System for cooling cooling air in a gas turbine, and method for cooling cooling air

摘要

Disclosed is a gas and steam turbine plant comprising a cooling system which is configured such that said cooling system is suitable for each operational state and cools cooling air that is bled from the compressed air, and a heat exchanger system which is mounted on the primary side of a cooling air duct that branches off the compressed air duct. Said heat exchanger system transmits heat that is transported in the cooling air to a flow of combustible gas which is fed to the combustion chamber of the gas turbine.