POWER GENERATION SYSTEM HAVING COMPRESSOR CREATING EXCESS AIR FLOW AND TURBO-EXPANDER TO INCREASE TURBINE EXHAUST GAS MASS FLOW

摘要

A power generation system may include: a first gas turbine system including a first turbine component, a first integral compressor and a first combustor to which air from the first integral compressor and fuel are supplied. The first integral compressor has a flow capacity greater than an intake capacity of the first combustor and/or the first turbine component, creating an excess air flow. A second gas turbine system may include similar components to the first except but without excess capacity in its compressor. A turbo-expander may be operatively coupled to the second gas turbine system. Control valves may control flow of the excess air flow from the first gas turbine system to at least one of the second gas turbine system and the turbo-expander, and flow of a discharge of the turbo-expander to an exhaust of at least one of the first turbine component and the second turbine component.

主权项

1. A power generation system, comprising:
a first gas turbine system including a first turbine component, a first integral compressor and a first combustor to which air from the first integral compressor and fuel are supplied, the first combustor arranged to supply hot combustion gases to the first turbine component, and the first integral compressor having a flow capacity greater than an intake capacity of at least one of the first combustor and the first turbine component, creating an excess air flow; a second gas turbine system including a second turbine component, a second compressor and a second combustor to which air from the second compressor and fuel are supplied, the second combustor arranged to supply hot combustion gases to the second turbine component; a turbo-expander operatively coupled to the second gas turbine system; a first control valve system controlling flow of the excess air flow along an excess air flow path from the first gas turbine system to at least one of the second gas turbine system and the turbo-expander; and a second control valve controlling flow of a discharge of the turbo-expander to an exhaust of at least one of the first turbine component and the second turbine component.