Mixing bleed and ram air at a turbine inlet of a compressing device
An air conditioning system for an aircraft is provided. The air conditioning system includes a first rotating component and a second rotating component. The first rotating component includes a compressor and a turbine. The compressor pressurizes a first medium. The first turbine receives a mixture of a second medium and a pressurized form of the first medium. The second rotating component includes a fan.
1. An air cycle machine for an environmental control system for an aircraft, the air cycle machine comprising:
a compressor configured to pressurize a first medium;
a first turbine configured to receive a mixture of a second medium and a pressurized form of the first medium;
a second turbine configured to receive a third medium; and
a fan,
wherein the first medium comprises fresh air sourced from outside the aircraft, and
wherein the second medium comprises bleed air sourced from a turbine engine or an auxiliary power unit,
wherein the first and second mediums are mixed upstream of the first turbine to produce the mixture.
2. The airplane of claim 1 , wherein the third medium comprises cabin discharge air.
3. The air cycle machine of claim 1 , further comprising a shaft mechanically coupling the compressor, the first turbine, the second turbine, and the fan.
4. The air cycle machine of claim 3 , wherein the first turbine is on a first end of the shaft.
5. The air cycle machine of claim 3 , wherein the fan is on a second end of the shaft.
6. The air conditioning system of claim 5 , wherein a second rotating component environmental control system comprises a motor.
7. The air conditioning system of claim 5 , wherein a second rotating component environmental control system comprises a second turbine.
8. The air conditioning system of claim 7 , wherein the second turbine and the fan are an integral rotor.
9. The air conditioning system of claim 7 , further comprising a shaft coupling the fan and the second turbine.