Abstract: A heat recovery system for supplementing the exhaust mass flow from a gas turbine with additional flow of preheated air to provide greater steam output from a heat recovery unit such as a steam generator. The supplemental preheated air is ambient ventilation air which is used to cool the outer enclosure of the gas turbine. A diverter valve is employed to selectively add to the mass flow from the gas turbine any appropriate mass flow of the ventilation air between zero and a maximum amount. An eductor may be used to aid a blower for moving the supplemental air. A duct burner upstream from the heat recovery unit is employed to raise the temperature of a mixture of turbine exhaust gases and ventilation air being supplied to the heat recovery unit. In a similar fashion, supplemental preheated air may be taken from air used for cooling a generator or other primary load being driven by the gas turbine.

Abstract: A high speed centrifugal compressor is closely directly coupled to the power turbine of a two-shaft gas turbine having a gas generator section separate from its power turbine. Through the direct close coupling and centerline mounting of the gas turbine exhaust casing for free and uniform heat expansion, alignment between stationary and rotating parts of the power turbine and compressor is maintained free from mechanical problems. The compressor stage assembly elements are conveniently interfitted together in the vertically split compressor casing by means of compression bolts minimizing fastening means. Bearings and oil seals are fed by an integrated lubrication and sealing oil system utilizing a compact oil distribution manifold assembly incorporating a quick filter change structure. The turbine fuel distribution system includes means permitting ready replacement and maintenance of individual fuel nozzles without disassembly of the entire fuel nozzle system.

Abstract: A fuel distribution system for a gas turbine-compressor includes means permitting ready replacement and maintenance of individual fuel nozzles without disassembly of the entire fuel nozzle system. The gas turbine-compressor finds particularly useful application in areas where high power, compact, relatively maintenance-free units are required, as, for example, on offshore platforms in the natural gas industry.

Abstract: A high speed centrifugal compressor is closely directly coupled to the power turbine of a two-shaft gas turbine having a gas generator section separate from its power turbine. Through the direct close coupling and center-line mounting of the gas turbine exhaust casing for free and uniform heat expansion, alignment between stationary and rotating parts of the power turbine and compressor is maintained free from mechanical problems. Bearings and oil seals are fed by an integrated lubrication and a sealing oil system utilizing a compact oil distribution manifold assembly incorporating a quick filter change structure. The gas turbine-compressor finds particularly useful application in areas where high power, compact, relatively maintenance-free units are required, as, for example, on offshore platforms in the natural gas industry.

Abstract: A high speed centrifugal compressor is closely directly coupled to the power turbine of a two-shaft gas turbine having a gas generator section separate from its power turbine. The compressor stage assembly elements are conveniently interfitted together in the vertically split compressor casing by means of compression bolts minimizing fastening means. The gas turbine-compressor finds particularly useful application in areas where high power, compact, relatively maintenance-free units are required, as, for example, on offshore platforms in the natural gas industry.