# US 11,994,088 B2 · Ambient air environmental control system

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- Number: US 11,994,088 B2
- Document ID: US11994088B2
- Status: Granted
- Kind: B2
- Application number: 17/492,008
- Filed: 2021-10-01
- Published: 2023-04-06
- Granted: 2024-05-28
- Earliest claimed: 2021-10-01
- Assignees: Hamilton Sundstrand Corporation
- Applicants: Hamilton Sundstrand Corporation
- Inventors: Louis J. Bruno; Darryl A. Colson; Tony Ho; Donald E. Army
- Web page: https://patentgrep.com/patent/US11994088B2

## CPC

- F01D 5/048: {Form or construction}
- F02K 3/02: in which part of the working fluid by-passes the turbine and combustion chamber
- B64D 13/06: the air being conditioned (pressurising B64D13/02)
- F02B 29/0475: {the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location}
- F02B 37/025: {Multiple scrolls or multiple gas passages guiding the gas to the pump drive}
- F02C 9/18: by bleeding, bypassing or acting on variable working fluid interconnections between turbines or compressors or their stages {(F02C3/113 takes precedence)}
- B64D 2013/0618: {with arrangements for reducing or managing bleed air, using another air source, e.g. ram air}
- B64D 2013/064: {comprising more than one system, e.g. dual systems}
- B64D 2013/0644: {including electric motors or generators}
- B64D 2013/0648: {with energy recovery means, e.g. using turbines}
- F01D 5/022: {with concentric rows of axial blades}
- F01D 9/048: {for radial admission}
- F05D 2220/323: for aircraft propulsion, e.g. jet engines
- F05D 2220/40: in turbochargers
- F05D 2220/62: with energy recovery turbines
- Y02T 50/50: On board measures aiming to increase energy efficiency
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00)
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## 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.

## Claims

### Claim 1

An environmental control system comprising:
a compression device including a compressor and a turbine operably coupled by a shaft, the compressor being configured to receive a first medium and the turbine being operable to receive the first medium and a second medium;
wherein the turbine has a first flow path configured to receive the first medium and second flow path configured to receive the second medium such that the first medium and the second medium are fluidly separate at an outlet of the turbine,
wherein the first flow path is arranged outside the second flow path, the first medium is bleed air and the second medium is fresh air.

### Claim 2 (depends on 1)

The environmental control system of claim 1, wherein the outlet of the turbine includes a first outlet associated with the first flow path and a second outlet associated with the second flow path, the first outlet being fluidly coupled to a first component of the environmental control system and the second outlet being fluidly coupled to a second component of the environmental control system.

### Claim 3 (depends on 2)

The environmental control system of claim 2, further comprising:
a ram air circuit having at least one heat exchanger;
wherein the first outlet is fluidly connected to a system outlet, and the second outlet is fluidly connected to the ram air circuit.

### Claim 4 (depends on 3)

The environmental control system of claim 3, further comprising a fan operably coupled to the shaft, the fan being arranged in fluid communication with a portion of the ram air circuit.

### Claim 5 (depends on 1)

The environmental control system of claim 1, wherein the environmental control system is operable in a first mode and a second mode, in the first mode, energy is extracted from both the first medium and the second medium within the turbine, and in the second mode, energy is extracted from only the second medium in the turbine.