EP3423354A1 - Système comprenant un groupe de conditionnement d'air hybride pour cabine d'aéronef - Google Patents
Système comprenant un groupe de conditionnement d'air hybride pour cabine d'aéronefInfo
- Publication number
- EP3423354A1 EP3423354A1 EP17711709.0A EP17711709A EP3423354A1 EP 3423354 A1 EP3423354 A1 EP 3423354A1 EP 17711709 A EP17711709 A EP 17711709A EP 3423354 A1 EP3423354 A1 EP 3423354A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- conditioning unit
- air conditioning
- aircraft
- electric motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004378 air conditioning Methods 0.000 title claims abstract description 76
- 238000005259 measurement Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 230000009194 climbing Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 description 6
- 238000003809 water extraction Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
- B64D2013/0603—Environmental Control Systems
- B64D2013/0618—Environmental Control Systems with arrangements for reducing or managing bleed air, using another air source, e.g. ram air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
- B64D2013/0603—Environmental Control Systems
- B64D2013/0644—Environmental Control Systems including electric motors or generators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/50—On board measures aiming to increase energy efficiency
Definitions
- the present invention relates generally to a system comprising an air conditioning unit for a cabin of an aircraft.
- the invention finds applications, in particular, in aircraft whose air intake is essentially sized for supplying the cabin air conditioning unit.
- the air conditioning unit has several functions, namely, to deliver a certain fresh air flow to the pressurized zone to ensure a sufficient oxygen turnover rate for cabin occupants and a sufficient amount of air for the cabin occupant. Pressurizing system, dry the air sent to the pressurized zone and also provide air conditioning and heating functions.
- the air conditioning unit uses as power source the air intake on the engines of the aircraft through two sampling ports, namely, the IP sampling port (in English, Intermediate Pressure) to an intermediate pressure and the HP port (in English, High Pressure) at a higher pressure.
- the air sampled via the IP and HP ports is known in English as "bleed air”.
- the IP port is used when the engine speed of the aircraft is high, for example during the rise and cruise phases while the HP port is used when the engine speed of the aircraft is low, for example, in the taxiing, descent and waiting phases.
- some known aircraft such as the B787 propose the use of an air conditioning unit based on a source of electrical energy instead of air sampling on the engines.
- electrical energy is used to supply motor compressors that themselves supply the air conditioning unit.
- this type of architecture requires the use of large motor compressors arranged upstream of the air conditioning unit, which causes significant power consumption.
- the power electronics of an electric air conditioning unit requires liquid loop cooling. This type of cooling is known to be heavy, complex and unreliable. This solution is therefore not satisfactory.
- D1 In another hybrid approach that seems to have not yet put into production, the document US 2013/0040545 A1 (hereinafter D1) plans to use only the IP port to supply the air conditioning unit.
- D1 has identified that in flight phases where the engine speed of the aircraft is low, the pressure of the air drawn on the IP port is not sufficient to properly operate the air conditioning unit.
- D1 proposes to use an auxiliary compressor arranged upstream of the air conditioning unit and which is powered by an electric motor.
- the auxiliary compressor is activated to compress the air taken from the IP port in order to obtain air at a required pressure and then injected into the air conditioning unit.
- the object of the present invention is to propose a system having a new architecture comprising an air conditioning unit that can operate solely on the basis of a single air intake port without, however, requiring the addition of an auxiliary compressor for ensure the operation of the air conditioning unit during flight phases where the engine speed of the aircraft is low.
- the invention proposes a system comprising an air conditioning unit for a cabin of an aircraft, the air conditioning unit of which comprises an air cycle machine (ACM).
- the ACM of the air conditioning unit comprises at least one expansion turbine and a compressor, the turbine being mechanically coupled to the compressor via a first rotary shaft so as to drive the compressor.
- the system is characterized by:
- a single port designed to take air on at least one of the engines of the aircraft so as to supply an inlet of the air conditioning unit, the air taken from having at least one fluidic characteristic making it suitable supplying the air conditioning unit when the aircraft is in the climbing or cruising phase;
- At least one measuring sensor designed to measure the fluidic characteristic of the air entering the inlet of the air conditioning unit
- the ACM further comprising a first electric motor coupled to the first shaft;
- the control unit coupled to the measurement sensor and to the first electric motor, the control unit being configured to control the operation of the first electric motor, when the measurement of the fluidic characteristic is lower than a predetermined threshold, so that the rotation of the first shaft is accelerated so that the air output of the compressor has a fluidic characteristic making it able to feed the cabin when the aircraft is in flight phase taxiing, descent or waiting.
- the first electric motor has an electric power of less than 30 kW, for example between 10 and 20 kW.
- the fluidic characteristic of the air is chosen from: a pressure and a flow rate.
- the predetermined threshold is of the order of 18 psia or 0.30 kg / s when, respectively, the fluidic characteristic is a pressure or a flow rate.
- the system may further comprise a fan disposed on a second rotary shaft disjoint from the first rotary shaft.
- the second rotary shaft is provided to be driven by a second electric motor disposed on the second shaft and configured to supply the fan.
- the second electric motor has an electric power greater than 3 kW, for example between 4 and 5 kW.
- the second rotary shaft is provided to be driven by a second turbine mechanically coupled to the fan via the second shaft so as to drive the fan.
- the second turbine is pneumatically coupled to the compressor inlet.
- the second turbine is pneumatically coupled to the inlet of the air conditioning unit.
- FIG. 2 is a functional diagram showing an improvement of the system of FIG. 1, according to a first embodiment
- - Figure 3 is a functional diagram showing an improvement of the system of Figure 1, according to a second embodiment
- the invention proposes to use an electric motor coupled to the rotary shaft of the ACM so that the rotation of the ACM shaft is accelerated during phases of flight where the engine speed of the The aircraft is weak when a pressure or flow rate of air entering the air conditioning unit is below a predetermined threshold.
- the compressor can increase the compression rate of the air treated by the ACM when the pressure or the flow of the incoming air is not sufficient to supply the air conditioning unit.
- the system proposed appears less complex and lighter than the system of the prior art, because a cooling of the power electronics by air is possible and a single compressor is used instead of two.
- turboprop type aircraft such as a regional transport aircraft.
- this choice is only illustrative and the invention can be applied to other types of aircraft having the characteristics of air sampling as described above, in the phases of flight where the engine speed is low.
- FIG. 1 illustrates the general structure of an embodiment of a system according to the invention, comprising an air conditioning unit (hereinafter air conditioning unit) 100.
- the system according to the invention comprises a single port (not shown) for taking air on at least one of the engines of the aircraft.
- the air conditioning unit 100 includes an inlet 110 which is configured to be powered by air drawn from the single port of the system.
- the air conditioning unit 100 then comprises a flow control valve FCV 130 which is configured to regulate the flow rate of the air entering the inlet 1 10.
- FCV 130 which is configured to regulate the flow rate of the air entering the inlet 1 10.
- the withdrawn air is directed to a heat exchanger 130 which comprises a primary heat exchanger (PHX 131) and a main heat exchanger (MHX 132.) heat exchanger 130 also includes an outside air circulation circuit (in English, "ram air") 133 extending between an inlet 1331 and an outside air outlet 1332.
- the air received at the inlet 1 10 which passes through the heat exchanger 130 is cooled by the absorption of its heat by the air circulation circuit 133.
- a fan 141 is used to ventilate the heat exchanger 130, the fan 141 being disposed downstream of the heat exchanger 130. 1332.
- pneumatic energy is supplied by a small turbine engine, forming an Auxiliary Power Unit (APU 170).
- the heat exchanger PHX 131 is configured to cool the air regulated by the valve FCV 120.
- a compressor 142 coupled to the heat exchanger PHX 131 and the heat exchanger MHX 132
- the compressor 142 is configured to compress the air cooled by the PHX heat exchanger while the heat exchanger MHX 132 is configured to cool the compressed air by the compressor 142.
- This air cooled by the heat exchanger MHX 132 is then injected into a water extraction device 150 which is configured to dehydrate the air.
- the water extraction device 150 generally comprises a condenser (not shown) and a water separator (not shown) mounted downstream of the condenser.
- the condenser is configured to cool the cooled air by the MHX heat exchanger 132.
- a turbine 143 coupled to the water extraction device 150, is provided to vent the dehydrated air by the water extraction device 150.
- the turbine 143 is also configured to direct the relaxed air in heat exchange through the condenser of the water extraction device 150 for cooling the compressed air by the compressor 142 to the temperature required for the separation of water in the water extraction device 150.
- the Expelled air is directed out of the air conditioning unit 100 to be mixed in a mixing chamber (not shown) in the form of fresh air to recirculate air from the cabin of the aircraft.
- the turbine 143, the compressor 142 and the fan 141 are disposed on a rotary common shaft 144 and form an air cycle machine (in English, "Air cycle Machine").
- ACM 140 also referred to as a three-wheel machine.
- the air conditioning unit 100 of Figure 1 further comprises an electric motor 145 disposed in the ACM 140 and coupled to the rotary shaft 144.
- the electric motor 145 is a permanent magnet synchronous motor.
- the electric motor 145 has an electric power of less than 30 kW, where appropriate between 10 and 20 kW.
- the air conditioning unit 100 of FIG. 1 also comprises a measurement sensor 160 disposed at the inlet 1 10 and configured to measure a fluidic characteristic of the air entering the inlet 1 10.
- the fluidic characteristic of the received air is chosen from an air pressure and an air flow rate. In the remainder of the description, it will be considered by way of example that the fluidic characteristic measured by the measurement sensor 160 is an air pressure.
- the control unit 146 is configured to control the start-up of the electric motor 145, when a measurement of the fluidic characteristic is lower than a predetermined threshold, so that the rotation of the rotary shaft 144 is accelerated so that the air at the outlet of the compressor or at the outlet of the turbine has a fluidic characteristic on the making it possible to feed the cabin when the airplane is in the taxi phase of taxiing, descent or waiting.
- the fluidic characteristic is a pressure at the outlet of the compressor or a flow rate at the outlet of the turbine.
- the control unit 146 may be cooled by cabin outlet air 10.
- the electric motor 145 is not started and the compressor 142 is only energized. mechanical mechanism via the rotary shaft 144 driven by the turbine 143.
- the predetermined value is of the order of 18 psia when the fluidic characteristic is an air pressure.
- the predetermined value is of the order of 0.30 kg / s.
- the control unit 146 controls the starting of the electric motor 145 to accelerate the rotation of the the rotary shaft 144 so that the air output of the compressor 142 has a pressure making it able to provide the right level of flow in the cabin when the aircraft is in the rolling phase, descent or waiting.
- the actuation of the electric motor 145 has the effect that the air at the outlet of the compressor 142 has an air pressure that corresponds to that which it would have had if the air pressure at the level of the input 1 10 was sufficient to power the air conditioning unit 100 without the need to start the electric motor 145.
- the predetermined value is of the order of 18 psia. at the level of the input 1 10.
- the effect of the start of the electric motor 145 would have the effect that the pressure measurement at the input 1 10 is the same. order of 23 psia.
- an air pressure of 23 psia at the inlet 1 10 is sufficient to supply the group 100 without requiring the start of the electric motor 145, when the aircraft is in the rolling phase, descent or waiting.
- the effect of starting the electric motor 145 will have the effect that the measurement of flow rate at the input 1 10 is of the order of 0.30 kg / s while without the start of the electric motor 145, the flow measurement at the input 1 10 would be of the order of 0.20 kg / s.
- the new architecture of the system according to the invention thus relates to a hybrid configuration of the air conditioning unit 100 insofar as the compressor 142 can be powered by a source of pneumatic energy generated by the turbine 143 or by the source of pneumatic energy combined with a source of electrical energy generated by the electric motor 145.
- Figure 2 illustrates an improvement of the system of Figure 1, comprising an air conditioning unit 200, according to a first embodiment.
- the air conditioning unit 200 the same elements are designated by references similar to those of the air conditioning unit 100.
- the fan 241 is not disposed on the rotary shaft 244 of the motorized turbocharger (242, 243, 245). In the particular embodiment of Figure 2, the fan 241 is disposed on another rotating shaft 247 disjoint from the rotary shaft 244 of the motorized turbocharger (242, 243, 245). Thus, in Figure 2, the fan 241 is no longer part of the ACM 240.
- the rotary shaft 247 is configured to be driven by an electric motor 248 disposed on the rotary shaft 247 and which is configured to supply the fan 241.
- the electric motor 248 is a permanent magnet synchronous motor.
- the electric motor 248 has an electric power greater than 3 kW, where applicable between 4 and 5 kW.
- the control unit 246 as described above is also used to control the electric motor 248 of the fan 241. In this case, it is possible to use a known switching device, such as a switch for the control unit 246 to control the electric motor 245 when the air conditioning unit 200 needs it or only the electric motor 248 of the fan 241. when the ACM 240 does not need it, as mentioned above.
- the air conditioning unit 200 also comprises a conventional arrangement with a non-return valve 249 disposed in the air-conditioning circuit.
- outside air recirculation 233 which allows either the use of the dynamic outside air in flight, or the use of the fan 241 on the ground, to cool the heat exchanger 230.
- the architecture of the system of FIG. 2 thus presents an electric fan (241, 248) no longer part of the ACM 240 and therefore no longer being powered mechanically via the common shaft 244 of the ACM 240 as it does.
- the electric fan (241, 248) of Figure 2 is adapted to circulate air at a temperature of about 150 ° C. This distinguishes it from electric recirculating or cabin extracting fans which have a lower power ranging from 1 to 5 kW and can not circulate air at a temperature of less than 70 ° C.
- FIG. 2 illustrates an improvement of the system of Figure 1, comprising an air conditioning unit 300, according to a second embodiment.
- the air conditioning unit 300 the same elements are designated by references similar to those of the air conditioning unit 100.
- the fan 341 is not disposed on the rotary shaft 344 of the motorized turbocharger (342, 343, 345).
- the fan 344 is also disposed on another rotating shaft 347 disjoint from the rotational shaft 344 of the motorized turbocharger (342, 343, 345).
- the fan 341 is no longer part of the ACM 340.
- the rotary shaft 347 is configured to be driven by a second turbine 390 mechanically coupled to the fan 341 via the rotary shaft 347 to drive the fan 341.
- the turbine 390 is pneumatically coupled to the input 1 10.
- the turbine 390 is pneumatically coupled to the inlet of the compressor 340.
- the architecture of FIG. 3 therefore has a turbofan (341, 390) that is not part of the ACM 340 and is therefore no longer fed mechanically by the common shaft 344 of the ACM 340.
- FIGS. 2 and 3 have the advantage of being particularly suitable in cases where the dynamics of the rotary shaft (244, 344) would not allow integration on a single common shaft. , a turbine wheel, an electric motor, a compressor wheel and a fan wheel.
- this possible tree dynamics problem can be overcome.
- This solution also has the advantage of allowing the operation of the fan at its optimum speed and therefore to improve its efficiency.
- the present invention makes it possible to propose a system comprising an air conditioning unit which relies on the withdrawal of air from a single sampling port without, however, requiring the addition of an auxiliary compressor to ensure the operation of the air conditioning unit during flight phases where the engine speed of the aircraft is low, as is the case in the known prior art.
- This particular arrangement makes it possible to envisage reducing or even eliminating the pre-cooler of the airplane (in English, precooler), whose function is to ensure the cooling of the air taken before sending it, in particular to the air conditioning unit and / or the wing de-icing system. Reducing the pre-cooler is particularly beneficial for planes flying at more than 25,000 feet, as it will no longer be necessary to cool the air taken from the HP port.
- Another advantage of the invention lies in the cooling of the control unit (146, 246, 346) which can be achieved by the cabin exhaust air 10.
- the control unit 146, 246, 3466
- the power electronics used does not cause an electrical consumption comparable to that which is generated by the all-electric air conditioning unit.
- the system comprising the air conditioning unit (100, 200, 300) as described above can in particular, find applications on all ranges of regional aviation such as turboprops or aircraft using a defrost fully electric wing that does not require air sampling on the compression stages of the aircraft engines.
- the present invention is not limited to the preferred embodiment and embodiments described above by way of non-limiting examples. It also relates to the variants within the scope of those skilled in the art within the scope of the claims below. For example, it is also to use the invention in a plane several groups of air conditioners.
- all power and flow values provided in the description as well as in the claims are valid for a hundred-passenger airplane. However, it is contemplated that those skilled in the art will be able to extrapolate these values for other capabilities of the number of passengers of a particular aircraft.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1651651A FR3048231B1 (fr) | 2016-02-29 | 2016-02-29 | Systeme comprenant un groupe de conditionnement d'air hybride pour cabine d'aeronef |
PCT/FR2017/050420 WO2017149228A1 (fr) | 2016-02-29 | 2017-02-24 | Système comprenant un groupe de conditionnement d'air hybride pour cabine d'aéronef |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3423354A1 true EP3423354A1 (fr) | 2019-01-09 |
Family
ID=55752608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17711709.0A Withdrawn EP3423354A1 (fr) | 2016-02-29 | 2017-02-24 | Système comprenant un groupe de conditionnement d'air hybride pour cabine d'aéronef |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3423354A1 (fr) |
FR (1) | FR3048231B1 (fr) |
WO (1) | WO2017149228A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11486472B2 (en) | 2020-04-16 | 2022-11-01 | United Technologies Advanced Projects Inc. | Gear sytems with variable speed drive |
US11535392B2 (en) | 2019-03-18 | 2022-12-27 | Pratt & Whitney Canada Corp. | Architectures for hybrid-electric propulsion |
US11628942B2 (en) | 2019-03-01 | 2023-04-18 | Pratt & Whitney Canada Corp. | Torque ripple control for an aircraft power train |
US11697505B2 (en) | 2019-03-01 | 2023-07-11 | Pratt & Whitney Canada Corp. | Distributed propulsion configurations for aircraft having mixed drive systems |
US11732639B2 (en) | 2019-03-01 | 2023-08-22 | Pratt & Whitney Canada Corp. | Mechanical disconnects for parallel power lanes in hybrid electric propulsion systems |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220348335A1 (en) * | 2021-04-29 | 2022-11-03 | Hamilton Sundstrand Corporation | All electric ecs with cabin outflow cooled motor drives |
EP4420982A1 (fr) * | 2023-02-24 | 2024-08-28 | Honeywell International Inc. | Système de contrôle environnemental |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US40545A (en) | 1863-11-10 | Joseph h | ||
US4261416A (en) * | 1979-02-23 | 1981-04-14 | The Boeing Company | Multimode cabin air conditioning system |
US6058715A (en) * | 1997-12-09 | 2000-05-09 | Alliedsignal Inc. | Environmental control system including air cycle machine and electrical machine |
US5939800A (en) * | 1998-02-11 | 1999-08-17 | Alliedsignal Inc. | Aircraft electrical power system including air conditioning system generator |
US6427471B1 (en) * | 2000-02-29 | 2002-08-06 | Shimadzu Corporation | Air cycle machine and air conditioning system using the same |
GB0118292D0 (en) * | 2001-07-27 | 2001-09-19 | Honeywell Normalair Garrett | Air cycle cooling system |
US7121100B2 (en) * | 2003-09-09 | 2006-10-17 | The Boeing Company | High efficiency aircraft cabin air supply cooling system |
US7970497B2 (en) * | 2007-03-02 | 2011-06-28 | Honeywell International Inc. | Smart hybrid electric and bleed architecture |
US8209066B2 (en) * | 2010-02-11 | 2012-06-26 | Bae Systems Information And Electronic Systems Integration Inc. | Environmental control system for precision airborne payloads |
US9016075B1 (en) * | 2012-01-04 | 2015-04-28 | The Boeing Company | Aircraft environmental control system and method |
US9656756B2 (en) * | 2014-03-10 | 2017-05-23 | The Boeing Company | Turbo-compressor system and method for extracting energy from an aircraft engine |
-
2016
- 2016-02-29 FR FR1651651A patent/FR3048231B1/fr active Active
-
2017
- 2017-02-24 WO PCT/FR2017/050420 patent/WO2017149228A1/fr active Application Filing
- 2017-02-24 EP EP17711709.0A patent/EP3423354A1/fr not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11628942B2 (en) | 2019-03-01 | 2023-04-18 | Pratt & Whitney Canada Corp. | Torque ripple control for an aircraft power train |
US11697505B2 (en) | 2019-03-01 | 2023-07-11 | Pratt & Whitney Canada Corp. | Distributed propulsion configurations for aircraft having mixed drive systems |
US11732639B2 (en) | 2019-03-01 | 2023-08-22 | Pratt & Whitney Canada Corp. | Mechanical disconnects for parallel power lanes in hybrid electric propulsion systems |
US11535392B2 (en) | 2019-03-18 | 2022-12-27 | Pratt & Whitney Canada Corp. | Architectures for hybrid-electric propulsion |
US12071256B2 (en) | 2019-03-18 | 2024-08-27 | Pratt & Whitney Canada Corp. | Architectures for hybrid-electric propulsion |
US11486472B2 (en) | 2020-04-16 | 2022-11-01 | United Technologies Advanced Projects Inc. | Gear sytems with variable speed drive |
US12066083B2 (en) | 2020-04-16 | 2024-08-20 | Pratt & Whitney Canada Corp. | Gear systems with variable speed drive |
Also Published As
Publication number | Publication date |
---|---|
FR3048231A1 (fr) | 2017-09-01 |
WO2017149228A1 (fr) | 2017-09-08 |
FR3048231B1 (fr) | 2019-07-05 |
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