WO2009024436A1 - Échangeur de chaleur à plusieurs fluides - Google Patents

Échangeur de chaleur à plusieurs fluides Download PDF

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Publication number
WO2009024436A1
WO2009024436A1 PCT/EP2008/059915 EP2008059915W WO2009024436A1 WO 2009024436 A1 WO2009024436 A1 WO 2009024436A1 EP 2008059915 W EP2008059915 W EP 2008059915W WO 2009024436 A1 WO2009024436 A1 WO 2009024436A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
passages
heat
pluralities
fluid
Prior art date
Application number
PCT/EP2008/059915
Other languages
English (en)
Inventor
Stefano Bernardinello
Andrea Bottazzo
Original Assignee
M.T.A. S.P.A.
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 M.T.A. S.P.A. filed Critical M.T.A. S.P.A.
Publication of WO2009024436A1 publication Critical patent/WO2009024436A1/fr

Links

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
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • 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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water
    • 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
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0038—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for drying or dehumidifying gases or vapours

Definitions

  • the present invention relates to a heat exchanger of the type having the features mentioned in the preamble of the principal claim. Technological background
  • each of the three passages is in thermal contact with both of the other two passages. More specifically, there is a known way of producing plate heat exchangers in which corresponding passages are formed for water to be cooled and for two coolant fluids, these heat exchangers being typically incorporated into air conditioning systems, or into other systems in which water is used as a cold working fluid.
  • each of the two passages intended for corresponding coolant fluids forms part of a corresponding cooling circuit, comprising a compressor or a plurality of compressors arranged in parallel.
  • both of the cooling circuits can be shut down for limited periods when the requisite thermal power is very small, without adversely affecting the operation of the system in which the heat exchanger is incorporated. This is because a sufficient power level for the operation of the system is provided by the water at low temperature in these conditions.
  • the solution described above enables the overall efficiency of the system to be improved with respect to other systems which have a single cooling circuit with a single compressor and a pipe placed between the outlet and inlet of the compressor to recycle some of the coolant fluid and thus decrease the flow rate at the entry to the heat exchanger.
  • the main drawback of this solution is that, where it is used with fluids having low heat capacity, such as compressed gases and particularly air for drying, it is not possible to shut down both of the cooling circuits completely, even for brief periods. Description of the invention
  • the principal object of the present invention is to provide a multi-fluid heat exchanger which is structurally and functionally designed to overcome all the drawbacks of the cited prior art.
  • FIG. 1 is a schematic axonometric view of a multi-fluid heat exchanger constructed according to the invention
  • FIG. 2 is a schematic sectional view of the heat exchanger of Figure
  • a multi-fluid heat exchanger 1 comprises a plurality of superimposed modular elements, formed by a plurality of corrugated plates 2.
  • the heat exchanger 1 is incorporated in a system (not shown) for drying compressed air.
  • the heat exchanger 1 comprises two ends 2a, b, in which are formed two apertures 3 and 4, for the inflow and outflow of a coolant fluid respectively, and two apertures 5 and 6, for the inflow and outflow, respectively, of a heat-carrying substance in the fluid state.
  • This heat-carrying substance is preferably composed of a mixture of water and glycol, for example a mixture of water and glycol with a percentage of glycol in the range from 10% to 20%. In general, any fluid having a high heat capacity can be used in place of the mixture of water and glycol, in other variant embodiments of the invention.
  • the apertures 3, 4, 5 and 6 are connected to corresponding pipes (not shown) of the compressed air drying system.
  • the apertures 3 and 4 can be connected to a cooling circuit comprising a plurality of compressors in parallel, which are not shown.
  • the heat exchanger 1 also comprises an inlet 7 for a flow of moist air to be dried, an outlet 8 for a flow of cold dry air and an outlet 9 for a flow of dry air at ambient temperature.
  • the heat exchanger 1 also contains a condensate separator device (not shown) of a known type. The cold air from which the condensate has been removed flows out of the heat exchanger at an outlet 10 and is sent through a pipe 11, shown schematically in Figure 1, to the inlet 8.
  • the corrugated plates 2 form a first plurality of passages 12 in which the coolant fluid flows, a second plurality of passages 13 in which the heat-carrying substance in the fluid state flows, and a third plurality of passages 14 in which moist air for drying flows.
  • the plurality of passages 12, 13 and 14 are placed in corresponding superimposed rows which alternate with each other, in such a way that each of them is in thermal contact with the other two through the walls of the plates 2 (see the diagram in Figure 2).
  • each of the rows of passages formed by the plates 2 comprises a plurality of passages 12a, b in which the coolant fluid flows, a plurality of passages 13a, b in which the heat-carrying substance in the fluid state flows, and a third plurality of passages 14a, b in which the moist air for drying flows.
  • the passages 12a, 13a and 14a are placed side by side in groups of three, thus forming sets of three passages through which the same fluid flows.
  • the passages 12b, 13b and 14b are placed side by side in groups of four, thus forming sets of four passages through which the same fluid flows.
  • a multi-fluid heat exchanger according to the present invention comprises a plurality of superimposed modular elements, formed by a plurality of extruded sections or plates, or fins, or shaped panels, which are fixed to each other.
  • these modular elements are made from aluminium alloy, they are preferably fixed together by furnace brazing.
  • the cooling circuit can be used to cool both the working fluid and the fluid heat-carrying substance. If the requisite thermal power is small, the cold accumulated in the heat-carrying substance can conveniently be used to enable the system to operate even when the cooling circuit is shut down.
  • the invention resolves the problem of the aforementioned prior art, while also offering numerous benefits. These benefits include the possibility of producing heat exchangers having a high heat exchange efficiency, regardless of the heat capacity of the working fluid.

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'invention concerne un échangeur de chaleur (1) qui comprend une pluralité d'éléments modulaires superposés (2), grâce auxquels au moins trois pluralités de passages (12, 13, 14), qui sont séparées les unes des autres, sont formées dans l'échangeur de chaleur, chacune des pluralités de passages étant en contact thermique avec au moins deux des autres pluralités de passages, et un gaz, un fluide de refroidissement et une substance caloporteur dans le fluide étant amenés à circuler à travers des pluralités respectives des trois pluralités de passages.
PCT/EP2008/059915 2007-08-20 2008-07-29 Échangeur de chaleur à plusieurs fluides WO2009024436A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000279A ITPD20070279A1 (it) 2007-08-20 2007-08-20 Scambiatore di calore multifluido
ITPD2007A000279 2007-08-20

Publications (1)

Publication Number Publication Date
WO2009024436A1 true WO2009024436A1 (fr) 2009-02-26

Family

ID=39944371

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/059915 WO2009024436A1 (fr) 2007-08-20 2008-07-29 Échangeur de chaleur à plusieurs fluides

Country Status (2)

Country Link
IT (1) ITPD20070279A1 (fr)
WO (1) WO2009024436A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20120365A1 (it) 2012-12-05 2014-06-06 Blue Box Group S R L Scambiatore di calore

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462113A (en) * 1994-06-20 1995-10-31 Flatplate, Inc. Three-circuit stacked plate heat exchanger
WO1997008506A1 (fr) * 1995-08-23 1997-03-06 Swep International Ab Echangeur thermique a plaques a trois circuits
WO1999046550A1 (fr) * 1998-03-11 1999-09-16 Swep International Ab Echangeur a plaques a trois circuits
US5974817A (en) * 1997-09-15 1999-11-02 Technotrans Ag Assembly for controlling the temperature of a fountain fluid and/or selected rollers of a printing machine
DE102004020602A1 (de) * 2004-04-27 2005-12-01 Mahle Filtersysteme Gmbh Plattenwärmetauscher mit Strömungswegen für drei Wärmetauschfluide
EP1616610A1 (fr) * 2004-07-13 2006-01-18 Byeong-Seung Lee Echangeur de chaleur à plaques avec dispositif d'évacuation de condensat et son procédé de fabrication

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462113A (en) * 1994-06-20 1995-10-31 Flatplate, Inc. Three-circuit stacked plate heat exchanger
WO1997008506A1 (fr) * 1995-08-23 1997-03-06 Swep International Ab Echangeur thermique a plaques a trois circuits
US5974817A (en) * 1997-09-15 1999-11-02 Technotrans Ag Assembly for controlling the temperature of a fountain fluid and/or selected rollers of a printing machine
WO1999046550A1 (fr) * 1998-03-11 1999-09-16 Swep International Ab Echangeur a plaques a trois circuits
DE102004020602A1 (de) * 2004-04-27 2005-12-01 Mahle Filtersysteme Gmbh Plattenwärmetauscher mit Strömungswegen für drei Wärmetauschfluide
EP1616610A1 (fr) * 2004-07-13 2006-01-18 Byeong-Seung Lee Echangeur de chaleur à plaques avec dispositif d'évacuation de condensat et son procédé de fabrication

Also Published As

Publication number Publication date
ITPD20070279A1 (it) 2009-02-21

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