Abstract: An environmental control system includes an environmental control system pack having a trim outlet and a primary outlet. A trim medium is output from the trim outlet and a first medium is output from the primary outlet. An inlet of a mixing manifold is connected to the primary outlet of the at least one environmental control system pack. A trim heat exchanger is connected to the trim outlet and the at least one inlet of the environmental control system pack. Within the trim heat exchanger, the trim medium is arranged in a heat exchange relationship with a second medium. From the trim heat exchanger, the second medium is provided to an inlet of the least one environmental control system pack and the trim medium is mixed with a flow output from an outlet of the mixing manifold.

Abstract: A compressing device for use in an environmental control system includes at least one turbine configured to provide energy by expanding one or more mediums. The one or more mediums provided at an outlet of the at least one turbine form a heat sink within the environmental control system. A compressor is configured to receive energy from the one or more mediums expanded across the at least one turbine. During a first mode of the compressing device, energy derived from a first medium and a second medium of the one or more mediums is used to compress a second medium at the compressor. During a second mode of the compressing device, energy derived from the first medium, the second medium, and a third medium of the one or more mediums is used to compress the second medium at the compressor.

Abstract: An environmental control system of a vehicle includes a first compression device including a compressor, a first turbine, and a power turbine operably coupled by a shaft. The first turbine is configured to receive a first medium, the compressor is configured to receive a second medium, and the power turbine is configured to receive a third medium. A second compression device, separate from the first compression device, includes a second turbine. The environmental control system is operable in a first mode and a second mode. In the first mode, the second medium is provided to the compressor and the second turbine sequentially. In the second mode, the second medium bypasses the second turbine. In in both the first mode and the second mode, only the second medium is provided to an outlet of the environmental control system.

Abstract: An environmental control system includes an inlet configured to receive a medium and a compressing device fluidly connected to the inlet. The compressing device includes a compressor operably coupled to a turbine. An outlet of the compressor is fluidly connected to an inlet of the turbine such that the medium is provided to the compressor and the turbine in series. At least one air-liquid heat exchanger is arranged in fluid communication with the outlet of the compressor and the inlet of the turbine. The at least one air-liquid heat exchanger is also connected to a liquid loop containing a liquid. At least one air-liquid regeneration heat exchanger is fluidly connected to the liquid loop at a location upstream from the at least one air-liquid heat exchanger.

Abstract: A water separator for use in an environmental control system of an aircraft includes a body having a first upstream end, a second downstream end, and plurality of fluidly distinct flow channels extending between the first upstream end and the second downstream end. A flow of medium provided to the water separator is configured to flow through the plurality of fluidly distinct flow channels in parallel.

Abstract: An environmental control system includes an environmental control system pack having a trim outlet and a primary outlet. A trim medium is output from the trim outlet and a first medium is output from the primary outlet. An inlet of a mixing manifold is connected to the primary outlet of the at least one environmental control system pack. A trim heat exchanger is connected to the trim outlet and the at least one inlet of the environmental control system pack. Within the trim heat exchanger, the trim medium is arranged in a heat exchange relationship with a second medium. From the trim heat exchanger, the second medium is provided to an inlet of the least one environmental control system pack and the trim medium is mixed with a flow output from an outlet of the mixing manifold.

Abstract: An environmental control system of an aircraft includes a plurality of inlets for receiving a plurality of mediums including a first medium, a second medium, and a third medium and an outlet for delivering a conditioned flow of the second medium to one or more loads of the aircraft. A ram air circuit includes a ram air shell having at least one heat exchanger positioned therein. At least one compressing device is arranged in fluid communication with the ram air circuit and the outlet. The at least one compressing device includes at least one compressor and at least one turbine operably coupled via a shaft. A heat exchanger is arranged in fluid communication with the at least one compressing device. The second medium output from the at least one compressing device is cooled by the third medium. The second medium is fresh air.

Abstract: An environmental control system includes an inlet configured to receive a medium and a compressing device fluidly connected to the inlet. The compressing device includes a compressor operably coupled to a turbine, and an outlet of the compressor is fluidly connected to an inlet of the turbine such that the medium is provided to the compressor and the turbine in series. A first air-liquid heat exchanger is arranged in fluid communication with the outlet of the compressor and the inlet of the turbine, a first regeneration heat exchanger is fluidly connected to the outlet of the compressor and to an inlet of the first air-liquid heat exchanger, and a second regeneration heat exchanger is fluidly connected to an outlet of the first air-liquid heat exchanger and to the inlet of the turbine.

Abstract: An environmental control system of an aircraft includes a ram air circuit including a ram air shell having at least one heat exchanger positioned therein and a divider arranged within the ram air shell to separate the ram air shell into a first region and a second region. The at least one heat exchanger is arranged within both the first region and the second region. A first medium is configured to flow through the first region and a second, distinct medium is configured to flow through the second region. The environmental control system additionally includes a dehumidification system arranged in fluid communication with the ram air circuit and a compression device arranged in fluid communication with the ram air circuit and the dehumidification system.

Abstract: An environmental control system of an aircraft includes a plurality of inlets for receiving a plurality of mediums including a first medium, a second medium, and a third medium and an outlet for delivering a conditioned flow of the second medium to one or more loads of the aircraft. At least one compressing device is arranged in in fluid communication with the plurality of inlets and the outlet. The at least one compressing device includes a four-wheel compressing device having a compressor and at least one turbine operably coupled via a shaft. In a first mode of operation, the compressor is driven by the first medium, and in a second mode of operation, the compressor is driven by the third medium.

Abstract: An environmental control system of an aircraft includes a plurality of inlets for receiving a plurality of mediums including a first medium and a second medium and an outlet for delivering a conditioned flow of the second medium to one or more loads of the aircraft. A ram air circuit includes a ram air shell having at least one heat exchanger positioned therein. A compressing device is arranged in fluid communication with the ram air circuit and the outlet. The compressing device including a first compressor, a second compressor, and at least one turbine operably coupled via a shaft. The first compressor and the second compressor are arranged in parallel with respect to a flow of the second medium and the first medium is used as a heat sink by another component within the environmental control system.

Abstract: An environmental control system of a vehicle includes a compressor having a compressor inlet configured to receive a first medium and a compressor outlet. A compressed first medium is provided at the compressor outlet. A conduit is configured to receive a second medium and a heat exchanger is mounted to the compressor. The heat exchanger is fluidly connected to a portion of the compressor and to the conduit.

Abstract: A compressing device for use in an environmental control system includes at least one turbine configured to provide energy by expanding one or more medium. The one or more mediums provided at an outlet of the at least one turbine form a heat sink within the environmental control system. A compressor is configured to receive energy from the one or more mediums expanded across the at least one turbine. During a first mode of the compressing device, energy derived from a first medium of the one or more mediums is used to compress a second medium at the compressor and during a second mode of the compressing device, energy derived from both the first medium and a third medium of the one or more mediums is used to compress a second medium at the compressor.

Abstract: A method of operating an environmental control system of an aircraft includes providing a first medium to the environmental control system including a compressor and a turbine and extracting work from a second medium provided to a second turbine operably coupled to the compressor to drive the compressor. The first medium is provided to the compressor and the turbine sequentially. In a first mode of operation, the first medium to be provided to a downstream load is output from the turbine and in a second mode of operation, at least a portion of the first medium to be provided to the downstream load bypasses the turbine.

Abstract: An environmental control system includes a ram air circuit having a ram air duct and at least one ram heat exchanger arranged within the ram air duct, a compression device, and an expansion device. The compression device is configured to receive at least one of a first medium, a second medium, and a third medium. The environmental control system is operable in a plurality of modes including at least one normal mode and a failure mode. In the at least one normal mode, the first medium output from the compression device is exhausted into the ram air duct upstream from the at least one ram heat exchanger, and in the failure mode, only the third medium output from the compression device is exhausted into the ram air duct upstream from the at least one ram heat exchanger.

Abstract: An airplane is provided. The airplane includes an environmental control system coupled to an engine and an inlet. The engine provides a bleed. The inlet provides a fresh medium. The environmental control system includes a compressing device comprising a compressor and a turbine. The environmental control system also includes a moisture removal circuit that separately removes moisture from each of the first and second mediums prior to combining the first medium and the second medium to form mixed air.

Abstract: An environmental control system (ECS) of an aircraft includes an inlet for a first medium, an outlet for the first medium, an air cycle machine including a compressor, a turbine, and a shaft operably coupling the compressor and the turbine, and a plurality of heat exchangers arranged in fluid communication with the air cycle machine. A first heat exchanger of the plurality of heat exchangers is arranged directly downstream from the turbine and heat is transferred to the first medium within the first heat exchanger. A water extractor is arranged directly downstream from the first heat exchanger and a flow path connects the air cycle machine, the plurality of heat exchangers, and the water extractor with the inlet and the outlet.

Abstract: A method of operating an environmental control system of an aircraft includes providing a first medium to the environmental control system including a compressor and a turbine, wherein the first medium is provided to the compressor and the turbine sequentially and extracting work from a second medium provided to a power turbine operably coupled to the compressor to drive the compressor. In a first mode of operation, the first medium to be provided to a downstream load is output from the turbine, in a second mode of operation, at least a portion of the first medium to be provided to a downstream load bypasses the turbine, and in a third mode of operation, at least a portion of the first medium output from the compressor is provided to the power turbine.

Abstract: A dual entry turbine of a compression device includes a housing having a first inlet and a second inlet, and a first outlet and a second outlet. A turbine impeller is arranged within the housing. The turbine impeller has a first gas path and a second gas path. A first flow path extends from the first inlet to the first outlet via the first gas path and a second flow path extends from the second inlet to the second outlet via the second gas path. The first flow path and the second flow path being fluidly separate from one another.

Abstract: A method of operating an environmental control system of an aircraft includes providing a first medium to the environmental control system including a compressor and a turbine. The first medium is provided to the compressor and the turbine sequentially. A second medium is provided to the environmental control system. In a first mode of operation, the first medium and the second medium mix within the turbine and in a second mode of operation the second medium bypasses the turbine such that the first medium and the second medium mix downstream from the turbine.