Patent ID: 7410526

Claim:
A system for the preparation of air in an aircraft comprising a compressor (C) charged with air on the inlet side, comprising a supply air heat exchanger (OHX) which is downstream of the compressor (C), is charged with air compressed in the compressor (C) on the pressurized air side on the inlet side and which is in communication on the pressurized air side on the outlet side with a system (OBIGGS) or unit which is to be supplied with pressurized air, and comprising a turbine (T) which is charged on the inlet side with pressurized air from a pressurized air supply separate from the air supply of the compressor (C) and is in communication on the outlet side with the low pressure side inlet of the supply air heat exchanger (OHX) and which is in communication with the compressor (C) such that the compressor (C) can be driven by the turbine (T), wherein a pressurized air heat exchanger (THX) is disposed upstream of the turbine (T).