Patent ID: 6608395
Filing Date: 2003-08-19
Classification: F01D,F01K,F02C,F02D

Abstract:
A system for producing alternating current electric energy comprising:at least two turbines that are mechanically separate but electrically connected, said at least two turbines comprising: (a) an industrial gas turbine type for producing electric power and having a first exhaust outlet; (b) an aeroderivative gas turbine type for producing electric power and having a second outlet, the aeroderivative gas turbine type having a shorter start up time than the industrial gas turbine type; (c) at least one electric generator powered by at least one said industrial gas turbine type or said aeroderivative gas turbine type; (d) at least one heat recovery steam generator positioned to receive exhaust gases from the first outlet of the industrial gas turbine type and to receive exhaust gases from the second exhaust outlet of the aeroderivative gas turbine type; and (e) a steam turbine positioned to receive steam produced from said at least one heat recovery steam generator to thereby drive the steam turbine, the steam turbine being driven during start-up operations by said at least one heat recovery steam generator receiving exhaust gases from the aeroderivative gas turbine type, being driven during low demand operations by said at least one heat recovery steam generator receiving exhaust gases from the industrial gas turbine type, and being driven during high demand operations by said at least one heat recovery steam generator receiving exhaust gases from both the industrial gas turbine type and the aeroderivative gas turbine type.