Air-conditioning system for airplane cabin
AssigneeLiebherr-Aerospace Lindenberg GmbH
InventorAlfred Sauterleute
Life of this patent
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Abstract
An air-conditioning system in particular for aircraft is proposed wherein pressuized, moisture-containing air is conditioned for air-conditioning the cabin. The pressurized air is compressed further in two separate stages, dehumidified in a high-pressure water extraction cycle and subsequently expanded in one or two turbine stages. Depending on the design one can thereby achieve ice-free conditioned air or a high efficiency of the air-conditioning-system, in particular if two turbine stages are provided and the energy gained in the particular turbine stages is utilized regeneratively, distributed over the compressor stages.
Claims15
A method for conditioning moisture-containing, pressurized air for air-conditioning a room, comprising:
- compressing the pressurized air to a higher pressure;
- dehumidifying the compressed air by condensing and extracting water from the compressed air;
- expanding the dehumidified air to a lower pressure;
- passing on the conditioned air for air-conditioning a room;
- wherein regenerated process energy is utilized in the other of the two compression stacs;
- and
- wherein expansion of the air is effected in two separate stages by means of first and second turbines, and the energy gained with the first turbine is utilized regeneratively at least partly in the second compression stage and the energy gained with the second turbine at least partly in the first compression stage, or vice versa.
An air-conditioning system for conditioning moisture-containing, pressurized air for air-conditioning a room, the system
- a compressor device for compressing the pressurized air to a higher pressure;
- a condenser and following water extractor for dehumidifying the compressed air;
- an expansion device for expanding the dehumidified air to a lower pressure;
- an output line for passing on the conditioned air for air-conditioning a room;
- wherein the compressor device is of two-stare construction and comprises first and second separately driven compressors, and the expansion device comprises a first turbine coupled with one of the two compressors for driving the same;
- and
- wherein the expansion device is of two-stage design and comprises a second turbine coupled with the other of the two compressors for driving the same.
Dependencies are inferred from the claim text.