Method for operating a gas turbine below its rated power

• Main Authors: KREUTZER PHILIPP, WILKE MARTIN, KLUGE ANDRE, TERTILT MARC, LINK MARCO, STERNEMANN ANSGAR, BOTTCHER ANDREAS, DEUKER EBERHARD
• Format: Patent
• Language: English
• Published: 18.11.2015
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The invention relates to a method for operating a gas turbine below its rated power, in which the CO emissions in the exhaust gas of the gas turbine rise as the gas turbine power which is output lowers, wherein when a predefined limiting value (which can be selected as desired) for the CO emissions is reached or when a predefined limiting value, specified in relative or absolute terms, for the gas turbine power which is output is undershot the combustion temperature in the combustion chamber of the gas turbine is increased. In order to operate the gas turbine with low emissions, there is provision that when there is a constant output of power the increase in the exhaust gas temperature which occurs at the outlet of the gas turbine, as a result of the increase in the combustion temperature, is compensated, at least partially, by adding a liquid or vapourous medium.