An aircraft fuel cell system includes a fuel cell which has an oxidant inlet for supplying an oxygen-containing medium to the fuel cell. An oxidant supply line has a first end which is connected to the oxidant inlet of the fuel cell. A second end of the oxidant supply line is connectable to a used a
An aircraft fuel cell system includes a fuel cell which has an oxidant inlet for supplying an oxygen-containing medium to the fuel cell. An oxidant supply line has a first end which is connected to the oxidant inlet of the fuel cell. A second end of the oxidant supply line is connectable to a used air outlet of a cabin of the aircraft. A heat exchanger is located in the oxidant supply line and thermally couples the oxygen-containing medium flowing through the oxidant supply line and a second medium flowing through an air conditioning process air line of an air conditioning unit, the heat exchanger being located downstream of a cabin air compressor in the air conditioning process air line.
대표청구항▼
1. 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 fu
1. 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, anda 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. 2. An aircraft according to claim 1, further comprising: a compressor arranged in the oxidant supply line. 3. An aircraft according to claim 2, wherein the compressor arranged in the oxidant supply line is located downstream, in the direction of flow of the oxygen-containing medium, of the heat exchanger such that a temperature difference between the oxygen-containing medium and the second medium at the heat exchanger is maximized. 4. An aircraft according to claim 1, further comprising: a bypass line for bypassing the heat exchanger, anda valve for controlling a temperature of the oxygen-containing medium flowing through the oxidant supply line by controlling flow through the bypass line. 5. An aircraft according to claim 1, wherein the oxidant supply line is connectable to a ram air duct of the aircraft via an ambient air line. 6. An aircraft according to claim 1, wherein a waste gas outlet of the fuel cell is connected to an expansion device. 7. An aircraft according to claim 1, further comprising: a plurality of fuel cells and a plurality of compressors, with a compressor being associated with each fuel cell. 8. A method for operating an aircraft having a fuel cell system and an air conditioning unit, the method comprising: operating a fuel cell having an oxidant inlet for supplying an oxygen-containing medium to the fuel cell, with the oxidant inlet of the fuel cell being connected to a first end of an oxidant supply line,supplying used air from a used air outlet of a cabin of the aircraft to the oxidant inlet of the fuel cell via the oxidant supply line, the used air outlet of the cabin being connected to a second end of the oxidant supply line, andusing a heat exchanger arranged in the oxidant supply line to thermally couple and transfer heat energy between the oxygen-containing medium flowing through the oxidant supply line and a second medium which flows 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. 9. A method according to claim 8, further comprising: controlling a temperature of the oxygen-containing medium flowing through the oxidant supply line with a bypass line for bypassing the heat exchanger and a valve controlling flow through the bypass line. 10. A method according to claim 8, further comprising: supplying ram air from a ram air duct of the aircraft to the oxidant supply line via an ambient air line. 11. A method according to claim 8, further comprising: supplying fuel cell waste gas emerging from a waste gas outlet of the fuel cell to an expansion device, andexpanding the fuel cell waste gas to atmospheric pressure level with the expansion device. 12. A method according to claim 8, further comprising: compressing the oxygen-containing medium with a compressor arranged in the oxidant supply line, the compressor being located downstream, in the direction of flow of the oxygen-containing medium, of the heat exchanger such that a temperature difference between the oxygen-containing medium and the second medium at the heat exchanger is maximized.
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이 특허에 인용된 특허 (2)
Graage Klaus,DEX, Energy supply unit on board an aircraft.
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