초록 ▼

A cooling system 44 for an electrical generator 42 is disclosed. The cooling system rejects excess heat to the engine fuel through a primary heat exchanger 46 and at low fuel flow rates, supplementarily rejects heat to fan air at a secondary heat exchanger 48 located remotely from the fan duct 30. I

A cooling system 44 for an electrical generator 42 is disclosed. The cooling system rejects excess heat to the engine fuel through a primary heat exchanger 46 and at low fuel flow rates, supplementarily rejects heat to fan air at a secondary heat exchanger 48 located remotely from the fan duct 30. In one embodiment, the secondary heat exchanger is disposed in a nacelle fan compartment 14. In another embodiment, the secondary heat exchanger is disposed in a nacelle core compartment 16.

대표청구항 ▼

A method using a primary heat exchanger and a secondary heat exchanger for removing heat from the cooling fluid of an electrical generator for a turbofan, gas turbine engine, the engine using fuel and operating at a first operating condition in response to a first fuel flow rate and operating at a s

A method using a primary heat exchanger and a secondary heat exchanger for removing heat from the cooling fluid of an electrical generator for a turbofan, gas turbine engine, the engine using fuel and operating at a first operating condition in response to a first fuel flow rate and operating at a second operating condition in response to a second fuel flow, the second fuel flow rate being less than the first fuel flow and occurring at low power operation of the engine, the engine having a flow path for working medium gases, the engine being mounted in a nacelle having at least one nacelle compartment, the nacelle having a fan bypass duct through which the flow path for working medium gases extends, comprising the steps of: transferring heat from the cooling fluid to engine fuel at the primary heat exchanger at the first operating condition and the second operating condition; preventing the flow of working medium gases from the fan bypass duct to the secondary heat exchanger at the first operating condition; flowing working medium gases from the fan bypass duct to a secondary heat exchanger at a location remote from the engine flow path at the second operating condition; transferring heat from the cooling fluid to the working medium gases at the secondary heat exchanger at the second operating condition.