Power plants – Combustion products used as motive fluid
Patent
1994-06-14
1995-12-26
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
F02C 950
Patent
active
054776708
ABSTRACT:
A control apparatus of a gas turbine combustor for effecting a stable combustion with limited NOx emission through a control of a fuel flow rate according to a turbine output and a control of a flow rate of intake air mixed with the fuel comprises: means for detecting at least one of the temperature and the humidity of an intake air to be taken into the combustor; means for determining and storing, in advance, a stable combustion limit line between a stable combustion region and an unstable combustion region, on a plane of coordinates of a ratio of fuel flow rate/intake air flow rate or an intake air flow rate and the temperature or the humidity of the intake air, on each turbine load; means for detecting an instant operational point of the combustor on the plane of coordinates; and means for correcting an intake air flow rate or a ratio of fuel flow rate to the intake air flow rate according to an increase in the detected temperature or humidity so that the operational point does not cross the stable combustion limit line.
REFERENCES:
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patent: 3854287 (1974-12-01), Rembold
patent: 4566266 (1986-01-01), Kidd et al.
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patent: 5319919 (1994-06-01), Nakayama et al.
patent: 5327718 (1994-07-01), Iwata et al.
patent: 5349812 (1994-09-01), Taniguchi et al.
Patent Abstracts of Japan vol. 9, No. 235 (M-962) 16, Apr. 1990 & JP-A-2-033 419 (Hitachi), 2 Feb. 1990.
Patent Abstracts of Japan vol. 9, No. 235 (M-415), Sep. 1985 & JP-A-60091 141 (Hitachi), 22 May 1985.
Ikeda Hiraku
Moritomo Yoshikazu
Sasada Tetsuo
Sato Isao
Takaba Minoru
Casaregola Louis J.
Hitachi , Ltd.
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