EP0741273B1 - A plate-type heat exchanger - Google Patents

A plate-type heat exchanger Download PDF

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Publication number
EP0741273B1
EP0741273B1 EP96105996A EP96105996A EP0741273B1 EP 0741273 B1 EP0741273 B1 EP 0741273B1 EP 96105996 A EP96105996 A EP 96105996A EP 96105996 A EP96105996 A EP 96105996A EP 0741273 B1 EP0741273 B1 EP 0741273B1
Authority
EP
European Patent Office
Prior art keywords
plates
fins
plate
canals
another
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.)
Expired - Lifetime
Application number
EP96105996A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0741273A2 (en
EP0741273A3 (en
Inventor
Giancarlo c/o Enel S.p.A. Benelli
Massimiliano c/o Enel S.p.A. De Carli
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.)
Enel SpA
Original Assignee
Enel 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 Enel SpA filed Critical Enel SpA
Publication of EP0741273A2 publication Critical patent/EP0741273A2/en
Publication of EP0741273A3 publication Critical patent/EP0741273A3/en
Application granted granted Critical
Publication of EP0741273B1 publication Critical patent/EP0741273B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0241—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the tubes being flexible
    • 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
    • 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
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements

Definitions

  • the invention concerns a plate-type heat exchanger.
  • Heat exchangers for fluids comprise an exchange surface that has the task of separating two fluids at different temperatures and to allow the passage of heat from the warmer fluid to the colder one.
  • said exchange surface must be non permeable and ensures an adequate mechanical and corrosion resistance.
  • the state of the art includes exchange surfaces in the form' of plane or undulated plates and in the form of plates and pipes sometimes finned to improve the heat exchange function.
  • a heat exchanger comprises batches of plates between which canals are defined, it is necessary to contrast the forces deriving from the presence of fluids under pressure within these canals by means of one or the other of these two solutions: the plates that define a canal under pressure may be linked together by welding round their perimeter and inside the canals; the plates may be bonded externally to the batch in various ways, for example by means of braced containment plates. With the first solution the plates become inseparable, while with the second the disassembly of single plates is possible.
  • the heat exchanger invented comprises a number of plates parallel to one another within a casing so as to define a group of first canals for the passage of a first fluid under pressure and a group of second canals for the passage of a second fluid, the two groups of canals being perpendicular to each other, and is characterized in that the number of plates are arranged in a number of couples, each couple being defined by two plates spaced and held together by ribs therebetween and being spaced by two fins having a wave shaped section perpendicular to the direction of the first canals, each fin being welded to one plate of the couples and the two fins facing each other being in contact with one another or being slightly distant from one another or in conctact with one another with their peaks, the space between the plates of a couple defining said first canal and the space within two couples defining said second canal.
  • the peaks of the fins that extend into the same second canal barely touch or are slightly distanced.
  • the heat exchanger includes within its casing a "batch" made up of single couples of plates with internal ribbing and two fins borne externally, each couple of plates being mechanically independent from the adjacent ones and, hence, free to be removed from the casing.
  • the width of the first and second canals may be freely chosen in order to achieve an optimum speed for each fluid; it is also understood that the shape of the fin wave is preferably in the form of an "aligreek" and that the offset between the two facing fins will preferably correspond to the p/2 half-pitch, but that said shape may also be different and the offset may also differ from the p/2 half-pitch.
  • Fig. 1 shows finned plates 1 that define three canals 3 for water under pressure and two canals 5 for gas or liquid fuels combustion smokes, perpendicular to one another;on one side of one of the two plates 1 that define a canal 3 there are ribbings 2 that define the three canals 3 vertically for the water under pressure and, on the other side, fins 4 are welded that, associated with equal fins 4 welded to an opposite plate, define the two horizontal canals 5 for the smoke; in this case the canals 3 for water under pressure have a very small thickness, defined by the vertical ribbings 2 that, being solid with the opposite plates 1, ensure that the couple of plates resist the water pressure.
  • the fins 4 on the gas-side ensure that the plates do not deform between the ribs 2 on the water-side.
  • Each fin 4 gas-side is brazing-welded on a single plate 1, so as to ensure the possibility of slipping out from the batch of plates each single water canal 3 with the relative fins 4 on the two sides.
  • the contact between opposite fins 4 facing onto the same canal for gas under pressure is not necessary. Rather, it might be an obstacle to extracting the elements making up the single canals for water under pressure 3 if it wasn't possible to slightly "open" the batch of plates.
  • the shape of the fins 4 is of little importance.
  • the rectangular or "aligreek" shape illustrated is the simplest one that might minimize the production costs of gas canals 5.
  • Fig. 2 highlights the brazing-welds 6 required for the production of the exchanger plates.
  • the welds bear on:
  • fins opposite one another that is facing one towards the other in a canal 5 are offset by p /2.
  • the offset of opposite fins 4 is useful with the rectangular geometry illustrated, but may be superfluous with other geometries, for example if the peaks of the fins were markedly concave or convex, rather than flat.
  • Fig. 3 shows a small size plate-type heat exchanger 1 complete with casing 7, the thermo-insulating pad of material 8 that covers the batch of plates 9, the pipes 11 for the intake of water under pressure, pipes 12 for the outlet of water under pressure and flange 13 for connecting to the plant.
  • Each of the pipes 11, 12 has a cap 14 at one end.
  • the canals 3 for water under pressure and smoke canals 5 are outlined.
  • Fig. 4 shows a sketch of one method for realizing the hydraulic connection between a pipe 11 for the intake of water under pressure and each, single, canal 3 between two plates 1; on the external side of each plate 1 the fins 4 are visible; the pipe 11 bears a loop-hole 15 corresponding to each opening 16 between said two plates 1; from loop-hole 15 and through opening 16 the water under pressure flows into canal 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Fuel Cell (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP96105996A 1995-05-03 1996-04-17 A plate-type heat exchanger Expired - Lifetime EP0741273B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95MI000882A IT1279041B1 (it) 1995-05-03 1995-05-03 Scambiatore di calore a piastre
ITMI950882 1995-05-03

Publications (3)

Publication Number Publication Date
EP0741273A2 EP0741273A2 (en) 1996-11-06
EP0741273A3 EP0741273A3 (en) 1997-10-01
EP0741273B1 true EP0741273B1 (en) 2002-11-20

Family

ID=11371514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96105996A Expired - Lifetime EP0741273B1 (en) 1995-05-03 1996-04-17 A plate-type heat exchanger

Country Status (6)

Country Link
EP (1) EP0741273B1 (cs)
AT (1) ATE228232T1 (cs)
CA (1) CA2175538A1 (cs)
CZ (1) CZ127796A3 (cs)
DE (1) DE69624864D1 (cs)
IT (1) IT1279041B1 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102338578B (zh) * 2011-08-17 2013-04-17 合肥通用机械研究院 封闭式双通道板翅式散热器
TWM460251U (zh) * 2012-11-14 2013-08-21 Norm Pacific Automat Corp 除濕輪式除濕機及其熱交換器
CN111750711B (zh) * 2020-06-17 2022-06-28 新乡航空工业(集团)有限公司 一种航空用基于场协同的板翅式换热器翅片流道布置结构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB528623A (en) * 1939-01-31 1940-11-04 Arthur Bland Tillotson Improvements in plate heat exchangers suitable for heating air
AT239197B (de) * 1963-09-19 1965-03-25 Friedrich Dr Ing Hermann Zweistufiger Kopfkondensator für Destillierkolonnen
GB1304692A (cs) * 1969-01-21 1973-01-24
US3731738A (en) * 1971-07-26 1973-05-08 H Cooper Tube fins of outwardly-organized materials
FR2312752A1 (fr) * 1975-05-27 1976-12-24 Delas Condenseurs Elements d'echangeurs compacts pour refroidissement par l'air atmospherique des divers circuits recevant la chaleur degradee d'une installation industrielle
FR2688582B1 (fr) * 1992-03-12 1994-12-09 Delta Plus Echangeur de chaleur a courants croises.

Also Published As

Publication number Publication date
CA2175538A1 (en) 1996-11-04
EP0741273A2 (en) 1996-11-06
ATE228232T1 (de) 2002-12-15
ITMI950882A1 (it) 1996-11-03
DE69624864D1 (de) 2003-01-02
EP0741273A3 (en) 1997-10-01
IT1279041B1 (it) 1997-12-04
CZ127796A3 (en) 1996-11-13
ITMI950882A0 (it) 1995-05-03

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