Patent ID: 6412269
Filing Date: 2002-07-02
Classification: F01D,F01K,F02C

Abstract:
A method for operating an engine system including a gas turbine engine, an inverted Brayton cycle apparatus coupled to receive discharge exhaust from the engine, and a duct assembly for supplying discharge exhaust from the engine to the inverted Brayton cycle apparatus, the duct assembly including an exhaust collector at an outlet of the engine, a transfer duct connected to an outlet of the collector, and a dump diffuser to straighten the air flow through the transfer duct, the duct assembly further including a door for opening and closing the air flow path through the duct assembly between the engine and the inverted Brayton cycle apparatus, said method comprising the steps of:upon engine start-up, at least partially opening the door; and subsequent to engine start-up, closing the door.