Patent ID: 7596939
Filing Date: 2009-10-06
Classification: F02C,F05D

Abstract:
1. A gas turbine apparatus comprising: an air compressor for compressing air; a combustor capable of combusting the air compressed by said air compressor; a turbine rotatable by a gas discharged from said combustor; a recuperator for exchanging heat between the air supplied from said air compressor to said combustor and an exhaust gas discharged from said turbine; a first fuel supply device operable to supply a fuel having a large heating value to said combustor; a second fuel supply device operable to supply a gas having a lower heating value smaller than the fuel to said combustor; and a switching device operable to switch a fuel to be supplied to said combustor from the fuel having a large heating value to the gas having a lower heating value by switching said first fuel supply device and said second fuel supply device, wherein a switching operation of said switching device is performed when it is determined that said recuperator is heated to a predetermined temperature based on a temperature of the air compressed by said air compressor or the exhaust gas discharged from said turbine.