Patent ID: 7600962

Claim:
A turbine exhaust system for introducing, to a condenser, exhaust steam after having driven a turbine rotor, the system comprising: an exhaust hood inner casing that surrounds the turbine rotor; an exhaust hood outer casing that covers the exhaust hood inner casing and that forms an exhaust hood connecting with the condenser, together with the exhaust inner casing; a flow guide that is installed contiguously to the outer peripheral part of the final stage moving blade exit annular plane of the rotor, and that forms an annular diffuser flow path for discharging, toward the exhaust steam that has driven the turbine rotor and the passed through the outer peripheral part of the final stage moving blade exit annular plane; and exhaust hood upper part flow guides, each serving as means for separating annular plane upper part exhaust steam that flows within a range including vertical upward flow out of exhaust steam radially discharging from the flow guide into the exhaust hood, from other exhaust steam, to thereby introduce the separated exhaust steam to the condenser, wherein exhaust steam introduction-side end faces thereof, each functioning as a separation boundary between the annular plane upper part exhaust steam and the other exhaust steam, are located further toward the upper side than the horizontal plane containing the central axis of the turbine rotor, and wherein the exhaust hood upper part flow guides extend radially from a position in contact with the flow guide and the exhaust hood inner casing to a position in contact with a top of the exhaust hood outer casing and the exhaust steam introduction-side end faces of the exhaust hood upper part flow guides are provided further toward an upper side of the exhaust hood outer casing than a horizontal plane containing a central axis of the turbine rotor.