Hyperloop environmental control system

An environmental control system for conditioning a cabin of a vehicle positioned in an enclosed air-evacuated environment, the environmental control system comprising:

• a first inlet for receiving a flow of a first source of a medium;
• a second inlet for receiving a flow of a second source of a medium;
• a thermodynamic device fluidly coupled to both the first inlet and the second inlet, the thermodynamic device including a compressor and at least one turbine operably coupled by a shaft;
• at least one conduit fluidly coupled to the second inlet, the at least one conduit bypassing the thermodynamic device;
• a mixing point fluidly coupled to an outlet of the at least one turbine and fluidly coupled to the at least one conduit;
• a recirculation heat exchanger fluidly coupled to an outlet of the thermodynamic device and to the at least one conduit upstream from the mixing point;
• and
• wherein the at least one conduit fluidly coupled to the second inlet and to the mixing point further comprises a bypass conduit fluidly coupled to the mixing point and configured to bypass the recirculation heat exchanger.

An environmental control system for conditioning a cabin of a vehicle positioned in an enclosed air-evacuated environment, the environmental control system comprising:

• a first inlet for receiving a flow of a first source of a medium;
• a second inlet for receiving a flow of a second source of the medium;
• a thermodynamic device fluidly coupled to both the first inlet and the second inlet, the thermodynamic device including a compressor and at least one turbine operably coupled by a shaft;
• at least one conduit fluidly coupled to the second inlet, the at least one conduit bypassing the thermodynamic device;
• a mixing point fluidly coupled to an outlet of the at least one turbine and fluidly coupled to the at least one conduit;
• a recirculation heat exchanger fluidly coupled to an outlet of the thermodynamic device and to the at least one conduit upstream from the mixing point;
• and
• a circulation fan operably coupled to the at least one conduit fluidly coupled to the second inlet, the circulation fan being configured to pump a portion of the second source of the medium through the at least one conduit to the mixing point and to move air within the cabin.