Environmental control system for aircraft with improved efficien

Refrigeration – Air compressor – cooler and expander type – Motor-type expander

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62172, F25D 900

Patent

active

043121918

ABSTRACT:
This invention relates to an airconditioning system to provide environmental control for an aircraft's cabin or cockpit. The system cooling cycle includes in combination: a rotary power supply and a turbomachine which includes a power compressor secured to a power shaft for providing compressed air. The rotary power supply is drivingly coupled to the power shaft to operate at a given speed. An expansion cooling turbine is mounted on a shaft concentric to the power shaft. A power driven fan is provided for directing a source of ambient air to and through a heat exchanger. The power compressor is coupled respectively to the cabin and through the heat exchanger to an input of the expansion cooling turbine to thereby draw air from the cabin and deliver the compressed air to the expansion cooling turbine. The expansion cooling turbine is designed to operate at a different speed than the given speed of the power shaft. In the final portion of the system, the expansion cooling turbine has an output coupled to the cabin to deliver conditioned air, which has been cooled, to the cabin. The system heating cycle relies on heated bleed air mixed with cooled air from the expansion turbine to heat the cabin.

REFERENCES:
patent: 2721456 (1955-10-01), Whitney, Jr. et al.
patent: 2767561 (1956-10-01), Seeger
patent: 3404538 (1968-10-01), Kinsell
patent: 3428242 (1969-02-01), Rannenberg
patent: 3523428 (1970-08-01), Nagyszalanczy
patent: 3877246 (1975-04-01), Schultze

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