Abstract:
The invention relates to an air supply system of an aircraft, in particular of a passenger aircraft, which comprises a fresh air system, through which fresh air can be supplied to an aircraft cabin, a circulating air system, which is coupled to the fresh air system and through which used cabin air can be supplied to the fresh air system, a cooling air system for cooling an air conditioning system of the aircraft disposed in the fresh air system, and a ventilation system coupled to the cooling air system for ventilating an installation space of the air conditioning system. The air supply system includes a device for fluidically coupling the cooling air system and the ventilation system. The device is disposed and configured inside the fuselage of the aircraft such that the air in one system can be driven through the air flow in the other system. The invention also relates to a method for mixing two air streams in an air supply system of this kind of an aircraft.
Abstract:
Système de conditionnement d'air pour une cabine pressurisée d'un aéronef, ledit système (1) comprenant un module de prélèvement d'air (3) configuré pour prélever de l'air ambiant extérieur à l'aéronef, un module de compression d'air (5) configuré pour comprimer le flux d'air prélevé (FI) et un module de refroidissement d'air (10) configuré pour refroidir le flux d'air comprimé (F2, F3) à partir d'un fluide cryogénique, le module de refroidissement (10) comprenant un condenseur (12) pour condenser l'eau du flux d'air, un extracteur d'eau (13) pour extraire ladite eau, un refroidisseur (14) pour refroidir le flux d'air sec issu de l'extracteur d'eau (13) et un réservoir (15) d'un fluide cryogénique par lequel l'eau du flux d'air est condensée dans le condenseur (12) et l'air sec issu de l'extracteur est refroidi dans le refroidisseur (14).
Abstract:
A turboprop-powered medium altitude long endurance aircraft, comprising: a gas turbine engine (8); heat scavenging apparatus (44), for example a thermal blanket comprising capillary tubing,arranged to scavenge heat from the gas turbine engine (8); and heating apparatus arranged to use the scavenged heat to provide heating to the aircraft. The heat scavenging apparatus (44) may be placed on an engine casing (14) and/or on or in an engine exhaust duct (16).The heating apparatus may comprise a circulation path (40) routed directly to a location in the aircraft where heating is to be performed, for example a leading edge of an engine support pylon (6) or a leading edge of an engine-carrying wing. The heating apparatus may comprise a heat exchanger (53 and/or 52).
Abstract:
The present invention relates to an air conditioning system (10) for an aircraft cabin (12) with at least one air inlet (14) for supplying air to the cabin (12), at least one air outlet (16) for discharging air from the cabin (12) and at least one compressed-air source (52, 54, 56), which is adapted to provide pressurised fresh air for supplying to the cabin (12) via the at least one air inlet (14). The air conditioning system (10) further comprises a heat exchanger (42) supplied with ram air from a ram air inlet (92) for cooling air from the compressed-air source (52, 54, 56), wherein the heat exchanger (42) is disposed upstream of the air inlet (14) of the cabin (12). It is intended that the air conditioning system (10) comprises a cabin air heat exchanger (100) which is designed to be supplied with air discharged from the cabin (12), wherein the cabin air heat exchanger (100) is disposed downstream of the at least one air outlet (16) and upstream of a point (N) at which fresh air is mixed with air from the cabin (12).
Abstract:
A two-spool air cycle machine (10) includes a high pressure cooling turbine section (12); a low pressure cooling turbine section (18); and first and second shafts (16, 22) that are concentrically arranged and that are independently rotatable with respect to one another. A turbine wheel (26) of the high pressure turbine section (12) is secured to the first shaft (16), and a turbine wheel (34) of the second turbine section (18) is secured to the second shaft (22). Such an air cycle machine (10) may be used in a variety of different aircraft environmental control systems.
Abstract:
A method and aircraft for providing bleed air to environmental control systems of an aircraft using a gas turbine engine, including determining a bleed air demand for the environmental control systems, supplying low pressure and high pressure bleed air to the environmental control systems, wherein the proportional supplying is controlled such that the conditioned air stream meets the determined bleed air demand.
Abstract:
A fluid pressure regulating system includes a turbomachine configured and adapted to pressurize fluid in a first mode and to depressurize fluid in a second mode. An energy exchange device is operatively connected to the turbomachine to provide power to drive the turbomachine in the first mode to pressurize fluid, and to be driven by the turbomachine in the second mode to receive power from depressurization of fluid. The turbomachine and energy exchange device are configured and adapted to selectively switch between the first and second modes to output fluid at a substantially constant pressure using fluid supplied at pressures that vary ranging from above and below the substantially constant pressure.
Abstract:
A cooling system includes a heat exchanger (210) through which a refrigerant flows, and which rejects heat to a fluid, an evaporator (208), a first circuit having an expansion device (214), a second circuit having an expansion machine (202) coupled to a compressor (204), and a set of valves (218) arranged to direct the refrigerant through the first circuit, the second circuit, or both the first and second circuits based on ambient conditions.
Abstract:
L'invention vise une récupération optimisée d'énergie d'un aéronef, en altitude mais également au sol, à l'aide d'une même architecture. A cette fin, l'invention prévoit de récupérer l'énergie thermique à l'échappement. Une architecture de récupération d'énergie comporte un groupe auxiliaire de puissance APU (20) équipé d'une tuyère d'échappement (14) et d'un générateur de gaz (2a) équipé d'un arbre (21) de transmission de puissance à un compresseur de charge (22). Ce compresseur fournit, via une veine d'alimentation(C1), de l'air comprimé au système de conditionnement d'air ECS (30) de la cabine passagers(40). De plus, un turbocompresseur de récupération (10) est accouplé directement, ou via une boite de transmission, à l'arbre (21) du groupe APU (20). Ce turbocompresseur (10) comporte une turbine de récupération (11) alimentée par une branche aval (C3b) d'un conduit (C3) monté sur un échangeur thermique (1) équipant la tuyère (14). Ce conduit (C3) présente une branche amont (C3a) couplée à des canaux (41, 42) reliant les sorties d'air de la cabine (40) et du compresseur (12). Un deuxième échangeur (2) peut être monté entre la veine d'alimentation(C1) et le canal de sortie cabine (41).
Abstract:
An air cycle machine for extracting bleed air from a gas turbine engine of an aircraft is provided. The air cycle machine extracts a stream of low pressure bleed air and a stream of high pressure bleed air from a compressor section of the gas turbine engine. The air cycle machine includes a compressor that receives the stream of low pressure bleed air and a turbine that receives the stream of high pressure bleed air. The stream of high pressure bleed air is expanded as it drives the turbine, and the stream of low pressure bleed air is compressed by the compressor. The resulting streams of bleed air are substantially the same pressure, such that they may be merged using a junction into a combined bleed air stream having a temperature and pressure suitable for use by a variety of aircraft accessory systems, such as an environmental control system. The air cycle machine may further power or be powered from an electrical storage device or generator on the fan.