WO2017007351A1 - Échangeur de chaleur à condensation - Google Patents

Échangeur de chaleur à condensation Download PDF

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Publication number
WO2017007351A1
WO2017007351A1 PCT/PL2016/000070 PL2016000070W WO2017007351A1 WO 2017007351 A1 WO2017007351 A1 WO 2017007351A1 PL 2016000070 W PL2016000070 W PL 2016000070W WO 2017007351 A1 WO2017007351 A1 WO 2017007351A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
dents
section
flue tube
exchanger according
Prior art date
Application number
PCT/PL2016/000070
Other languages
English (en)
Inventor
Krzyszto SZCZEPAŃSKI
Maciej BERNACIAK
Original Assignee
Aic Społka Akcyjna
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 Aic Społka Akcyjna filed Critical Aic Społka Akcyjna
Publication of WO2017007351A1 publication Critical patent/WO2017007351A1/fr

Links

Classifications

    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/424—Means comprising outside portions integral with inside portions
    • F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
    • 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
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-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
    • 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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
    • 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
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation

Definitions

  • the invention concerns a condensing heat exchanger designated for central heating and utility water installations.
  • heat exchangers featuring a set of tube elements for the flow of hot fumes, fitted between two sieve walls in a chamber encased in an external jacket, where the heated water is supplied to the chamber through the inlet stub tube fitted in the lower section of the outer jacket and is discharged through the outlet stub tube fitted in the upper section of the outer jacket, and thus circulates inside the chamber.
  • the combustion chamber is placed above the upper sieve bottom, and under the lower sieve bottom there is a condensate collecting bowl.
  • a heat exchanger comprising an outer jacket which encases a set of vertical tubee elements anchored in sieve walls on both ends, a gas combustion chamber positioned over the upper sieve wall, and baffles which are mounted perpendicular to the tube elements, with openings through which the tube elements run, plus liquid inlet and outlet stub tubes fitted in the side wall of the outer jacket.
  • the purpose of the invention is to improve heat exchange
  • the purpose of the invention is to develop a flue tube for a fired condensing heat exchanger which would intensify the heat exchange process, at the same time reducing the combustion gas flow resistance and retaining the condensing nature of the processes which occur in the exchanger, all of which would allow to reduce the heat exchanger size.
  • a condensing heat exchanger comprising a combustion chamber fitted in its top section which features an opening for inserting the burner, as well as flue tubes anchored in the sieve bottoms and encased in an outer jacket, where the jacket is fitted with stub tubes for the supply and discharge of the heated fluid, and inside the jacket there is a chamber for the heated liquid, a condensate container fitted with the condensate discharge stub tube and a stub tube for the discharge of fumes to the vent, according to the invention is characterised in that the flue tubes feature dents formed along the length of the tube, and said dents are pointed towards the centre of the tube, and said dents are positioned opposite each other, and two opposite dents mark out a section, where the distance between the lowest points in the dents measured inside the tube in the section is 1.0 mm or less, and the ratio of the length of the tube to the tube cross section circumference around which the combustion gases flow falls within the range from 2.5 to 6.5.
  • the flue tube is cylindrical in shape in its top and/or bottom section(s).
  • the length of the cylindrical top section of the flue tube ranges from 0.25 to 1.5 of the tube's cross section circumference around which the combustion gases flow.
  • the adjacent dent sections are arranged otherwise than collinearly to each other along the flue tube length, in particular at the angle of 90°.
  • the dent sections are arranged at even distances along the flue tube length, or the distances between the dent sections decrease along the flue tube length.
  • the dents are circular, oval, or drop-like in shape.
  • the cross section of the flue tube in the fragment between the adjacent sections is circular, oval, or square in shape, with rounded apexes and sides indented towards the axis.
  • the designed proportions between the flue tube dimensions and the shape and arrangement of the dents according to the invention ensures retaining the condensing nature of the processes which occur in the exchanger while reducing the flow resistance of the combustion gases inside the tubes and increasing the flow turbulences.
  • Fig.l shows the flue tube in the isometric projection with drop-shaped dents arranged at even distances along the tube length;
  • Fig.2 and Fig.3 show the flue tube as in Fig. 1 in side view;
  • Fig.4 depicts the flue tube as in Fig. 1 in bird's eye view
  • Fig.5 and Fig.6 illustrate the flue tube as in Fig. 1 in axial section
  • Fig.7 shows the flue tube as in Fig.1 in cross section
  • Fig, 8 shows the flue tube in the isometric projection with circular dents arranged at even distances along the tube length
  • Fig.9 and Fig.10 show the flue tube as in Fig. 8 in side view
  • Fig.l 1- depicts the flue tube as in Fig. 8 in bird's eye view
  • Fig.12 and Fig, 13 illustrate the flue tube as in Fig. 8 in axial section
  • Fig.14 shows the flue tube as in Fig.8 in cross section
  • Fig.15 shows the flue tube in the isometric projection with oval dents, arranged at even distances along the tube length
  • Fig.16 and Fig.17 show the flue tube as in Fig. 15 in side view
  • Fig.18 depicts the flue tube as in Fig. 15 in bird's eye view
  • Fig.19 and Fig.20 illustrate the flame pipe as in Fig. 15 in axial section;
  • Fig.21 shows the flue tube as in Fig.15 in cross section;
  • Fig.22 shows the flue tube in the isometric projection with drop-shaped dents arranged at even distances along the tube length in another variant
  • Fig.23 and Fig.24 show the flue tube as in Fig. 22 in side view
  • Fig.25 depicts the flue tube as in Fig. 22 in bird's eye view
  • Fig.26 and Fig.27 illustrate the flue tube as in Fig. 22 in axial section
  • Fig.28 shows the flue tube as in Fig.22 in cross section
  • Fig.29 - shows the flue tube in the isometric projection with circular shaped dents arranged at even distances along the tube length in another variant
  • Fig.30 and Fig.31 show the flue tube as in Fig. 29 in side view
  • Fig.32 depicts the flue tube as in Fig. 29 in bird's eye view
  • Fig.33 and Fig.34 illustrate the flue tube as in Fig. 29 in axial section
  • Fig.35 - shows the flue tube as in Fig.29 in cross section
  • Fig.36 shows the flue tube in the isometric projection with oval dents arranged at even distances along the tube length in another variant
  • Fig.37 and Fig.38 show the flue tube as in Fig. 36 in side view
  • Fig.39 depicts the flue tube as in Fig. 36 in bird's eye view
  • Fig.40 and Fig.41 illustrate the flue tube as in Fig. 36 in axial section
  • Fig.42 shows the flue tube as in Fig.36 in cross section
  • Fig.43 shows the flue tube in the isometric projection with drop-shaped dents arranged at uneven distances along the tube length
  • Fig.44 and Fig.45 show the flue tube as in Fig. 43 in side view
  • Fig.46 depicts the flue tube as in Fig. 43 in bird's eye view
  • Fig.47 and Fig.48 illustrate the flue tube as in Fig. 43 in axial section
  • Fig.49 shows the flue tube as in Fig.43 in cross section
  • Fig.50 shows the flue tube in the isometric projection with circular dents arranged at uneven distances along the pipe length;
  • Fig.51 and Fig.52 show the flame pipe as in Fig, 50 in side view;
  • Fig.53 depicts the flue tube as in Fig. 50 in bird's eye view
  • Fig.54 and Fig.55 illustrate the flue tube as in Fig. 50 in axial section
  • Fig.56 shows the flue tube as in Fig.50 in cross section
  • Fig.57 shows the flue tube in the isometric projection with oval dents arranged at uneven distances along the tube length
  • Fig.58 and Fig.59 show the flue tube as in Fig. 57 in side view
  • Fig.60 depicts the flue tube as in Fig. 57 in bird's eye view
  • Fig.61 and Fig.62 illustrate the flue tube as in Fig. 57 in axial section
  • Fig.63 shows the flue tube as in Fig.57 in cross section
  • Fig.64 shows the flue tube in the isometric projection with drop-shaped dents arranged at uneven distances along the tube length in another variant
  • Fig.65 and Fig.66 show the flue tube as in Fig. 64 in side view
  • Fig.67 depicts the flue tube as in Fig. 64 in bird's eye view
  • Fig.68 and Fig.69 illustrate the flue tube as in Fig. 64 in axial section
  • Fig.70 shows the flue tube as in Fig.64 in cross section
  • Fig.71 shows the flue tube in the isometric projection with circular dents arranged at uneven distances along the tube length in another variant
  • Fig.72 and Fig.73 show the flue tube as in Fig. 71 in side view
  • Fig.74 depicts the flue tube as in Fig. 71 in bird's eye view
  • Fig.75 and Fig.76 illustrate the flue tube as in Fig. 71 in axial section
  • Fig.77 shows the flue tube as in Fig.71 in cross section
  • Fig.78 shows the flue tube in the isometric projection with oval dents arranged at uneven distances along the tube length in another variant
  • Fig.79 and Fig.80 show the flue tube as in Fig. 78 in side view
  • fig.81 depicts the flue tube as in Fig. 78 in bird's eye view
  • Fig.82 and Fig.83 illustrate the flue tube as in Fig. 78 in axial section;
  • Fig.84 shows the flue tube as in Fig.78 in cross section;
  • Fig.85 shows the heat exchanger in axial section.
  • a heat exchanger comprises, in its top section, a combustion chamber 3 which features an opening for inserting the burner, as well as flue tubes 1 anchored in the sieve bottoms 4, 5 and encased in an outer jacket 6, inside which the is a chamber 7 for the heated liquid, where the jacket is fitted with inlet stub tube 8 and outlet stub tube 9 for the supply/ discharge of the heated liquid.
  • a condensate container 10 fitted with a condensate discharge stub tube 11 and a stub tube for the discharge of fumes to the vent 12, as shown on Fig.43 and Fig. 44.
  • the flue tubes 1 feature dents 2 pointing towards the centre of the flue tube 1.
  • the flue tube 1 is cylindrical in shape and the length H of the top section amounts to 1,0 of the tube cross section circumference around which the
  • the dents 2 are drop-like in shape; in other variants which are shown on Figs. 8 to 14 and Figs. 29 to Fig. 35 dents 2 are circular in shape, and in further embodiments shown on Figs. 15 to 21 and Figs. 36 to 42 the shape of the dents 2 is oval.
  • the sections of dents 2 are arranged at uneven distances along the length L of the flue tube in such a way that the distance S between the sections reduces along the tube length.
  • the flue tube 1 in the fragment between the adjacent sections is circular in cross section, and in the variants illustrated on Figs. 22 to 42, and Figs. 64 to 84 the shape of the tube cross section is square with rounded apexes and sides indented towards the axis.
  • the flue tube 1 between the adjacent sections can be oval in cross section.
  • the distance between the lowest points in the dents 2 measured inside the flue tube 1 in the section cannot be larger than 1.0 mm and the ratio of the length L of the flue tube 1 to the tube cross section circumference around which the combustion gases flow ranges from 2.5 to 6.5, and the length of the cylindrical flue tube 1 in its top section ranges from 0.25 to 1.5 of the tube cross section circumference around which the combustion gases flow.

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)
  • Chimneys And Flues (AREA)

Abstract

L'invention concerne un échangeur de chaleur à condensation comprenant une chambre de combustion montée dans sa section supérieure qui présente une ouverture destinée à insérer le brûleur, ainsi que des tubes de fumée ancrés dans les fonds en tamis et logés dans une chemise externe, une chambre étant prévue pour recevoir le liquide chauffé formé à l'intérieur de la chemise, la chemise comportant des tubulures pour l'alimentation et l'évacuation du liquide chauffé, avec un récipient de condensat comprenant la tubulure d'évacuation de condensat et une tubulure pour l'évacuation des fumées vers l'évent, l'échangeur de chaleur à condensation étant caractérisé en ce que les tubes de fumée (1) comportent des creux (2) formés le long de la longueur du tube (1), lesdits creux (2) étant orientés vers le centre du tube (1), lesdits creux (2) étant placés l'un en regard de l'autre, deux creux opposés (2) définissant une section, la distance entre les points le plus bas des creux (2) mesurée à l'intérieur du tube (1) dans ladite section étant inférieure ou égale à 1,0 mm, le rapport de la longueur (L) du tube (1) à la circonférence en section transversale du tube autour de laquelle coulent les gaz de combustion étant compris entre 2,5 et 6,5.
PCT/PL2016/000070 2015-07-05 2016-06-30 Échangeur de chaleur à condensation WO2017007351A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PLP.413023 2015-07-05
PL413023A PL232196B1 (pl) 2015-07-05 2015-07-05 Kondensacyjny wymiennik ciepła

Publications (1)

Publication Number Publication Date
WO2017007351A1 true WO2017007351A1 (fr) 2017-01-12

Family

ID=56611534

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2016/000070 WO2017007351A1 (fr) 2015-07-05 2016-06-30 Échangeur de chaleur à condensation

Country Status (2)

Country Link
PL (1) PL232196B1 (fr)
WO (1) WO2017007351A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3901549A4 (fr) * 2018-12-17 2022-01-19 Qingdao Taitannigao Reactor Co. Ltd Tube de réaction/mélange/échange de chaleur et réacteur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5839505A (en) * 1996-07-26 1998-11-24 Aaon, Inc. Dimpled heat exchange tube
US20020005275A1 (en) * 1998-12-04 2002-01-17 Beckett Gas. Inc. Heat exchanger tube with integral restricting and turbulating structure
PL216290B1 (pl) 2010-10-01 2014-03-31 Aic Społka Akcyjna Wymiennik ciepła
WO2015059537A2 (fr) * 2013-10-11 2015-04-30 Tecnoinox S.R.L. Type amélioré d'échangeur de chaleur pouvant être employé de préférence dans des fours à combustible gazeux

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5839505A (en) * 1996-07-26 1998-11-24 Aaon, Inc. Dimpled heat exchange tube
US20020005275A1 (en) * 1998-12-04 2002-01-17 Beckett Gas. Inc. Heat exchanger tube with integral restricting and turbulating structure
PL216290B1 (pl) 2010-10-01 2014-03-31 Aic Społka Akcyjna Wymiennik ciepła
WO2015059537A2 (fr) * 2013-10-11 2015-04-30 Tecnoinox S.R.L. Type amélioré d'échangeur de chaleur pouvant être employé de préférence dans des fours à combustible gazeux

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3901549A4 (fr) * 2018-12-17 2022-01-19 Qingdao Taitannigao Reactor Co. Ltd Tube de réaction/mélange/échange de chaleur et réacteur

Also Published As

Publication number Publication date
PL232196B1 (pl) 2019-05-31
PL413023A1 (pl) 2017-01-16

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