Supercharged combined cycle system with air flow bypass to HRSG and fan

摘要

A supercharging system includes a fan providing an air flow, and a prime mover that drives the fan. A duct directs a first portion of the air flow to a gas turbine system, a main bypass subsystem diverts a second portion of the air flow to a heat recovery steam generator; and a drive bypass subsystem that diverts a third portion of the air flow to the prime mover. The prime mover may be one of an aeroderivative gas turbine, a gas turbine, a reciprocating engine, a steam turbine and an induction motor and a variable frequency drive.

主权项

1. A combined cycle system, comprising:
a gas turbine subsystem having a compressor and an output side that provides an exhaust; an exhaust duct coupled to the gas turbine subsystem; a heat recovery steam generation subsystem coupled to the exhaust duct; a fan that produces an air flow; a prime mover that drives the fan, the prime mover having a drive exhaust; a ducting assembly coupled to the fan that conveys at least a portion of the air flow to the compressor; a main bypass coupled to the fan and the exhaust duct to selectively convey at least a portion of the air flow to an exhaust duct; and a drive bypass coupled to the fan and the prime mover to selectively convey at least a portion of the air flow to the prime mover, wherein the prime mover provides a drive exhaust conduit and further comprising drive ducting assembly that conveys a portion of the drive exhaust to the exhaust duct, the heat recovery steam generation subsystem, and the fan.