F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
341/95
F01D 17/00 (2006.01) F01D 17/24 (2006.01) F01K 13/02 (2006.01)
Patent
CA 1182192
FORWARD-REVERSE FLOW CONTROL SYSTEM FOR A BYPASS STEAM TURBINE Abstract of the Disclosure A solution to the problem of excessive rotation loss heating in a bypass steam turbine has been provided by the introduction of a reverse flow of steam to the high-pressure section of the turbine during those operating periods in which such heating is of concern. The present invention is directed to a control system for automatically selecting either the forward or reverse steam flow regime as is most appropriate, depending on turbine and other related operating conditions. In a preferred embodiment, the control system includes means for selecting either a forward or reverse flow control signal to govern the steam admission control valves; means for controlling the reverse flow valve and having decisional logic for determining whether the reverse flow valve shall be open or closed; and means for controlling the ventilator valve and having decisional logic for determining whether the ventilator valve shall be open or closed.
386168
Company General Electric
Eckersley Raymond A.
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