The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2002
Filed:
Oct. 27, 2000
Hideaki Sugishita, Takasago, JP;
Hidetaka Mori, Takasago, JP;
Kazuo Uematsu, Takasago, JP;
Hideo Matsuda, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
Gas turbine combined cycle system is improved to enhance gas turbine efficiency and combined efficiency by effecting steam-cooling of combustor tail tube and turbine blades. In the combined cycle system comprising; gas turbine ( ) having generator ( ), compressor ( ), combustor ( ), blade cooling air cooler ( ), fan ( ) and turbine ( ); steam turbine ( ) having high pressure turbine ( ), intermediate pressure turbine ( ) and low pressure turbine ( ); and waste heat recovery boiler ( ), saturated water of intermediate pressure economizer ( ) is partially led into fuel heater ( ) for heating fuel and the water cooled thereby is supplied to feed water heater ( ). Steam of intermediate pressure superheater ( ) is led into the combustor tail tube for cooling thereof and the steam is then supplied to inlet of the intermediate pressure turbine ( ). Steam of outlet of the high pressure turbine ( ) is led into the turbine ( ) for cooling blades thereof and the steam used for cooling stationary blades is supplied to the inlet of the intermediate pressure turbine ( ) and the steam used for cooling moving blades is supplied to reheater ( ). Thus, the efficiency is enhanced.