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:
Feb. 27, 1996
Filed:
Dec. 14, 1994
Henrik Nielsen, Wettingen, CH;
ABB Management AG, Baden, CH;
Abstract
A method for operating a gas turbine selectively in a simple cycle or in a combined steam turbine cycle increases the efficiency of the installation and provides easy switch-over from the simple cycle to the combined cycle, and at the same time providing for cooling the cooling air for the gas turbine. The method in accordance with the invention includes the steps of using the exhaust gas from the gas turbine to generate steam in a waste heat boiler for the steam cycle. A heat exchanger for cooling the cooling air is disposed in a duct for introducing a gaseous medium for mixing with the gas turbine exhaust. The gaseous medium cools the cooling air and is accordingly heated. The heated gaseous medium is mixed with the exhaust gas of the turbine, and the mixture directed to the waste heat boiler to generate steam for the steam turbine for operating in the combined cycle. In the simple cycle, the mixture is released to the atmosphere. A simply operated duct selectively directs the flow of the mixture.