Power plants – Motive fluid energized by externally applied heat – Having condition responsive control
Reexamination Certificate
2005-01-28
2008-03-04
Nguyen, Hoang (Department: 3748)
Power plants
Motive fluid energized by externally applied heat
Having condition responsive control
C060S670000
Reexamination Certificate
active
07337613
ABSTRACT:
The present invention involves a system for controlling the electric charge within the exhaust hood and condenser of a steam turbine by using shaft current as an indirect measurement of exhaust charge, and then adjusting the pH accordingly. The present invention uses the turbine-generator shaft12instead of a probe, and therefore measures the potential of the current in the shaft to the ground. This measurement32is then fed into a control unit40which adjusts the chemical feed42to the feedwater supply44of the steam turbine system.
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Nguyen Hoang
Siemens Power Generation, Inc.
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