CONTROL METHOD OF INJECTED STEAM FLOW RATE INTO GAS TURBINE

PROBLEM TO BE SOLVED: To provide a control method of injected steam flow rate improving thermal efficiency and reducing noise by setting a sufficiently large target value of steam flow injectable into a gas turbine without causing misfire or other problems at the start of steam injection. SOLUTION:...

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Bibliographische Detailangaben
1. Verfasser:	BANDAI KOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS GAS-TURBINE PLANTS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a control method of injected steam flow rate improving thermal efficiency and reducing noise by setting a sufficiently large target value of steam flow injectable into a gas turbine without causing misfire or other problems at the start of steam injection. SOLUTION: Steam is generated with high temperature exhaust gas of the gas turbine and injected into the gas turbine. The target steam flow rate is computed from a turbine inlet temperature at the start of injection, and the turbine inlet temperature drops with steam injection. A lowered value of the target steam flow rate is thereby predicted, and the target steam flow rate is decreased beforehand by that portion. A rate limiter for the target steam flow rate is provided, and a change rate is suppressed to small to compensate a time-lag of a flow meter. COPYRIGHT: (C)2005,JPO&NCIPI