The present disclosure relates to a fan apparatus (1). The fan apparatus (1) includes an impeller (12A, 12B, 12C, 26A, 26B) for generating a flow of air. A drive means (14) is provided for driving the impeller (12A, 12B, 12C, 26A, 26B). At least in certain embodiments, the drive means (4) includes a turbine (18) adapted to be rotated by a working liquid supplied to the fan apparatus (1). The fan apparatus (1) described herein is suitable for providing air ventilation and/or air extraction, for example.

A waste heat recovery system including a drive unit, the drive unit having a drive shaft, a compressor, the compressor operably coupled to the drive shaft, wherein operation of the drive unit drives the compressor, and a waste heat recovery cycle, the waste heat recovery cycle coupled to the drive unit and the compressor, wherein a waste heat of the drive unit powers the waste heat recovery cycle, such that the waste heat recovery cycle transmits a mechanical power to the compressor, is provided. Furthermore, an associated method is also provided.

A centrifugal compressor comprises: an impeller; an inlet pipe portion forming an intake passage to introduce air to the impeller; and a throttle mechanism capable of reducing a flow passage area of the intake passage upstream of the impeller. The throttle mechanism includes an annular portion configured to move between a first position and a second position upstream of the first position in an axial direction of the impeller. In a cross-section along a rotational axis of the impeller, an outer peripheral surface of the annular portion is formed to smoothly connect a leading edge and a trailing edge of the annular portion.

A turbocharger device includes a case having a turbine portion and a bearing portion connected to and extending from the turbine portion. The turbine portion defines a cavity that houses a turbine wheel and receives exhaust gas that rotates the turbine wheel. The bearing portion houses a shaft connected to the turbine wheel. The bearing portion has a radial thickness between an exterior surface and an interior surface. The interior surface defines a central channel. The bearing portion holds a bearing system that supports the shaft within the central channel. The bearing portion includes a lattice structure within the radial thickness. The lattice structure is a repeating three-dimensional array of frame segments connected to one another at junctions. The lattice structure engages a turbine back wall that is located between the turbine portion and the bearing portion. The lattice structure defines interstitial spaces between the frame segments.

A centrifugal compressor includes: an impeller; an inlet pipe portion forming an intake passage to introduce air to the impeller; and a throttle mechanism capable of reducing a flow passage area of the intake passage upstream of the impeller. The throttle mechanism includes an annular portion configured to move between a first position and a second position upstream of the first position in an axial direction of the impeller, and a strut supporting the annular portion. The strut extends toward at least one of an outer side in a radial direction of the impeller or a downstream side in the axial direction of the impeller with an increase in distance from the annular portion.

An exhaust turbocharger has a housing, in which a shaft is mounted by bearings, which carries a turbine wheel, on the one hand, and a compressor wheel, on the other hand. An electric machine has a rotor and a stator. The rotor is secured on the shaft for conjoint rotation therewith and the stator surrounds the rotor radially on the outside. A sleeve, which supports the rotor radially and axially, is arranged between the stator and the rotor. The sleeve has at least one fluid duct, by way of which a cooling fluid can be guided toward the bearings of the shaft.

A compressor wheel for a turbocharger includes a body having a top and a bottom, the body formed from a material comprising titanium, a central hub extending from the top to the bottom of the body of the compressor wheel, a central axis extending longitudinally through a center of the central hub of the compressor wheel, a central opening extending through the central hub of the compressor wheel, and a first set of vanes mounted to the body relative to the central axis such that each of the first set of vanes is off-axis relative to the central axis. Each of the first set of vanes having a top portion proximate a top of the central hub and extending downwardly along a curved path to a bottom portion proximate a bottom of the body. The compressor wheel further includes a second set of vanes mounted to the body having a top portion proximate a midpoint of the body and extending downwardly along a curved path to a bottom portion proximate the bottom of the body. The bottom of the body of the compressor wheel has a bottom surface extending radially inwardly and upwardly such that less of the material is present than if the bottom surface was flat.

Various methods and systems are provided for an electric turbocharger. In one example, the electric turbocharger includes an electric motor circumferentially surrounding a shaft, a turbine coupled to a first end of the shaft, and a compressor coupled to a second end of the shaft, opposite of the first end. The compressor may include a volute with a curved portion protruding towards the turbine.

A method for generating a gas-product includes: a) providing a first part of a feed stream; b) providing a second part of a feed stream; c) combining the first part of the feed stream with the second part of the feed stream into the feed stream; d) heating at least one of: the first part of the feed stream, the second part of the feed stream before step c, the feed stream after step c; e) conducting the feed stream into a reactor; f) reacting the feed stream into the gas-product. To reduce investment and in particular the footprint of the machine step d) is at least partly performed by compressing the respective stream by a supersonic compressor such that the respective stream is heated.

A centrifugal compressor includes: an impeller; an inlet pipe portion forming an intake passage to introduce air to the impeller; and a throttle mechanism capable of reducing a flow passage area of the intake passage upstream of the impeller. The throttle mechanism includes an annular portion configured to move between a first position and a second position upstream of the first position in an axial direction of the impeller, and a strut supporting the annular portion. The strut extends toward at least one of an outer side in a radial direction of the impeller or a downstream side in the axial direction of the impeller with an increase in distance from the annular portion.