

Patent

CA 2013404

Method for improving the heat rate of a steam turbine operated in a partial-arc mode includes sequential closing of control valves to establish a first arc of admission followed by a reduction of steam pressure to a predetermined level. Additional valves are closed to bring the admission arc to an optimum value and power reduction is thereafter affected by pressure reduction. In a further method, low power operation is achieved by reducing the arc of admission below optimum when steam pressure has been reduced to a minimum value.

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