Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Patent
1983-12-21
1985-11-26
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
60657, 60660, 91429, F01K 1300
Patent
active
045547882
ABSTRACT:
Hydraulically operated turbine steam admission valves wherein each valve has its own microcomputer control. In the event the valve gets stuck due to possible contamination in the hydraulic system, the microcomputer control provides an oscillatory control signal to dither the valve. If the valve remains stuck after dithering action it is provided with a control signal of an initial magnitude greater than that normally required to close the valve.
REFERENCES:
patent: 3462115 (1969-08-01), Barker
patent: 3836822 (1974-09-01), Schonfeld
patent: 4059960 (1977-11-01), Osborne
patent: 4262784 (1981-04-01), Sibeud
patent: 4368520 (1983-01-01), Hwang et al.
Hwang Eddie Y.
Shung Wu-shi
Szabo Andras I.
Ostrager Allen M.
Schron D.
Westinghouse Electric Corp.
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