Cooling systems

Power plants – Reaction motor – Interrelated reaction motors

Reexamination Certificate

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C060S730000, C060S736000

Reexamination Certificate

active

11174740

ABSTRACT:
Apparatus for maintaining the temperature of a component of a gas turbine engine below a predetermined maximum working temperature comprises a reservoir for a cooling fluid having a boiling point below the working temperature and in which the component is immersed or with which it is in contact. At least two heat exchangers are associated with the reservoir and operable to effect condensation of vaporised cooling fluid and return of same to the reservoir. Preferably the apparatus is a closed system incorporating three heat exchangers respectively adapted to effect heat exchange with engine fuel, compressed air derived from a fan or low pressure compressor of the engine and ambient air. Means may advantageously be provided to ensure return of condensed cooling fluid to the reservoir when the attitude of the reservoir is altered as a result of aircraft maneuvers.

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patent: 6931834 (2005-08-01), Jones
patent: 7082778 (2006-08-01), Patel et al.

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