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:
Sep. 03, 2002
Filed:
Jun. 13, 2000
Robert Sean Talley, Ballston Lake, NY (US);
John Raymond Hawley, Schenectady, NY (US);
Bruce Lockheart Morrison, Fernandina Beach, FL (US);
General Electric Company, Schenectady, NY (US);
Abstract
A combined cycle power plant includes a gas turbine, a steam turbine and a heat recovery steam generator having a duct burner for supplementary firing. In the unfired mode, gas turbine exhaust is used in the heat recovery steam generator for generating steam for the steam turbine. The power plant includes a main steam output line from the heat recovery steam generator connected to the first stage inlet of the high pressure section of the steam turbine. A bypass loop is connected either to an intermediate pressure connection of the HRSG or from the high pressure line to an admission point downstream of the high pressure inlet nozzle, at a lower pressure than the nominal inlet pressure. By operating the bypass system in conjunction with the duct burning process in the HRSG, the steam inlet pressure to the steam turbine can be maintained at the optimal level during both fired and unfired operation of the HRSG. Another potential benefit is a higher output during fired operation than could otherwise be accomplished with a given steam turbine.