EP2504652B1 - A method of producing multiple channels for use in a device for exchange of solutes or heat between fluid flows and respective device - Google Patents

A method of producing multiple channels for use in a device for exchange of solutes or heat between fluid flows and respective device Download PDF

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Publication number
EP2504652B1
EP2504652B1 EP10798202.7A EP10798202A EP2504652B1 EP 2504652 B1 EP2504652 B1 EP 2504652B1 EP 10798202 A EP10798202 A EP 10798202A EP 2504652 B1 EP2504652 B1 EP 2504652B1
Authority
EP
European Patent Office
Prior art keywords
sheet
channels
sheets
end portion
profiled
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.)
Not-in-force
Application number
EP10798202.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2504652A2 (en
Inventor
Johan Siverklev
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.)
Air to Air Sweden AB
Original Assignee
Air to Air Sweden AB
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
Priority claimed from SE0950889A external-priority patent/SE534985C2/sv
Priority claimed from US12/624,612 external-priority patent/US20110120934A1/en
Application filed by Air to Air Sweden AB filed Critical Air to Air Sweden AB
Priority to SI201031847T priority Critical patent/SI2504652T1/sl
Publication of EP2504652A2 publication Critical patent/EP2504652A2/en
Application granted granted Critical
Publication of EP2504652B1 publication Critical patent/EP2504652B1/en
Not-in-force legal-status Critical Current
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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0015—Heat and mass exchangers, e.g. with permeable walls
    • 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
    • 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
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/04—Coatings; Surface treatments hydrophobic

Definitions

  • the present invention relates generally to exchange of solutes or heat between fluid flows, and more specifically to a method of producing multiple channels for use in a device for exchange of solutes or heat between fluid flows.
  • the invention further relates to a device for exchange of solutes between at least two fluid flows.
  • HVAC Heating, Ventilation and Air Conditioning
  • water vapour can be removed from a gas stream in order to reduce power consumption by reduced condensation in a cooler unit or to recycle energy from exhaust air in e.g. a building.
  • reverse osmosis for desalinating water.
  • the spacers also raise the total weight of the exchanger. Due to the weight, more supports are needed when mounted, and increased weight also increases risks due to handling during maintenance. Also the costs for transportation increase with heavy weight.
  • Tubes in a bundle are usually used in conjunction with another fluid stream that goes in counter- or cross-current to the tubes, but on the outside, between the many tubes.
  • production cost will become high since small tubes are technically complicated to manufacture and refine into a product, and, as a consequence, the final product will become expensive.
  • Another drawback is when tubes are packed into a bundle; in current contemporary products, no satisfactory space allowance is provided for the flow characteristics in between the tubes.
  • DE 20 44 817 A1 discloses a process for preparing plate heat exchangers by means of welding.
  • the sheets have different lateral end extensions to provide an alternating channel pattern in cross-section.
  • FR 1 389 144 A discloses a heat exchanger designed to ensure exchange between two fluid flows.
  • the heat exchanger includes a plurality of elements whose walls define the passages for two fluids involved in the heat exchange. At their longitudinal ends, the elements have sloping surfaces in between the channels, extending to about half of the element height.
  • the present invention relates to a method of producing multiple channels for use in a device for exchange of solutes between at least two fluid flows overcoming the disadvantages and drawbacks mentioned above.
  • a first and a second sheet are comprised in the device.
  • the method comprises the steps of providing at least one of the first and second sheets with at least one profiled surface, and joining the first and second sheets together. Thereby, channels are formed by the shape of the profiled surface.
  • the present invention provides a method according to claim 1. This method enables the production of multiple channels for use in a device for the exchange of solutes or heat.
  • a device for exchanging solutes or heat between at least a first and a second fluid flow according to claim 3 is provided.
  • Some embodiments of the present invention are particularly useful for exchanging a substance from a first fluid flow to a second fluid flow, in order to remove or separate the substance from the first fluid flow.
  • the sheets may be provided with profiled surfaces mirrored to each other.
  • the cross section of the channels may vary along the length of the device.
  • the number of the channels along the length of the device may vary.
  • the device may further comprise a plurality of sheets stacked in multiple layers.
  • the sheet material may have a high solubility to water.
  • the sheet material may have a pore size between 0.1-50 nanometers.
  • the sheet material may have a pore size of 50-500 nanometers.
  • At least one of the sheets may be hydrophobic.
  • At least one of the sheets may be hydrophilic.
  • At least one of the sheets may be a metal.
  • the invention according to the appended claims provides the following advantages:
  • the high exchange surface area provided by a multitude of channels, coupled with good flow characteristics between layers provides an ideal situation for diffusion transfer or heat transfer between fluid streams.
  • the present design allows for any distance between layers according to needs.
  • the flow characteristics between layers can also be adjusted by increasing the distance between layers or staggering the layer layout.
  • a further advantage is, for example in the case that a fluid is to be dried, that a larger stream of air may be flowing outside the channels, or between layers in the embodiments provided with more than one layer, whereby the fluid inside the channels is more effectively dried.
  • a larger stream of air may be flowing outside the channels, or between layers in the embodiments provided with more than one layer, whereby the fluid inside the channels is more effectively dried.
  • the amount of flow between layers may be optimised for the application.
  • the present invention provides a device allowing for a counter current design with a tight configuration and no need for separate spacer material to allow flow across the sheets. Further, the device provides exceptionally good flow characteristics between layers due to its design with multiple channels and stacked layer design with adjustable distance between layers. Also, the integrated channels provide low maintenance and low risk of tear since there is no wear due to vibrations of the sheets against support structures.
  • the device is cheap to manufacture with automatic separation of individual channels and with good and independently adjustable outside flow characteristics.
  • the present invention provides a device for solute exchange that eliminates the need for additional support structures between sheets while at the same time providing a means for counter current flow, which improves the efficiency significantly compared to conventional technology.
  • Fig 1 shows a device for exchange of water vapour according to prior art.
  • a corrugated material or a flow distribution member is used between plain sheets of permeable material to define channels and flow direction and to provide a uniform spacer for separating layers.
  • the sides of the sheets are turned down to provide spacers. This design is always limited to a cross flow configuration.
  • Fig 2 shows a sheet 3 with a profiled surface 5.
  • the sheet can be a corrugated plate.
  • a sheet of a material can be heated to a degree where it is deformable and then cooled after shaping it over a mould/body and thereby letting the shape set. Once deformed permanently, the shape will stay. Another way is to let a lot of extremely thin threads fall randomly over a mould/body e.g. through electro spinning, to produce a shape that, once it sets, keeps its shape even when deformed.
  • Yet another way to create the shape of the profiled surface 5 is to cut channels with favourable flow patterns into one side, or both sides, of a sheet of a solid or porous material.
  • the material of the sheets 3, 4 may be semi permeable, or permeable to certain substances or solutes.
  • the material of the sheets may be either porous or solid or both.
  • the methods described above are especially suitable when the dimension of the channels 1 is small. With those methods small channels with a cross section of only a few millimetres may be produced easily and cost efficiently.
  • the shape of the profiled surface, and thus the cross section of the channels formed by the surfaces, may vary, depending on desired flow characteristics.
  • the cross section of the channels may for example be circular, hexagonal, square or triangular.
  • a first and a second fluid may flow counter-current to each other, inside and outside of the channel 1 respectively.
  • the fluids in the channels may be a gas or a liquid.
  • Fig 3 shows another sheet 3 with a profiled surface 5 according to one embodiment of the invention.
  • the sheet is further provided with openings to facilitate flow between layers 7 when a plurality of sheets are joined together in multiple layers 7.
  • Fig. 4 show two sheets 3, 4 with profiled surfaces 5 joined together.
  • a sheet of a base material with a profiled surface 5, for example as shown in Fig. 1
  • Joining the sheets 3, 4 together may be achieved by for example welding, gluing or fusing, or any other suitable adhesive process that would join the two profiled plates hermetically together.
  • the sheets 3, 4 are provided with a profiled surface 5 whereby channels 1 with circular cross-sections are achieved.
  • the channels 1 may have any other suitable shape, for example oval, hexagon or square.
  • Fig. 5 shows a plurality of sheets 3, 4 joined together.
  • the sheets 3, 4 When stacked, as shown in the figure, the sheets 3, 4 form multiple layers 7. Such a configuration results in a low pressure drop when fluids flow from one side to the other, thereby securing and maintaining the flow characteristics of the channels and an unobstructed fluid flow between the layers 7, outside the channels 1.
  • Fig. 6 and 7 show sheets 3 with alternative profiled surfaces 5.
  • Fig. 8 shows a plurality of sheets 3, 4 joined together in multiple layers 7.
  • the layers 7 are displaced in relation to each other whereby a device with plurality of layers 7 with a staggered configuration is provided.
  • a staggered formation reduces distance between layers 7 and thus increases the total surface area per volume unit of the configuration, and the unit can thus be made more compact while maintaining the same surface area.
  • Fig. 9 shows two sheets with profiled surfaces joined together.
  • Fig. 10 shows one sheet 3 with profiled surfaces 5 joined together with a sheet with a smooth surface. Thereby, channels 1 showing a half-circular cross-section is provided.
  • Fig. 11 shows a sheet with an alternative profiled surface 5.
  • the sheet is also provided with a plurality of openings 6 to facilitate flow between layers 7 when a plurality of sheets 3, 4 are joined together in multiple layers 7.
  • openings can be cut between the channels. This provides entry channels perpendicular to the main direction of the channels, thereby separating the flow outside the channels, or, in the case of multiple layers, between layers, from the entry point of the flow inside the channels. If the configuration of multiple layers 7 is staggered, the same method may be used for a diagonal channel, perpendicular to the channels to feed the flow between layers 7.
  • the profiled surfaces 5 may be formed by any suitable method, for example by heating the sheets, deforming them whereby the surfaces are profiled, and then cooling them whereby the shape of the profiled surfaces stay in their deformed shape. Another example is letting a plurality of thin threads fall randomly over a body with a profiled surface, whereby a sheet with a profiled surface 5 is created that, once set, will keep its shape. Further alternative may be cutting channels into one side, or both sides, of a first and a second sheet of a solid or porous material. Yet further the profiled surface may be provided by applying a pattern of a plastic or other suitable material on sheets.
  • openings 6 can be cut between the channels 1 in order to provide an inlet that distributes flow from a direction perpendicular to the channels 1, in between layers 7. This provides unobstructed flow perpendicular to the main direction of the channels, thereby separating the flow between the channels from the entry point of the flow inside the channels. If the configuration of layers 7 is staggered, the same method may be used for a diagonal channel, perpendicular to the channels to feed the flow between layers 7.
  • openings 6 can be cut either between the ends of the channels (primarily for flow distribution), or in intervals along the whole length of the channels, providing a simple means for pressure equalization and easy flow path.
  • uniformly spaced openings can be cut between channels to provide for an unobstructed flow between channels between channels from two directions (top to bottom or side to side), both perpendicular to the main direction of flow inside the channels.
  • a material with high heat conductivity may typically be used.
  • Such materials include metals such as aluminium and stainless steel, or thermoplastics such as polypropylene or polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • a permeable or semi-permeable material as described hereabove may be utilized.
  • Fig. 12 a shows a perspective of a sheet 10 according to an example of the present invention.
  • the sheet 10 may be manufactured in any way as already described above.
  • the sheet may be used in either moisture exchange applications, for exchange of solutes or alternatively, in heat exchange applications. As mentioned above, the particular application depends on the material of the sheet 10.
  • the sheet 10 has a first end 10-1 and a second end 10-2 opposite the first end 10-1.
  • the sheet 10 has a plurality of channels 12 presenting a profiled surface of the sheet 10.
  • the sheet 10 further has a first lateral portion 14-1 and a second lateral portion 14-1 opposite the first lateral portion 14-1.
  • the first lateral portion 14-1 and the second lateral portion 14-2 form outer boundaries of the sheet 10 in the longitudinal direction thereof.
  • Sheets 10 may pairwise be joined together with corresponding channels 12 facing each other, wherein corresponding channels 12 thereby form closed channels or tubes.
  • Sheets 10 may pairwise be assembled to form a stacked sheet assembly 16, as shown in Fig. 12b and schematically shown in Fig. 15 .
  • the stacked sheet assembly forms multiple channels 12 through which a first fluid may flow.
  • a second fluid may flow.
  • the second fluid is typically provided into the stacked sheet assembly 16 from a side defined by the first lateral portion 14-1.
  • the second fluid flow typically exits the stacked sheet assembly 16 from a side defined by the second lateral portion 14-2. While the second fluid is flowing through the stacked sheet assembly 16, it may flow both parallel with the channels 12, and perpendicular to the channels 12.
  • the flow direction is typically in a direction opposite the flow direction of the first fluid which flows through the channels 12.
  • the fluid flow of the first and the second fluids may also be in the same direction in some applications.
  • the first lateral portion 14-1 and the second lateral portion 14-2 present substantially planar surfaces.
  • the first lateral portion 14-1 may have a greater lateral extension d 1 from an outmost channel 12 from which it extends, compared to a lateral extension d 2 of the second lateral portion 14-1 with respect to the extension of the second lateral portion 14-2 from an outmost channel 12 from which it extends, as shown in Fig. 15 .
  • pairs of joined sheets 10 may be stacked such that the channels 12 for each pair of sheet is arranged in an alternating manner. This way, every second layer of sheet pairs have their channels in mutual planes. Thereby, fluid flow may pass between each pair of sheet 10 in a direction from the first lateral portion 14-1 to the second lateral portion 14-2.
  • the sheet 10 shown in Fig. 12a has a first end portion 11-1 at its first end 10-1.
  • the sheet 10 has a second end portion 11-2 at its second end 10-2.
  • the first end portion 11-1 and second end portion 11-2 have a plurality of sloping intermediate surfaces 13.
  • a sloping intermediate surface 13 is provided between each adjacent channel 12.
  • the sloping intermediate surfaces 13 are substantially level with an outer top surface 15 of the channels 12 at the first end 10-1 and the second end 10-2.
  • the sloping intermediate surfaces 13 have a downwardly inclination from the first end 10-1 and the second end 10-2 in a direction towards a middle portion 17 of the sheet 10. Between the first end portion 11-1 and the second end portion 11-2, the intermediate surfaces between the channels 12 are substantially parallel with the channels 12.
  • the sloping intermediate surfaces 13 provide open ends for each pair of joined sheet 10 as no channels are formed at the first end 10-1 and second end 10-2.
  • the first end portion 11-1 and the second end portion 11-2 act as flow distribution members, evenly distributing incoming fluid flow 18 into the plurality of joined channels 12 at the first end 10-1, and collecting the flow from each channel 12 at the second end 10-2. This process is schematically illustrated in Fig. 12a .
  • the sloping intermediate surfaces which are substantially in level with the top surfaces 15 of channels 12 at the first end 10-1 and the second end 10-2 provide a distancing element so that stacked pairs of sheets 10 may be properly distanced. Thereby fluid flow between each layer of joined pair of sheets 10 may be obtained. The distancing will appear only at the first end portion 11-1 and the second end portion 11-2. Fluid flow may hence be provided unobstructed in the area between the first end portion 11-1 and the second end portion 11-2.
  • other separating means may be provided along the axial extension of the sheet, if the sheets are very long, in order to separate pairs of sheet from each other.
  • Fig. 13 shows a front view of the sheet 10.
  • a flat surface 19 allows the stacking of multiple pairs of sheet 10 while distancing each pair properly from its two adjacent pairs of sheet 10.
  • Fig. 14 shows a stacked sheet assembly 16', which is a variation of the stacked sheet assembly 16.
  • the stacked sheet assembly 16' has similar design as that of stacked sheet assembly 16.
  • sheet 10' utilizes other techniques than the above-described sloping intermediate surfaces for distancing each pair of joined sheets 10'.
  • each pair of joined sheets 10' may be stacked with other joined pair of sheets 10' by e.g. providing a string of hot-melt adhesive transversally across an outer surface 15' of a first and a second end of each sheet 10'.
  • Another alternative is to provide distancing members at each end.
  • Fig. 15 illustrates how fluid flows transversally across a part of the stacked sheet assembly 16.
  • a fluid flow F between only two pairs of joined sheet 10 is shown for illustrative purposes.
  • the fluids flowing through the stacked sheet assembly 16 may be any gas, or any liquid suitable for applications exchanging solutes and/or heat.
  • the sheet may be constructed from any suitable material, depending on the application, e.g. for exchanging solutes, or for cooling or heating purposes.
  • a sheet may have a first end and a second end which are not opposite each other; the sheet may have other shapes than being rectangular.
  • the sheet may have a rhomboid shape, or being formed as a 'U'.

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  • 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)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP10798202.7A 2009-11-24 2010-11-24 A method of producing multiple channels for use in a device for exchange of solutes or heat between fluid flows and respective device Not-in-force EP2504652B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201031847T SI2504652T1 (sl) 2009-11-24 2010-11-24 Metoda za pridobivanje več kanalov za uporabo v napravi za izmenjavo topljencev ali toplote med tekočinskimi tokovi

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0950889A SE534985C2 (sv) 2009-11-24 2009-11-24 Förfarande för framställning av multipla kanaler för användning i en anordning för utbyte av en substans eller lösta ämnen mellan fluidflöden
US12/624,612 US20110120934A1 (en) 2009-11-24 2009-11-24 Method of producing multiple channels for use in a device for exchange of solutes between fluid flows
PCT/SE2010/051298 WO2011065906A2 (en) 2009-11-24 2010-11-24 A method of producing multiple channels for use in a device for exchange of solutes or heat between fluid flows

Publications (2)

Publication Number Publication Date
EP2504652A2 EP2504652A2 (en) 2012-10-03
EP2504652B1 true EP2504652B1 (en) 2018-10-31

Family

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Family Applications (1)

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EP10798202.7A Not-in-force EP2504652B1 (en) 2009-11-24 2010-11-24 A method of producing multiple channels for use in a device for exchange of solutes or heat between fluid flows and respective device

Country Status (11)

Country Link
EP (1) EP2504652B1 (sl)
JP (1) JP5823406B2 (sl)
CN (1) CN102686968B (sl)
AU (1) AU2010325220B2 (sl)
BR (1) BR112012012523A8 (sl)
CA (1) CA2781596C (sl)
ES (1) ES2706907T3 (sl)
MX (1) MX336904B (sl)
RU (1) RU2555103C2 (sl)
SI (1) SI2504652T1 (sl)
WO (1) WO2011065906A2 (sl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2985011B1 (fr) * 2011-12-21 2018-04-06 F2A - Fabrication Aeraulique Et Acoustique Plaque pour echangeur thermique
RU168647U1 (ru) * 2016-02-16 2017-02-13 Андрей Вячеславович Колчанов Пакет пластинчатого тепловлагообменника
FI3816566T3 (fi) * 2018-06-27 2023-05-25 Welcon Inc Lämmönsiirtolaite ja menetelmä sen valmistamiseksi
EP3816565A4 (en) * 2018-06-27 2021-06-16 Welcon Inc. HEAT TRANSFER DEVICE AND METHOD OF MANUFACTURING THEREOF

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JPS57134692A (en) * 1981-02-12 1982-08-19 Katsusaburo Fukumoto Radiator of oil-filled transformer group
JPS59130980U (ja) * 1983-02-16 1984-09-03 株式会社島津製作所 熱交換器
JP3546574B2 (ja) * 1996-01-08 2004-07-28 三菱電機株式会社 熱交換器
JP3461697B2 (ja) * 1997-10-01 2003-10-27 松下エコシステムズ株式会社 熱交換素子
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JP2004044881A (ja) * 2002-07-10 2004-02-12 Hitachi Cable Ltd 伝熱用パネル
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JP4855386B2 (ja) * 2006-10-03 2012-01-18 三菱電機株式会社 全熱交換素子及び全熱交換器
JP5107604B2 (ja) * 2007-04-27 2012-12-26 株式会社ティラド 熱交換器の製造方法および熱交換器
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Also Published As

Publication number Publication date
AU2010325220A1 (en) 2012-06-14
JP5823406B2 (ja) 2015-11-25
AU2010325220B2 (en) 2014-06-19
RU2012123873A (ru) 2013-12-27
RU2555103C2 (ru) 2015-07-10
CA2781596C (en) 2018-01-02
CA2781596A1 (en) 2011-06-03
JP2013512408A (ja) 2013-04-11
MX2012005931A (es) 2012-07-23
CN102686968B (zh) 2015-03-25
BR112012012523A2 (pt) 2016-04-26
WO2011065906A2 (en) 2011-06-03
BR112012012523A8 (pt) 2017-10-10
CN102686968A (zh) 2012-09-19
MX336904B (es) 2016-02-02
ES2706907T3 (es) 2019-04-01
WO2011065906A3 (en) 2011-07-28
SI2504652T1 (sl) 2019-03-29
EP2504652A2 (en) 2012-10-03

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