EP3572752A1 - Échangeur de chaleur à faisceau tubulaire - Google Patents

Échangeur de chaleur à faisceau tubulaire Download PDF

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Publication number
EP3572752A1
EP3572752A1 EP19175870.5A EP19175870A EP3572752A1 EP 3572752 A1 EP3572752 A1 EP 3572752A1 EP 19175870 A EP19175870 A EP 19175870A EP 3572752 A1 EP3572752 A1 EP 3572752A1
Authority
EP
European Patent Office
Prior art keywords
shell
tube bundle
heat exchanger
tube
tubes
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
EP19175870.5A
Other languages
German (de)
English (en)
Other versions
EP3572752B1 (fr
Inventor
Cesare BARBE'
Mauro LUPPI
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.)
Roen Est SpA
Eurochiller SRL
Original Assignee
Roen Est SpA
Eurochiller SRL
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 Roen Est SpA, Eurochiller SRL filed Critical Roen Est SpA
Publication of EP3572752A1 publication Critical patent/EP3572752A1/fr
Application granted granted Critical
Publication of EP3572752B1 publication Critical patent/EP3572752B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28D7/16—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 in parallel spaced relation
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines

Definitions

  • the present disclosure relates to heat exchangers and more particularly to a tube bundle heat exchanger of dry expansion type where a fluid changing its state under pressure is contained in a delivery chamber to be heated/cooled with change of state by means of another fluid at liquid state, contained in the shell, and where the delivery chamber and the suction chamber of the heat exchanger and are delimited from distinct and separate walls from each other and from the shell, and they are all lapped by air of the atmosphere of the surrounding environment outside the shell of the exchanger.
  • the tube bundle and shell heat exchangers are well known and widely used to cool/heat fluids.
  • These exchangers comprise a shell surrounding a tube bundle, in which a first fluid, for example water, or a mixture of glycols or yet another suitable liquid (e.g. oil), which flows in the space delimited between the inner surface of the shell and the outer surfaces of the pipes, is heated/cooled by a second fluid that flows inside the tube bundle, for example a pressurized fluid that changes state (like Freon) when it crosses the tube bundle.
  • evaporators are called dry expansion evaporators when the heat exchange surface is lapped externally by the first fluid, that transfers or absorbs heat, for example water.
  • the holes 3 in the tube plate 2 are made so as to flow into a delivery chamber to which the tubes of the tube bundle draw: the second fluid, conveyed through a delivery conduit 4, passes in the delivery chamber and from there it is distributed equally among all the tubes 1 passing through the holes 3.
  • the delivery chamber is made by a head wall 5 shaped so as to define at least one concave profile 6 on the surface facing the tube plate 2 of the shell, as shown in Figure 2 .
  • the head wall 5 is bolted against the tube plate 2 of the shell, so that the concave profile 6 of the head wall 5 forms with the tube plate 2 a cavity that is filled with the second fluid from the duct 4, to distribute the second fluid, which will change its state, among the various tubes of the bundle 1 that flow into it.
  • other concave profiles 7 are defined which form, with the tube plate 2, the suction chambers in which the second fluid is collected, which is sucked from the return conduits 8.
  • the prior document FR1335130 shows a heat exchanger in which the delivery chamber and the suction chamber are not delimited by distinct and separate walls, but coexist inside to a same dome-shaped tube plate, equipped with internal separation partitions. Moreover, as in the prior art heat exchanger of Figure 1 discussed above, also the heat exchanger described in FR1335130 document has the tube plate (indicated by reference number 7) separated by a tube plate (indicated with reference numeral 4), thus it is subject to the most onerous certification procedure too.
  • the document US2006/266504 shows (see Figures 2 and 4 ) the tube plate (indicated with the reference 201) illustrated in the attached figure 1 , bolted to a tube plate (indicated with the reference 115) to define two delivery chambers and two suction chambers.
  • the delivery/suction chamber is in the shape of a funnel having a fitting from the tapered end of the funnel to the delivery/return conduit and a plurality of outlet holes from the enlarged end of the funnel, each hole being connected to a respective tube of the tube bundle.
  • the delivery/suction chamber has an inlet opening to which there may be connected a supply conduit of a second fluid under pressure, which will change state, and a plurality of tubular outputs in fluid communication with respective tubes of the tube bundle, in which the tubular outputs are directly fixed to the respective terminations of tubes by brazing, welding, gluing, mechanical expansion or mechanical connection.
  • a heat exchanger of the present disclosure comprises several delivery/suction chambers, each having a tubular inlet, to be connected to a delivery/aspiration duct of a second pressurized fluid, which will change state, and a plurality of tubular outlets directly fixed to respective pipe terminations by brazing, welding, gluing, mechanical expansion or mechanical connection.
  • An evaporator is realized by filling with water the containment volume defined by the shell, in which the tube bundle is contained.
  • FIG. 3 and 4 An evaporator of the dry-expansion tube bundle type according to the present disclosure is illustrated in Figures 3 and 4 .
  • it has an outer shell 9 which defines a containment volume filled of a first fluid in a liquid state to be cooled/heated, in which a tube bundle 1 is immersed, inside which a second fluid circulates under pressure (for example freon or other similar fluids) to be heated/cooled with change of state.
  • a second fluid for example freon or other similar fluids
  • the first fluid in the liquid state is entered through the inlet duct, which for example may be the duct 10 (or the duct 11) placed above (below) the evaporator in the example of the figures, and is discharged through the outlet duct, which for example can be the duct 11 (or the duct 10) located below (above) the evaporator in the example of the figures.
  • the inlet duct which for example may be the duct 10 (or the duct 11) placed above (below) the evaporator in the example of the figures
  • the outlet duct which for example can be the duct 11 (or the duct 10) located below (above) the evaporator in the example of the figures.
  • the tubes 1 of the tube bundle are U-shaped so that the inlet ends 12 of the second fluid in the tube bundle 1 and the outlet ends 13 of the second fluid from the tube bundle all pass through the same tube plate 2 of the shell 9, as shown in the figures.
  • the tubes are substantially straight and cross the shell 9 longitudinally, entering from the tube plate 2 and coming out of a wall longitudinally opposite to the tube plate.
  • separating partitions (not shown) will be installed which define a zig-zag path of the first fluid in the liquid state to be cooled/heated so that it passes through the inlet duct 10 to the outlet duct 11, passing repeatedly between the tubes in a countercurrent direction with respect to the pressurized gas circulating in the pipes, so as to maximize the heat exchange efficiency.
  • the configuration in equicurrent can be realized by reversing the flow of one of the two fluids.
  • the evaporator can be supported by feet 14, fixed to the tube plate 2, which keep it raised from ground, as shown in figures 3 and 4 , or it may have rings fixed to the shell 9, as shown in figures 7 and 8 , in order to be supported by hooks.
  • the evaporator of the present disclosure has one or more delivery chambers 6 connected to a delivery conduit 4 through which the second pressurized fluid is conveyed, which will change state as it passes through the tube bundle.
  • the tubes of the tube bundle flow into the delivery chamber 6, and are individually fixed to it through corresponding waterproof connections.
  • the tubes of the tube bundle that protrude from the tube plate 2 the shell 9, are fixed in a waterproof manner to corresponding connections of the delivery chamber 6, thus the delivery chamber 6 is entirely part of the circuit through which the second pressurized fluid to be heated/cooled circulates with state change and does not share any wall with the circuit of the first fluid at the liquid state to be cooled/heated contained in the shell.
  • the suction chamber 7 will be realized as the delivery chamber 6, with a plurality of inflow openings of the second fluid, coming from the tubes of the tube bundle heat exchanger, and an outflow opening placed in fluid communication with a return conduit 8 of the second fluid.
  • the two suction chambers 7 shown in Figures 3 and 4 have distinct walls separated from the shell 9 and at a distance from it, so that all the surfaces of the suction chamber 7 are lapped by the air of the environment in which the evaporator is installed and do not have any wall wetted by the first fluid in the liquid state.
  • the apical portion 17a can be fixed to the respective tube of the tube bundle 1, expanded in the hole 3 of the tube plate 2, by gluing, or by mechanical expansion or mechanical connection.
  • the apical portion 17a will have a truncated conical shape so as to guide the insertion of the tubular outlet 16 keeping it centered with respect to the hole 3 until the protrusion 17b is not against the tube plate 2.
  • the shape of the delivery chamber 6, as well as of the suction chamber 7, can be any, as schematically shown in the profile views of figures 5a to 5c and in the corresponding semitransparent perspective views of figures 6a to 6c , which illustrate delivery chambers 6 or suction chambers 7 in the form of a parallelepiped ( figures 5a and 6a ), in the form of a hollow cylinder ( figures 5c and 6c ), or in the shape of a funnel ( figures 5b and 6b ), all provided with tubular outlets 16.
EP19175870.5A 2018-05-22 2019-05-22 Échangeur de chaleur à faisceau tubulaire Active EP3572752B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000005579A IT201800005579A1 (it) 2018-05-22 2018-05-22 Scambiatore di calore a fascio tubiero

Publications (2)

Publication Number Publication Date
EP3572752A1 true EP3572752A1 (fr) 2019-11-27
EP3572752B1 EP3572752B1 (fr) 2021-01-06

Family

ID=63312282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19175870.5A Active EP3572752B1 (fr) 2018-05-22 2019-05-22 Échangeur de chaleur à faisceau tubulaire

Country Status (3)

Country Link
EP (1) EP3572752B1 (fr)
ES (1) ES2870501T3 (fr)
IT (1) IT201800005579A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021167761A1 (fr) * 2020-02-21 2021-08-26 Exxonmobil Chemical Patents Inc. Systèmes de refroidissement de gaz de dégagement recyclé dans la production de polyéthylène basse densité

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1335130A (fr) 1962-07-06 1963-08-16 Perfectionnements apportés à la construction des échangeurs de chaleur
US3800867A (en) 1970-06-05 1974-04-02 Woodall Duckham Ltd Through flow fluid treatment apparatus
US20050061025A1 (en) 2003-09-23 2005-03-24 Ayub Zahid Hussain End bonnets for shell and tube dx evaporator
US20060266504A1 (en) 2005-05-31 2006-11-30 York International Corporation Direct expansion cooler high velocity dished head

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1335130A (fr) 1962-07-06 1963-08-16 Perfectionnements apportés à la construction des échangeurs de chaleur
US3800867A (en) 1970-06-05 1974-04-02 Woodall Duckham Ltd Through flow fluid treatment apparatus
US20050061025A1 (en) 2003-09-23 2005-03-24 Ayub Zahid Hussain End bonnets for shell and tube dx evaporator
US20060266504A1 (en) 2005-05-31 2006-11-30 York International Corporation Direct expansion cooler high velocity dished head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021167761A1 (fr) * 2020-02-21 2021-08-26 Exxonmobil Chemical Patents Inc. Systèmes de refroidissement de gaz de dégagement recyclé dans la production de polyéthylène basse densité

Also Published As

Publication number Publication date
ES2870501T3 (es) 2021-10-27
EP3572752B1 (fr) 2021-01-06
IT201800005579A1 (it) 2019-11-22

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