Power plants – Combustion products used as motive fluid – Process
Reexamination Certificate
2006-08-29
2006-08-29
Casaregola, Louis J. (Department: 3746)
Power plants
Combustion products used as motive fluid
Process
C060S039240, C060S645000, C415S001000, C415S013000, C417S001000, C417S046000
Reexamination Certificate
active
07096669
ABSTRACT:
Many variables in processes such as those using turbocompressors and turbines must be limited or constrained. Limit control loops are provided for the purpose of limiting these variables. By using a combination of closed loop and open loop limit control schemes, excursions into unfavorable operation can be more effectively avoided. Transition between open loop and closed loop may be enhanced by testing the direction and magnitude of the rate at which the limit variable is changing. If the rate of change indicates recovery is imminent, control is passed back to the closed loop limit control function.
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COPY—pp. 75-79 from a Series 3 Plus Antisurge Controller-for Axial and Centrifugal Compressors Manual by Compressor Controls Corporation—dated Feb. 1999.
COPY—pp. 82-88 from a Series 3 Plus Antisurge Controller-for Axial and Centrifugal Compressors Manual by Compressor Controls Corporation—dated Feb. 1999.
COPY—pp. 83-84 from a Series 3 Plus Speed Controller for Stream Turbines Manual by Compressor Controls Corporation—dated Feb. 2001.
Fisher Paul F.
Narayanan Krishnan
Casaregola Louis J.
Compressor Controls Corp.
Sturm & Fix LLP
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