Patent ID: 10422281

Abstract:
A cooling system for a gas turbine engine comprises a closed circuit containing a change-phase fluid, at least one heat exchanger configured to receive a first coolant from a first engine system for the change-phase fluid in the closed circuit to absorb heat from the first coolant, whereby the cooling system is configured so that the change-phase fluid at least partially vaporizes when absorbing heat from the at least one heat exchanger. The closed circuit has a cooling exchanger adjacent to an annular wall of a bypass duct, the cooling exchanger configured to be exposed to a flow of cooling air in the bypass duct for the change-phase fluid to release heat to the cooling air and condense at least partially, the cooling exchanger having conduits configured to feed the vaporized change-phase fluid from a heat exchange with the at least one heat exchanger to the cooling exchanger, and to direct condensed change-phase fluid by gravity from the cooling exchanger to the at least one heat exchanger.