EP0117820B1 - Segmentlenkbleche für einen Hochleistungs-Mantel-mit-Rohren-Wärmetauscher - Google Patents

Segmentlenkbleche für einen Hochleistungs-Mantel-mit-Rohren-Wärmetauscher Download PDF

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Publication number
EP0117820B1
EP0117820B1 EP84400377A EP84400377A EP0117820B1 EP 0117820 B1 EP0117820 B1 EP 0117820B1 EP 84400377 A EP84400377 A EP 84400377A EP 84400377 A EP84400377 A EP 84400377A EP 0117820 B1 EP0117820 B1 EP 0117820B1
Authority
EP
European Patent Office
Prior art keywords
baffles
shell
baffle
heat exchanger
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.)
Expired
Application number
EP84400377A
Other languages
English (en)
French (fr)
Other versions
EP0117820A1 (de
Inventor
David R. Geary
Katherine K. Flamm
Frank T. Morrison
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.)
Baltimore Aircoil Co Inc
Original Assignee
Baltimore Aircoil Co Inc
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 Baltimore Aircoil Co Inc filed Critical Baltimore Aircoil Co Inc
Priority to AT84400377T priority Critical patent/ATE30769T1/de
Publication of EP0117820A1 publication Critical patent/EP0117820A1/de
Application granted granted Critical
Publication of EP0117820B1 publication Critical patent/EP0117820B1/de
Expired legal-status Critical Current

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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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates

Definitions

  • the invention relates to a high performance shell and tube heat exchanger for obtaining high overall heat transfer coefficients at low pressure drops and low flow rates in said shell and tube heat exchangers.
  • the invention relates to a shell and tube heat exchanger comprising :
  • Such shell and tube heat exchangers are already known, as disclosed in DE-A-2 410 292.
  • the segmental baffles of the exchanger described in DE-A-2 410 292 have a segmented baffle angle of 60° or 120°, and are oriented so as to form a twist angle of 60° or 120° respectively ; furthermore, smooth tubes are used.
  • fluted or corrugated tubes in a shell and tube heat exchanger are generally known for increasing the heat transfer area, as described in US-A-3 696 863.
  • the heat exchanger illustrated at figure 8 of this patent also comprises segmented baffles oriented so as to form a twist angle of 180° creating an undulating flow path (reference 42).
  • the baffles are located a distance apart of at least 0.7 times the diameter of the baffle but not greater than 6 times the diameter of the baffle. With such a space between adjacent baffles, a natural spiral and wave-like pattern of fluid flowing through the shell and tube heat exchanger is easy to form.
  • Figure 1 shows a cutaway view of a typical shell and tube heat exchanger with the segmented baffles therein
  • Figure 2 shows the same cutaway view of the baffles and shell without the individual tubes of the shell and tube heat exchanger.
  • FIG. 1 a central portion 1 of a typical shell and tube heat exchanger is shown.
  • Typical flanges for enclosing the shell ends, inlet and outlet piping portions and tube sheets or tube end walls are not shown in the diagram but would be well known to those skilled in the art.
  • This heat exchanger consists of a housing or shell portion 2 shown in cutaway views having therein a plurality of fluted tubes 3. These tubes can be arranged within the heat exchanger in a typical spaced pattern, and the number and size of the tubes Will vary depending on the type of heat exchanger one is using.
  • the fluid or material to be cooled is typically, though not necessarily always, within the shell 2 of the heat exchanger 1 flowing in one direction whereas the heat exchange fluid inside of the tubes 3 flows in the opposite direction.
  • the tubes 3 are continuously fluted 9, along substantially the complete tube length, except for each tube end 8, where the tube surface is smooth to permit a proper seal or tube end attachment to a separating tube end wall at the ends of tubes which encloses and seals the outside of all tube ends from the outer shell region 10.
  • baffles 4 Located within the shell and tube heat exchanger 1 are a plurality of segmented-circular baffles 4, 5, 6, and 7. These baffles are in the form of a circular segment having an arc of 180° (segmented baffle angle). These baffles are provided in the heat exchanger 1 such that adjacent baffles are oriented at an angle of 90° (twist angle) as illustrated in the figures.
  • the baffles are constructed with holes such that they fit snugly over the plurality of tubes 3 provided within the heat exchanger and would prevent the flow of fluid outside the tubes where the baffle is located since the baffle forms a wall against fluid flowing in the direction of the baffle, thereby causing a rotating flow direction or a combination rotating flow with undulating flow pattern.
  • the plurality of baffles 4 through 7 are oriented at an angle of 90° from each other in such a way so that fluid flowing within the shell 2 forms a helical spiral configuration (shown as B 15) as it flows along.
  • a portion of the fluid also flows in a wavelike undulating pattern (shown as 16), and it is the combination of the wawelike undulating pattern along with the spiral helical flow pattern that brings about the higher heat transfer efficiency of this type of shell and tube heat exchanger.
  • the baffles can be constructed of any material such as for example metal or other material which preferably is noncorrosive to the fluid flowing therethrough.
  • segmented baffle angle of the baffles is shown in figure 2 as 180°, one skilled in the art would realize that any segmented baffle angle slightly more or less than 180° would be satisfactory, with a variation of some degrees from the precise value of 180°.
  • the baffles are spaced apart in the shell and tube heat exchanger at such a distance as to provide a natural spiral helical and wave-like flow path of any fluid therethrough.
  • the baffles must be located a distance apart at least 0.7 times the diameter of the baffle or shell but not greater than 6.0 times the diameter of the shell and cannot be at such a close or extremely far distance so that any spiral and wave-like pattern of fluid flowing therethrough would be difficult to form.
  • baffles have an outside diametric clearance to fit within the shell with ease.
  • the baffles are not physically attached to the inside wall of the shell, but rather held in position axially by rods (not shown) which parallel the tubes. Therefore, it is.conceivable that the baffles can vibrate within the shell due to the clearance tolerances.
  • segmental baffles at 180° twist positions as shown at figure 8 of US-A-3 696 863 hereabove cited, could vibrate over a greater distance in the direction perpendicular to the straight cut segment side, than in any other direction.
  • each second baffle at about 90° will also prevent vibration in the assembly by means of alternate supporting baffle orientation of the straight edge.
  • the above description refers to an illustration of the invention and is not intended to be limitative thereof.
  • the invention includes consideration for any generic type of segmental baffle, such as single, double, triple, or any multiple-segmental baffle component.

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)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Claims (2)

1. Mantel- und Rohrwärmeaustauscher, der aufweist :
a) einen äußeren Mantel (2),
b) eine Mehrzahl von Rohren (3) in dem Mantel, und
c) eine Reihe von kreisförmigen Segmentlenkblechen (4, 5, 6, 7), die eine Teilsperre für den Flüssigkeitsstrom bilden und die jeweils sie durchsetzende Öffnungen zum Blockieren des Fluidstromes um die Rohre haben, die durch die Öffnungen gehen, bei dem die Lenkbleche axial längs der Rohre in dem äußeren Mantel im Abstand angeordnet und derart ausgerichtet sind, daß sich ein Drallwinkel zwischen dem Durchmesser oder der Profilsehne eines Lenkbleches und dem Durchmesser oder der Profillinie eines benachbarten Lenkbleches der Gruppe von Lenkblechen bildet, und bei dem der zwischen benachbarten Lenkblechen auftretende Drallwinkel in dieselbe Winkeldrehung weist, dadurch gekennzeichnet, daß die Rohre (3) durchgehend im wesentlichen über die gesamte Rohrlänge hinweg geriffelt sind, daß jedes Lenkblech (4, 5, 6, 7) einen Segmentlenkblechwinkel von etwa 180° hat und daß der Drallwinkel zwischen benachbarten Lenkblechen etwa 90° ist.
2. Mantel- und Rohrwärmeaustauscher nach Anspruch 1, dadurch gekennzeichnet, daß die Lenkbleche (4, 5, 6, 7) in einem Abstand von wenigstens dem 0,7-fachen des Durchmessers des Lenkblechs angeordnet sind, der aber nicht größer als das 6-fache des Durchmessers des Lenkblechs ist.
EP84400377A 1983-02-28 1984-02-24 Segmentlenkbleche für einen Hochleistungs-Mantel-mit-Rohren-Wärmetauscher Expired EP0117820B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400377T ATE30769T1 (de) 1983-02-28 1984-02-24 Segmentlenkbleche fuer einen hochleistungs-mantel- mit-rohren-waermetauscher.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47080583A 1983-02-28 1983-02-28
US470805 1983-02-28

Publications (2)

Publication Number Publication Date
EP0117820A1 EP0117820A1 (de) 1984-09-05
EP0117820B1 true EP0117820B1 (de) 1987-11-11

Family

ID=23869115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400377A Expired EP0117820B1 (de) 1983-02-28 1984-02-24 Segmentlenkbleche für einen Hochleistungs-Mantel-mit-Rohren-Wärmetauscher

Country Status (13)

Country Link
EP (1) EP0117820B1 (de)
JP (1) JPS59164895A (de)
AT (1) ATE30769T1 (de)
AU (1) AU562526B2 (de)
BR (1) BR8304340A (de)
CA (1) CA1218357A (de)
DE (1) DE3467399D1 (de)
DK (1) DK157707C (de)
GR (1) GR79819B (de)
IE (1) IE55000B1 (de)
MX (1) MX158862A (de)
NZ (1) NZ207208A (de)
ZA (1) ZA841421B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE456274B (sv) * 1984-02-03 1988-09-19 Carl Gustaf Mellsjo Anordning vid vermevexlare for att ge det ena mediet en skruvformig cirkulationsrorelse
JP3017039B2 (ja) * 1995-03-07 2000-03-06 日本碍子株式会社 熱交換器
CN100386586C (zh) * 2006-03-20 2008-05-07 西安交通大学 一种多壳程螺旋折流板管壳式换热器
CN101042289A (zh) * 2007-04-26 2007-09-26 宋小平 防短路螺旋折流板管壳式换热器拉杆的设置方式
ES2394406B1 (es) * 2009-11-18 2013-10-23 Valeo Térmico, S.A. Intercambiador de calor para gases, en especial de los gases de escape de un motor.
JP2012172907A (ja) * 2011-02-22 2012-09-10 Cku:Kk フィンを螺旋階段状に配置したシェルアンドチューブ式の熱交換器
CN108469191B (zh) * 2018-05-25 2024-04-16 南京科技职业学院 一种螺旋板换热器
CN109186312B (zh) * 2018-10-23 2023-09-26 辽宁科技大学 一种可除垢折流板散热装置
KR20210012573A (ko) * 2019-07-25 2021-02-03 엘지전자 주식회사 열교환기
DE102019126535A1 (de) 2019-10-01 2021-04-01 Bitzer Kühlmaschinenbau Gmbh Wärmeübertrager, Kälte- oder Wärmeanlage mit einem solchen Wärmeübertrager

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR65106E (fr) * 1953-12-31 1956-01-26 Chausson Usines Sa échangeur thermique en particulier pour aéronefs et applications analogues
CH442380A (de) * 1966-05-31 1967-08-31 Bbc Brown Boveri & Cie Einrichtung zur Abdichtung eines Röhrenwärmetauschers
FR2036806A7 (en) * 1969-04-03 1970-12-31 Ara Barrenechea Constanc Heat-exchanger
US3696863A (en) * 1970-01-02 1972-10-10 Itt Inner-outer finned heat transfer tubes
US3630276A (en) * 1970-02-10 1971-12-28 Nasa Shell-side liquid metal boiler
DE2410292A1 (de) * 1974-03-04 1975-09-18 Cass International Gmbh Waermeaustauscher
US4183401A (en) * 1977-09-28 1980-01-15 Carrier Corporation Combination tube sheet and baffle
JPS5577481A (en) * 1978-11-30 1980-06-11 Matsushita Electric Works Ltd Motor driver

Also Published As

Publication number Publication date
ZA841421B (en) 1985-10-30
JPS59164895A (ja) 1984-09-18
DK157707C (da) 1990-06-25
DE3467399D1 (en) 1987-12-17
IE840449L (en) 1984-08-28
GR79819B (de) 1984-10-31
MX158862A (es) 1989-03-20
DK105184D0 (da) 1984-02-27
EP0117820A1 (de) 1984-09-05
DK157707B (da) 1990-02-05
BR8304340A (pt) 1984-11-06
IE55000B1 (en) 1990-04-11
CA1218357A (en) 1987-02-24
DK105184A (da) 1984-08-29
NZ207208A (en) 1987-02-20
AU562526B2 (en) 1987-06-11
AU2507584A (en) 1984-09-06
ATE30769T1 (de) 1987-11-15

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