Power plant comprising a turbine unit and a generator

Abstract

A power plant including a turbine unit having a turbine, a generator connected to the turbine for power transmission, and a cooling device for cooling the generator is provided. The cooling device is provided to release waste heat from the generator to a device of the power plant. Waste heat may be used in the power plant process, thus attaining increased efficiency.

1 . A power plant ( 2 ,  44 ) comprising a turbine unit ( 4 ) having a turbine ( 10 ), a generator ( 24 ) connected to the turbine ( 10 ) for power transmission and a cooling device ( 30 ,  36 ) for cooling the generator ( 24 ),
 characterized in that the cooling device ( 30 ,  36 ) is provided for releasing waste heat from the generator ( 24 ) to a device of the power plant ( 2 ,  44 ).   
     
     
         2 . The power plant ( 2 ) as claimed in  claim 1 ,
 characterized in that the turbine unit ( 4 ) includes a fuel preheater ( 20 ) which is thermally connected to the cooling device ( 30 ).   
     
     
         3 . The power plant ( 2 ) as claimed in  claim 2 ,
 characterized in that the fuel preheater ( 20 ) has a heat exchanger which is thermally connected to a cooling circuit ( 26 ) of the cooling device ( 30 ).   
     
     
         4 . The power plant ( 2 ) as claimed in one of the preceding claims, characterized in a fuel feed ( 18 ) to the turbine ( 10 ) is routed through the generator ( 24 ) for heating the fuel. 
     
     
         5 . The power plant ( 2 ,  44 ) as claimed in one of the preceding claims,
 characterized in that the turbine unit ( 4 ) has an air feed ( 14 ) which is thermally connected to the cooling device ( 30 ,  36 ).   
     
     
         6 . The power plant ( 2 ,  44 ) as claimed in one of the preceding claims,
 characterized by a control means ( 34 ) for controlling a supply of heat from the generator ( 24 ) to an air feed ( 14 ) of the turbine unit ( 4 ), depending on a danger of icing up of the air feed ( 14 ).   
     
     
         7 . The power plant ( 2 ,  44 ) as claimed in one of the preceding claims,
 characterized in that the cooling device ( 30 ,  36 ) has an open cooling circuit and a cooling air feed to an air feed ( 14 ) of the turbine unit ( 4 ).   
     
     
         8 . The power plant ( 2 ) as claimed in one of the preceding claims, characterized in that the turbine unit ( 4 ) has an air preheater which is thermally connected in a cooler stage to the cooling device ( 30 ) and in a warmer stage to a flue gas feed. 
     
     
         9 . The power plant ( 44 ) as claimed in one of the preceding claims, characterized in that the cooling device ( 36 ) is thermally connected to a feed water circuit ( 50 ) of the turbine unit ( 4 ). 
     
     
         10 . The power plant ( 44 ) as claimed in one of the preceding claims, characterized in that the cooling device ( 36 ) includes a cooling water circuit which is part of a feed water circuit ( 50 ) of the turbine unit ( 4 ). 
     
     
         11 . The power plant ( 2 ) as claimed in one of the preceding claims, characterized in that the cooling device ( 30 ,  36 ) is thermally connected to a building heating system of the power plant ( 2 ).