Method and apparatus for optimization of feedwater heater liquid

Details Method and apparatus for optimization of feedwater heater liquid Method and apparatus for optimization of feedwater heater liquid

1989-01-17

1991-04-30

Lall, Parshotam S.

Boots, shoes, and leggings

364510, 36457101, 340618, 137392, 137395, 73291, 73 1H, G01F 2322, F16K 3102

Patent

active

050124293

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.

REFERENCES:
patent: 4416153 (1983-11-01), Williams
patent: 4816987 (1989-03-01), Brooks et al.
patent: 4819483 (1989-04-01), Emplit et al.
Standard Operating Procedure Southwestern Engineering Company--Feb. 24, 1977.
Southwestern Engineering Company Letter Jun. 26, 1979.
Utility Products Newsletter, Apr. 1983.
Southeastern Electric Exchange 1983 Annual Conference Apr. 13-15, 1983.
A Review of Salient Conditions Affecting Closed Feedwater Heater Availability and Performance, Jun. 1984.
Feedwater Heater Life Extension Via Programs for Shell Liquid Level, Venting and Allied Systems, Jun. 6-10, 1988.

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