Low pressure turbine with two independent condensing systems

Abstract

A low-pressure turbine and a steam power plant with a low-pressure turbine ( 1 ) is suggested that is connected to an additional condensing system ( 25 ), thus allowing to maintain the electric output at a high level, even if the main condensing system ( 17 ) has a reduced capacity due to cooling water restrictions.

1 . A low-pressure turbine ( 1 ) of a steam power plant comprising an inner casing ( 3 ) and an exhaust hood ( 7 ), wherein the outer casing ( 7 ) is connected to a main condensing system ( 17 ), characterized in, that the exhaust hood ( 7 ) comprises at least one further exhaust steam-opening ( 11 ) that is connected to an additional condensing system ( 25 ). 
     
     
         2 . The low-pressure turbine ( 1 ) according to  claim 1 , that the inner casing ( 3 ) comprises at least one extraction point ( 39 ) for steam condensation enthalpy emission. 
     
     
         3 . A low-pressure turbine ( 1 ) of a steam power plant comprising an inner casing ( 3 ), wherein the inner casing ( 3 ) comprises at least one extraction point ( 39 ) for steam, that at least one extraction point ( 39 ) is connected to an additional condensing system ( 25 ). 
     
     
         4 . The low-pressure turbine ( 1 ) according to  claim 3 , that an exhaust hood ( 7 ) is connected to main condensing system ( 17 ). 
     
     
         5 . The low-pressure turbine ( 1 ) according to  claim 3 , that downstream of the at least one further exhaust steam-opening ( 11 ) and/or downstream of the at least one extraction point ( 39 ) and upstream of the additional condensing system ( 25 ) a control valve ( 27 ), preferably a butterfly valve, and/or a non-return valve ( 29 ) is installed. 
     
     
         6 . A steam power plant with a low-pressure turbine ( 1 ) and a main condensing system ( 17 ), that the low-pressure turbine ( 1 ) is a low-pressure turbine according to one of the foregoing claims and that the steam power plant comprises an additional condensing system ( 25 ). 
     
     
         7 . The steam power according to  claim 6 , that the second condensing system ( 25 ) is of evaporative cooling, non-evaporative cooling and/or once through cooling type.