US20080196862A1 - Heat or Cold Reservoir - Google Patents

Heat or Cold Reservoir Download PDF

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Publication number
US20080196862A1
US20080196862A1 US12/064,109 US6410906A US2008196862A1 US 20080196862 A1 US20080196862 A1 US 20080196862A1 US 6410906 A US6410906 A US 6410906A US 2008196862 A1 US2008196862 A1 US 2008196862A1
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US
United States
Prior art keywords
accumulator
heat exchanger
metal
tube
heat
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.)
Abandoned
Application number
US12/064,109
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English (en)
Inventor
Wolfgang Kramer
Noureddine Khelifa
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.)
Webasto SE
Original Assignee
Webasto SE
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 Webasto SE filed Critical Webasto SE
Assigned to WEBASTO AG reassignment WEBASTO AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRAMER, WOLFGANG, KHELIFA, NOUREDDINE
Publication of US20080196862A1 publication Critical patent/US20080196862A1/en
Abandoned 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
    • F28D1/00—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, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—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, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—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, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—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, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—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, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F28D1/0478—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, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag the conduits having a non-circular cross-section
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • F28D20/023—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the invention relates to a heat or cold accumulator having a porous body for holding an accumulator medium and having a first heat exchanger which is embedded in the porous body and comprises at least one metal tube, which first heat exchanger can be traversed by a heat transfer medium for charging the accumulator with cold or heat.
  • Accumulators of said type serve in particular for the auxiliary air-conditioning of utility vehicle cabins, stop-and-go air-conditioning in vehicles whose internal combustion engine is shut down when at a standstill, and for pre-cooling of vehicle interior spaces in order to thereby accelerate the cooling when the vehicle is started.
  • accumulators of said type When used as a cold accumulator, the embedded heat exchanger is generally connected into a compression refrigeration circuit; when used as a heat accumulator, the heat exchanger will be connected into the heating circuit of the vehicle.
  • a generic accumulator is known from DE 102 42 069 A1.
  • it is provided to introduce the heat exchanger for charging the accumulator as a serpentine-shaped flat tube into an arrangement of porous graphite plates.
  • said accumulator is charged as a result of cooling of the accumulator medium held in the graphite plates.
  • DE 103 18 655 B3 likewise describes an accumulator having a porous body for holding an accumulator medium.
  • Said document describes a possibility for discharging a cold accumulator of said type specifically by means of an overflow of evaporated refrigerant from an evaporator into a tank which surrounds the accumulator.
  • a discharging process of said type is however expedient only with regard to stop-and-go operation; universal use with regard to the main applications of cold accumulators specified above is not possible.
  • the cited disclosure also already proposes to use a porous body composed of metal foam instead of a porous body composed of graphite.
  • a disadvantage of an accumulator with a graphite matrix is however that the filling of the accumulator with the accumulator medium is complex since it necessitates the application of a filling pressure. Further properties of the graphite matrix have room for improvement, such as for example the thermal conductivity and the mechanical stability.
  • the invention is based on the object of refining an accumulator of the generic type in such a way that its thermal properties are at least maintained if not improved, and which can be filled with a heat accumulator medium in a simple manner.
  • a possibility for discharging the accumulator should also be created which can be used universally in all applications.
  • the invention builds on the generic accumulator in that a second heat exchanger, which is provided for discharging the accumulator, is embedded in the porous body, which second heat exchanger comprises at least one metal tube, and in that the porous body is composed at least partially of metal foam, with the metal foam being composed of the same metal as the metal tubes.
  • the accumulator therefore has two heat exchangers, with the one heat exchanger being provided for charging the accumulator and the other heat exchanger being provided for discharging the accumulator.
  • the porous body for holding the heat accumulator medium is composed of aluminum, as are the heat exchanger tubes.
  • metal foam values are given here and below by way of example for aluminum—has a higher thermal conductivity than graphite, specifically approximately 30 W/mK. This is advantageous for the dynamics of the accumulator.
  • the absorption capacity for the heat accumulator medium and in particular for water is increased, specifically by at least 10%.
  • the energy density is increased considerably, specifically to 618 Wh/kg metal foam or 100 Wh/l metal foam.
  • a weight reduction of the accumulator matrix of around 2% is obtained. It is likewise to be mentioned that the filling technology is improved.
  • the invention is advantageously refined in that the metal tubes extend through the metal foam body in a meandering fashion. As a result of the meandering guidance of the metal tubes through the metal foam body, it is possible to provide a large overall area for the heat transfer between the metal tubes and the metal foam matrix.
  • the metal foam body is composed of a plurality of metal foam plates, with tube sections of the heat exchangers running between the plates. It is therefore possible for the tubes to run between two adjacent metal foam plates, with it being possible for cutouts to be provided in the plates, which cutouts are matched to the outer contour of the tubes. Recesses of said type can be milled into the metal foam plates or provided already during the production of the plates. It is also possible to connect half-tubes to the metal foam plates before the latter are joined together, be it by adhesive bonding, pressing or welding, so that as the metal plates are joined together, the half-tubes which are adhered to the respective metal plates are joined to form a complete tube.
  • the different metal foam plates can likewise be adhesively bonded, pressed or connected to one another by means of other suitable methods.
  • the metal foam body is composed of a plurality of metal foam plates, with tube sections of the heat exchangers being embedded into the plates.
  • metal foam plates are pre-manufactured with tubes arranged thereon.
  • plates of said type are placed one above the other, and the tubes already arranged in the plates are then connected to one another in a suitable way outside the plates.
  • the metal foam body prefferably embodied as a block. If the metal foam body is embodied as a block from the start, it is necessary for openings to be provided or formed therein in order to then insert the tubes into said openings.
  • each heat exchanger has a plurality of metal tubes, with the first end regions of the metal tubes of the first heat exchanger opening out into a common inflow tube and the second end regions of the metal tubes of the first heat exchanger opening out into a common outflow tube, and the first end regions of the metal tubes of the second heat exchanger opening out into a common inflow tube and the second end regions of the metal tubes of the second heat exchanger opening out into a common outflow tube.
  • the outflow and inflow tubes can therefore be easily connected to the respective lines of cooling, refrigeration or heating circuits.
  • individual feed lines are connected to the inflow openings of the inflow tube of the first heat exchanger, which individual feed lines open out into a common feed line.
  • the individual feed lines it is advantageous for the individual feed lines to have substantially the same diameter and the same length. Said identical length of the feed lines is likewise advantageous with regard to the uniform distribution of the heat carrier medium between the individual heat carrier tubes.
  • the accumulator according to the invention is advantageously embodied such that the inflow tube of the first heat exchanger is, in operation of the accumulator, arranged higher than the outflow tube of the first heat exchanger. Said arrangement is advantageous in particular when the heat exchanger is connected into a compression refrigeration circuit in order to thereby prevent oil which is present in the refrigeration circuit from being displaced into the heat exchanger or collecting in the latter and in this way reducing the efficiency of the accumulator.
  • the inflow tube of the second heat exchanger is, in operation of the accumulator, arranged lower than the outflow tube of the second heat exchanger.
  • the coolant for extracting the heat or cold that is to say for example brine, to be transported from bottom to top through the accumulator, since the formation of air bubbles in the heat exchanger is prevented in this way.
  • metal tubes of the heat exchangers are embodied as flat tubes.
  • Flat tubes of said type provide a large surface for the passage of heat between the outer side of the tube and the metal foam matrix.
  • round tubes or tubes with some other arbitrary cross section can also expediently be used within the context of the invention.
  • the interior of the tubes can be provided with separating fins, so that a plurality of individual flow paths run through a tube. Said separating fins increase the surface for the passage of heat between the heat carrier medium and the tube.
  • the accumulator is, for the purpose of cold accumulation, filled with an accumulator medium such as water, paraffin or a mixture of salt hydrates.
  • the accumulator is, for the purpose of heat accumulation, filled with salt hydrate or paraffin.
  • FIG. 1 is a perspective illustration of an accumulator according to the invention.
  • the accumulator 10 is composed of a substantially cuboidal metal foam body 12 .
  • Heat exchangers 14 , 22 are arranged in said metal foam body 12 .
  • the heat exchanger 14 has flat metal tubes 16 , 18 , 20 and the heat exchanger 22 has the metal tubes 24 , 26 , 28 which are likewise embodied as flat tubes.
  • the metal foam body 12 shown here by way of example is composed of a plurality of metal foam plates 30 , 32 , 34 , 36 , 38 , 40 , 42 , 44 which are arranged one above the other. Sections of the metal tubes 16 , 18 , 20 , 24 , 26 , 28 of the two heat exchangers 14 , 22 are situated between in each case two adjacent plates.
  • the plates are matched to the outer contour of the tubes in the regions in which the flat tubes bear against the plates.
  • this can mean that in each case the upper and the lower half-shells of the flat tubes are attached to the plates before the assembly of the metal foam body, so that a complete tube is first formed during assembly.
  • the connection of the tube sections, which are situated between the plates, outside the metal foam body can in this case also be prepared already before the plates are joined together. It can likewise be provided that the meandering heat exchanger is brought into its final form and the accumulator construction is thereafter completed by means of the metal foam plates.
  • the tubes are simultaneously integrated into metal foam plates. After the individual metal foam plates are joined together, the tubes need then merely be joined together outside the metal foam plates. The resulting construction is then similar to that illustrated in FIG. 1 . The same also applies to a construction in which the metal foam block is used from the start, and the tubes are inserted into passage openings of the metal foam block.
  • the tubes 16 , 18 , 20 of the heat exchanger 14 are connected at their one end to a common inflow tube 46 .
  • the tubes 16 , 18 , 20 are connected to a common outflow tube 48 , with said other end regions of the tubes being hidden by the outflow tube 48 in FIG. 1 .
  • the tubes 24 , 26 , 28 of the second heat exchanger 22 are connected to a common inflow tube 50 .
  • the other end regions of the tubes 24 , 26 , 28 of the second heat exchanger 22 are connected to an outflow tube 52 , with said end regions in turn not being visible in FIG. 1 since they are hidden by the metal foam body 12 .
  • the present invention has been described on the basis of an example of a substantially cuboidal accumulator.
  • the invention is not restricted to this.
  • Other shapes for example a cylindrical metal foam matrix with heat exchanger tubes arranged therein, likewise fall within the scope of the present invention.

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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)
  • Dispersion Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US12/064,109 2005-08-22 2006-08-22 Heat or Cold Reservoir Abandoned US20080196862A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005039672.0 2005-08-22
DE102005039672A DE102005039672A1 (de) 2005-08-22 2005-08-22 Speicher für Kälte oder Wärme
PCT/DE2006/001461 WO2007022761A1 (de) 2005-08-22 2006-08-22 Speicher für kälte oder wärme

Publications (1)

Publication Number Publication Date
US20080196862A1 true US20080196862A1 (en) 2008-08-21

Family

ID=37461563

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/064,109 Abandoned US20080196862A1 (en) 2005-08-22 2006-08-22 Heat or Cold Reservoir

Country Status (3)

Country Link
US (1) US20080196862A1 (de)
DE (1) DE102005039672A1 (de)
WO (1) WO2007022761A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100008423A1 (it) 2021-04-06 2022-10-06 Olivieri Paolo Sistema modulare per l’accumulo di energia termica.

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE483947T1 (de) 2006-05-29 2010-10-15 Webasto Ag Kälte- und/oder wärmespeicher
WO2008011846A1 (de) * 2006-07-28 2008-01-31 Webasto Ag Kälte- und/oder wärmespeicher
DE102006044932A1 (de) * 2006-09-22 2008-04-03 Valeo Klimasysteme Gmbh Latenter Kältespeicher
DE102007015710B4 (de) 2006-12-29 2017-11-16 Webasto Ag Klimaanlage mit einem porösen Kältespeicher
DE102007022718A1 (de) 2007-05-15 2008-11-20 Webasto Ag Kälte- und/oder Wärmespeicher
DE102009007786A1 (de) * 2009-02-06 2010-08-19 Institut für Luft- und Kältetechnik gemeinnützige Gesellschaft mbH Latentwärmespeicher für kryogene Temperaturen
ITRM20090561A1 (it) * 2009-11-03 2011-05-04 Magaldi Ind Srl Sistema di stoccaggio e trasporto ad alto livello di efficienza energetica.
IT1396722B1 (it) * 2009-11-03 2012-12-14 Magaldi Ind Srl Sistema di stoccaggio e trasporto ad alto livello di efficienza energetica.
ITRM20090563A1 (it) * 2009-11-03 2011-05-04 Magaldi Ind Srl Sistema di stoccaggio e trasporto ad alto livello di efficienza energetica.
DE102009046547A1 (de) * 2009-11-09 2011-05-12 BSH Bosch und Siemens Hausgeräte GmbH Trockner mit einer Trocknungskammer für zu trocknende Gegenstände und einem Latentwärmespeicher
DE102011004202A1 (de) 2010-02-22 2011-08-25 Hochschule Karlsruhe-Technik und Wirtschaft, 76133 Latentwärmespeicherelement und Energiespeicher
DE202012103717U1 (de) * 2012-09-27 2012-12-14 Viessmann Kältetechnik AG Thermischer Speicher für Kälteanlagen
DE102013221918A1 (de) * 2013-10-29 2015-04-30 Volkswagen Aktiengesellschaft Klimatisierungsvorrichtung eines Kraftfahrzeugs mit einem Kältemittelkreislauf und Verfahren zum Betreiben des Kältemittelkreislaufs
ITPR20130098A1 (it) * 2013-11-29 2015-05-30 Ncr Logistica S R L Scambiatore di calore e metodo per realizzarlo
ITPR20130099A1 (it) * 2013-11-29 2015-05-30 Ncr Logistica S R L Scambiatore di calore
DE102014217704A1 (de) * 2014-09-04 2016-03-10 Robert Bosch Gmbh Vorrichtung zur Aufnahme und Speicherung von Wärmeenergie sowie ein entsprechendes Herstellungsverfahren
CN111076595B (zh) * 2020-01-10 2020-12-08 山东华昱压力容器股份有限公司 一种板管式熔融盐蓄热部件及其蓄热罐
CN111440597A (zh) * 2020-05-21 2020-07-24 中山大学 一种用于相变蓄冷的电沉积泡沫金属及其制备方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248291A (en) * 1978-10-18 1981-02-03 Seymour Jarmul Compact thermal energy reservoirs
US4942654A (en) * 1989-05-24 1990-07-24 General Motors Corporation Method for assembly of serpentine heat exchanger
US6003320A (en) * 1996-10-30 1999-12-21 Kabushiki Kaisha Toshiba Cold accumulating material for extremely low temperature cold, refrigerator using the same and heat shielding member
US6247522B1 (en) * 1998-11-04 2001-06-19 Baltimore Aircoil Company, Inc. Heat exchange members for thermal storage apparatus
US6621702B2 (en) * 2002-01-25 2003-09-16 Lockheed Martin Corporation Method and apparatus for absorbing thermal energy
US20040069456A1 (en) * 2002-09-11 2004-04-15 Webasto Thermosysteme International Gmbh Cold or heat accumulator and process for its manufacture
US6892803B2 (en) * 2002-11-19 2005-05-17 Modine Manufacturing Company High pressure heat exchanger
US6959758B2 (en) * 2002-12-03 2005-11-01 Modine Manufacturing Company Serpentine tube, cross flow heat exchanger construction

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19814585A1 (de) * 1997-08-22 1999-02-25 Ford Global Tech Inc Abgassystem
DE10007848A1 (de) * 2000-02-21 2001-08-23 Thomas Freitag Latentwärmespeicher mit einer offenporigen Metallschaum-Matrix
DE10242463B4 (de) * 2002-09-11 2006-07-06 Webasto Ag Kälte-/Wärmespeicher für eine Klimaeinrichtung
DE10306048B4 (de) * 2003-02-13 2007-09-27 Webasto Ag Klimatisierungssystem für ein Kraftfahrzeug

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248291A (en) * 1978-10-18 1981-02-03 Seymour Jarmul Compact thermal energy reservoirs
US4942654A (en) * 1989-05-24 1990-07-24 General Motors Corporation Method for assembly of serpentine heat exchanger
US6003320A (en) * 1996-10-30 1999-12-21 Kabushiki Kaisha Toshiba Cold accumulating material for extremely low temperature cold, refrigerator using the same and heat shielding member
US6247522B1 (en) * 1998-11-04 2001-06-19 Baltimore Aircoil Company, Inc. Heat exchange members for thermal storage apparatus
US6621702B2 (en) * 2002-01-25 2003-09-16 Lockheed Martin Corporation Method and apparatus for absorbing thermal energy
US20040069456A1 (en) * 2002-09-11 2004-04-15 Webasto Thermosysteme International Gmbh Cold or heat accumulator and process for its manufacture
US6892803B2 (en) * 2002-11-19 2005-05-17 Modine Manufacturing Company High pressure heat exchanger
US6959758B2 (en) * 2002-12-03 2005-11-01 Modine Manufacturing Company Serpentine tube, cross flow heat exchanger construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100008423A1 (it) 2021-04-06 2022-10-06 Olivieri Paolo Sistema modulare per l’accumulo di energia termica.

Also Published As

Publication number Publication date
DE102005039672A1 (de) 2007-03-01
WO2007022761A1 (de) 2007-03-01

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Owner name: WEBASTO AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KRAMER, WOLFGANG;KHELIFA, NOUREDDINE;REEL/FRAME:020701/0750;SIGNING DATES FROM 20080305 TO 20080310

STCB Information on status: application discontinuation

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