A double-tube heat exchanger includes an outer tube and an inner tube forming a first annular gap. The outer tube is provided with an inlet connection and an outlet connection for inletting and outletting a first fluid flowing in the first annular gap. The inner tube includes a first inlet connection and a second outlet connection for inletting and outletting a second fluid flowing in the inner tube for an indirect heat exchange with the first fluid. One of the tube sections is integrally formed with an assembly wall which joints a first end of the outer tube to the inner tube, to seal the first annular gap at the first end of the outer tube. A second annular gap is exposed to the air and is in fluid communication neither with the first annular gap nor with the inner tube, and is partially surrounded by the first annular gap.

A heat exchanger includes a casing configured to direct a working fluid therethrough, and at least one heat exchanger (HE) section in the casing. Each HE section includes a pair of spaced supports. The spaced supports include: an upstream support and a downstream support with at least one of them including a coolant carrying body configured to direct a coolant therethrough. A first cross-support couples to and extends between respective upstream and downstream supports; and at least one second cross-support couples to and extends between the respective upstream and downstream supports. Cross-supports are vertically distanced from adjacent cross-supports. A plurality of tube positioners coupled to each cross-support position a plurality of heat exchange tubes extending across a working fluid path through the casing. The tube positioners and the cooling of the cross-supports allows ferritic material to be used for once-through, duct-fired HRSGs.

A water heater can include a baffle and a slab heat exchanger with at least two rows of heat exchanger tubes, each row comprising a plurality of heat exchanger tubes. At least one of the heat exchanger tubes comprises a tube and a plurality of fins on the exterior of the tube circumscribing the tube, wherein the outer edge of each fin of the plurality of fins is bent at least at the same three areas of each fin such that the bends form at least three flat or concave areas running along the length of the heat exchanger tube.

A curved plate heat exchanger includes a heat exchange unit in which heat medium flow paths and combustion gas flow paths are alternately formed to be adjacent to each other in spaces between a plurality of plates, wherein the plurality of plates are configured in such a manner whereby a plurality of unit plates, in which first and second plates are stacked, are formed; wherein the heat medium flow paths are formed between the first plate and the second plate of the unit plate; and wherein the combustion gas flow paths are formed at constant interval between the second plate of the unit plate located on one side of the adjacent unit plates and the first plate of the unit plate located on the other side.

Embodiments of the invention are shown in the figures, where a system is presented for detecting a heat exchanger blockage, including: a heat exchanger and a bypass for the heat exchanger; a temperature sensor for measuring a temperature of a fluid downstream the heat exchanger; and a control system adapted to detect a bypass opening based on the measured fluid temperature, and to provide a signal indicating the bypass opening in response to the detection of the bypass opening.

A multilayered material system includes at least one of a liner sheet and a cellular core, and a multilayered composite joined to the at least one of a liner sheet and a cellular core. The multilayered composite includes hollow microspheres dispersed within a metallic matrix material.

A heat exchanger for managing thermal energy between a flow of a first fluid and a flow of a second fluid includes first and second parting sheets and a closure bar extending between the first and second parting sheets. The closure bar includes an elongate body, a shield positioned upstream from the body relative to a direction of the flow of the first fluid, and a support connecting the shield to the closure bar.

A heat exchanger includes first and second parting sheets, a cold fin extending between the first and second parting sheets, and a closure bar extending between the first and second parting sheets. The closure bar includes first, second, third, and fourth surfaces, a body, first and second ends, an inlet, and an outlet. The body forms an opening that extends from the first end to the second end of the body. The first surface faces the cold fin. The second surface is an opposite side of the body from the first surface. The third surface is in contact with the first parting sheet. The fourth surface is in contact with the second parting sheet. The inlet is disposed at the first end of the closure bar and is fluidly connected to the outlet via the opening. The outlet is disposed at the second end of the closure bar.

The present disclosure describes a heat exchanger of a motor vehicle that is supplied with a cooling air mass flow that changes depending on a travelling speed of the motor vehicle. The heat exchanger includes a heat exchanger block with a plurality of flat tubes that are each received on a longitudinal end side in an associated passage opening of a tube sheet and provide a coolant path. A tank is connected to the tube sheet and defines a coolant header. An additional element is arranged on an outer edge or on an outer marginal region of the tube sheet. The additional element is structured and arranged to provide an at least partial covering of the tube sheet relative to an inflow side, e.g., relative to the cooling air mass flow.

An exhaust gas recirculation heat exchanger assembly that includes a tube, a fin structure, and a clip. The tube has first and second walls extending between a first lateral end and a second lateral end. The fin structure is received in the tube to form a cooling tube assembly. The cooling tube assembly defines a first channel between the first lateral end and a first fin of the fin structure, a second channel between the second lateral end and a second fin of the fin structure disposed opposite the first fin, and a plurality of intermediate channels extending between the first and second channels. The clip is coupled to the cooling tube assembly. The clip has at least one flow impeding portion being configured to impede a fluid flow through at least one of the first channel, the second channel, and one or more of the intermediate channels.