A water heater includes an outer casing defining a longitudinal axis, an axial direction being defined as extending along the longitudinal axis. The water heater further includes a combustor for production of hot flue gases, a primary heat exchanger including a tube positioned within the outer casing, and a secondary heat exchanger including a plurality of plates coupled together by brazing to form a brazed plate heat exchanger. The secondary heat exchanger includes a first set of passages defined between the plates, and a second set of passages defined between the plates and alternating with the first set of passages in the axial direction. The primary and secondary heat exchangers are in fluid communication such that the flue gases flow through the second set of passages before being exhausted, and water to be heated flows through the first set of passages to a delivery point for use upon demand.

Provided is a gas furnace including a primary heat exchanger and a secondary heat exchanger through which a combustion gas produced by the combustion of a fuel gas flows. The gas furnace includes: a coupling box serving as an intermediary to connect the primary heat exchanger and the secondary heat exchanger; a collect box connected to the secondary heat exchanger, for letting in the combustion gas passed through the secondary heat exchanger; an inducer connected to the collect box, for inducing a flow of the combustion gas; and a bypass pipe connected to one side of the coupling box and including a bypass pipe for guiding the combustion gas passed through the primary heat exchanger to a hot water supply tank for supplying hot water to an indoor space.

A liquid hydrogen vaporizer for performing heat exchange between liquid hydrogen and helium gas and vaporizing liquid hydrogen, comprising: a lower first column tube which is a fin tube composed of a tube through which liquid hydrogen flows and a fin assembly attached to an outer periphery of the tube; and a lower casing through which helium gas flows outside the lower first column tube, wherein the fin assembly is composed of a sleeve covered on an outer surface of the tube and a plurality of fins attached to an outer peripheral surface of the sleeve, and the sleeve is slidable in a longitudinal direction of the tube.

A heat exchange cell (10) is described comprising a helically-shaped heat exchanger (13), mounted in a containment casing (11), in which a first heat transfer fluid circulates; a first heat exchange chamber (22), defined in the casing (11), in which a first heat exchange portion of the heat exchanger (13) is housed and in which a first collection chamber (15) of the second heat transfer fluid is defined externally to the heat exchanger (13); a second heat exchange chamber (26) defined in the casing (11), in which a second heat exchange portion of the heat exchanger (13) is housed and in whichexternally to the heat exchanger (13)a second collection chamber (16) of the second heat transfer fluid is defined; and a fluid outlet passage (35) from the second heat exchange chamber (26) defined in a peripheral side wall (11c) of the containment casing (11) in proximity to a rear wall (11d) thereof. The first and second heat exchange chambers (22; 26) are separated internally to the heat exchanger (13) by a first separating element (14) comprising a substantially plate-shaped body and externally to the heat exchanger (13) by at least a second separating element (32) extending radially between a radially outer wall (13a) of the heat exchanger (13) and the peripheral side wall (11c) of the containment casing (11) so as to define at least one passage (17) of fluid between the first (15) and the second (16) collection chamber of the second heat transfer fluid. The heat exchange cell (10) further comprises a pair of axial separator baffles (24a; 24b), axially extending between the second separating element (32) and the rear wall (11d) of the containment casing (11), and configured to separate a first portion (16a) of the second collection chamber (16) of the second heat transfer fluid defined upstream of the axial separator baffles (24a; 24b) from a second portion (16b) of the second collection chamber (16) of the second heat transfer fluid defined downstream of the baffles (24a; 24b).

The present invention relates to an assembled material tube of hot and cold foods supplying machine, including a plurality of material tube bodies, in which penetrating feed channels are provided internally; each of the material tube bodies has a path provided with an inlet and an outlet to respectively and correspondingly input and output a working fluid through the path for performing thermal exchanges, whereby cooling occurs in segmentations for each of the feed channels; a plurality of temperature measurement units each of which is provided with a detecting end for detecting a temperature in the corresponding feed channel; and a plurality of heating units perform heating in segmentations for each of the feed channels. Accordingly, said machine can be separately used as hot food supplying machine or cold food supplying machine, so as to achieve the aim of using one machine for two purposes.

A heat exchanger (10) of heat pipe configuration for transferring heat between a first and second process streams via a heat transfer fluid comprises: at least one first process stream passage (19); at least one second process stream passage (29); and a shell (11) enclosing the first and second process stream passages (19, 29) within a volume (55). The volume (55), as a result of a heat transfer process, is fully filled with both vapour and liquid phases of the heat transfer fluid. The first and second process stream passages (19, 29) are spaced by a disengagement zone (50) enabling gravitational separation of said vapour and liquid phases and limiting accumulation of liquid phase heat transfer fluid about the first process stream passage(s) (19). Such heat exchangers can be used, among other applications, to replace a flash cooling stage in a Bayer process plant.

An intercooler lid assembly for an intercooler supercharger system comprising an intercooler lid mountable to a supercharger housing; one or more intercooler cores mounted within the intercooler lid; wherein the one or more intercooler cores configured to receive and cool supercharger air passing there through prior to receipt by an engine, the one or more intercooler cores are mounted to and within the intercooler lid to form a pre-assembled intercooler lid assembly mountable onto the supercharger housing to install the intercooler lid assembly, and the one or more intercooler cores configured to provide heat exchange fluid transfer there through to cool the supercharger air.

The present disclosure concerns a heat exchanger, which may for example be utilised in a gas turbine engine or in other applications. Example embodiments include a heat exchanger comprising: an external surface for exchanging heat with an external fluid flow passing over the external surface; a first fluid passage extending through the heat exchanger from a first fluid inlet to a first fluid outlet, a first portion of the first fluid passage extending along the heat exchanger adjacent to the external surface for a first cooling fluid passing through the first fluid passage to exchange heat with the external fluid flow; and a second fluid passage extending through the heat exchanger from a second fluid inlet to a second fluid outlet located at the external surface for a second cooling fluid to pass from the second fluid inlet into the external fluid flow.

The invention concerns an apparatus (10) for separation of components with different volatility in a mixed fluid, said apparatus (10) comprising: a first heat exchanging unit (100) provided with first and second flow path structures (131, 132) forming separate flow paths for a first and a second fluid flow through the first heat-exchanging unit (100); an inlet (118) for feeding the mixed fluid to the apparatus (10); an inlet (119) for feeding steam to the apparatus (10); an arrangement for feeding a cooling medium through the apparatus (10), wherein said arrangement comprises at least one cooling medium inlet (105, 106, 107, 108). The invention is characterized in that the apparatus (10) comprises a second heat-exchanging unit (200) provided with third and fourth flow path structures (233, 234) forming separate flow paths for a first and a second fluid flow through the second heat-exchanging unit (200), wherein the cooling medium arrangement comprises at least one cooling medium inlet (205, 206, 207, 208) arranged in fluid communication with the fourth flow path structure (234) and wherein the first and third flow path structures (131, 233) are arranged in fluid communication with each other.

A system is provided. The system includes at least two heat exchangers that are alternatively cooled by an outlet medium. The system also includes a cooling circuit that provides a cooling medium to the at least two heat exchangers. The cooling circuit provides the cooling medium to a first heat exchanger of the at least two heat exchangers in accordance with a first mode. The cooling circuit provide the cooling medium to a second heat exchanger of the at least two heat exchangers in accordance with a second mode.