In accordance with at least one aspect of this disclosure, a system includes, an environmental control system (ECS) having a plurality of ducts configured to convey a flow of air into an interior space through the plurality of ducts, a plurality of valves disposed in the plurality of ducts to control the flow of air through a respective duct into the interior space, an overhead bin mounted in the interior space below the plurality of ducts relative to the direction of airflow, and a diffuser disposed at an outlet of the plurality of duct configured to induce the airflow to flow along a convex outer surface of the overhead bin.

A heat exchanger system and method includes a securing frame, a heat transfer core having heat transfer panels removably secured to the securing frame, the heat transfer panels optionally including a plurality of segment modules coupled together, and one or more filter screens removably secured to the securing frame at one or both of an inlet end or an outlet end. The heat transfer core is disposed between the inlet end and the outlet end.

An isolation section assembly includes a section housing defining an interior space. The section housing includes a door with access to the interior space. The isolation section assembly includes an enclosure abutting the door. The airlock enclosure defines an interior airlock space. The interior airlock space is configured and adapted to be at a negative pressure relative to a cabin area. An air recirculation system in fluid communication with at least one of the interior space of the section housing or the interior airlock space.

Separators for use with gas turbine engines are disclosed herein. An example separator disclosed herein includes a first ring including a first surface, a second surface opposite the first surface, and a first opening extending from the first surface to the second surface, a second ring surrounding the first ring, the second ring including a third surface, a fourth surface, and a second opening extending from the first surface to the second surface, and a filter disposed between the first ring and the second ring, the filter disposed in a fluid pathway extending between the first opening and the second opening.

A shroud for a J-tube of an air conditioning pack of an aircraft includes a first partial shroud piece and a second partial shroud piece that mate together to form a flow tube and a sleeve. The flow tube includes an inlet, an outlet fluidly connected to the inlet and disposed on an opposite end of the flow tube from the inlet, and a sidewall extending between the inlet and the outlet. The sleeve extends through a portion of the flow tube and out of the sidewall and is configured to contain a portion of the J-tube.

An air management system for a common indoor room or space that comprises a plurality of air outflow apertures or vents, a plurality of air curtains having at least a portion of the air curtains separated from one another, a plurality of separated air suction intakes, and an air sterilization and/or air cleaning mechanism.

A vapor cycle cooling system includes first and second compressor systems in parallel with one another, each compressor system including a motor, a motor controller, and a first compressor in series with a second compressor; a condenser fluidically coupled to each compressor system; a filter drier, in series with, and fluidically coupled to the condenser; a first expansion device in series with, and fluidically coupled to, a flash heat exchanger, the flash heat exchanger fluidically coupled to a second expansion device, the second expansion device fluidically coupled to a first evaporator, the first evaporator fluidically coupled to each compressor system; a system controller electrically coupled to each motor controller; and a motor and motor controller cooling loop fluidically coupled to the filter drier and each motor, wherein the vapor cycle cooling system is configured to cool one or more thermal loads for a vehicle.

Methods and apparatus to direct ventilation of vehicle occupants are disclosed. A disclosed example apparatus includes an air supply duct of a cabin of a vehicle, a manifold fluidly coupled to the air supply duct, the manifold to extend to occupant seats of the cabin, and nozzles fluidly coupled to the manifold, the nozzles to be positioned to face toward a front of a face of an occupant when the occupant occupies one of the occupant seats.

An air supply system including a conduit for channeling a flow of air therethrough, wherein the flow of air has microorganisms entrained therein. The system also includes an anti-microbial filter in flow communication with the flow of air. The anti-microbial filter includes a plurality of atomically sharp surface features for non-selective lysing of at least some of the microorganisms that contact the anti-microbial filter.

An air management system of a vehicle having a conditioned area includes at least one duct defining a flow path for delivering air to the conditioned area and a sterilization system associated with the at least one duct. The sterilization system including at least one light source operable to emit a germicidal ultraviolet light into the flow path defined by the at least one duct to sterilize the air to be provided to the conditioned area.