초록 ▼

In a method of cooling the thermally highly stressed units of a gas turbine, a steam quantity (31, 32) which first of all cools a turbine (3, 5) is used, and then the same steam quantity is directed into a combustion chamber (2, 4). After this combustion chamber has been cooled, this steam quantity

In a method of cooling the thermally highly stressed units of a gas turbine, a steam quantity (31, 32) which first of all cools a turbine (3, 5) is used, and then the same steam quantity is directed into a combustion chamber (2, 4). After this combustion chamber has been cooled, this steam quantity is introduced into the burn-out zone of the relevant combustion chamber. In this way, the combustion, designed for low NOx emissions, of the relevant combustion chamber is not affected by this introduction of the steam quantity; furthermore, with this introduced steam quantity, the burn-out zone can be moderated for minimizing the remaining pollutant emissions.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A method of steam cooling a gas-turbine group, including a compressor unit, at least one combustion chamber having a bum-out zone, at least one turbine and at least one generator, said combustion cham

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A method of steam cooling a gas-turbine group, including a compressor unit, at least one combustion chamber having a bum-out zone, at least one turbine and at least one generator, said combustion chamber comprising a combustion zone and a discharge zone, said discharge zone located downstream of said combustion zone, whereby a fuel air mixture flowing through the combustion chamber is ignited and burnt inside said combustion zone, the air being injected exclusively with the fuel, and complete combustion is achieved at a downstream end of the combustion zone, and the combustion is completed when the hot gas resulting from the combustion process enters the discharge zone, the method comprising the steps of:extracting a quantity of steam from a steam source;cooling a wall of at least said one combustion chamber solely with said steam; andadmixing said steam after cooling of the combustion chamber has been performed, with said hot gas flowing in the combustion chamber in the discharge zone, exclusively downstream from the combustion zone, thus avoiding any affection of the combustion process by said steam.