A duct is provided and includes a tubular member having an inlet portion, an outlet portion and a central portion interposed between the inlet and outlet portions and a tributary tubular member fluidly coupled to the tubular member at the central portion. The tributary tubular member includes first and second torus sectors defining first and second apertures, respectively, through which an upstream end of the central portion extends. The second torus sector is disposed within the first torus sector to define a sectioned toroidal annulus about the first and second apertures and between an exterior surface of the second torus sector and an interior surface of the first torus sector.

The present disclosure relates to an electronic control unit for a motor vehicle, having a first electronic control device, in particular a first equipped circuit board. The electronic control unit additionally has a gas cooling duct for conducting a compressed gas. The gas cooling duct is connected in a thermally conductive fashion to the first electronic control device, and is designed to separate the compressed gas from the first electronic control device. The gas cooling duct has an expansion section in which a flow cross section of the gas cooling duct widens in order to expand and cool the compressed gas in order to cool the first electronic control device.

A system is provided. The system includes at least two heat exchangers that are alternatively cooled by an outlet medium. The system also includes a cooling circuit that provides a cooling medium to the at least two heat exchangers. The cooling circuit provides the cooling medium to a first heat exchanger of the at least two heat exchangers in accordance with a first mode. The cooling circuit provide the cooling medium to a second heat exchanger of the at least two heat exchangers in accordance with a second mode.

Materials, components, and methods consistent with the present invention are directed to the fabrication and use of micro-scale channels with a fluid, where the temperature and flow of the fluid is controlled through the geometry of the micro-scale channel and the configuration of at least a portion of the wall of the micro-scale channel and the constituent particles that make up the fluid. Moreover, the wall of the micro-scale channel and the constituent particles are configured such that collisions between the constituent particles and the wall are substantially specular.

A device for controlling the temperature of a medium, comprising: a first circuit in which a first heating medium circulates without phase transitions; a second circuit in which a second gaseous heating medium circulates without phase transitions; a first heat converter arranged in the first circuit and in which the first medium exchanges heat with a surrounding medium: a second heat converter arranged in the first circuit and in which the first medium exchanges heat with the medium to be temperature-controlled; a first delivery means arranged in the first circuit for moving the first medium; a compressor arranged in the second circuit for compressing the second medium; a third heat converter arranged behind the compressor when seen in the flow direction so as to contact the second circuit and which exchanges heat with the first medium; and means for cooling or expanding the first medium.

Materials, components, and methods consistent with the disclosure are directed to the fabrication and use of micro scale channels with a gas, where the micro channel can include a base (110) and a side (120), where the base and the side can be configured to form at least a portion of an inflow opening, and an outflow opening. The micro channel can be configured to accommodate a flow of the gas from the inflow opening to the outflow opening in a first direction substantially perpendicular to a cross section of the micro channel. The side can have a thickness in a range 0.5 m and 500 m, where the micro channel with a thickness in a range 0.5 m and 500 m is formed, in part, by providing the side on the base.

An environmental control system for an aircraft is provided. The environmental control system comprises a bleed air system. Also included is a ram air system. Further included is an air pressure and temperature conditioning system, wherein bleed air and ram air are mixed to satisfy a cabin fresh air requirement. The air pressure and temperature conditioning system includes a compressor that pressurizes ram air. The air pressure and temperature conditioning system also includes a power turbine that expands bleed air, the pressurized ram air and expanded bleed air at identical pressures prior to mixing downstream of the compressor and the power turbine.

A refrigerant processing device includes a main body, and a pipe and a narrow tube that feed a refrigerant into and out of the main body. The main body has a cylindrical body part, and upper and lower end wall parts that close both ends of the cylindrical body part. The pipe passes through the lower end wall part, and extends along a central axis of the cylindrical body part. The narrow tube passes through the upper end wall part. A first spiral groove extending in a spiral shape with respect to the central axis is formed on an inner circumferential surface of the cylindrical body part. A second spiral groove extending in a spiral shape with respect to the central axis and a linear groove extending in a direction of the central axis are formed on an outer circumferential surface of the pipe.

An air cycle machine includes a shaft rotatable about a shaft axis, a compressor section and a turbine section operably coupled to the compressor section. The compressor section includes a compressor housing and a compressor rotor connected to the shaft and the turbine section includes a turbine housing and a turbine rotor mounted to the shaft. At least one heat exchanger is positioned within one of the compressor housing and the turbine housing.

An aircraft air conditioning system comprising an ambient air line, for ambient air to flow through, connected to supply ambient air to a mixer of the aircraft air conditioning system. An ambient air compressor is arranged in the ambient air line for compressing the ambient air flowing there through. A refrigerating apparatus comprises a refrigerant circuit for a refrigerant to flow through, including a refrigerant compressor arranged in the refrigerant circuit. The refrigerant circuit is coupled thermally to the ambient air line to transfer heat from the ambient air to the refrigerant before the ambient air is supplied to the mixer. A cabin exhaust air turbine is connected to a cabin exhaust air line, is coupled to the ambient air compressor arranged in the ambient air line, and is configured to expand the cabin exhaust air flowing through the cabin exhaust air line and to drive the ambient air compressor.