EP1995542A2 - Dispositif échangeur de chaleur - Google Patents

Dispositif échangeur de chaleur Download PDF

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Publication number
EP1995542A2
EP1995542A2 EP08156712A EP08156712A EP1995542A2 EP 1995542 A2 EP1995542 A2 EP 1995542A2 EP 08156712 A EP08156712 A EP 08156712A EP 08156712 A EP08156712 A EP 08156712A EP 1995542 A2 EP1995542 A2 EP 1995542A2
Authority
EP
European Patent Office
Prior art keywords
heat exchange
fluid
tubular
tubular element
exchange device
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.)
Withdrawn
Application number
EP08156712A
Other languages
German (de)
English (en)
Other versions
EP1995542A3 (fr
Inventor
Giovanni Lai
Bruno Destro
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.)
Emiflex SpA
Original Assignee
Emiflex SpA
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 Emiflex SpA filed Critical Emiflex SpA
Publication of EP1995542A2 publication Critical patent/EP1995542A2/fr
Publication of EP1995542A3 publication Critical patent/EP1995542A3/fr
Withdrawn legal-status Critical Current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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/103—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial 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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/08—Tubular elements crimped or corrugated in longitudinal section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators

Definitions

  • the present invention concerns a heat exchange device installable in a heating plant provided with a heating source, in which, by means of heat exchange through convection, the variation in temperature of a determinate fluid, for example water, intended for a user, is induced.
  • a determinate fluid for example water
  • the device according to the present invention is of the type advantageously but not exclusively able to be associated with a boiler, for the production of domestic hot water.
  • Heat exchange devices are known, able to allow the heat exchange between a first fluid, for example domestic water to be heated, and a second fluid, for example arriving from a heating source, such as a boiler or other.
  • heat exchange devices are known in which a second tubular pipe is disposed inside a first cylindrical cavity of a first tubular pipe, so as to define with the latter an interstice for the passage of the fluid to be heated, and thus effect the desired heat exchange.
  • This disadvantage entails a substantially reduced yield of the heat exchange effected, and high heat dissipation, and therefore a waste of energy.
  • a prior art heat exchanger device for the cooling of gas and oil of a motor of a vehicle is disclosed in EP-A-1.388.720 .
  • the device comprises two coaxial tubular pipes, wherein only the inner pipe has an external corrugated surface for increasing the thermal exchange between the two fluids.
  • Purpose of the present invention is to achieve a heat exchange device which allows, in a simple and economic manner, to improve the heat exchange effected, reducing to a minimum the possible heat dissipations and the bulk of the device itself.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a heat exchange device comprises at least a first tubular pipe having inside it a cylindrical cavity in which a first fluid to be heated flows and at least a second tubular pipe in which a second heated fluid flows.
  • the device is advantageously associated with a heating boiler, or other heating source, and is applied for the production of domestic hot water.
  • the second tubular pipe is disposed coaxial and inside the first cylindrical cavity of the first tubular pipe, so as to define with the first pipe a first annular interstice for the first fluid to pass through.
  • the second tubular pipe comprises inside it a second cylindrical through cavity able to define another passage for the first fluid, so as to allow the latter to flow both outside the second tubular pipe, through the first annular interstice, and also inside the second tubular pipe, through the second cylindrical cavity.
  • the heat exchange between the first fluid and the second fluid occurs substantially both inside and outside the second tubular pipe, substantially doubling the yield of the heat exchange effected and reducing to a minimum the possible heat dissipation and the bulk of the heat exchanger itself.
  • the second tubular pipe comprises a first external tubular element which defines with the first cylindrical cavity of the first tubular pipe said first annular interstice, and a second tubular element disposed coaxial and inside the first tubular element, which defines the second cylindrical cavity of the second tubular pipe.
  • the first tubular element and the second tubular element are separated from each other so as to define a second annular interstice which allows the second heated fluid to pass.
  • the first tubular element and the second tubular element have respective corrugated surfaces in contact with the first fluid and the second fluid.
  • the corrugated surfaces allow to increase the usable surface of heat exchange between the two fluids and induce the fluids themselves to an advantageous turbulent motion.
  • corrugations of both the first and the second tubular elements lay on planes substantially parallel each other and substantially transversal to the direction of motion of the first and second fluids.
  • the corrugated surfaces of the two coaxial tubular elements develop as parallel waves, contrary to a spiral or helicoidal way typical of the prior art corrugated pipes.
  • the transversal development of the corrugations of both the surfaces of contact with the fluids allows to create a slow movement of the fluids, contrary to the helicoidal development.
  • the first tubular element and the second tubular element are reciprocally connected at the ends by means of respective inlet and outlet flanges provided with relative inlet and outlet apertures.
  • at least the inlet apertures have a desired orientation able to impart to the second fluid a desired direction of inlet inside the second annular interstice, and hence a desired direction of impact against the first and second tubular element, improving the heat exchange.
  • each heat exchange device comprises connection means, able to allow reciprocal connection to an analogous heat exchange device.
  • a heat exchange device 10 according to the present invention is shown in its entirety in fig. 1 .
  • an application is shown in which two analogous heat exchange devices 10 are provided, connected in series.
  • the numerical references to equivalent components are also shown on the heat exchanger 10 illustrated on the left.
  • the heat exchanger 10 comprises a first pipe 11 having axially a first cylindrical cavity 12, inside which cold domestic water to be heated is able to be introduced, under pressure, through a feed collector 13; the direction of flow of the water is indicated by the arrows in continuous line. Once it has passed through the first pipe, the cold water is conveyed into a relative outlet collector 15.
  • the heat exchanger 10 also comprises a second pipe 16 disposed substantially coaxial and inside the first cylindrical cavity 12 of the first pipe 11, so as to define with the latter a first annular interstice 17 through which the domestic water to be heated flows.
  • the second pipe 16 is also shaped so as to define inside it a second cylindrical cavity 19, inside which the water to be heated is free to flow in through manner.
  • the second pipe 16 consists of an external tube 20 distanced from an internal surface of the first pipe 11, to define the first annular interstice 17, and an internal tube 21, disposed coaxial and inside the external pipe 20 and defining the second cylindrical cavity 19.
  • the external tube 20 and the internal tube 21 are distanced from each other so as to define a second annular interstice 22, into which hot water is introduced, under pressure, through a relative feed collector 23; the direction of flow of the hot water is indicated by the arrows shown with a line of dashes.
  • the hot water flowing inside the second annular interstice 22 effects a double heat exchange with the cold water flowing both inside the first annular interstice 17 and also inside the second cylindrical cavity 19.
  • the hot water flowing inside the second annular interstice 22 flows in a discordant direction to that of the cold water flowing inside both the first annular interstice 17 and the second cylindrical cavity 19.
  • both the external tube 20 and the internal tube 21 are corrugated on the outside, the corrugations being substantially transversal to the direction of motion of the fluids, so as to increase the usable surface of heat exchange and influence the flow of the hot water the water to be heated, determining a turbulent motion.
  • the corrugation of the external tube 20 has a first pitch P1, greater than a second pitch P2 of the corrugation of the internal tube 21.
  • This variation in pitch of the corrugation of the two tubes 20 and 21 is chosen as a function of the flow rate of water flowing in the relative first annular interstice 17 and second cylindrical cavity 19, the heat exchange to be effected and/or other parameters.
  • the external tube 20 and the internal tube 21 are interconnected at the ends and kept reciprocally distanced by means of two flanges, respectively an inlet flange 25 and an outlet flange 26.
  • the inlet flange 25 comprises a plurality of inlet holes 27 made through and angularly distanced from each other, to allow the hot water to enter inside the second annular interstice 22.
  • the inlet holes 27 are orientated in such a manner as to induce the hot water to flow inside the second annular interstice 22, directly contacting the internal part of the external tube 20, thus further improving the conditions of heat exchange.
  • the outlet flange 26 also comprises relative outlet holes 29 made through and angularly distanced from each other, to allow the hot water to exit from the second annular interstice 22, towards a relative outlet collector 30.
  • the outlet collectors 15 and 20, respectively of the cold water heated by the heat exchange device 10 on the right, and the hot water from the heat exchange device 10 on the left, are directly connected to the respective feed collectors 13 and 23 of the respective adjacent heat exchange device 10, so that the cold water to be heated and the hot water effect two cycles of heat exchange.
  • connection pipes 31 and 32 are made by means of relative connection pipes 31 and 32.
  • the two heat exchange devices 10 are disposed substantially one above the other, with the first pipes 11, in this case in the form of a tank, connected with each other by means of a relative connection pipe 31.
  • the two second pipes 16, on the contrary, are separated from each other so as to define two distinct heating circuits for the cold water circulating in the first pipes 11.
  • the feed collector 13 and the outlet collector 15 for the water are not visible.
  • each heat exchange device provides, inside its first pipe 11, two or more second pipes 16, connected with each other, or independent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP08156712A 2007-05-24 2008-05-22 Dispositif échangeur de chaleur Withdrawn EP1995542A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUD20070087 ITUD20070087A1 (it) 2007-05-24 2007-05-24 Dispositivo scambiatore di calore

Publications (2)

Publication Number Publication Date
EP1995542A2 true EP1995542A2 (fr) 2008-11-26
EP1995542A3 EP1995542A3 (fr) 2009-07-08

Family

ID=38752570

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156712A Withdrawn EP1995542A3 (fr) 2007-05-24 2008-05-22 Dispositif échangeur de chaleur

Country Status (2)

Country Link
EP (1) EP1995542A3 (fr)
IT (1) ITUD20070087A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20100341A1 (it) * 2010-06-23 2011-12-24 Consiglio Per La Ricerca E La Sperimentazione In Dispositivo e procedimento per la gestione del flusso dei fluidi nelle tubazioni coassiali degli impianti idraulici di condizionamento termico, in particolare in agricoltura.
CN102425814A (zh) * 2011-12-02 2012-04-25 中铁建设集团有限公司 冷源机房用强化对流换热型分集水装置
WO2022175566A1 (fr) * 2021-02-16 2022-08-25 Proyectos Y Montajes Industriales Menxi S.R.L. Échangeur de chaleur et système de réfrigération

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2114695A (en) * 1982-02-10 1983-08-24 Schulz & Co Kg Pipe line connector
EP1388720A2 (fr) 2002-08-08 2004-02-11 Mahle Tennex Corporation Echangeur de chaleur à triple tubes et sa méthode de fabrication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190505943A (en) * 1905-03-21 1905-09-14 Edward Henry Beckett Improvements in Hot Water Heating Apparatus
GB158483A (en) * 1920-04-30 1921-02-10 William Albert White A new or improved heat exchanger
DE3100021C2 (de) * 1981-01-02 1984-10-31 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffkühler für eine Brennkraftmaschine
AU1153688A (en) * 1986-12-30 1988-07-27 W. Schmidt Gmbh & Co. Kg Heat exchanger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2114695A (en) * 1982-02-10 1983-08-24 Schulz & Co Kg Pipe line connector
EP1388720A2 (fr) 2002-08-08 2004-02-11 Mahle Tennex Corporation Echangeur de chaleur à triple tubes et sa méthode de fabrication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20100341A1 (it) * 2010-06-23 2011-12-24 Consiglio Per La Ricerca E La Sperimentazione In Dispositivo e procedimento per la gestione del flusso dei fluidi nelle tubazioni coassiali degli impianti idraulici di condizionamento termico, in particolare in agricoltura.
CN102425814A (zh) * 2011-12-02 2012-04-25 中铁建设集团有限公司 冷源机房用强化对流换热型分集水装置
WO2022175566A1 (fr) * 2021-02-16 2022-08-25 Proyectos Y Montajes Industriales Menxi S.R.L. Échangeur de chaleur et système de réfrigération

Also Published As

Publication number Publication date
ITUD20070087A1 (it) 2008-11-25
EP1995542A3 (fr) 2009-07-08

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