A Co-based alloy heat exchanger comprises: in mass %, 0.08-0.25% C; 0.1% or less B; 10-30% Cr; 5% or less Fe and 30% or less Ni, the total amount of Fe and Ni being 30% or less; W and/or Mo, the total amount of W and Mo being 5-12%; Ti, Zr, Nb and Ta, the total amount of Ti, Zr, Nb and Ta being 0.5-2%; 0.5% or less Si; 0.5% or less Mn; 0.003-0.04% N; and the balance being Co and impurities. The impurities include 0.5% or less Al, and 0.04% or less O. The heat exchanger is a polycrystalline body of matrix crystal grains with an average size of 5-100 μm. In the matrix crystal grains, segregation cells with an average size of 0.13-2 μm are formed, wherein components constituting an MC type carbide comprising Ti, Zr, Nb and/or Ta are segregated in boundary regions of the segregation cells.

Devices and methods for fabrication of a multiscale porous high-temperature heat exchanger for high-temperature and high-pressure applications are disclosed. The heat exchanger can include a core with macrochannels formed in a checkerboard pattern to facilitate alternative flow of working fluid having hot and cold temperatures between adjacent macrochannels. Each macrochannel can include a two-dimensional microchannel array that further distributes flow throughout the heat exchanger to enhance heat transfer and mechanical strength without significant pressure drop penalty. The heat exchanger can further include a header integrated therewith to distribute working fluid flowing through the heat exchanger through the outlets such that it flows evenly therethrough. Methods of fabricating heat exchangers of this nature are also disclosed.

A heat exchanger having multiple plates which are mutually parallel and parallel to a longitudinal direction, the exchanger having a length measured in the longitudinal direction, the plates being stacked with spacing so as to define a first series of passages for the flow, in a general flow direction parallel to the longitudinal direction, of at least a first refrigerant fluid and a second refrigerant fluid, at least one passage of the first series being defined between two adjacent plates.

A heat exchanger usable with a ventilator, the heat exchanger having an improved structure so that air passing through the heat exchanger may be prevented from leaking. The heat exchanger of the general inventive concept includes a heat-exchanging element having a plurality of liners stacked in a uniformly spaced state and a plurality of spacers disposed between the liners to define air passages, and corner guides respectively coupled to corners of the heat-exchanging element. Each of the corner guides includes a guide channel forming a space to receive the corner of the heat-exchanging element so that the corner guides securely come into close contact with the heat-exchanging element, and to minimize a loosening of the corner guide due to an adhesive applied between the heat-exchanging element and the corner guide.

A heat exchanger includes a separator member that divides a first flow passage from a second flow passage. The heat exchanger also includes a plurality of first hollow members that extend across the first flow passage at respective non-orthogonal angles. The plurality of first hollow members are fluidly connected to the second flow passage. Moreover, the heat exchanger includes a plurality of second hollow members that extend across the second flow passage at respective non-orthogonal angles. The plurality of second hollow members are fluidly connected to the first flow passage.

Two or more cores (2a, 2b) in each of which two more types of passage layers through which two or more fluids flow are layered alternately are welded together. The entire bottom portions of the cores (2a, 2b) are covered with a lower header tank (3), thereby making the fluids flow into the cores (2a, 2b). A dummy layer (14) through which none of the fluids flow is provided beside a weld side face of each core (2a, 2b). A weld spacer (18) is welded to the entire peripheral edge of a side plate (16) of the dummy layer (14). A through-hole (16a) for draining water in the dummy layer (14) is made near the lower end of the side plate of the dummy layer (14). Further, a liquid drain hole (20) through which water is drained is made at a lower corner of the weld spacer (18).

Heat integrated distillation column for separating components in a fluid mixture. The heat integrated distillation column is provided with a stripper part (S), a rectifier part (R) and a compressor (2) between the stripper part (S) and the rectifier part (R). Furthermore, a heat exchange assembly for transferring heat between the stripper part (S) and the rectifier part (R), and a mass transfer assembly for condensation and vaporization in the heat integrated distillation column are provided. The stripper part (S), the rectifier part (R), or the stripper part (S) and rectifier part (R), comprise a channel formed by adjacent channel assemblies (6), each forming a structural part of the heat integrated distillation column and a functional part of the heat exchange assembly and of the mass transfer assembly. A plate (8) and a structured packing in the form of two or more corrugated plates (7) are provided.

A heat exchange unit for a ventilation device includes: a case having a first inlet port through which first air is sucked and a second outlet port through which second air is discharged formed on a front side, and a first outlet port through which the first air is discharged and a second inlet port through which the second air is sucked formed on a back side; and heat exchangers having a first air passage through which the first air passes and a second air passage through which the second air passes formed thereon. A first separation plate for separating the first inlet port and the second outlet port is installed in the height direction on the front side of the case. A second separation plate for separating the second inlet port and the first outlet port is installed in the height direction on the other side of the case.

The plate heat exchanger and method for manufacturing a plate heat exchanger comprise a stack of heat transfer plates, with first and second flow channels arranged between the plates. Pairs of heat transfer plates form cells. A cell comprises inner spacing elements arranged between the heat transfer plates leaving open a first inlet opening and a first outlet opening for the one of the fluids. The cell also comprises outer spacing elements welded to the heat transfer plates on the sides of the heat transfer plates facing away from each other. The cells are stacked against each other and joined together by welding via the outer spacing elements. The plate heat exchanger further comprises cover plates for covering sides of the stack of heat transfer plates with interruption for an inlet port section formed by the first inlet openings and an outlet port section formed by the first outlet openings. The two first sides of the cell comprising the first inlet opening or the first outlet opening comprise leakage passageways provided between the heat transfer plates for the one of the fluids, in addition to the passages provided by the first inlet opening and the first outlet opening.

The invention concerns a heat exchanger having an exchange body having first passages for the flow of a first fluid and second passages for the flow of a second fluid exchanging heat with the first fluid, a first inlet manifold for introducing the first fluid into the first passages, a first outlet manifold for discharging the first fluid from the first passages). The heat exchanger also includes an inlet filter arranged facing the inlet surface of the exchange body, and/or an outlet filter arranged facing the outlet surface of the exchange body, the inlet filter and/or the outlet filter having a sheet metallic material selected from a metal gauze, a non-woven fabric of metallic fibres, a sintered metallic powder or sintered metallic fibres.