Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Patent
1990-10-10
1991-05-28
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
60657, F01K 1302
Patent
active
050183567
ABSTRACT:
A steam turbine system having a steam chest coupled in operating relationship to a steam turbine includes apparatus for controlled heating of the steam chest to reduce thermal stresses. A throttle valve is connected in a steam flow path between a steam source and the steam chest for regulating the flow of steam over a predetermined range of steam flow rates. A temperature sensor is coupled to the steam chest for providing signals indicative of the temperature of the steam chest. A steam leak-off line coupled to the steam chest includes a flow control valve for regulating the flow of steam from the steam chest through the leak-off line, and a controller is coupled in a controlling relationship to the throttle valve and the flow control valve for controlling the flow of steam into and out of the steam chest to effect a controlled warming of the steam chest. The controller is connected to receive the signals from the temperature sensor and is responsive to the signals for controlling warming of the steam chest.
REFERENCES:
patent: 4320625 (1982-03-01), Westphal et al.
patent: 4589255 (1986-05-01), Martens et al.
patent: 4598551 (1986-07-01), Dimitroff, Jr. et al.
patent: 4651533 (1987-03-01), Ura et al.
patent: 4792912 (1988-12-01), Kuramoto et al.
Martin James A.
Silvestri, Jr. George J.
Ulrich Douglas R.
Ostrager Allen M.
Westinghouse Electric Corp.
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