Patent ID: 8623566

Claim:
An aircraft having a fuel cell system and an air conditioning unit, with the fuel cell system comprising: a fuel cell which has an oxidant inlet for supplying an oxygen-containing medium to the fuel cell, an oxidant supply line including a first end that is connected to the oxidant inlet of the fuel cell and including a second end that is connected to a used air outlet of a cabin of the aircraft, and a heat exchanger which is arranged in the oxidant supply line, wherein the heat exchanger thermally couples and transfers heat energy between the oxygen-containing medium flowing through the oxidant supply line of the fuel cell system and a second medium flowing through an air conditioning process air line of the air conditioning unit the heat exchanger being located downstream, in the direction of flow of the second medium, of a cabin air compressor arranged in the air conditioning process air line such that the second medium is compressed by the cabin air compressor and thereafter flows to the heat exchanger for transfer of heat energy with the oxygen-containing medium.