Power plants – Motive fluid energized by externally applied heat – Having condition responsive control
Patent
1979-02-15
1981-06-09
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Having condition responsive control
60664, 60644, F01K 1302
Patent
active
042716730
ABSTRACT:
A system for regulating the rate of closing of the turbine intake valve of a steam turbine plant is disclosed. A steam turbine is supplied from a steam generator through a turbine intake valve. A branch line conducts the steam to a bypass valve which is normally closed. In the event of conditions making it necessary to close the turbine intake valve rapidly, a regulator is provided to control the rate of closing of the turbine intake valve and the opening of the bypass valve so that the pressure conditions in the steam generator do not exceed the limits established by the manufacturer. Pressure measuring instruments are placed in the system to sense the pressure immediately upstream from the turbine intake valve and the bypass valve as well as the initial steam supply pressure. These pressure signals are transmitted to a computer which produces a control signal in accordance with predetermined conditions.
REFERENCES:
patent: 3934419 (1976-01-01), Aanstad
BBC Brown Boveri & Company Limited
Ostrager Allen M.
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