A gas turbine has a shaft arranged for driving a compressor and being rotatable with respect to another component, wherein a stream of bleed air from the compressor can flow between the shaft and the other component, wherein a duct is fixed with respect to the shaft such that the stream of bleed air can flow though the duct, wherein the duct surrounds the shaft. A heat exchanger may be arranged in the duct such that the bleed air is cooled by air within the shaft.

An exhaust gas recirculation (EGR) cooler may include a housing forming the receiving space and in which a coolant inflow hole and a coolant exhaust hole are respectively formed so that a coolant of the cylinder block flows into and out, a cover plate mounted on the housing to close the receiving space and in which an exhaust gas inflow hole and an exhaust gas outflow hole are respectively formed so that an exhaust gas flows into and out, a core including both side caps in which a penetration hole respectively connected to the exhaust gas inflow hole and the exhaust gas outflow hole in the receiving space and a tube through which the exhaust gas communicates while connecting both the side caps to each other, and a connector respectively connecting the penetration hole of the cap to the exhaust gas inflow hole and the exhaust gas outflow hole of the cover plate.

Disclosed a heat exchanger comprising: a plurality of parallel tubes for conveying a first fluid, a pair of header plates, each having a plurality of openings into which respective ends of the tubes are inserted in a fluid-tight manner, a jacket connected to the header plates in a fluid-tight manner and defining with the header plates an inner volume for receiving a second fluid, the tubes being placed within the inner volume, and a fluid channel joined to a wall of the jacket, the fluid channel being in fluid communication with the inner volume through an opening formed through the wall, wherein the wall is, on an opposite side relative to the fluid channel, joined to sidewalls of said tubes.

A tube for a thermal transfer device can include at least one wall having an inner surface and an outer surface, where the inner surface forms a cavity. The inner surface can be non-cylindrical. The cavity can be configured to receive a fluid that flows continuously along a length of the at least one wall.

A heat transfer apparatus is provided, comprising a fluid-tight first housing and at least one fluid-tight second housing, wherein the at least one second housing is arranged in the first housing, a fluid-tight third housing is arranged in the at least one second housing, a first medium flow is guided between the first housing and the at least one second housing, a second medium flow is guided in the third housing, the heat transfer apparatus comprises a heat storage device with a heat-conducting medium, the heat storage device is arranged between the at least one second housing and the third housing, and wherein the heat storage device is in thermal contact with the at least one second housing and the third housing.

A method of manufacturing a heat exchanger includes providing a first plurality of micro-tubes, wherein each micro-tube has a first side and a second side extending along a first axis, and providing a first plurality of fins, wherein each fin having a first base having a first face and a second face disposed opposite the first face. The method further includes disposing the first side of each micro-tube of the first plurality of micro-tubes on the first face of the first base of the first plurality of fins and joining an entire length of the first side of each micro-tube of the first plurality of micro-tubes to the first face of the first base of the first plurality of fins to define a first heat exchanger layer.

A heat exchanger includes: a stack formed by stacking a plurality of tubes through which gas flow; a tubular inner tank in which the stack is housed; and a tubular outer tank that is mounted on the outside of the inner tank so as to define an inner space between the outer tank and an outer peripheral surface of the inner tank. Each of both end portions of the tubes has a thickness greater than each of middle portions of the tubes. The both end portions of the tubes adjacent to each other in the stack are joined together so as to form a clearance between the middle portions of the adjacent tubes in the stack. Outer peripheries of both end portions of the stack are joined to an inner peripheral surface of the inner tank. An introduction hole for introducing a cooling medium is formed in the outer tank.

A heat exchanger for a vehicle is provided to improve fuel efficiency by implementing an integrated structure of exhaust gas heat recovery function and thermoelectric generation function. The heat exchanger allows exhaust gas that is flowed into the heat exchange generator in the cold start mode of the vehicle to pass through the exhaust gas heat recovery component side and thermoelectric generation component side. Therefore, the temperature of the coolant rapidly increases, thereby reducing the engine warm-up time, and electricity is generated through thermoelectric module, thereby maximizing the fuel efficiency improvement.

Fractionation, the process used by refineries to break down carbon chains of petroleum compounds so that the desired carbon compound can be achieved. This process typically involves high heat, distillation, re-boiling, and energy intensive cooling processes. This application discloses an invention that will condense vapor produced by a pyrolysis reactor. This system uses one standard cyclone; three cascading cyclones with internal cyclonic rotation fins that force incoming vapor to maintain a fixed amount of rotation regardless of the vapor's velocity, heat sinks that increase condensation, reversing fins that force gases to reverse direction inside the cyclone decreasing vapor velocity to increase heat loss; a main collection tank that allows for the controlling of the fuel flash point; a compact low temperature coil cooler that uses 100 percent of the cooling surface that allows for the production of higher quality fuel; and, bubblers/scrubbers that produce back pressure into the pyrolysis reactor.

A heat exchanger tube is constituted by a flat tube body 14 shaped like a plurality of cylindrical tubes arranged mutually proximally in a plane and connected together at mutually proximate portions of the tubes as communicating portions 13. Cylindrical portions 15 corresponding to the cylindrical tubes of the flat tube body 14 have inner peripheries formed with swirling-flow-forming protrusions 16 directed along spiral trajectories coaxial with central axes O of the cylindrical portions 15 so that the respective cylindrical portions 15 may have individual swirling flows of the exhaust gas 10.