EP1046867A2 - Transfert de chaleur sur un fluide dans un corps de microstructure - Google Patents

Transfert de chaleur sur un fluide dans un corps de microstructure Download PDF

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Publication number
EP1046867A2
EP1046867A2 EP00107948A EP00107948A EP1046867A2 EP 1046867 A2 EP1046867 A2 EP 1046867A2 EP 00107948 A EP00107948 A EP 00107948A EP 00107948 A EP00107948 A EP 00107948A EP 1046867 A2 EP1046867 A2 EP 1046867A2
Authority
EP
European Patent Office
Prior art keywords
fluid
heated
microstructure body
heat
microstructure
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.)
Granted
Application number
EP00107948A
Other languages
German (de)
English (en)
Other versions
EP1046867A3 (fr
EP1046867B1 (fr
Inventor
Klaus Dr. Schubert
Jürgen Brandner
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.)
Forschungszentrum Karlsruhe GmbH
Original Assignee
Forschungszentrum Karlsruhe GmbH
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Filing date
Publication date
Application filed by Forschungszentrum Karlsruhe GmbH filed Critical Forschungszentrum Karlsruhe GmbH
Publication of EP1046867A2 publication Critical patent/EP1046867A2/fr
Publication of EP1046867A3 publication Critical patent/EP1046867A3/fr
Application granted granted Critical
Publication of EP1046867B1 publication Critical patent/EP1046867B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • 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 present invention relates to a method for heat transfer with a fluid in a microstructure body a variety of microchannels for the removal and supply of the Fluids as well as one that transfers the thermal energy to the fluid Energy carrier and a microstructure body for exercise of the procedure.
  • the invention proposes the features before, cited in the characterizing part of claim 1 are. Further advantageous features for the solution are cited in the characterizing parts of the subclaims.
  • Microstructure bodies of the type mentioned are generally characterized in that either the characteristic hydraulic channel diameter d i or the channel dimensions a i , where a i is the largest dimension of a microchannel perpendicular to the fluid passage i, of all microchannels of at least one fluid passage i are less than 1000 ⁇ m.
  • the smallest wall thickness b i that is to say the smallest distance between individual fluid passages, should also be chosen to be less than 1000 ⁇ m, preferably less than 200 ⁇ m.
  • the specific heat transfer area can reach values greater than 100 cm 2 / cm 3 . This results in an overall increase in volume-specific heat transfer performance by at least a factor of 100 compared to conventional heat exchangers.
  • the experimental data obtained from microstructure bodies for heat transfer result in heating rates of up to 10000 K per second with dwell times down to a few milliseconds. Therefore, a liquid flow of 400 kg / h in a microstructure body of 1 cm 3 active volume at 6 bar inlet and 1 bar outlet pressure can be heated by 30 ° K in 3 milliseconds. Throughputs of approx. 4000 kg / h result for larger microstructure bodies with an active volume of 27 cm 3 .
  • the active volume of a microstructure body is to be understood as the volume in the interior in which the microchannels run, the volume of top and side plates and that of the connections not being included in the calculation.
  • the fluid to be heated is passed through at least one level or layer of a microstructure body with a large number of adjacent microchannels or micro breakthroughs, their transverse dimensions
  • smaller than 1000 ⁇ m are preferred smaller than 500 ⁇ m
  • immediately adjacent to it fluid-carrying level at least one layer with at least an electrically heated heating element is arranged, which electrically insulated from the material of the fluid level is.
  • many levels or Alternating layers with micro breakthroughs for the fluids with layers with electrically heated heating elements into one compact unit arranged as in those described later Figures 1 and 2 shown in principle.
  • the heating elements can be used depending on the application Current flow in series or in parallel or in a combination of which are switched.
  • Fluids can have several in the heating layers Heating elements, seen in the direction of flow, one behind the other be arranged, the different electrical Deliver services.
  • the fluid-carrying microstructures, - seen again in the direction of flow -, on different temperatures are heated. Thereby can be a temperature profile in the microstructure body Performing a process in the flowing fluid become. This can be important if e.g. B. in the microstructure body a chemical, endothermic process is performed at which the temperature in the direction of flow first kept constant and then increased in a targeted manner got to.
  • FIG. 1 Such a microstructure body 1 is now shown in FIG. 1 shown schematically, installed in the eleven double foil pieces are welded together and one above the other stacked eleven rows of microchannels 2 result.
  • Each the film double piece contains a multiplicity of microchannels with a width and height of 150 ⁇ m and a length of 22 mm. Their hydraulic diameter is 133 ⁇ m.
  • the eleven welded together Foil double pieces are each on their Edges on top of each other with ten spacers 3 to one Block welded so that 3 flat by the spacers Cavities 4 are formed between the film double pieces, in which plate-shaped, ceramic electrical heating elements 5 can be used.
  • microstructure body 1 On the face of the microstructure body 1 with the openings of the microchannels 2 are hollow adapter pieces 6 through which the to be heated Fluid 7 is passed into the microchannels 2.
  • the Microstructure body 1 is at the top and bottom with two end plates 7 completes that with the structures of the film double pieces and the spacers 3 to a closed Block are diffusion welded.
  • FIG. 2 Another embodiment of a microstructure body is shown in Figure 2. With this microstructure body 13 resistance heating cartridges 9 are used for heating. Between two steel plates 10 as a lid and bottom of the microstructure body are each several with microchannels 14 structured steel foils 11 and spacers 12 layered as heated layers in alternating order and diffusion welded together. In the microstructured foils 11 are each a large number of microchannels 14 for the fluid 7 with approximately those already introduced dimensions. The heating cartridges 9 are inserted into holes in the spacers 12. The Fluid connection to the microchannels 14 does not take place by means of Standard fittings shown as connecting pieces serve. Depending on the number and the output of the heating cartridges 9 can the total performance of such a microstructure body 13 in the range of a few 100W to several kW.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Micromachines (AREA)
EP00107948A 1999-04-17 2000-04-14 Transfert de chaleur sur un fluide dans un corps de microstructure Expired - Lifetime EP1046867B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19917521A DE19917521B4 (de) 1999-04-17 1999-04-17 Vorrichtung zum Erwärmen eines Fluids
DE19917521 1999-04-17

Publications (3)

Publication Number Publication Date
EP1046867A2 true EP1046867A2 (fr) 2000-10-25
EP1046867A3 EP1046867A3 (fr) 2002-10-23
EP1046867B1 EP1046867B1 (fr) 2004-04-07

Family

ID=7905003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107948A Expired - Lifetime EP1046867B1 (fr) 1999-04-17 2000-04-14 Transfert de chaleur sur un fluide dans un corps de microstructure

Country Status (3)

Country Link
EP (1) EP1046867B1 (fr)
AT (1) ATE263949T1 (fr)
DE (2) DE19917521B4 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2096399A1 (fr) 2008-02-29 2009-09-02 XChange S.r.L. Échangeur thermique doté de boites a eau modulaires
WO2011091962A1 (fr) 2010-01-28 2011-08-04 Cargill, Incorporated Microtraitement servant à la préparation d'un polycondensat
EP2433970A1 (fr) 2010-09-28 2012-03-28 Cargill, Incorporated Procédé en microfluidique pour préparer un polycondensat
WO2021195534A1 (fr) 2020-03-26 2021-09-30 Cargill, Incorporated Microtraitement pour la préparation d'une protéine modifiée
WO2023159171A1 (fr) 2022-02-17 2023-08-24 Cargill, Incorporated Dextrines résistantes et procédés de fabrication de dextrines résistantes
WO2023159175A1 (fr) 2022-02-17 2023-08-24 Cargill, Incorporated Dextrines résistantes et procédés de fabrication de dextrines résistantes
WO2023159173A1 (fr) 2022-02-17 2023-08-24 Cargill, Incorporated Dextrines résistantes et procédés de fabrication de dextrines résistantes
WO2023159172A1 (fr) 2022-02-17 2023-08-24 Cargill, Incorporated Dextrines résistantes et procédés de fabrication de dextrines résistantes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10234043A1 (de) * 2002-07-26 2004-02-05 Forschungszentrum Karlsruhe Gmbh Mikrostrukturapparat zum Erhitzen eines Fluids
DE102005003964B4 (de) * 2005-01-27 2011-07-21 Ehrfeld Mikrotechnik BTS GmbH, 55234 Kontinuierlich durchströmter Wärmeübertrager für fluide Medien
DE102005008271A1 (de) * 2005-02-22 2006-08-24 Behr Gmbh & Co. Kg Mikrowärmeübertrager
DE102005025248B4 (de) * 2005-06-02 2009-07-30 Forschungszentrum Karlsruhe Gmbh Fluidführungssystem
WO2024036206A1 (fr) 2022-08-12 2024-02-15 Cargill, Incorporated Polycondensation de sucres en présence d'eau à l'aide d'un microréacteur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195249A (en) * 1986-09-25 1988-04-07 Wilson Richard Apparatus for the heating of fluids
EP0454550A1 (fr) * 1990-04-25 1991-10-30 Vulcanic Echangeur de chaleur, notamment pour fluides corrosifs
US5690763A (en) * 1993-03-19 1997-11-25 E. I. Du Pont De Nemours And Company Integrated chemical processing apparatus and processes for the preparation thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406238A1 (de) * 1984-02-21 1985-08-22 Eltra GmbH & Co KG, Leicht & Trambauer, 6102 Pfungstadt Elektrische heizpatrone
DE19608824A1 (de) * 1996-03-07 1997-09-18 Inst Mikrotechnik Mainz Gmbh Verfahren zur Herstellung von Mikrowärmetauschern

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195249A (en) * 1986-09-25 1988-04-07 Wilson Richard Apparatus for the heating of fluids
EP0454550A1 (fr) * 1990-04-25 1991-10-30 Vulcanic Echangeur de chaleur, notamment pour fluides corrosifs
US5690763A (en) * 1993-03-19 1997-11-25 E. I. Du Pont De Nemours And Company Integrated chemical processing apparatus and processes for the preparation thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DANNENBERG F: "Application of reaction kenetics to the denaturation of whey proteins in heated milk" MILCHWISSENSCHAFT, VV GMBH VOLKSWIRTSCHAFTLICHER VERLAG. MUNCHEN, DE, Bd. 43, Nr. 1, 1988, Seiten 3-7, XP002142511 ISSN: 0026-3788 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2096399A1 (fr) 2008-02-29 2009-09-02 XChange S.r.L. Échangeur thermique doté de boites a eau modulaires
WO2011091962A1 (fr) 2010-01-28 2011-08-04 Cargill, Incorporated Microtraitement servant à la préparation d'un polycondensat
EP2433970A1 (fr) 2010-09-28 2012-03-28 Cargill, Incorporated Procédé en microfluidique pour préparer un polycondensat
WO2021195534A1 (fr) 2020-03-26 2021-09-30 Cargill, Incorporated Microtraitement pour la préparation d'une protéine modifiée
WO2023159171A1 (fr) 2022-02-17 2023-08-24 Cargill, Incorporated Dextrines résistantes et procédés de fabrication de dextrines résistantes
WO2023159175A1 (fr) 2022-02-17 2023-08-24 Cargill, Incorporated Dextrines résistantes et procédés de fabrication de dextrines résistantes
WO2023159173A1 (fr) 2022-02-17 2023-08-24 Cargill, Incorporated Dextrines résistantes et procédés de fabrication de dextrines résistantes
WO2023159172A1 (fr) 2022-02-17 2023-08-24 Cargill, Incorporated Dextrines résistantes et procédés de fabrication de dextrines résistantes

Also Published As

Publication number Publication date
DE19917521A1 (de) 2000-11-16
DE50005953D1 (de) 2004-05-13
DE19917521B4 (de) 2004-10-21
EP1046867A3 (fr) 2002-10-23
EP1046867B1 (fr) 2004-04-07
ATE263949T1 (de) 2004-04-15

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