Power plants – Motive fluid energized by externally applied heat – Having condition responsive control
Patent
1989-03-30
1989-12-26
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Having condition responsive control
60652, F01K 1302
Patent
active
048889547
ABSTRACT:
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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G. W. Bouton et al.; "Ten Years Experience with Large Pulverized Coal-Fired Boilers for Utility Service"; Apr. 26-28, 1982; pp. 19-21.
L. G. Crispin et al.; "Jacksonville Electric Authority's Conversion of a Subcritical Once-Through Unit to Variable Pressure Cycling Duty"; Proceedings of the American Power Conference; pp. 1-7, (No Date).
Ostrager Allen M.
Westinghouse Electric Corp.
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