Abstract: A method of recovering waste heat includes pressurizing a flow of working fluid and transferring heat from a hot gas stream to the flow of working fluid in at least two successively arranged heat transfer sections. At least some of the working fluid is converted to a superheated vapor by the transfer of heat, and passes through an expander to recover useful work. A portion of the flow of working fluid is directed along a branch after having passed through at least one of the heat transfer sections, and bypasses the expander and at least one of the heat transfer sections before being recombined with the working fluid that has passed through the expander. The total flow rate of working fluid can be adjusted to regulate the temperature of the hot gas stream downstream of the heat transfer sections, and the amount of fluid that bypasses along the branch can be adjusted to regulate the temperature of the superheated vapor.

Abstract: A heat exchanger assembly, by means of which compressed charge air for an internal combustion engine is cooled by way of a liquid, includes a housing with a heat exchanger that has a stack of pairs of plates and fins which are arranged between the pairs, and has two longitudinal sides and two transverse sides. Flow plates are arranged in the plate pairs and, toward the longitudinal sides, expose in each case one edge channel within the plate pairs. An inlet and an outlet are connected to the edge channels, and a liquid flows through the flow plates between the edge channels, the liquid flowing in counterflow with respect to the charge air which flows in on one side of the housing, through the fins, and leaves the housing again on an opposite other side.

Abstract: A space conditioning system includes a hot gas reheat section and one or more modulating valves to direct a percentage of refrigerant flow to the hot gas reheat section. The hot gas reheat section includes multiple refrigerant circuits arranged in parallel. A control valve is used to allow the refrigerant to flow through selected ones of the multiple refrigerant circuits in response to the percentage of refrigerant flow directed to the hot gas reheat section, thereby varying the internal volume of the hot gas reheat section available to the refrigerant. Refrigerant charge hold-up within the hot gas reheat section can thereby be minimized.

Abstract: A brazed plate heat exchanger with at least one stack of heat exchanger plates and at least one functional component connected by piping physically and in terms of flow to the stack, for example, a collecting tank, in which case the stack executes a settling movement during brazing. Production is achieved in that the plate heat exchanger with the functional component is produced in a vacuum brazing furnace in a single brazing process, in which at least one structure is contained in the piping that compensates for the settling movement of the plate stack. A corresponding production method is also proposed.

Abstract: A heat exchanger includes a bundle of tubes, which can be inserted into a tubular housing. Exhaust gas can flow through the tubes. A coolant duct can be arranged between the tubes. The bundle of tubes can have at least one grid-like securing structure which supports the bundle in the housing. The behavior of the heat exchanger with respect to vibrations is affected by outwardly curved metallic springs attached to the bundle of tubes which may be deformed in the opposite direction to the insertion direction of the bundle into the housing. The spring force is directed against the housing in order to dampen vibrations. The heat exchanger can also include an elastic device for permitting a change in length caused by temperature changes.

Abstract: The disclosure relates to a heat exchanger, for example an indirect air cooler, in which the air, for example compressed charge air for an internal combustion engine, is cooled, for example by a fluid, wherein the heat exchanger is constructed from stacked pairs of plates. The exemplary fluid can be conducted into an inlet region and/or outlet region of the plate pairs in at least one flow path approximately in the direction of the common edge, and further through at least a first duct approximately in cross current with respect to the exemplary air, and passes further through the plate pairs over the largest heat exchange area of the plate pairs approximately in countercurrent with respect to the air, in order to flow through at least one second duct, approximately in cross current with respect to the exemplary air, and back to the outlet.

Abstract: A heat recovery system has an evaporator in which a working medium is evaporated, an expander by means of which energy from the working medium in vapor form is made usable, a recuperator operating as an internal heat exchanger, a condenser that condenses the working medium in vapor form, and a pump to move the working medium through a circuit. At least one plate heat exchanger with flow channels formed in interspaces between the heat exchanger plates is provided as a component of the system and includes at least the recuperator and the condenser.

Abstract: A heat exchanger includes a stack of plates which form ducts. Each of the plates can have at least two openings which, in the plate stack, form at least one collecting duct and one distributor duct which connect the ducts in terms of flow. A base plate can be arranged on the plate stack and can have a seal for sealing off the heat exchanger and a flow deflector for manipulating flow through the heat exchanger. The seal and the flow deflector can form a common component.

Abstract: A heat exchanger that transfers heat from an exhaust gas flow to a liquid coolant includes a first heat exchange section and a second heat exchange section located adjacent the first heat exchange section. The first heat exchange section is located within a first housing that at least partially encloses a first fluid volume. The second heat exchange section is located within a second housing that at least partially encloses a second fluid volume. A first plurality of heat exchange tubes traverses the first heat exchange section, and a second plurality of heat exchange tubes traverses the second heat exchange section. An exhaust gas flow path of the heat exchanger includes the first fluid volume and the interiors of the second plurality of heat exchange tubes. A coolant flow path of the heat exchanger includes the second fluid volume and the interiors of the first plurality of heat exchange tubes.

Abstract: A cooled gear housing includes a first casing section and a second casing section joined together to define an internal volume of the gear housing assembly. A heat conducting membrane is arranged within the gear housing assembly to hydraulically separate a first portion of the internal volume from a second portion of the internal volume. Two or more meshed gears are located within the first portion of the internal volume. Coolant inlet and outlet ports are arranged on one of the casing sections, and are in fluid communication with the second portion of the internal volume.

Abstract: A heat exchanger including a stack of tubes, a cover plate, and a housing in which the stack of tubes is arranged. The housing includes first, second, and third adjacent housing sides having a respective first, second, and third housing openings each having a edge around the respective housing opening. The second housing opening is closed by the edge of the cover plate on the edge of the second housing opening. The housing further includes first and second exposed struts. The first exposed strut is positioned between the first and the second housing openings and the second exposed strut is positioned between the second and the third housing openings, and a first side of an edge of the cover plate is fastened to the first exposed strut and a second side of the edge of the cover plate is fasted to the second exposed strut.

Abstract: A stub connection for a heat exchanger that is arranged in a housing and has a stack including plates and fins. The housing consists of housing parts which can be joined together, and at least one first stub for a first heat-exchanging medium being integrated directly into the housing. The stub connection also includes at least one second stub for a second heat-exchanging medium that extends to outside the housing. The at least one second stub is configured for the connection of a line and is integrated directly or indirectly into the housing.

Abstract: A heat exchanger arrangement in a housing, such as an intake pipe of an internal combustion engine, has at least one stack including tubes and fins and an end plate having media connections, and wherein the stack is inserted into the housing and is fastened therein. A connecting block which contains the media connections and/or at least one profiled rail is arranged on the end plate. The housing has at least one cross-section-expanding wall graduation and/or at least one receptacle integrated into the housing wall, wherein the connecting block sits in the cross-section expansion and/or a cross section of the receptacle corresponds approximately to a cross section of the rail.

Abstract: An evaporator includes an inlet manifold, an outlet parallel to the inlet manifold, and a collection manifold parallel and adjacent to the outlet manifold. First flow conduits extend from the inlet manifold to the collection manifold, and at least one second flow conduit extends from the collection manifold to the outlet manifold. The evaporator can be housed within an enclosure to provide a cased evaporator. Air is conditioned by transferring heat from the air to refrigerant as the air passes through the evaporator. The refrigerant is received from outside the enclosure into the inlet manifold, and is directed through first and second refrigerant passes to receive heat from the air. The flow of refrigerant is received from the second pass into a collection manifold, is transferred to an outlet manifold, and is removed from the enclosure.

Abstract: A heat exchanger arrangement, for example for an internal combustion engine, having a brazed radiator block (1) which has flow paths (10) formed from pairs of plates and has flow ducts (3) between the plate pairs (P), wherein in each case at least one plate (11) of each plate pair has a plate elongation (12), and wherein the brazed radiator block is arranged in a housing (2) and, at its circumference, is sealed off with respect to the housing. To improve the sealing action between the radiator block (1) and the housing (2), it is provided according to the invention that the plate elongations (12) are formed such that a prescribed dimension of the brazed radiator block (1) can be set by means of deformation of the plate elongations (12).

Abstract: A heat exchanger is provided to efficiently transfer heat between air and a flow of refrigerant in a reversing air-sourced heat pump system. When the system is operating in heat pump mode, a flow of air is directed through the heat exchanger and is heated by the refrigerant. A portion of the flow of air is prevented from being heated by the refrigerant in a first section of the heat exchanger, and is used to sub-cool the refrigerant in another section of the heat exchanger after the remaining air has been heated by the refrigerant. The same heat exchanger can be used to cool a flow of air using expanded refrigerant when the system is operating in an air conditioning (cooling) mode.

Abstract: A stub connection for a heat exchanger that is arranged in a housing. The stub connection includes a first part which is fastened to the heat exchanger and a second part which has a stub shank extending through an opening in the housing and is seated in a hole of the first part. The stub connection also includes at least two seals. The first seal is an annular seal, which is seated in a groove of the stub shank and the second seal is a gasket, which is arranged between the opening, the stub shank, and the first part. The first seal is seated in the hole and seals between the stub shank and the first part.

Abstract: Heat exchanger systems described and illustrated here in include multiple stacked plates each defining an aperture, first and second flow ducts formed by the stacked plates, multiple inflow and outflow ducts formed by the apertures in the stacked plates, a first heat exchanger section defining a condenser including first and second flow ducts, a second heat exchanger section defining an evaporator, first, second and third fluids, and an expansion element for the first fluid connected to the heat exchanger. In some embodiments, the first fluid is in heat-exchanging contact with the second fluid in one of the first and second heat exchanger sections, the first fluid is in heat-exchanging contact with the third fluid in the other of the first and second heat exchanger sections, and/or the first fluid flows through the first flow duct in the first heat exchanger section.