WO2006034666A1 - Recuperateur a microcanaux produit a partir de feuilles empilees - Google Patents

Recuperateur a microcanaux produit a partir de feuilles empilees Download PDF

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Publication number
WO2006034666A1
WO2006034666A1 PCT/DE2005/001463 DE2005001463W WO2006034666A1 WO 2006034666 A1 WO2006034666 A1 WO 2006034666A1 DE 2005001463 W DE2005001463 W DE 2005001463W WO 2006034666 A1 WO2006034666 A1 WO 2006034666A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
recuperator
channel
microchannel
webs
Prior art date
Application number
PCT/DE2005/001463
Other languages
German (de)
English (en)
Inventor
Bernd Johannhörster
Original Assignee
Powerfluid Gmbh
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
Application filed by Powerfluid Gmbh filed Critical Powerfluid Gmbh
Priority to DE112005002202T priority Critical patent/DE112005002202A5/de
Publication of WO2006034666A1 publication Critical patent/WO2006034666A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/086—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning having one or more openings therein forming tubular heat-exchange passages
    • 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
    • F28D9/0043—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 plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—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 plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2260/00—Heat exchangers or heat exchange elements having special size, e.g. microstructures
    • F28F2260/02—Heat exchangers or heat exchange elements having special size, e.g. microstructures having microchannels

Definitions

  • the invention relates to a recuperator, a micro-channel recuperator, the use of a film, a slotted or perforated film and a method for producing a recuperator and a method for operating the same.
  • Microchannel heat exchangers are, for example, by Ehrhard and Meisel (P. Erhard, I. Meisel: “Flow and Transport Problems in Micro Channels", News-Forschungstechnik Düsseldorfwegg. 34 2-3 / 2002 P. 137/142) and of Pua and Rumbold (Lee M. Pua, SO Rumbold: "Industrial Microchannel Devices- Where Are We Today?", Abstract, First International Conference on Micro- phones and Minichannels April 24-25, 2003, Rochester, NY, USA; ICMM2003-1101) been discussed.
  • Known microstructure heat exchangers are generally constructed from a stack of alternating layers of metal sheets with channel structures.
  • the heat exchange takes place between the two guided fluids through a separation membrane from a layer with channel structure to the underlying and overlying layer.
  • channel structures for more than two fluids are possible.
  • the channels of the respective structural surface are geometrically arranged so that they can be combined in common connections.
  • microchannel recuperator for exchanging heat between two fluids, which has sheet layers with free spaces in the film stack which are stacked in a planar manner, the free spaces in their arrangement providing two separate microchannel systems.
  • the invention breaks with the erroneous idea that films can not be suitable for producing pressure-resistant and economically producible microchannel structures. It shows that by appropriate placement of the films by means of slots and / or holes in the films suitable currents can be achieved.
  • the recuperator according to the present invention can be produced in comparison with hitherto known microchannel heat exchangers with considerably more economical production processes. It can also be used for the heat exchange of fluids in the very low to very high temperature range as well as at low pressure and high pressure.
  • the recuperator can be operated with an almost arbitrarily large pressure gradient between the two fluids, even at very high pressure differences above 1000 bar, which is very surprising given the low inherent strength of a film.
  • the invention is suitable for liquids, vapors and gases.
  • the free spaces in the film stack are formed by recesses in the film layers.
  • the recesses may be produced, for example, in that a film layer has a continuous sheet with slots.
  • the distances between the strips form the recesses of the film layers, so that practically identical geometries can be produced in the channel system.
  • holes of various types may be used, for example round or angular holes.
  • each individual film layer can be kept simple, preferably by a plurality of slots which are parallel to each other, are the same length and have an equal width over their entire length.
  • the channels of the Mirokanal structures are arranged diagonally to each other.
  • the nearest adjacent microchannels are arranged in the grid over a cross section through the film stack just above and exactly below each microchannel of each second film layer.
  • each microchannel only has two nearest microchannels of the other microchannel system.
  • each film layer be arranged in a grid so that a first group of webs extending between the holes extends on each film layer and a second set of webs arranged perpendicularly to the first group, and that the film layers are stacked with an offset of the holes, so that between two holes of a first and a third layer, which lie one above the other, a web lies in the second film layer which still leaves a passage between the holes of the first and the third layer.
  • each hole is connected to two holes arranged congruently, the two film layers are above or two film layers below.
  • each wall having laterally projecting ribs which protrude into the different microchannel systems.
  • the heat exchange can thus take place via the ribs and across the wall during operation of the proposed recuperator.
  • FIG. 1 shows a schematic plan view of a film with slots and feedthroughs
  • FIG. 2 is a schematic perspective view of a stack of films according to FIG. 1, the film stack being cut approximately at the height of the marking II-II in FIG. 3 shows a schematic perspective view of a heat exchanger with the Folien ⁇ stack of Figure 2 as a central component, wherein the film stack of Figure 2 is approximately along the marking III-III cut,
  • FIG. 4 shows a schematic perspective view of a film stack comparable to the view in FIG. 2, in which film strips are used instead of slotted foils,
  • FIG. 6 shows a foil stack of foils according to FIG. 5 in a perspective view according to the viewing direction and sectional marking VI-VI in FIG. 5.
  • the film 1 in Figure 1 has a substantially rectangular, elongated shape.
  • her four slots 2 are provided, which are arranged parallel to each other and to a longitudinal axis of the film 1.
  • two holes 4 are introduced into the film 1 next to each slot at the two slot ends.
  • the slots 2 and thus also the webs 5 are arranged on the film 1 outwardly. Specifically, the four slots 2 are offset from a theoretically possible central position in a transverse direction 6. The offset is chosen so that when placing a second film (see Figure 2) on the film 1, each slot 2 in the film 1 is covered with a web, if the aufchelde second film is identical to the film 1, but with respect to the longitudinal axis is mirrored.
  • each slot 2 with a web of the overlying film is enforced by the geometry, as along a transverse distance 7 to each point (exemplary numbered 8, 9, 10), which is located within a slot 2, a counter point 8 ', 9', 10 'exists, the be ⁇ trags schizophrenia a same distance from a first edge 11 and to a second edge 12 of the film first has and is located on a bridge 5.
  • the distance between the edge of the special slot 13 and the longitudinal axis 3 is set exactly so that the distance from the edge of the special slot 14 to the longitudinal axis 3 amounts to the width of a slot 2 plus twice the distance of the edge of the special slot 13 to the longitudinal axis 3.
  • each slot exemplarily numbered 25
  • two webs exemplarily numbered 26, 27
  • the layers of films 21, 22, 23, 24 with the slots 25 completely overlapped or underlaid result in channels 29 in each film layer 21, 22, 23, 24.
  • the channels 29 are laterally separated from each other by the walls 28 separated and lie with respect to each wall 28 over the height alternately.
  • the special wall 30 is a first microchannel 31 on the first side.
  • the special channel 32 at the height of the wall 30.
  • the special channel 33 follows obliquely offset.
  • the special channel 34 is found on the opposite side.
  • the exact shape of the channels 29 is determined by the thickness of the films 21, 22, 23, 24 and by the width of the slots 25.
  • the width of the walls 28, 30 is determined by the width of the webs and slots: it is half the difference between web and slot width.
  • the film stack 20 is used as follows: The film stack 20 is covered on its top 40 and on its bottom 41 with cover plates 42, 43.
  • the rohrähn ⁇ union channels 44, 45 in the film stack 20 are connected by bores 46, 47 in the cover plates 42, 43 with Sammelzuschreibrohren and Sammelabschreibrohren 48, 49, 50, 51.
  • a first group 44 of tube-like channels is connected to the collecting feed 48 and the collecting discharge 49, while the second group 45 of the tube-like channels is connected to the collecting feed 50 and the Samnielabbow 51.
  • a first fluid 52 (represented by a flow direction arrow) is supplied through the collection feed 48 to the microchannel heat exchanger.
  • a second fluid 53 passes through the heat exchanger 54 in the opposite direction: it flows through the collection supply 50 (collecting supply pipe on the back of the heat exchanger 54, not shown) via local tube-like channels (not shown) in the horizontal microchannels, passes through them towards the front of the heat exchanger 54, there is collected in the first group of rohrähnli ⁇ chen channels 54 and the collection discharge 51 is supplied.
  • the heat exchange takes place as follows: The first fluid 52 is fed through a separate microchannel system to every other microchannel column and flows through all microchannels of these columns in full length.
  • the film stack 20 'in FIG. 4 uses individual strip-shaped films 21a, 21b, 21c, 2Id to form webs of a film layer (exemplarily numbered 21', 24 '). or 24a, 24b, 24c, 24d.
  • the slots are thus formed by the distance between the individual film strips. Otherwise, the use of foil strips leads to no structural differences compared to the slotted foils 21, 22, 23, 24.
  • the alternative film 70 in FIG. 5 is perforated in a grid. Holes (exemplified gekenn ⁇ with 71, 72) are arranged in a longitudinal direction 73 and a transverse axis 74 parallel rows. The perforations are almost square in the embodiment shown. It should be understood that they may also take many other forms, for example, they may be circular or rectangular.
  • perforations 71, 72 extend on the film 70 longitudinal webs (exemplified gekennzeich ⁇ net with 75) and transverse webs (exemplified by 76).
  • the perforations 71, 72 and webs 75, 76 are arranged on the film 70 according to the geometry already described with reference to a slotted film so that upon rotation of the film 70 by 180 ° about its transverse axis 74 and when placed on a non-rotated film the Transverse webs 76 of the overlying film cover the square holes 72 of darun ⁇ ter lying film exactly in the middle.
  • the width of the transverse webs 76-measured along the longitudinal direction 73 of the film 70 - is shorter than the width of the holes 72-also measured-so free perforations remain at both ends 77, 78 of the perforations 71, 72 covered by the transverse webs 76 79 exist (see in particular on the film stack 80 in Figure 6).
  • the film stack 80 in FIG. 6 When the film stack 80 in FIG. 6 is filled with fluids, they can thus flow meandering in the direction of the longitudinal webs 75 and in the vertical direction 81 through the film stack 80.
  • the transverse webs (identified by 90 by way of example) of adjacent film layers form large areas in each perforation 71, 72 in order to conduct heat from a fluid or to conduct heat into the fluid. End faces 77, 78 of the perforations 71, 72 and the transverse webs 76 are flown in the vertical direction 81 normal and in the longitudinal direction frontally and serve as additional heat exchange surfaces and Verwwirer.
  • channel shafts (identified by way of example by 82) which extend in each case over the entire length and the entire height 81 of the foil stack 80 are formed.
  • the longitudinal webs 75 form by the layering of the individual films 70 Trennissen ⁇ de 83 with double-sided structure of micro-ribs (exemplified by 84, 85 on the spielnem wall 86) on the heat exchange between the meandering in the direction 87 of Kanal ⁇ wells 82nd flowing fluids, wherein the flow of fluids can also take place over several Folien ⁇ , since along the vertical direction 81, the meandering elongate channels are also connected.
  • the proposed heat exchanger structure is not limited to recuperators, but rather also advantageous as a structure for a regenerator heat exchanger can be used.
  • the exchange of the heat of the at least two fluids can take place in cocurrent or countercurrent.
  • the microchannels can be connected so that the inflow and outflow of the fluids can take place without crossing.
  • the structure of the proposed micro ribbed wall heat exchanger allows the heat exchange of fluids in the low to high temperature range and in the low pressure and high pressure ranges.
  • the proposed geometry of the individual foils and the overall arrangement of the microchannel systems in the film stacks can also be advantageously used with metal sheets, ie generally with thicker sheet-like components. Even with the use of such components, a device improved over previously known heat exchangers is achieved.
  • the invention is thus not limited to the use of thin films. For thin films, however, it achieves a surprisingly high degree of efficiency.

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)

Abstract

L'objectif de cette invention est de pouvoir produire des échangeurs thermiques à microcanaux de manière particulièrement efficace et très peu onéreuse. A cet effet, des couches de feuilles minces empilées à plat sont disposées de manière que des zones libres ménagées dans la pile de feuilles (20) forment deux systèmes de microcanaux séparés. Cette invention concerne également l'utilisation d'une feuille perforée ou entaillée (21, 22, 23, 24) ou de bandes de feuille pour produire une pile de feuilles (20) pour un échangeur thermique à microcanaux. La présente invention se rapporte en outre à un procédé de production d'un échangeur thermique à microcanaux.
PCT/DE2005/001463 2004-09-27 2005-08-18 Recuperateur a microcanaux produit a partir de feuilles empilees WO2006034666A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112005002202T DE112005002202A5 (de) 2004-09-27 2005-08-18 Rekuperator, Mikrokanal-Rekuperator, Folie, Verwendung einer Folie und Verfahren zum Herstellen sowie zum Betreiben eines Rekuperators

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004046718.8 2004-09-27
DE102004046718 2004-09-27
DE102005007707.2 2005-02-18
DE102005007707A DE102005007707A1 (de) 2004-09-27 2005-02-18 Rekuperator, Mikrokanal-Rekuperator, Folie, Verwendung einer Folie und Verfahren zum Herstellen sowie zum Betreiben eines Rekuperators

Publications (1)

Publication Number Publication Date
WO2006034666A1 true WO2006034666A1 (fr) 2006-04-06

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Family Applications (1)

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PCT/DE2005/001463 WO2006034666A1 (fr) 2004-09-27 2005-08-18 Recuperateur a microcanaux produit a partir de feuilles empilees

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DE (2) DE102005007707A1 (fr)
WO (1) WO2006034666A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009052489A1 (de) * 2009-04-29 2010-11-11 Siemens Aktiengesellschaft Vorrichtung zum Austausch von Wärme mit einem Plattenpaket und Verfahren zu deren Herstellung
WO2011038988A2 (fr) * 2009-09-29 2011-04-07 Siemens Aktiengesellschaft Procédé de fabrication d'une plaque de refroidissement et dispositif fabriqué selon ce procédé
DE102019205383A1 (de) * 2019-04-15 2020-10-15 Vitesco Technologies Germany Gmbh Kühler zur Kühlung einer Elektronikschaltung, Leistungselektronikvorrichtung mit einem Kühler

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4624305A (en) * 1981-02-25 1986-11-25 Institut Francais Du Petrole Heat exchanger with staggered perforated plates
US4762172A (en) * 1985-06-25 1988-08-09 Institute Francais Du Petrole Heat exchange device of the perforated plate exchanger type with improved sealing
US4808262A (en) * 1985-12-16 1989-02-28 General Electric Company Method for devolatilizing polymer solutions
US5727618A (en) * 1993-08-23 1998-03-17 Sdl Inc Modular microchannel heat exchanger
WO2000034728A1 (fr) * 1998-12-09 2000-06-15 Chart Heat Exchangers Limited Echangeur de chaleur
US6490812B1 (en) * 1999-03-08 2002-12-10 Battelle Memorial Institute Active microchannel fluid processing unit and method of making
US20030152488A1 (en) * 2002-02-14 2003-08-14 Tonkovich Anna Lee Methods of making devices by stacking sheets and processes of conducting unit operations using such devices

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6907921B2 (en) * 1998-06-18 2005-06-21 3M Innovative Properties Company Microchanneled active fluid heat exchanger
DE19821627A1 (de) * 1998-05-14 1999-11-18 Bayer Ag Mikrostrukturierte Folien
US6189217B1 (en) * 1998-06-17 2001-02-20 Black & Decker Inc. Power saw having blade storage chamber
DE19959249A1 (de) * 1999-12-08 2001-07-19 Inst Mikrotechnik Mainz Gmbh Modulares Mikroreaktionssystem
DE10201640A1 (de) * 2002-01-17 2003-08-07 Fraunhofer Ges Forschung Verfahren zur Herstellung einer Folie mit Oberflächenstrukturen im Mikro- und Nanometerbereich sowie eine diesbezügliche Folie
DE10246990A1 (de) * 2002-10-02 2004-04-22 Atotech Deutschland Gmbh Mikrostrukturkühler und dessen Verwendung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4624305A (en) * 1981-02-25 1986-11-25 Institut Francais Du Petrole Heat exchanger with staggered perforated plates
US4762172A (en) * 1985-06-25 1988-08-09 Institute Francais Du Petrole Heat exchange device of the perforated plate exchanger type with improved sealing
US4808262A (en) * 1985-12-16 1989-02-28 General Electric Company Method for devolatilizing polymer solutions
US5727618A (en) * 1993-08-23 1998-03-17 Sdl Inc Modular microchannel heat exchanger
WO2000034728A1 (fr) * 1998-12-09 2000-06-15 Chart Heat Exchangers Limited Echangeur de chaleur
US6490812B1 (en) * 1999-03-08 2002-12-10 Battelle Memorial Institute Active microchannel fluid processing unit and method of making
US20030152488A1 (en) * 2002-02-14 2003-08-14 Tonkovich Anna Lee Methods of making devices by stacking sheets and processes of conducting unit operations using such devices

Also Published As

Publication number Publication date
DE102005007707A1 (de) 2006-03-30
DE112005002202A5 (de) 2008-06-26

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