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:
Jun. 06, 2017
Filed:
Aug. 12, 2014
Mitsubishi Hitachi Power Systems, Ltd., Yokohama, Kanagawa, JP;
Tomomi Koganezawa, Yokohama, JP;
Yasuo Takahashi, Yokohama, JP;
Mitsubishi Hitachi Power Systems, Ltd., Yokohama, JP;
Abstract
A 2-shaft gas turbine can suppress an increase in NOx emission from a combustor even when degradation of compressor efficiency occurs due to a decrease in performance with long-term use. The 2-shaft gas turbine has a gas generator and a power turbine, and includes a controller configured to set, in accordance with a degree of degradation of compressor efficiency computed from measured control parameters, a target speed of the gas generator at a level lower than a target speed in a state where degradation of the compressor efficiency has not occurred. The controller is configured to control the rotating speed of the gas generator on the basis of a difference between the target speed thus set and an actual rotating speed.