Electric heating – Heating devices – With power supply and voltage or current regulation or...
Reexamination Certificate
2006-05-30
2006-05-30
Paschall, Mark (Department: 3742)
Electric heating
Heating devices
With power supply and voltage or current regulation or...
C219S496000, C219S497000, C392S324000, C122S448100, C060S775000, C060S039300
Reexamination Certificate
active
07053341
ABSTRACT:
A method for controlling the level of a drum in a drum-type boiler includes adjusting a gain of a drum level PID (such as a Proportional Integral Derivative control) in accordance with a signal representative of a set of tuning constants, a signal representative of drum level, and a signal representative of a drum level setpoint. The method also includes utilizing a flow control PID to adjust a drum level control valve, wherein the flow control PID adjusts the drum level control valve in accordance with an output of the drum level PID, a signal representative of steam flow, and a signal representative of drum feedwater flow.
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Arora Manu Dev
Lennon Matthew
Norman Bruce Gordon
Smith Raub Warfield
Tomlinson Leroy Omar
Armstrong Teasdale LLP
General Electric Company
Paschall Mark
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