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:
Mar. 27, 2012
Filed:
Nov. 09, 2007
Satoshi Tanaka, Takasago, JP;
Shoichi Harada, Takasago, JP;
Kozo Toyama, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
Extremely cold (e.g., −20° C.) air A is heated by a heat exchanger, which is supplied with steam S via a control valve, and heated air A' is taken into a gas turbine. The valve opening degree of the control valveis feedback-controlled so that the deviation between the measured temperature tand the target temperature TO of the heated air A′ is eliminated. Further, when the number of revolutions, N, of the gas turbineincreases, or when an IGV opening degree OP increases, the valve opening degree of the control valveis feedforward-controlled in accordance with the increase in the number N of revolutions or the increase in the IGV opening degree OP. By so doing, the temperature of air A′ can be maintained at a temperature enabling stable combustion without delay in control, and intake air can be heated without delay in control, even at the start of the gas turbine or during change in the opening degree of an inlet guide vane.