Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Patent
1978-12-13
1981-06-16
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
60661, 60686, 165 39, F01K 1700
Patent
active
042729629
ABSTRACT:
At least one heat exchanger section including a conventional heat exchanger is disposed in a dual purpose steam turbine power plant to utilize steam extracted from the steam turbine to one section of the heat exchanger for the purposes of heating process fluid of an industrial process which is conducted through another section of the heat exchanger. The heat exchanger section disclosed herein is comprised of apparatus for controlling the pressure of the extracted turbine steam conducted through the one section of the heat exchanger by regulating the temperature of the industrial fluid supplied to the other section of the heat exchanger. More specifically, the heat exchanger section includes at least one conduit path for returning heated process fluid from an output end to an input end of the heat exchanger section to mix with the process fluid supplied at the input end. A flow control valve is disposed in the conduit path for regulating the flow of returned fluid to the input end. A pressure controller, comprising: a means for generating a signal representative of the pressure of the extracted turbine steam conducted through the heat exchanger; means for generating an error signal between a desired pressure set point signal and the pressure representative signal; and means for controlling the flow control valve as a function of the error signal to converge the error signal to substantially zero, maintains the pressure of the extracted steam conducted through the heat exchanger substantially at its desired pressure set point.
REFERENCES:
patent: 1982060 (1934-11-01), McCallum et al.
patent: 2104333 (1938-01-01), Rosenblad
patent: 3412558 (1968-11-01), Starmer
patent: 3703809 (1972-11-01), Cassidy
Khemlani Moti T.
Viscovich Paul W.
Husar Stephen F.
Ostrager Allen M.
Westinghouse Electric Corp.
Zitelli W. E.
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