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EP4298393B1 - Échangeur de chaleur à plaques d'évaporation - Google Patents

Échangeur de chaleur à plaques d'évaporation Download PDF

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Publication number
EP4298393B1
EP4298393B1 EP22708898.6A EP22708898A EP4298393B1 EP 4298393 B1 EP4298393 B1 EP 4298393B1 EP 22708898 A EP22708898 A EP 22708898A EP 4298393 B1 EP4298393 B1 EP 4298393B1
Authority
EP
European Patent Office
Prior art keywords
stack
heat exchanger
gas flow
plate heat
exchanger according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22708898.6A
Other languages
German (de)
English (en)
Other versions
EP4298393C0 (fr
EP4298393A1 (fr
Inventor
Vincent TRIP
Arthur VAN DER LEE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dutch Innovation In Air Treatment BV
Original Assignee
Dutch Innovation In Air Treatment BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP4298393A1 publication Critical patent/EP4298393A1/fr
Application granted granted Critical
Publication of EP4298393C0 publication Critical patent/EP4298393C0/fr
Publication of EP4298393B1 publication Critical patent/EP4298393B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D5/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
    • F28D5/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation in which the evaporating medium flows in a continuous film or trickles freely over the conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/065—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing plate-like or laminated conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/02—Coatings; Surface treatments hydrophilic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/14—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes molded
    • F28F2255/143—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes molded injection molded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/08—Fastening; Joining by clamping or clipping
    • F28F2275/085—Fastening; Joining by clamping or clipping with snap connection

Definitions

  • the invention is directed to an evaporator plate heat exchanger comprising a stack of injected moulded frames and heat exchange sheets, wherein the stack has two ends and at least four sides.
  • the stack has alternating first and second spaces between the heat exchange sheets and a water supply and discharge fluidly connected to the first spaces.
  • EP3444550 describes a plate heat exchanger which is designed for and built by a layer-by-layer additive manufacturing process. A channel is present in the interior of the plate itself for supplying water to a space between the plates.
  • WO2018/132014 discloses a plate heat exchanger according to the preamble of claim 1.
  • US2003/0230092 describes a stack of thermoformed plastic or metal frames as part of a gas conditioning system.
  • the stack of frames has alternating first and second spaces.
  • water is sprayed in a space above the first spaces as shown in Figure 2 .
  • water is preferably supplied via an injection system.
  • a desiccant fluid is supplied via a supply through holes and lateral channels branching from the supply through holes as shown in Figure 3 .
  • the supply through holes run along the length of the stack.
  • a lateral channel is present in the frame. From this lateral channel the desiccant fluid is supplied by gravity to the second space.
  • US2003/0230092 A problem with the design of US2003/0230092 for adding water to the first spaces is its complexity. Spraying water seems like a simple solution but it includes a spraying installation and a space for accommodating such a spraying installation. Further it is found that a uniform supply of water to each first space is difficult to achieve. US2003/0230092 describes also a system to supply a desiccant fluid by a conduit system of supply through holes and lateral channels. It may be envisioned that such a system could also be used for supplying water when the stack is used as an evaporator plate heat exchanger. The problem of such a system is however the lack of an uniform supply of water to each second space because of for example the pressure gradient of the water supply in the supply through holes. Such uniform distribution may be achieved by adapting the design of each lateral channel. But this would make the design very complicated.
  • the object of the present invention is to provide an evaporator plate heat exchanger having a much simpler water supply and discharge design.
  • An evaporator plate heat exchanger comprising a water supply and a stack of injected moulded frames and heat exchange sheets, wherein the stack has two ends and at least four sides,
  • Applicant found that when a volume of water is present in the first enclosed space a uniform supply of water to all first spaces fluidly connected to said first enclosed space may be achieved.
  • the water can easily distribute itself, preferably by gravity and optionally pressure assisted, over the various first spaces. This is different from spraying or from injecting water to the first spaces.
  • the design is further simple in that the first enclosed space may be obtained when stacking the frames as will be described below or may be simply added to a stack as also described below.
  • the plate heat exchanger is preferably a so-called fixed plate heat exchanger.
  • Such fixed plate heat exchangers are commonly used to exchange heat between two gasses. Such plate heat exchangers may find use in mechanical ventilation heat recovery (MVHR).
  • the gas or gasses is in most cases air.
  • the fixed plate heat exchanger may also be used to exchange heat between air and other gasses or between two other gasses.
  • warm water may be supplied to the first enclosed space while no gas flow is not present in this first enclosed space.
  • the warm water can in that embodiment increase the temperature of a second air flow flowing in the adjoining second spaces.
  • the plate heat exchanger will then be provided with a water discharge for the warm water.
  • the water discharge may be as described further below in this application.
  • the plate heat exchanger may also be used as a humidifier to increase the humidity of a gas flowing in the first enclosed spaces. One may even envisage that for such an application no second spaces are present.
  • the heat exchanger may have a vertical flat panel design, a horizontal flat panel design or a cellular design.
  • the stack of such a plate heat exchanger has at least four headers running along the sides of the stack.
  • the first spaces in the stack may be fluidly connected to the inlet for the a gaseous medium via an opening between neighbouring frames in the stack and via a first header.
  • the first spaces in the stack are further fluidly connected to the outlet for the first gas flow via openings between neighbouring frames in the stack and via a second header.
  • the second spaces in the stack may be fluidly connected to the inlet for the second gaseous medium via openings between neighbouring frames in the stack and via a third header and the second spaces in the stack are further fluidly connected to the outlet for the second medium via openings between neighbouring frames in the stack and via a fourth header.
  • the frame and the heat exchange sheet are suitably comprised in a heat exchange plate.
  • the frames are preferably obtained by injection moulding.
  • the heat exchange plate is suitably an insert moulded work product wherein the heat exchange sheet is the insert of the insert moulded work product.
  • Such an insert moulded work product may be obtained as described in US2018/0266774 wherein the heat exchange sheet is first laid in a pre-set mould for injection moulding. After placing the sheet the frame is directly injection moulded on the heat exchange sheet to form the heat exchange plate.
  • Preferably at least two sides of the sheet are fully encapsulated by the injected material and more preferably all sides of the sheet are fully encapsulated by the injected material. This ensures an effective sealed connection between the sheet and the frame.
  • the frame further controls the shape of the sheet as it stretches the sheet into a flat surface.
  • the heat exchange sheet is an aluminium sheet.
  • two consecutive heat exchange sheets in the stack will have facing sides to first space. It is preferred that these facing sides are provided with a layer of a hydrophilic material.
  • the frame may be made of acrylonitrile butadiene styrene (ABS), Nylons (polyamides; PA), polypropylene (PP), polyethylene (PE) or polyvinyl chloride (PVC). Polypropylene has been found to be especially suited.
  • the stack comprises of alternatingly stacked first heat exchange plate and differently shaped second heat exchange plate each comprising of a heat exchange sheet.
  • the sheets may also be of the same design which may be oriented differently such to obtain the desired gas inlets and outlets for the different gas flows which exchange heat.
  • the stack of frames may comprise a differently shaped end frame at each end of the stack. These end frames preferably do not having the afore mentioned insert. Instead the end frames have a closed wall in the positioned of the insert. This wall is preferably an integral part of the stack.
  • the frame of such a fixed plate heat exchanger may have a square, rectangular, rhombic heat exchange or a hexagonal shape.
  • it has a hexagonal shape resulting in that the stack has six sides and even more preferably it has a square shape or a rectangular shape in that the stack has four sides.
  • the frames may connect to each other by any means such as an adhesive.
  • a mechanical connection is used which avoids the use of an adhesive.
  • a suitable mechanical connection is wherein the frames connect by means of a snap fit connection.
  • the frames are connected by fusion between the plastic material of the frames. Fusion may be achieved by locally increasing the temperature such that the plastic material of the frames melt and fuse at their mutual interface. This temperature increase may be obtained by locally adding a melt of a plastic material.
  • the melt of a plastic material is preferably a melt of a thermoplastic elastomer.
  • An example of a suited combination for a polypropylene frame is a melt of a Styrene Ethylene Butylene Styrene Block Copolymer.
  • the evaporator plate heat exchanger is suitably further provided with a water discharge for discharging any not evaporated water.
  • This discharge may be composed of simple openings at the lower side of the first spaces.
  • the stack further comprises a second enclosed space at the opposite side of the stack from the first enclosed space which second enclosed space is fluidly connected to the first spaces and not fluidly connected to the second spaces (14) and wherein the second enclosed space is fluidly connected to a water discharge.
  • the first and/or second enclosed space is suitably formed as a result of stacking the frames, wherein the frames have openings.
  • the frames have at least one opening which when stacked form the first enclosed space and the frames have at least one opening which when stacked form the second enclosed opening.
  • These first and second enclosed spaces run along the length of the stack. The resulting open ends of these spaces are closed by a wall at each end. This closure may be achieved by the afore mentioned end frames.
  • the first and second enclosed space may also be a box shaped part having an open side.
  • This box shaped part is suitably fixed to a first side of the stack such that the open side of the box shaped part faces the first side of the stack to obtain the first enclosed space.
  • Another box shaped part is suitably fixed to a third side of the stack such that the open side of the box shaped part faces the third side of the stack to obtain the second enclosed space.
  • the box shaped parts are connected to the stack such that a water tight enclosure is obtained.
  • the box shaped part may have rounded corners and the like.
  • the first and second enclosed space as described above may have the same design and shape or may be differently shaped.
  • the first enclosed space may be larger or smaller in volume than the second enclosed space. It is also possible that a combination of a space as formed as a result of stacking is combined with a space as formed as a result of adding a box shaped part is part of the heat exchanger.
  • water will flow from the first enclosed space, preferably by means of gravity, to the first spaces of the stack.
  • all or part of the water evaporates. Any non evaporated water is discharged from the first spaces of the stack to the second enclosed space, preferably by means of gravity.
  • the stack will be positioned horizontally such that the first enclosed space is positioned on or at the top of the stack and the second enclosed space is positioned below or at the bottom of the stack.
  • a volume of water will be present in the first enclosed space. This volume of water will be maintained by supplying fresh water via the water supply to compensate for the water supplied to the first spaces.
  • openings may be multiple channels or an elongated and parallel opening per first space.
  • the opening from the first enclosed space to the first spaces is a slit or a row of smaller openings running above substantially the entire width of the sheet as present in the frame. In this way a large area of the sheet will wetted and used in the evaporative cooling process.
  • One elongated opening or slit connects the first enclosed space with one first space.
  • Such a slit may be formed when stacking the frames. By using differently designed frames one may achieve a stack of frames where the first enclosed space is fluidly connected to the first spaces and not to the second spaces in the stack. The driving force for the water to flow through these openings to the first spaces will be the water column in the first enclosed space.
  • This driving force may sufficiently be increased by purposely increasing the water pressure in the first enclosed space, for example by means of a pump.
  • the invention is thus also directed to the use of an evaporator plate heat exchanger according to this invention wherein the first enclosed space contains pressurised water.
  • the openings are preferably designed such that at a given water pressure a known amount of water flows into each first space.
  • the opening or openings between the first space and this second enclosed space are preferably designed such that the water easily flow to said second enclosed space.
  • the opening may for example be a single opening at the lower end of a tilted bottom of the first space
  • This water is discharged from this space via the water discharge.
  • the discharge may be enhanced by for example a pump.
  • the collected water may be recycled to the first space.
  • Water may be continuously or intermittently provided to the first enclosed space. Intermittent supply is for example possible when the sheet is provided with a hydrophilic material.
  • the evaporator plate heat exchanger preferably comprises multiple stacks of interconnected injected moulded frames. Each stack is provided with its own first and second enclosed space. These first and second enclosed spaces are not fluidly connected in that they have their own water supply and water discharge. It is found that the stacks having preferably between 15 and 50 interconnected frames, including the end frames, can be simply manufactured on a large scale. By combining stacks having the same number of interconnected injected moulded frames it is possible to modularly assemble different sized heat exchangers. This allows one to make differently sized plate heat exchangers with a single design of the stack. The supply and discharge of water to the first enclosed spaces and from the second enclosed spaces of the separate stacks may be supplied from a single source and may be combined.
  • the frame for such a modular design preferably has a square shape or a rectangular shape resulting in a box shaped stack.
  • the more than one stacks are suitably positioned in line such that the respective first sides and second sides of the stacks are in line and wherein a third side of the stack is connected to an inlet for a first gas flow and an outlet for a second gas flow and wherein a fourth side of the stack is connected to an inlet for the second gas flow and an outlet for the first gas flow.
  • the inlet for a first gas flow comprises of a header which is in fluid communication with the first spaces of more than one stacks which are positioned in line.
  • the inlet for a second gas flow comprises of a header which is in fluid communication with the second spaces of the more than one stacks which are positioned in line.
  • the inlet for a second gas flow comprises of a header which is in fluid communication with the second spaces of the more than one stacks which are positioned in line.
  • the outlet for a second gas flow comprises of a header which is in fluid communication with the second spaces of the more than one stacks which are positioned in line.
  • FIG 1 shows an expanded stack (4) of injected moulded frames (5) provided with insert moulded heat exchange sheets (6).
  • the frames (5) are connected to form a stack (4) oriented in its preferred horizontal direction.
  • the frames (5) are provided with openings (17) which will form the first and second enclosed spaces (15,16) when the frames (5) are stacked and connected.
  • At both ends of the stack end frames (2a,2b) are provided which do not have these openings (17) and therefore enclose the first and second enclosed spaces at these ends of the stack (4).
  • first (13) and second (14) spaces are formed as shown in Figure 2 .
  • the first spaces (13) are open at a upper part of side (10) and the second spaces (14) are open in a lower part of side (10).
  • the dimensions in Figure 2 of the thickness of a frame (5) is drawn not to scale such to more clearly illustrate the positioning of the openings in side wall (10).
  • the frames (5) are suitably of alternating different designs.
  • first heat exchange plate (16a) and differently shaped second heat exchange plate (16b) are shown in Figure 3 each comprising of a heat exchange sheet (6).
  • first and second enclosed spaces (15,16) are connected to the first space (13) by channels (20a,20b).
  • the frames (16a, 16b) are shown with reference numbers (9,10,11,12) to show which side of the frames correspond with the side of the stack (4). Ridges (12a) and (10a) are present to connect to a header as shown in Figure 11 .
  • a water supply (1) and a water discharge (2) is drawn as conduits connected to enclosed first and second enclosed spaces (15,16) respectively.
  • the first enclosed space (15) is fluidly connected to water supply (1) and the second enclosed space (16) is fluidly connected to water discharge (2).
  • These fluid connections may be made by drilling a hole in a connected stack of frames from sides (9) and (11) until the enclosed spaces are reached.
  • Figure 4 shows the exterior of a stack (4) of interconnected frames (5) to which stack a box shaped part (18) is added to form the first enclosed space (15) at the upper side (9) of the stack.
  • the open side of the box shaped part (18) faces side (9) of the stack (4).
  • a box shaped part (19) is added to form the second enclosed space (16) at the lower side (11) of the stack (4).
  • the open side of the box shaped part (19) faces side (11) of the stack (4).
  • the shape of the box shaped part may in fact be any shape which has an open side suited to be connected to the sides of the stack.
  • Figure 5 shows a cross-sectional view AA' of Figure 4 in a first space (13).
  • a frame (5) with an insert moulded heat exchange sheet (6) is shown.
  • In the box shaped part (18) is shown above a slit like opening (20) to the first space (13). Further a slit like opening (20c) is shown to connect first space (13) with second enclosed space (16).
  • Figure 6 shows in a simplified manner how the stacks of Figures 1-5 may be combined with headers.
  • a stack (4) is shown from one end (7).
  • a third gas flow header (24) is shown for supplying a first gas flow (solid line) to the first spaces (13).
  • a first gas flow header (26) is shown for supplying a second gas flow (dotted line) to the second spaces (14).
  • a fourth gas flow header (27) is shown for collecting gas from the first spaces (13).
  • a second gas flow header (25) is shown collecting gas from the second spaces (14).
  • Figure 7 shows three stacks (21,22,23) of square frames (5) wherein the stacks (21,22,23) have the same dimensions.
  • the stacks (21,22,23) are positioned in line such that the respective sides (9,10,11,12) are in line.
  • the closed end frames of one stack (21) thus faces the closed end frame of the next stack (21a) in the row of stacks.
  • the first enclosed spaces and second enclosed spaces of the four stacks (21,21a, 22,23) are separate spaces and thus not connected to form a single space.
  • Sides (10) and (12) of all stacks (21, 21a, 22,23) are provided with headers (24,25,26,27) as shown in Figure 6 .
  • Each header is, in contrast with the stacks (21,21a,22,23), comprised of a common space which allows for example to supply the first gas flow (shown as the solid line in Figures 6 and 7 ) to the separate first spaces of the three stacks (21,21a,22,23) from a common header (26) as in Figure 6 .
  • such a header is comprised of interconnected modular elements (28) of the same size and shape. In this way one can easily assemble different sized headers when combining different numbers of such standardised stacks (21,21a,22,23). In this figure one header is obtained by combining four modular elements (28). It is also possible that per stack length more modular elements are used such that along side (10) of one stack (21) 2 to 4 modular elements are present. Such modular elements (28) suitably also allow that headers (24) and header (25) are connected and that header (26) and header (27) are connected to the stack. For example by ridges (10a, 12a) of Figure 3a and 3b . Headers (24) and (25) may be fluidly connected and disconnected by means of a valve . This makes the illustrated plate heat exchangers especially suited to be used in the process described in WO2016/206714 .
  • Figure 8 shows a modular element (28) which may be used as part of the headers shown in Figures 6 and 7 .
  • the modular element (28) is suitably a hollow cube shaped gas flow element (30) as shown in this figure.
  • the gas flow element (30) has an interior space (34), six open faces (35), eight vertices (36) and twelve edges (37) interconnecting the eight vertices (36).
  • Figure 9 shows a connecting frame (38) provided with an opening (39) and four edges (40). Along the edges (40) extrusions are seen directed in both directions perpendicular to the plane of the frame. These extrusions are suitably cantilever snap-fit connections (41) which can connect to an edge (37) of the gas flow element (30) as seen in Figure 3 .
  • Figure 10 shows a detail of a modular member of Figure 8 at one of its vertices (36) wherein one open face is provided with a connecting frame (38) and a neighbouring open face is provided with an enclosing wall element (45).
  • Both the connecting frame (38) as the enclosing wall element (45) are provided with numerous protrusions (46) in a perpendicular direction with respect to the plane of the connecting frame (38) or plane of the enclosing wall element (45).
  • the protrusions (46) are provided with a sharp edge (47) at its end which are dimensioned such that they form a cantilever snap fit connection with the edge (37).
  • the location of the protrusions (46) of the connecting frame (38) and the enclosing wall element (45) are not at the same positions along the edges of these elements. This makes it possible that neighbouring open faces of a modular member can be provided with connecting frames (38), enclosing wall elements (45) or other elements by a snap fit connection on its common edge (37).
  • the modular element is a hollow cuboid shaped gas flow element, each gas flow element having an interior space, six open faces, eight vertices and twelve edges interconnecting the eight vertices,
  • the hollow cuboid shaped gas flow elements of one header are connected to the hollow cuboid shaped gas flow elements of the other header.
  • a row of multiple gas flow elements are connected to a row of stacks or to another row of gas flow elements it may happen that because of manufacturing tolerances no connection is possible. This may be mitigated by using a gas tight bellow between one or more of the stacks and/or between one or more of the gas flow elements which bellows allows a varying distance between the stacks and/or gas flow elements.
  • the hollow cuboid shaped gas flow elements of one header are connected to the hollow cuboid shaped gas flow elements of the other header and wherein in the connection between the two headers valves may be present allowing to fluidly connect and disconnect the connected headers.
  • Such a connected header is shown in Figure 11 showing a header (26) composed of five fluidly interconnected gas flow elements (30) and a header (27) composed of five fluidly interconnected gas flow elements (30).
  • the header (26) and (27) are open to the viewer and closed at its not visible back wall. The open side will be connected to side (12) of the stack (4) or stacks (4).
  • the headers (26,27) are connected to a gas inlet flow element (42) and a gas outlet element (43) which may be connected to gas supply conduit and gas discharge conduit.
  • a motor (45) may operate a valve (46) to cut off the gas supply from gas inlet flow element (42).
  • a motor (47) may operate valves (48) fluidly connecting and disconnecting header (26) and header (27)
  • the hollow cuboid shaped gas flow element is suitably made of a polymer.
  • the hollow cuboid shaped gas flow element is a single injected moulded work product.
  • the connecting frame is also preferably made of a polymer and is preferably a single injected moulded work product.
  • the dimensions of the hollow cuboid shaped gas flow element may vary. When they are used in combination with a plate heat exchanger it is preferred to use elements having a minimal dimension of an edge of 0.1 m and a maximum dimension for an edge of 0.3 m being the distance along the edge between two vertices.
  • the hollow cuboid shaped gas flow element, the connecting frame, the rectangular shaped frame and/or the rectangular shaped closed frame may be made of a polymer.
  • a polymer which may be used in injection moulding Preferably a polymer which may be used in injection moulding. Suitable polymers are polypropylene (PP) and/or polyoxymethylene (POM).
  • the connecting frame preferably has about the same dimensions as the sides of the hollow cuboid shaped gas flow element.
  • the connecting frame is either closed to provide for the partition or provided with an opening at its centre to allow a fluid communication between the first and second hollow cuboid shaped gas flow element.
  • This open space is preferably about the same shape as the open face of the hollow cuboid shaped gas flow element.
  • the remaining edges of the frame are provided with the means to connect to the four edges of the open face of the first gas flow element and provided with connecting means to connect to the four edges of the open face of the second hollow cuboid shaped gas flow element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Details Of Fluid Heaters (AREA)

Claims (20)

  1. Échangeur de chaleur à plaques pour évaporateur comprenant un empilement (4) de cadres moulés par injection (5) et de feuilles d'échange thermique (6), l'empilement ayant deux extrémités (7,8) et au moins quatre côtés (9,10,11,12),
    dans lequel l'empilement (4) présente une alternance de premiers (13) et de seconds (14) espaces entre les feuilles d'échange thermique (6),
    caractérisé en ce que l'évaporateur comprend en outre une alimentation en eau (1) et en ce que
    l'empilement (4) comprend en outre un premier espace clos (15) sur un côté de l'empilement (4) qui est connecté de manière fluide aux premiers espaces (13) et n'est pas connecté de manière fluide aux seconds espaces (14) et
    dans lequel le premier espace clos (15) est connecté de manière fluide à l'alimentation en eau (1).
  2. Échangeur de chaleur à plaques pour évaporateur selon la revendication 1, dans lequel l'empilement (4) comprend en outre un second espace clos (16) du côté opposé de l'empilement, qui est connecté de manière fluide aux premiers espaces (13) et non connecté de manière fluide aux seconds espaces (14), et dans lequel le second espace clos (13) est connecté de manière fluide à une évacuation d'eau (2).
  3. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 ou 2, dans lequel le cadre (5) et la feuille d'échange thermique (6) sont compris dans une plaque d'échange thermique (16) et dans lequel la plaque d'échange thermique (16) est un produit moulé par insertion dans lequel la feuille d'échange thermique (6) est l'insert du produit moulé par insertion.
  4. Échangeur de chaleur à plaques pour évaporateur selon la revendication 3, dans lequel l'empilement (4) comprend une première plaque d'échange thermique (16a) empilée en alternance et une seconde plaque d'échange thermique (16b) de forme différente.
  5. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 4, dans lequel le premier et/ou le second espace clos facultatif est formé par des ouvertures (17) dans les cadres moulés par injection (5) et dans lequel les deux extrémités ouvertes résultantes sont fermées par une paroi comme dans les cadres à extrémités fermées (2a, 2b).
  6. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 5, dans lequel le premier espace clos (15) est formé par une pièce en forme de boîte (18) ayant un côté ouvert et dans lequel la pièce en forme de boîte (18) est fixée au premier côté (9) de l'empilement (4) de sorte que le côté ouvert fait face au premier côté (9) de l'empilement et/ou dans lequel le second espace clos optionnel (13) est formé par une pièce en forme de boîte (19) ayant un côté ouvert et dans lequel la pièce en forme de boîte (19) est fixée au troisième côté (11) de l'empilement (4) de sorte que le côté ouvert fait face au troisième côté (11) de l'empilement (4).
  7. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 6, dans lequel le premier espace clos (15) est connecté de manière fluide aux premiers espaces (13) au moyen d'ouvertures allongées et parallèles (20) ou de rangées parallèles d'ouvertures de plus petite taille.
  8. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 7, dans lequel la feuille d'échange thermique est une feuille d'aluminium.
  9. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 8, dans lequel deux feuilles d'échange thermique consécutives de l'empilement ont des faces tournées vers le premier espace et dans lequel les faces tournées sont pourvues d'une couche d'un matériau hydrophile.
  10. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 9, dans lequel le cadre (5) de la plaque d'échange thermique (16) est en acrylonitrile butadiène styrène (ABS), nylons (polyamides) ; PA), polypropylène (PP), polyéthylène (PE) ou polychlorure de vinyle (PVC).
  11. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 10, dans lequel le cadre (5) a une forme carrée ou rectangulaire.
  12. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 11, comprenant plusieurs empilements (21, 21a, 22, 23) de cadres moulés par injection interconnectés, chaque pile étant pourvue de cadres d'extrémité clos.
  13. Échangeur de chaleur à plaques pour évaporateur selon la revendication 12, dans lequel les empilements (21, 22, 23) ont le même nombre de cadres moulés par injection interconnectés (5).
  14. Échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 13, dans lequel le nombre de cadres interconnectés (5) est compris entre 15 et 50.
  15. Échangeur de chaleur à plaques pour évaporateur selon la revendication 14, dans lequel le cadre (5) a une forme carrée ou rectangulaire résultant en un empilement en forme de boîte (21, 21a, 22, 23) et dans lequel les empilements (21, 21a, 22, 23) sont positionnées en ligne de telle sorte que leurs côtés respectifs (9,10,11,12) soient alignés et dans lequel un deuxième côté (10) de l'empilement est connecté à un collecteur (24) pour un premier flux de gaz et connecté à un collecteur (25) pour un second flux de gaz et dans lequel un quatrième côté (12) de l'empilement est connecté à un collecteur (26) pour le second flux de gaz et à un collecteur (27) pour le premier flux de gaz.
  16. Échangeur de chaleur à plaques pour évaporateur selon la revendication 15, dans lequel les collecteurs (24, 25, 26, 27) sont constitués d'éléments modulaires interconnectés (28) de même taille et de même forme.
  17. Échangeur de chaleur à plaques pour évaporateur selon la revendication 16, dans lequel l'élément modulaire (28) est un élément de flux de gaz (30) de forme cubique creuse, chaque élément de flux de gaz (30) ayant un espace intérieur (34), six faces ouvertes (35), huit sommets (36) et douze arêtes (37) reliant les huit sommets (36),
    dans lequel les quatre bords (37) d'au moins une face ouverte (35) d'un premier élément d'écoulement de gaz (30) d'un collecteur (24, 25, 26, 27) sont connectés de manière étanche au gaz aux quatre bords (37) d'une face ouverte (35) d'un second élément d'écoulement de gaz de forme cubique creuse (30) du même collecteur au niveau de leurs faces ouvertes de connexion respectives (35) et,
    dans lequel, au niveau de leurs faces ouvertes de connexion respectives (35), les quatre bords (37) de la face ouverte (35) du premier élément d'écoulement de gaz (30) sont connectés de manière étanche au gaz aux quatre bords (37) de la face ouverte (35) du second élément d'écoulement de gaz de forme cubique creuse (30) au moyen d'un cadre de connexion (38),
    dans lequel le cadre de connexion (38) est doté de moyens de connexion aux quatre bords de la face ouverte du premier élément d'écoulement de gaz (30) et est doté de moyens de connexion aux quatre bords (37) de la face ouverte (35) du second élément d'écoulement de gaz de forme cubique creuse (30).
  18. Échangeur de chaleur à plaques pour évaporateur selon la revendication 17, dans lequel, d'un côté de l'empilement ou des empilements (4), les éléments d'écoulement de gaz creux de forme cubique (30) d'un collecteur (24, 25, 26, 27) sont connectés aux éléments d'écoulement de gaz creux de forme cubique (30) de l'autre collecteur (24, 25, 26, 27).
  19. Échangeur de chaleur à plaques pour évaporateur selon la revendication 18, dans lequel les éléments d'écoulement de gaz creux de forme cubique (30) d'un collecteur (24, 25, 26, 27) sont connectés aux éléments d'écoulement de gaz creux de forme cubique (30) de l'autre collecteur (24, 25, 26, 27) et dans lequel des vannes (48) sont présentes dans la connexion entre les deux collecteurs, permettant de connecter et de déconnecter de manière fluide les collecteurs connectés (24, 25, 26, 27).
  20. Utilisation d'un échangeur de chaleur à plaques pour évaporateur selon l'une quelconque des revendications 1 à 19, dans lequel le premier espace clos contient de l'eau sous pression.
EP22708898.6A 2021-02-25 2022-02-24 Échangeur de chaleur à plaques d'évaporation Active EP4298393B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2027648A NL2027648B1 (en) 2021-02-25 2021-02-25 An evaporator plate heat exchanger
PCT/EP2022/054625 WO2022180149A1 (fr) 2021-02-25 2022-02-24 Échangeur de chaleur à plaques d'évaporation

Publications (3)

Publication Number Publication Date
EP4298393A1 EP4298393A1 (fr) 2024-01-03
EP4298393C0 EP4298393C0 (fr) 2024-09-11
EP4298393B1 true EP4298393B1 (fr) 2024-09-11

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Application Number Title Priority Date Filing Date
EP22708898.6A Active EP4298393B1 (fr) 2021-02-25 2022-02-24 Échangeur de chaleur à plaques d'évaporation

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US (1) US20240125557A1 (fr)
EP (1) EP4298393B1 (fr)
JP (1) JP2024509103A (fr)
KR (1) KR20230148153A (fr)
CN (1) CN116868021A (fr)
AU (1) AU2022225636A1 (fr)
CA (1) CA3208925A1 (fr)
ES (1) ES2989084T3 (fr)
IL (1) IL305096A (fr)
MX (1) MX2023009181A (fr)
NL (1) NL2027648B1 (fr)
PL (1) PL4298393T3 (fr)
SA (1) SA523450355B1 (fr)
WO (1) WO2022180149A1 (fr)
ZA (1) ZA202307309B (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3356741B1 (fr) * 2016-01-29 2022-03-23 Menerga GmbH Appareil de climatisation muni d'un échangeur de chaleur à plaques air/air

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2131392A1 (fr) * 1992-03-12 1993-09-16 John Francis Urch Echangeur de chaleur a chicanes moulees
US6848265B2 (en) 2002-04-24 2005-02-01 Ail Research, Inc. Air conditioning system
JP4816517B2 (ja) * 2006-09-28 2011-11-16 パナソニック株式会社 熱交換素子
US10648682B2 (en) 2015-06-22 2020-05-12 Dutch Innovation In Air Treatment Bv Building provided with an air treatment system
CN105241296B (zh) 2015-09-25 2018-09-14 森德(中国)暖通设备有限公司 热交换器
NL2018175B1 (nl) * 2017-01-16 2018-07-26 Recair Holding B V Recuperator
US10508864B2 (en) 2017-08-14 2019-12-17 Hamilton Sundstrand Corporation Evaporative cooling in additive manufactured heat exchangers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3356741B1 (fr) * 2016-01-29 2022-03-23 Menerga GmbH Appareil de climatisation muni d'un échangeur de chaleur à plaques air/air

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ES2989084T3 (es) 2024-11-25
CA3208925A1 (fr) 2022-09-01
AU2022225636A9 (en) 2024-09-19
MX2023009181A (es) 2023-10-27
JP2024509103A (ja) 2024-02-29
NL2027648B1 (en) 2022-09-20
IL305096A (en) 2023-10-01
EP4298393C0 (fr) 2024-09-11
CN116868021A (zh) 2023-10-10
KR20230148153A (ko) 2023-10-24
AU2022225636A1 (en) 2023-08-10
US20240125557A1 (en) 2024-04-18
WO2022180149A1 (fr) 2022-09-01
PL4298393T3 (pl) 2025-02-10
EP4298393A1 (fr) 2024-01-03
NL2027648A (en) 2022-09-20
ZA202307309B (en) 2024-11-27
SA523450355B1 (ar) 2024-08-06

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