A plate heat exchanger and a method of manufacturing a plate heat exchanger are disclosed. The plate heat exchanger comprises plurality of plates, each comprising a central area with a corrugation of ridges and valleys extending between an upper level and a lower level. Each of four porthole areas comprises an annular flat area located at the upper or lower level. The plates comprise heat exchanger plates and an end plate. Each heat exchanger plate comprises four portholes through the respective porthole area. Each porthole area of the end plate is closed by a plate portion. A number of protrusions project from the annular flat area of the end plate to one of the lower level and the upper level. The protrusions, that project to the upper level, abut the annular flat area of the adjoining heat exchanger plate.

In a heat exchanger with double-walled tubes, an end junction between inner tube and outer tube comprises an end plate in which there is a seat in which an end portion of the inner tube is housed. The corresponding outer tube is peripherally fixed sealingly around the opening of the seat and a deflector extends the inner wall of the outer tube inside the seat so as to define a toroidal cavity between the deflector and a side wall of the seat. The seat is closed by a bottom which is opposite to the opening of the seat and which has a passage connected sealingly to the end of the inner tube in the seat for the transit of the fluid to be cooled. A radial space is present near the said bottom between the toroidal cavity and internal cavity of the double-walled tube, and the end plate has at least one conduit which emerges inside the toroidal cavity for the inflow or outflow of the cooling fluid. In this way a junction and an exchanger with such a junction which are robust and have innovative performance features may be provided.

A support and connection device is for an operating group of a vehicle. The support and connection device is configured for supporting and for fluidic connection with an operating device in turn included in the operating group. The support and connection device identifies a vertical axis and two longitudinal axes and includes at least one plate-shaped unit in which, in the vertical direction, there is at least one mouth for the passage of a working fluid. The plate-shaped unit includes an upper laminar element, a lower laminar element reciprocally stacked along the vertical axis and a hollow space between them. The at least one mouth for fluid passage is defined laterally by a fluid mouth wall constituted by the reciprocal engagement of an upper mouth rim included in the upper laminar element and by a lower mouth rim included in the lower laminar element.

A heat exchanger includes tube expansion portions provided respectively on a plurality of heat transfer tubes such that outer peripheral surfaces of the heat transfer tubes are respectively pressed against inner peripheral surfaces of a plurality of first holes provided in a side wall portion of a case, and a plurality of first concave surface portions provided in an outer surface of the tube expansion portion so that first gaps, into which brazing material of a first brazed portion advances, are formed between the outer surface of the tube expansion portion and the inner peripheral surface of the first hole. At least one of the plurality of first concave surface portions is positioned in an outside peripheral surface portion of the outer peripheral surface of the heat transfer tube. According to this configuration, the strength with which the heat transfer tubes are attached to the case can be increased while simplifying a manufacturing operation and reducing the manufacturing cost.

A shell and tube heat exchanger includes a tube bundle for passage of a first medium from a first inlet to a first outlet. A second medium flows through a flow space which surrounds the tube bundle. The tube bundle includes first tubes communicating with the first inlet, and second tubes communicating with the first outlet and fluidly connected to the first tubes. The first tubes define an outer enveloping surface which is predominantly adjacent to an enveloping surface of the second tubes. A separating body between the first inlet and a tubesheet which separates the flow space from the first medium prevents the first medium from flowing against the tubesheet and includes inlet tubes which bridge a compensation space between the separating body and the tubesheet and which protrude into the first tubes to direct the first medium into the first tubes while bypassing the tubesheet.

A core body includes a structure having a plurality of connected unit cells. At least one unit cell has one or more sidewalls that are curved and define a portion of an inner passageway within and through the unit cell. The one or more sidewalls define multiple orifices and include a cone disposed between at least some of the orifices. A dimple is defined along an outer surface of the unit cell at the cone. The outer surface at least partially defines an outer passageway that is sealed from the inner passageway by the one or more sidewalls. The one or more sidewalls are configured to transport one or more of thermal energy from a first fluid or a component of the first fluid flowing in the inner passageway to a second fluid flowing in the outer passageway without the first fluid mixing with the second fluid.

A machine system includes a compressor, and a cooler having an inlet tank to receive compressed air from the compressor, and a header assembly attached to the inlet tank and including a plurality of cooling tubes supported in the header and each having an external heat exchange surface exposed to a flow of cooling air. The cooler further includes a plurality of graphite pack seals each extending peripherally around one of the cooling tubes, and a clamping assembly clamping the pack seals against the header to squeeze the pack seals into sealing contact with the cooling tubes and the header.

A heat exchanger includes a plurality of heat transfer tubes (3) and a centrally arranged bypass tube (4), which are held each between a tube plate (5) of a gas inlet chamber (7) and a tube plate (6) of a gas outlet chamber (8) that are connected to a cylindrical jacket. A coolant (11) is introduced into the jacket space (9) enclosing the tubes (3, 4). A control device (16), includes a throttle valve (18) and a drive (19), sets a gas outlet temperature range of the heat exchanger (1). A discharge rate and a discharged quantity of an uncooled process gas stream (14) from the bypass tube is controlled by the throttle valve, at an outlet end (17) of the bypass tube and is adjustable via the control device. The throttle valve is formed of a material resistant to high-temperature corrosion in a temperature range sensitive for high-temperature corrosion.

In a heat exchanger with double-walled tubes, an end junction between inner tube and outer tube comprises an end plate in which there is a seat in which an end portion of the inner tube is housed. The corresponding outer tube is peripherally fixed sealingly around the opening of the seat and a deflector extends the inner wall of the outer tube inside the seat so as to define a toroidal cavity between the deflector and a side wall of the seat. The seat is closed by a bottom which is opposite to the opening of the seat and which has a passage connected sealingly to the end of the inner tube in the seat for the transit of the fluid to be cooled. A radial space is present near the said bottom between the toroidal cavity and internal cavity of the double-walled tube, and the end plate has at least one conduit which emerges inside the toroidal cavity for the inflow or outflow of the cooling fluid. In this way a junction and an exchanger with such a junction which are robust and have innovative performance features may be provided.

A heat exchanger is provided. The heat exchanger provides a first plurality of tubes and a second plurality of flow passages which furcate near one of the first and second manifolds into two or more furcated flow passages and subsequently converge to exit the heat exchanger. The plurality of furcated flow passages are intertwined, reducing the distance between flow passages containing each fluid therebetween to improve thermal transfer. Further, the furcations create changes of direction of the fluid to re-establish new thermal boundary layers within the flow passages to further reduce resistance to thermal transfer.