A heat exchanger (1) for thermally coupling a first fluid to a second fluid so as to transfer heat and in a fluidically separate manner includes a securing assembly (8) of two cover parts (9) and at least one, preferably a plurality of guide parts (11), through which duct tubes (5) of the heat exchanger (1) pass. The duct tubes (5) extend inside a housing tube (2) along the longitudinal axis of the housing tube (2). The first fluid passes through the housing tube (2) outside of the duct tubes (5), and the second fluid passes through the duct tubes (5). The duct tubes (5) may have circular or flattened cross-sections.

A condenser of a refrigeration cycle apparatus includes a first passage, a second passage, and a joint. The first passage connects to the compressor at a first end and is constituted of, at a second end, a first flat heat transfer tube including a plurality of passages thereof. The second passage connects to the expansion device at a first end and is constituted of, at a second end, a second flat heat transfer tube including a plurality of passages thereof. The joint joins the first flat heat transfer tube and the second flat heat transfer tube and bends a flow of the hydrofluoroolefin-based refrigerant between the first flat heat transfer tube and the second flat heat transfer tube. A length of the second passage is equal to or shorter than a length of the first passage. The joint is provided, inside thereof, with a hollow portion.

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.

Disclosed is a shell-and-tube heat exchanger type with a tube bundle and has a redistribution chamber connected to tubes of the tube bundle and to a duct. The duct extends between the redistribution chamber and the shell.

An intensified cassette-type heat dissipation module includes a heat sink, an amplifying loop heat pipe, a condensing block and an object of application. The heat sink is provided with an embedding space for latching of plural refrigeration chips and the condensing block. The heat sink utilizes the amplifying loop heat pipe to dissipate heat, and the condensing block is transfixed with a cold-surface loop heat pipe to transmit a cold source to the object of application. The refrigeration chips transmit energy to the condensing block, and the cold-surface loop heat pipe supplies energy required by the object of application.

Heat exchangers, heat exchanger systems, and hypersonic vehicles are provided. For example, a heat exchanger is provided that comprises a first chamber for receipt of a flow of cool fluid and a second chamber for receipt of a flow of hot fluid. The heat exchanger further comprises a buffer fluid flowpath for circulation of a buffer fluid therethrough. The buffer fluid circulates within the buffer fluid flowpath disposed between the first chamber and the second chamber to transfer heat from the hot fluid to the cool fluid. In certain embodiments, a hypersonic vehicle comprises such a heat exchanger, and the cool fluid is cryogenic or near-cryogenic fuel of the hypersonic vehicle and the hot fluid is engine bleed air from a hypersonic propulsion engine of the vehicle.

A hierarchical heat exchanger manifold includes: first and second fluid passages respectively open to an inlet and an outlet in a first level of the heat exchanger manifold; a plurality of first and second fluid passages in a second level of the heat exchanger manifold; and a plurality of first and second fluid passages in a third level of the heat exchanger manifold. A number of the first fluid passages in the third level is greater than a number of the first fluid passages in the second level. Each of the first fluid passages in the second level is in fluid communication with the inlet and at least one of the first fluid passages in the third level, and each of the second fluid passages in the second level is in fluid communication with the outlet and at least one of the second fluid passages in the third level.

A heat exchange device effectively collects heat in a device, in which high temperature occurs, such as a scrubber. The heat exchange device includes a first heat exchange unit having a reactor positioned on the center thereof and having a first passage, which is arranged to enclose the reactor and discharges a first gas generated in the reactor, and a second passage, which is arranged adjacent to the first passage and introduces a second gas introduced from the outside. A second heat exchange unit is installed to enclose the first heat exchange unit and having a third passage, which is connected to the first passage and receives the first gas from the first passage to discharge the first gas to the outside, and a fourth passage, which is arranged adjacent to the third passage and introduces the second gas introduced from the outside into the second passage.

A method of manufacturing a box header for an air-cooled heat exchanger. The method includes the steps of boring at least one hole into at least one end of an elongated slab of metal. Material from the slab is milled out adjacent to the at least one hole to form an elongated internal chamber in the slab having at least one open end. An inlet nozzle opening is machined into the elongated chamber and an outlet nozzle opening is machined into the elongated chamber. A plurality of tube holes and a plurality of plug holes are drilled and tapped in the elongated slab into the internal chamber. An end block is welded to the at least one open end in order to form a closed internal chamber.

A heat exchanger comprises a shell having a first inlet and a first outlet for a first fluid (H) and a second inlet and a second outlet for a second fluid (C), and a screw element. The screw element has a core and first and second nested helical flights mounted to the core. The helical flights define first and second helical fluid passages along the shell. The first fluid passage is in fluid communication with the first inlet and the first outlet and the second fluid passage is in fluid communication with the second inlet and the second outlet. The heat exchanger further comprises a plurality of tubes mounted between adjacent turns of the first and second helical flights and extending across the fluid flow passage formed between the helical flights for conducting the first and or second fluid.