Air conditioning system
AssigneeHoneywell Normalair-Garrett (Holdings) Limited
InventorsRichard James Axe, Richard Grant Hunt
Life of this patent
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Abstract
An air conditioning system for an aircraft in which cabin air is recirculated and mixed with cold air from an air conditioning machine which includes at least one expansion turbine over which warm pressurized air is expanded and cooled, and wherein the system includes a heat exchanger in which a heat load from hot cabin air is exchanged with the warm pressurized air prior to the pressurized air being expanded by the expansion turbine, further including a condenser heat exchanger in which recirculating cabin air is used to cool and promote water removal from the warm pressurized air before it is expanded by the expansion turbine.
Claims8
An air conditioning system for an aircraft, in which cabin air is recirculated and mixed with cold air from an air conditioning machine which includes at least one expansion turbine over which warm pressurised air is expanded and cooled, and further includes a heat load exchanger in which a heat load from hot cabin air is exchanged with the warm pressurised air prior to the pressurised air being expanded by the expansion turbine;
- and wherein there is a condenser heat exchanger in which recirculating cabin air is brought into heat exchange relationship with the warm pressurised air to cool and promote water removal therefrom prior to its being expanded by the expansion turbine.
A method of operating an air conditioning system in an aircraft of the kind in which cabin air is recirculated and mixed with cold air from an air conditioning machine which includes at least one expansion turbine over which warm pressurised air is expanded and cooled, and wherein the system includes a load heat exchanger in which a heat load from hot cabin air is exchanged with the warm pressurised air prior to the pressurised air being expanded by the expansion turbine;
- the method including bringing recirculating cabin air into heat exchange relationship with the warm pressurised air prior to the pressurised air being expanded by the expansion turbine, to cool and assist in removing water from the warm pressurised air.
Dependencies are inferred from the claim text.