Abstract: A plastic heat exchanger has a shell with tanks disposed side-by-side. First and last distribution tanks straddle heat transfer tanks. The shell has a plurality of flow gaps, to allow coolant to flow between adjacent tanks. Spacers hold the flow gaps open. Upper and lower flanges are adhesively attached to the shell. Flange holes align with the tanks. Each flange hole has an annular wall encircling one of the tanks to preclude the shell from expanding. Upper and lower manifolds are adjacent the flanges, and have chambers disposed side-by-side for each heat transfer tank. Baffles are adapted to be removably received between the chambers to selectively block flow. A plurality of tubes extends between upper and lower tube headers, comprising a tube bundle, removably received within each of the heat transfer tanks. A header O-ring is between each header and flange. A seal plate is disposed against each flange. Each seal plate has seal plate holes in alignment with the flange holes, defining a hole pair.

Abstract: Shell and tube heat exchangers that include a baffle arrangement that improves the temperature profile and flow pattern throughout the exchanger and/or that are integral with a reaction vessel are disclosed. Methods for using the exchangers including methods that involve use of the exchanger and a reaction vessel to produce a reaction product gas containing trichlorosilane are also disclosed.

Abstract: The intake air cooler of the invention comprises a first cooling stage (24) and a second cooling stage (26) grouped in a single heat exchanger housing (30) and sharing a common heat exchanger bundle (28) accommodated in the housing and traversed by a cooling liquid. Application to turbocharged internal combustion engines for motor vehicles.

Abstract: An attachment between a heat exchanger and a cell panel of a furnace includes a cell panel including a plurality of cell panel openings and a heat exchanger having a plurality of cells. Each cell has a cell outlet insertable into a cell panel opening of the plurality of cell panel openings. A compressible gasket is insertable between the cell panel openings and the cell outlets and securable therein when the heat exchanger is secured to the cell panel. A crimping tool for securing a heat exchanger cell outlet to a cell panel of a furnace includes a male portion including a split die having two die halves and a die expander configured to separate the two die halves to engage an inner surface of the cell outlet. A female portion applies a force to the cell outlet to crimp the cell outlet to the cell panel.

Abstract: A heat exchanger system and a method of assembly is provided for a gas appliance such as a furnace. The heat exchanger system includes an attachment plate having at least one recess sized to receive an inlet of a heat exchanger. The heat exchanger has a first flange disposed at the inlet that is positioned in the recess. A second flange in the attachment plate recess is crimped onto the inlet flange to couple the heat exchanger to the attachment plate. The attachment plate may also include a pair of slots that extend from the recess that are sized to receive a pair of third flanges on the heat exchanger.

Abstract: A system for cooling and recuperative heating of a slurry in a metallurgical process which includes heat exchangers, pumps and autoclaves is described herein. The heat exchangers use a non-scaling common liquid heat transfer medium. Preferably, the heat exchangers are tube-in-tube heat exchangers with 3 to 7 slurry tubes in each heat exchanger. An advantage of this system is that it does not use flash tanks. To minimize abrasive wear on impinged surfaces, the velocity of the slurry is not more than 5 meters per second. The slurry comprises a solids concentration of 25% to 50%. Preferably, the pumps in the system are float-type pumps in which the driven liquid from the discharge pumps is also used as the drive liquid for the feed pumps.

Abstract: A double pipe and a heat exchanger having the same are provided. The double pipe including an outer pipe and an inner pipe formed within the outer pipe includes: a plurality of barrier ribs formed in a length direction and disposed at a predetermined distance in a circumferential direction between the outer pipe and the inner pipe; and a plurality of protruding portions formed at positions corresponding to each of the plurality of barrier ribs and protruded in a center direction and formed in a length direction of the inner pipe from an inner circumferential surface of the inner pipe. Therefore, by improving heat exchange efficiency by the heat exchanger having the double pipe, cooling efficiency of a cooling system can be improved.

Abstract: The invention relates to a heating assembly (1) comprising at least one PCT element, in particular for a motor vehicle, said PCT element (2) being located between two contact sheets (3, 4), which are used to make electrical contact. According to the invention, the heating assembly (1) comprises a frame (7) and at least one of the two contact sheets (3)comprises a staggered section outside the frame (7), said staggered section of the projecting part (10) of the contact sheet (3) running parallel with the remaining part (11) of said sheet (3).

Abstract: The present invention relates to a PTC heating element with at least one PTC resistance element which is arranged between two electrically conductive plates in a housing opening of a housing and, with at least one of the electrically conductive plates as an intermediate layer, which is pressed with an initial tension against a heat-emitting element which is held at the housing. With the present invention, a PTC heating element of the type mentioned at the beginning that can be manufactured easily and economically is to be specified. To solve this problem, the present invention further develops the PTC heating element mentioned at the beginning in such a way that attachment tabs arranged on the edge of the housing opening protrude beyond the housing opening and in such a way that the heat-emitting element has tab cuts, behind which the tabs engage.

Abstract: A waste heat recycling and gain system includes a waste heat exchanging device disposed beneath a hot water supplier to collect the heat of the hot water, a primary heat exchanging device coupled between the supplier and the waste heat exchanging device to heat the hot water before supplying to the supplier, and an auxiliary heat exchanging device coupled to the waste heat exchanging device to decrease a temperature of the water before flowing into the waste heat exchanging device and to preheat a heat medium that flows through the auxiliary heat exchanging device, in order to effectively recycle or reuse the heat of the waste hot water and to save our energy.

Abstract: A plurality of heat exchange units (12) are placed in a frame (38). Respective heat exchange units (12) are positioned by pin holes (30) formed in fixing plates (21) installed on the heat exchange units (12) and knock pins (29) formed on a pair of bars (22) of the frame (38). The one side tank water inlet/outlet ports (19) and the other side tank water inlet/outlet ports (20) of the heat exchange units (12) are connected to the one side water receiving ports (35) of an upper tank (17) and the other side water receiving ports (36) of a lower tank (18), respectively. The upper tank (17), the heat exchange units (12), and the lower tank (18) are fixed to the frame (38) to form the heat exchanger (11). Thus, the heat exchanger having a specified heat exchange capacity and firmly supportable on a base can be provided.

Abstract: Disclosed is a ductless dryer having a heat exchanger module in accordance with the present invention. The heat exchanger module is configured to have a water-supplying inlet disposed at an outlet for air and to be provided with a sealing unit, a drain recess and a leakage preventing protrusion. Thus, a dehumidifying performance for humid air is enhanced. Accordingly, it is capable of preventing mold from being gathered on a wall of an installation space caused by exhausting the air in which moisture is not removed. Also, it is capable of preventing a user in the installation space from feeling unpleasant caused by exhausting the air in which the moisture is not removed to the installation space.

Abstract: The invention relates to a heat transfer plate (1) intended to constitute, together with other heat transfer plates, a plate stack (2) with permanently connected plates for a heat exchanger (3), which heat transfer plate (1) has a first long side (4) and an opposite second long side (5), a first short side (6) and an opposite second short side (7), a heat transfer surface (8) exhibiting a pattern (9) of ridges (10) and valleys (11), first and second port regions (12 and 13), the first port region (12) being situated in a first corner portion (14) formed at the meeting between the first long side (4) and the first short side (6), the second port region (13) being situated in a second corner portion (15) formed at the meeting between the second long side (5) and the first short side (6), and the first port region (12) being connected to a number of ridges (10a-d) and valleys (11a-e), which ridges (10a-d) and valleys (11a-e) have in principle an extent from the first port region (12) diagonally towards the secon

Abstract: A cooling device is proposed that can be produced by the diecasting process, and which has a heat-transfer unit surrounded by an outer shell, wherein a jacket through which coolant flows is formed between the heat-transfer unit and the outer shell, said jacket is subdivided by webs in such a way that a passage through which coolant flows is formed between the outer shell and the outer casing of the heat-transfer unit. To this end, the webs are arranged in such a way that this circulating flow is effected in a meander shape. Compared with a spiral flow, this results in degrees of freedom with regard to the arrangement of the coolant inlets and coolant outlets. Furthermore, such cooling devices can be produced and assembled in a cost-effective manner and have a high efficiency.

Abstract: A heat exchange structure is connected to a dual water cooling system and a heat dissipating apparatus has the heat exchange structure. The heat exchange structure includes a box as a main body, and the box includes a first cavity and a second cavity. The first cavity and the second cavity are interconnected with separate water cooling systems, wherein the first cavity includes a first chamber, and the first cavity has a water inlet pipeline and a water outlet pipeline, both interconnected to the first chamber. The second cavity includes a second chamber, and the second cavity has a water inlet pipeline and a water outlet pipeline, both interconnected to a second chamber. A heat conducting plate is disposed at a position that connects the first cavity and the second cavity for providing a heat conducting path of the first cavity and the second cavity.

Abstract: A condenser-type heat exchanger having a set of welded plates that together define fluid systems that interpenetrate each other comprises at least two modules of welded plates.

Abstract: An apparatus and method of circulating a heat-absorbing material within a heat exchanger. The apparatus comprises a manifold layer coupled to an interface layer. The manifold layer comprises an inlet manifold and an outlet manifold. The interface layer comprises a plurality of channels that extend from the inlet manifold, toward a heat-exchanging plane, and turn away from the heat-exchanging plane, terminating at the outlet manifold. The plurality of channels are stacked in a plane non-parallel to the heat-exchanging plane. Each of the channels is adjacent to another, thus allowing heat radiated from a heat-generating device to be conducted to a cooling material circulating within the channels, away from the heat-generating device. Preferably, each of the channels has a U-shape or an elongated U-shape.

Abstract: In a charge-air cooling circuit for a multicylinder internal-combustion engine 1 with a turbo-supercharger 2, downstream from the turbo-supercharger 2 the charge air fed to two separate charge-air coolers 6, 6?, whereby the first charge-air cooler 6 divides the charge air into two flow branches I, II, cools the first of the two flow branches I, and allows the second of the two flow branches II to pass uncooled, and whereby the second charge-air cooler 6? allows the first of the two flow-branches I to pass uncooled, cools the second of the two flow branches II, and then recombines the two flow branches I, II.

Abstract: Heat exchange inefficiencies found in round tube plate fin heat exchangers are eliminated in an aluminum heat exchanger that includes first and second headers (20), (22) and at least one flattened tube (24), (70) extending between the headers (20), (22). A plurality of generally parallel tube runs are defined and each has opposite edges. A plurality of plate fins (26), (50) are arranged in a stack and each has a plurality of open ended slots (34), one for each run of the tubes (24), (70). Each of the tube runs (24), (70) is nested within corresponding slots (26) and the fins (26), (50) with one of the edges (40) of the tube runs extending outwardly of the corresponding fin (34). The assembly is brazed together.

Abstract: An improved heat exchanger includes a first tube (10) of generally circular cross section having a relatively large inside diameter and being U-shaped with opposite ends (12,14) adjacent one another. A second tube having a cross section that is relatively small in relation to the cross section of the first tube (10) and helical shaped section (36) intermediate its ends (32,34) is located within the first tube (10) and extends through caps (44) at the ends (12,14) of the first tube (10) to be received in headers (38,40). The first tube (10) impales headers (26,28) and includes apertures (22,24) aligned with the headers (26,28) and in fluid communication with the interiors thereof.

Abstract: A boiling cooler has a heat exchange part in which refrigerant vapor performs heat exchange with cooling water. The refrigerant vapor is produced from liquid refrigerant that is boiled and gasified by heat transferred from a heating element. In this boiling cooler, the refrigerant vapor can be cooled by cooling water having a thermal conductivity larger than that of air.

Abstract: A vertical polygonal heat exchange chamber includes an upper opening, a lower opening, and an enclosure formed between the upper and lower openings. The enclosure includes at least one tapered portion that narrows in a direction toward one of the openings. The tapered portion is lined with N first water tube panels arranged adjacent to and alternately with N second water tube panels, where N is an integer greater than two. Each of the first and second water tube panels is angled inwardly from the widest part of the tapered portion toward the interior of the enclosure, with each of the first water tube panels being angled inwardly to a greater degree than each of the second water tube panels.

Abstract: A vertical polygonal heat exchange chamber includes an upper opening, a lower opening, and an enclosure formed between the upper and lower openings. The enclosure includes at least one tapered portion that narrows in a direction toward one of the openings. The tapered portion is lined with N first water tube panels arranged adjacent to and alternately with N second water tube panels, where N is an integer greater than two. Each of the first and second water tube panels is angled inwardly from the widest part of the tapered portion toward the interior of the enclosure, with each of the first water tube panels being angled inwardly to a greater degree than each of the second water tube panels.

Abstract: The present invention is directed to a thermosyphon heat exchanger. The thermosyphon system eliminates the need for costly and inefficient moving parts in the cooling system. The system also minimizes failures rendering the system inoperable by eliminating mechanical components subject to breakdowns that would render the system inoperable. The design of the heat exchanger coils provides for increased efficiency, reduced cost, and simplified construction and maintenance. The system further reduces the energy consumption required for cooling operation while still providing excellent cooling performance.

Abstract: The invention relates to a bath condenser with a condenser block (1) that has evaporation passages (8) for a liquid and liquefaction passages (2) for a heating medium. The condenser block (1) has at least two circulation sections (7) that are located on top of one another, the evaporation passages (8) each having on the lower end of a circulation section (7) at least one entry opening (9) for the liquid and on the upper end of the circulation section (7) at least one exit opening (10). Only exit openings (10) and entry openings (9) that are located on the same side (12) of the condenser block (1) are connected via means (17, 30) for routing the liquid.

Abstract: A profile of the casing 20 is formed into a circular pipe shape, and the two gas coolers 10a, 10b are integrated into one body so that the longitudinal directions of the respective gas coolers can be substantially parallel with each other. Due to the above structure, it is possible to make the coolant flow smoothly in the casing 20 and stagnation of the coolant seldom occurs. Accordingly, as boiling of the coolant can be suppressed, it is possible to prevent the heat transfer coefficient from being remarkably deteriorated. Further, it is possible to suppress the generation of cracks, in the tubes 11, which are caused by heat stress.

Abstract: A tank body 3 is formed in the shape of an elongated groove having an intermediate first slit 5 disposed at its middle portion in the longitudinal direction and having a pair of end first slits 5a disposed at its opposite ends. A reinforcement member 9 is fitted in the first slit 5 at the middle portion, and a pair of reinforcement side lids 11 are fitted correspondingly in the pair of end first slits 5a at opposite ends. The reinforcement member 9 and the reinforcement side lids 11 are formed with intermediate second slits 8 and end second slits 8a, respectively, which in cooperation serve to clamp the sidewalls 2 of the tank body 3. The opening of the tank body 3 is fitted to the groove-shaped tube plate 4 such that their connections are joined together by brazing or other joining means.

Abstract: In a receiver for separating gas refrigerant and liquid refrigerant and for storing liquid refrigerant for a refrigerant cycle, refrigerant form a condensing portion of a condenser flows into an upper side of a tank member of the receiver from a first refrigerant inlet and flows into a lower side of the tank portion from a second refrigerant inlet. Further, liquid refrigerant stored in the tank member of the receiver is discharged to an outside through a refrigerant outlet. Accordingly, refrigerant from the condensing portion of the condenser flows into the tank portion of the receiver from both upper and lower sides of a gas-liquid boundary surface. As a result, it can prevent the gas-liquid boundary surface of the receiver from being disturbed during a refrigerant introduction of the receiver, while cooling effect of the upper side of the receiver is effectively improved.

Abstract: Device for heating fluid, comprising: a first section for heating the fluid in which fuel and air are mixed and combusted; a second section for heating the fluid which is disposed substantially in the line of the combustion section and in which a number of pipes for the fluid extend substantially transversely of the flow direction of the combustion gases; and a third section for heating the fluid which is disposed substantially in the line of the second heating section and in which a number of pipes for the fluid extend substantially transversely of the flow direction of the combustion gases, wherein at least a number of the pipes in the third section are provided with ribs or fins enhancing the heat transfer.

Abstract: An apparatus and method for the treatment of waste solids that allows for the direct transfer of heat between hot waste solids and cold waste solids in a tube-in-tube heat exchanger. Cold solid waste is moved from a cold solid waste source through one tube of the heat exchanger, and hot solid waste is move from a hot solid waste source through the other tube of the tube-in-tube heat exchanger, and heat is transferred from the hot solid waste to the cold solid waste. The waste treatment, including the heat exchange, can occur in a batch mode or in a continuous mode.

Abstract: A heat exchanger in which refrigerant flows has a first core portion disposed in a first air passage for exchanging heat with inside air and a second core portion for exchanging heat with outside air. The second core portion is disposed at a downstream side of the first core portion in a refrigerant flow direction. Accordingly, refrigerant exchanges heat with inside air, first, and then exchanges heat with outside air, a temperature of which is lower than that of inside air. Further, refrigerant flows to form an opposed flow with respect to an air flow direction in the respective first and second core portions. As a result, heating performance of the heat exchanger is improved.

Abstract: The present invention includes a method, an apparatus, and a system for the treatment of waste. The method includes the steps of providing a cold waste solids tank that has a cold solids batch therein. The cold solids batch is transferred, after being warmed, from the cold waste solids tank to a thermal conditioning tank for thermal conditioning. A hot waste solids tank remote from the cold waste solids tank is also provided. The cold waste solids tank is filled with a new cold solids batch. The new cold solids batch is pumped from the cold waste solids tank through a heat exchanger, the partially cooled hot waste solids batch is simultaneously pumped from the hot waste solids tank through the heat exchanger. Heat is transferred from the partially cooled hot waste solids batch to the new cold solids batch in the heat exchanger to obtain a pre-warmed solids batch and to obtain a cooled solids batch. The cooled solids batch is discharged from the hot waste solids tank.

Abstract: A tube-in-tube heat exchanger for exchanging heat between two fluids is provided. The heat exchanger has at least one tube pair; spaced apart first and second tube sheets; first and second annular flow chambers; and first and second inner tube flow chambers. A gasket surrounds each inner tube of each tube pair at each end, forming a seal between each annular flow chamber, each inner tube flow chamber, and each inner tube. Such configuration allows for modular construction and easy cleaning and replacement of fouled or damaged tubes.

Abstract: Space and weight constraints on heat exchangers performing heat exchange operations between three or more fluids are eliminated in a structure including a plurality of plates (10, 12) arranged in a stack (13). Collars (36, 38) about openings (30, 32) the plate (10, 12), divide the spaces between the plates (10, 12) into two different types of spaces (44, 46). A connecting flange (50) with a tube (46) and a separator element (64) cooperates with holes (54) and (56) within the plates that (10, 12) to isolate certain of the spaces (44) from other of the spaces (44) providing a means for flowing different heat exchange fluid through different ones of the spaces (44) while flowing still another heat exchange fluid through the spaces (46), all in a single structure.

Abstract: The method and apparatus for continually molding, chilling and cutting cheese of the present invention utilizes an elongate molding tube having an inlet end and an outlet end, and a pump/movement mechanism for forcing cheese curd into the inlet end of the elongate molding tube. A cooling mechanism is disposed in communication with the elongate molding tube to chill the molding tube and thereby chill the cheese as it passes through the molding tube so that cheese passing out of the outlet end of the elongate molding tube may be cut to the desired size and packaged, aged, etc. The cooling mechanism forms a cooling gradient within the molding tube, such that warmer temperature coolant is used about the inlet end of the molding tube than about the outlet end. The cooling gradient is applied in such a manner to provide a more uniform cooling in the cheese, and thereby achieve a superior end product.

Abstract: A convective countercurrent heat exchanger comprises a nest of pipes (36) which is arranged in a cylindrical shell (35) and is equipped with ribbed pipes (37). The pipes through which a liquid flows are connected to a collector (33, 34). The shell is provided with a gas-inlet connection piece (31) and a gas-outlet connection piece (32). The nest of pipes (36), which is composed of a plurality of layered pipes, is mounted in a rectangular case (40). The pipes are provided in their straight parts (37) with welded-on ribs and are connected to one another by unribbed pipe bends (38). The pipe bends are accommodated in compartments (45) through which flow does not take place. The case (40) through which flow takes place opens on the outlet side (50) in a dome (51) which is delimited by the shell (35). The gas-outlet connection piece (32) is situated in the shell at that end of the annular chamber (44), enclosed by the shell and case, which is remote from the dome (51).

Abstract: A heat exchanging unit is provided that includes a closed vessel separated into first and second compartments by a vertical partition plate thereby leaving a passage above the vertical partition plate. The first compartment has a cooling medium inlet pipe connected thereto, and a through pipe, through which a fluid to be cooled is passed. The through pipe is arranged to pass through the first compartment and includes a heat exchange member placed at a location lower than the top of the vertical partition plate. The second compartment is provided with a demister, and a cooling medium gas outlet pipe connected to the demister. A cooling medium liquid outlet pipe is connected to the second compartment. The heat exchanging unit is preferably used as part of a combined heat exchanging apparatus formed by combining the heat exchanging unit with a mist processing unit, or as part of a multistage heat exchanging apparatus formed by integrating two or more of the heat exchanging units.

Abstract: The invention relates to a heat exchanger of the type which is constructed from a number of heat exchanger elements (1) consisting of a tubular jacket (2) with thermal transfer tubes (3) lying within the jacket. The heat exchanger elements (1) are joined together to form a heat exchanger, in that each end of a heat exchanger element is provided with a modular unit (4) which constitutes the frame of the heat exchanger. A jacket connection (5) is connected to each two modular units (4) and constitutes an extension of the tubular jacket (2). The jacket connection (5) is designed as an H pipe.

Abstract: A heater for physiological solutions that is effective at low and high flow rates includes first and second heat exchangers that have different fluid heating characteristics. The first heat exchanger is capable of heating solutions at high flow rates, while the second heat exchanger is designed to heat the solutions at low flow rates. A warming fluid is circulated through the heat exchangers, and a manifold is provided to control the flow of the warming fluid that is directed to the two heat exchangers. The solution to be warmed is directed to both heat exchangers such that a warmed solution is provided irrespective of the flow rates.

Abstract: A vessel-type fluid cooling system includes an upper mixing chamber and a lower holding chamber, the chambers being separated by a transverse separating wall. One or more cooling tubes extend between the mixing chamber and the holding chamber, and cooling elements, such as fluid-cooled tubes, are located within each cooling tube. A heated fluid inlet provides heated fluid to the mixing chamber, and a cooled fluid outlet discharges cooled fluid from the holding chamber. Each cooling tube includes one or more inlets toward its upper end, and fluid is supplied from the mixing through the inlets to passages defined by the cooling tubes for cooling the fluid as the fluid flows downwardly through the cooling tubes. The cooled fluid is discharged into the holding chamber.

Abstract: According to the present invention there is provided a small-sized thermosiphon free from deterioration in its cooling efficiency caused by pressure loss of a refrigerant and in which a two-phase flow of a fluid to be cooled is sure to be distributed uniformly. The thermosiphon includes a cooling cylinder 1 having a plurality of independent refrigerant tanks 2 formed by partition walls 1c which are disposed between fluid inlet port 1a and outlet port 1b inside the cylinder, and a plate fin type heat exchanger 50 extending inside the cylinder through the partition walls 1c hermetically sealably. Under this construction, it is not necessary to use pipes for the circulation of refrigerant C between the refrigerant tanks 2 and refrigerant circulation paths 54 in the heat exchanger 50, thus preventing the deterioration of the cooling efficiency caused by pressure loss of the refrigerant.

Abstract: Heat is removed from a spacecraft under zero gravity and under various accelerations, by a heat exchange contact between a cooling liquid or coolant and an evaporant or medium to be evaporated. The coolant flowing in at least one liquid cooling circulation circuit and the evaporant which is discharged in its vapor phase, are brought into heat exchange contact with each other in processing chambers forming at least two separate heat exchange stages, wherein different pressure and temperature conditions are set. The cooling liquid or coolant and the medium to be evaporated evaporant flow through these stages in sequence and in such a way that the coolant first flows through the stage with the highest pressure and the highest temperature, and then flows through the stages with successively lower pressure and/or temperature.

Abstract: An air-conditioner has a heater core in an air passage. A bypass passage is formed within the air passage and at a side portion of the heater core. A holding shaft is pivotally disposed at the boundary between an air-flow through the heater core and an air-flow through the bypass passage. A sliding shaft is disposed upstream of the heater core and slides to cross a substantially whole area of the air passage. A first end and second end of a variable length damper which varies its length are connected to the sliding shaft and the holding shaft respectively so that the variable length damper moves in such a manner that its length varies in response to a distance between the sliding shaft and the holding shaft.

Abstract: A water discharge conduit is disposed in a downwardly inclined direction for receiving a flow of waste water at an upper end, for example, from baths, showers and the like. A water trap is disposed below the conduit in parallel relation and has an intake union to receive a flow of hot waste water from the discharge conduit and a discharge union at an opposite end for discharging the waste water back into the conduit. A plurality of pipes extends through the horizontally disposed water trap for conducting fresh water therethrough in heat exchange relation with the flow of hot waste water in the water trap.

Abstract: The barrel assembly of the heat exchanger is manufactured with abutment joints between the housing and the headers thereof, and is clamped together along the axis of the assembly by a rod extending through the respective headers, and the housing, parallel to the axis, so that the housing is not vulnerable to "blowing its ends" when under pressure. The housing is also free draining at the discharge header when relieved of pressure, and this combination of features is made possible in part by the use of an insertable fluid flow cartridge for the housing which provides the tubing for one of the fluids and baffling for the other fluid when the latter fluid is circulated through the housing.

Abstract: A heat exchanger unit comprises a plurality of heat exchangers of a construction in which a number of tubes are mounted on mounting plates, which additionally serve as manifolds, in a manner such that the tubes maintained in spaced relation while being twisted such that their axes conform to parts of helices.

Abstract: A multipass heat exchanger comprising an arrangement of a plurality of heat exchanger modules, each module having a plurality of passes for passage of a first heat exchange fluid and a plurality of tubes across such passes for passage of a second heat exchange fluid. The heat exchanger modules are disposed in side-by-side relation, with each successive module adjoining the previous module in a stepped relation, the second exchanger module being positioned relative to the first module so that the first heat exchanger fluid leaving the first pass of the first heat exchanger module enters directly the second pass of the second module, and so on, in a straight through fashion, for as many passes as desired. The result is a highly efficient multipass heat exchanger of minimum weight and pressure loss in the flow path on the shell side of the exchanger, comprised of multiple heat exchanger units, with no reversal of flow in each pass in each exchanger unit.

Abstract: A central heating installation provided with a hot tap water circuit for domestic usage includes a heating apparatus having an enclosure the inner portion of which is provided with a burner, notably a gas burner, and on which is possibly wound or a heating circuit duct extending thereafter through a fin assembly situated in the upper portion of the enclosure, along the path of travel of the hot gases, the heating circuit, when extending through the fin assembly, being provided in the shape of a plurality of flattened tubes connected to one another by elbows and the hot tap water circuit being provided in the form of a tube having the shape of a hairpin or of a pipe coil and placed inside the flattened tubes where they extend through the fin assembly.

Abstract: A heat exchanger includes a plurality of in-line segments for alternately enveloping one fluid flow with another fluid flow with the fluid flow exchange occurring at the junction of adjacent segments through a geometric surface mathematically termed a complete embedded minimal surface. An encircling cylindrical shell defined in diameter by the perimeter of the junction surface forms the outer boundary of the in-line segments. The fluid flows may be in the same or opposed directions, depending upon the nature of the results sought by the heat exchanger in a specific environment.

Abstract: To permit high-temperature differential cross flow of an initially cool, heat absorbing medium and an initially hot, heat releasing medium, with temperature differences in the order of 1000.degree. and higher, and to prevent localized thermal overload, the heat exchanger is a two-stage heat exchanger, with plate packages (5, 6) which are serially passed by the media, typically gaseous media. The first package (5) forms a preheater stage and the second package (6) forms a final heater stage. Connecting ducts (9, 10) are provided and so arranged that the initially hot fluid medium is conducted through flow channels in the second heater stage which receives heat absorbing medium which has already passed through the preheater stage, so that it has already been preheated, thereby reducing the temperature difference between the preheated heat absorbing medium and the initially hot, heat releasing medium.