Method and apparatus for optimization of feedwater heater liquid level
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United States of America Patent
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Apr 30, 1991
Grant Date -
N/A
app pub date -
Jan 17, 1989
filing date -
Jan 17, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A processor controlled supervisory apparatus for a liquid level controller of a feedwater heater obtains DCA characteristics and breakpoints thereof in a programmed manner. A plurality of DCA characteristics are obtained for a plurality of load conditions, and the breakpoints and other operating parameters are stored in a database correlating operation parameters with load conditions. Equations describing the relationship between the parameters and the load conditions are determined by the programmed processor and additional data points determined therefrom to provide load-responsive control for liquid level setpoint. A retrofitting apparatus retrofits the inventive supervisory control apparatus onto existing liquid level controllers.
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