A heat exchanger with centric structure for waste heat recovery is disclosed. The heat exchanger (2) includes an annular heat exchange passage (10) with an array of heat exchange pipes located therein and a bypass passage (6) located concentrically within the heat exchange passage. A valve arrangement (40) is provided to switch the flow of exhaust gas between a duty mode and a bypass mode. The valve arrangement comprises a central chamber and a valve plug (96) that is axially movable between a duty position and a bypass position.

A heat exchanger for providing thermal energy transfer between a first flow along a first flowpath and a second flow along a second flowpath has a plate bank having a plurality of plates, each plate having: a first face and a second face opposite the first face; a leading edge along the second flowpath and a trailing edge along the second flowpath; a proximal edge having at least one inlet port along the first flowpath and at least one outlet port along the first flowpath; and at least one passageway along the first flowpath. An inlet manifold has at least one inlet port and at least one outlet port. An outlet manifold has at least one outlet port and at least one inlet port. The first flowpath passes from the at least one inlet port of the inlet manifold, through the at least one passageway of each of the plurality of plates, and through the at least one outlet port of the outlet manifold.

A heat exchanger including: a heat exchanger main body forming a flow path through which a fluid circulates; heat transfer tubes arranged side by side so as to extend in an extending direction of the flow path; and a baffle plate group having a plurality of baffle plates provided with gaps therebetween in the extending direction of the flow path while supporting the heat transfer tubes. The baffle plates are provided so as to each occupy only a portion of the flow path cross section when viewed from the extending direction of the flow path, and the baffle plates of the baffle plate group are provided such that at least a portion of mutually occupied areas do not overlap, and that the entire area of the flow path cross section is occupied by combining the mutually occupied areas, as seen from the extending direction of the flow path.

An apparatus includes an integrated heat exchanger and reactor module. The integrated heat exchanger and reactor module includes a heat exchanger channel, and a reactor channel which is thermally coupled to the heat exchanger channel. The reactor channel includes a layer of catalyst material that is configured to produce hydrogen by endothermic catalytic decomposition of ammonia, which flows through the reactor channel, using thermal energy that is absorbed by the reactor channel from the heat exchanger channel.

A heat exchanger including a sealed housing and a body positioned inside the housing, the body including a stack of least one first assembly of first and second plates pressed against each other, between which flows a first fluid, and at least one second assembly of third and fourth plates pressed against each other, between which flows a second fluid, the first and second assemblies being arranged so that they transfer heat between the first and second fluids. This configuration limits the risk of leaks and mixing of the two fluids.

A gas turbine engine is provided including a turbomachine having a compressor section, a combustion section, and a turbine section arranged in serial flow order; a rotor assembly driven by the turbomachine, the rotor assembly, the turbomachine, or both comprising a substantially annular duct relative to the centerline of the gas turbine engine, the annular duct defining a flowpath; a heat exchanger positioned within the annular duct and extending substantially continuously along the circumferential direction, the heat exchanger comprising a first material defining a heat exchange surface exposed to the flowpath, wherein the first material defines a heat exchange coefficient and wherein the heat exchange surface defines a surface area (A), and wherein the heat exchanger has an effective transmission loss (ETL) of between 5 decibels and 1 decibel for an operating condition.

An assembly for a turbomachine through which an air flow passes, includes a stator including guide vanes extending radially in relation to a longitudinal axis, at least one inter-vane platform extending between the radially outer ends of two circumferentially consecutive guide vanes, each inter-vane platform including an outer surface that faces the axis, a heat exchanger located downstream of the stator in relation to a direction of circulation of the air flow in the turbomachine during operation, this stator including a heat exchange surface extending in the extension of an inter-vane platform. At least one inter-vane platform located in the upstream extension of the heat exchange surface is provided with at least one turbulence generator on its outer surface.

An annular duct including a modular annular heat exchanger for a gas turbine engine is provided, where the modular annular heat exchanger includes a plurality of radial modules in circumferentially adjacent arrangement. Each radial module includes a cooled fluid inlet plenum segment, a plurality of blades, and a cooled fluid outlet plenum segment. The plurality of blades is configured in circumferentially adjacent arrangement and defines an angular space that is conformal between each circumferentially adjacent blade. The cooled fluid inlet plenum segment, the plurality of blades, and the cooled fluid outlet plenum segment are in serial axial flow arrangement and define an internal cooled fluid flowpath and an external cooling fluid flowpath parallel to the internal cooled fluid flowpath. Each radial module further includes an inner annular ring segment and an outer annular ring segment. The inner annular ring segment and the outer annular ring segment define a plurality of blade retainers. The blade retainers define an axial, radial, and circumferential position of the blades, the cooled fluid inlet plenum segment, and the cooled fluid outlet plenum segment.

The invention relates to a heat exchanger unit for an exhaust gas system. The heat exchanger unit comprises an inlet for a fluid flow to enter the heat exchanger unit and an outlet for a fluid flow to exit the heat exchanger unit. The heat exchanger unit comprises a heat exchanger having a heat exchanger conduit passing through the heat exchanger and at least one bypass conduit bypassing the heat exchanger, wherein the at least one bypass conduit comprises a bypass core having a plurality of channels arranged longitudinally along the bypass conduit.

A heat exchanger and heat exchanger core are provided. The heat exchanger core includes a plurality of columnar passages extending between an inlet plenum of the heat exchanger core and an outlet plenum of the heat exchanger core, the columnar passages formed monolithically in a single fabrication process.