초록 ▼

An environmental control system includes a turbomachine and an air cycle machine that is driven by shaft power of the turbomachine. The turbomachine includes a compressor, which supplies compressed bleed air to the air cycle machine. Ambient air is compressed by the compressor, and heat of compressi

An environmental control system includes a turbomachine and an air cycle machine that is driven by shaft power of the turbomachine. The turbomachine includes a compressor, which supplies compressed bleed air to the air cycle machine. Ambient air is compressed by the compressor, and heat of compression is removed by an air-to-air heat exchanger, which envelops the turbomachine. The cooled, compressed air is expanded in the air cycle machine to produce a stream of cooled, conditioned air. Ambient air used by the air-to-air heat exchanger to cool the compressed bleed air is drawn into the turbomachine's exhaust by an eductor.

대표청구항 ▼

1. An environmental control system comprising: a turbomachine; an air cycle machine driven by shaft power of the turbomachine, the air cycle machine including a compressor and a cooling turbine; and an air-to-air heat exchanger for cooling bleed air from the compressor en route to the coolin

1. An environmental control system comprising: a turbomachine; an air cycle machine driven by shaft power of the turbomachine, the air cycle machine including a compressor and a cooling turbine; and an air-to-air heat exchanger for cooling bleed air from the compressor en route to the cooling turbine, the heat exchanger being wrapped around at least a portion of the air cycle machine, the heat exchanger having a quad-shaped design. 2. The system of claim 1, wherein the turbomachine includes a power turbine, and wherein the power turbine and the cooling turbine are mounted on a single shaft.3. The system of claim 1, wherein the air-to-air heat exchanger includes four separate modules.4. The system of claim 1, wherein the turbomachine includes a power turbine and an eductor downstream the power turbine, the eductor being operative to draw ambient air into the turbomachine and past the air-to-air heat exchanger.5. The system of claim 4, wherein the turbomachine further includes a duct for ducting the air drawn past the air-to-air heat exchanger towards an outlet of the turbomachine, the ducted air being mixed with a power turbine exhaust stream leaving the power turbine.6. An environmental control system comprising: a turbomachine; an air cycle machine driven by shaft power of the turbomachine, the air cycle machine including a compressor and a cooling turbine; an air-to-air heat exchanger for cooling bleed air from the compressor en route to the cooling turbine, the heat exchanger being wrapped around at least a portion of the air cycle machine; a combustor; and a fuel cell having an oxidant inlet coupled to an outlet of the compressor, the fuel cell having an oxidant-outlet coupled to an inlet of the combustor. 7. The system of claim 6, wherein the turbomachine further includes a recuperator for heating air flowing from the compressor outlet to the oxidant inlet of the solid oxide fuel cell.8. The system of claim 6, further comprising an electrical machine, the electrical machine and the fuel cell being capable of providing a controlled electrical output.