Air-conditioning system for airplane cabin

Details Air-conditioning system for airplane cabin Air-conditioning system for airplane cabin

B - Operations, Transporting

64

D

B64D 13/08 (2006.01) B64D 13/06 (2006.01) F25B 9/00 (2006.01)

Patent

CA 2327186

An air-conditioning system for airplanes in which a portion of the fresh airflow is tapped at high pressure from a power unit and another portion is sucked in from the ambient air. The energy potential of the tapped airflow is utilized to compress the ambient air. The compressed ambient air and the tapped air are mixed before the pressure of the combined airflow is reduced by passage through one or more turbine stages. Water is separated from the mixed airflow between the mixing point and the first turbine stage. In order to cool the tapped airflow to a temperature at which water can be separated, the tapped airflow is passed in a heat exchaning manner past the entire cooler mixed airflow, preferably in two steps, one before pressure reduction and one after the pressure reduction of the mixed airflow in the first turbine stage. The ambient air can be compressed in two steps, by using two compressor wheels and two turbine wheels mounted together on a shaft.

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