EP0009069A1 - Echangeur de chaleur en forme de tube et son application aux fins de refroidissement de l'eau réfrigérant une centrale électrique - Google Patents

Echangeur de chaleur en forme de tube et son application aux fins de refroidissement de l'eau réfrigérant une centrale électrique Download PDF

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Publication number
EP0009069A1
EP0009069A1 EP79101447A EP79101447A EP0009069A1 EP 0009069 A1 EP0009069 A1 EP 0009069A1 EP 79101447 A EP79101447 A EP 79101447A EP 79101447 A EP79101447 A EP 79101447A EP 0009069 A1 EP0009069 A1 EP 0009069A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
tube
heat
wall
exchanger according
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.)
Withdrawn
Application number
EP79101447A
Other languages
German (de)
English (en)
Inventor
Peter Dr.Rer.Nat. Rohner
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.)
KM Kabelmetal AG
Original Assignee
KM Kabelmetal AG
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 KM Kabelmetal AG filed Critical KM Kabelmetal AG
Publication of EP0009069A1 publication Critical patent/EP0009069A1/fr
Withdrawn legal-status Critical Current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
    • F28D15/0233—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 conduits having a particular shape, e.g. non-circular cross-section, annular

Definitions

  • the invention relates to a heat exchanger in the form of a tube.
  • heat exchanger tubes are often used, in which one medium flows inside the tube and the other medium flows against the tube from the outside.
  • special precautions are taken on the pipes to take into account the different heat transfer coefficients when transferring heat from a flowing liquid medium to a solid medium compared to the transition from a gaseous to a solid medium wear. For this reason z. B. often increases the surface on the gas side by ribbing. However, this does not always lead to technically satisfactory solutions.
  • the present invention has for its object to provide a heat exchanger tube which is particularly simple It is suitable to carry out a heat exchange between flowing media, especially if the media are liquid and gaseous.
  • At least one helically wound, corrugated heat pipe is attached to the inner wall in good heat-conducting contact with the inner wall.
  • the main advantage of the invention is to be seen in the fact that the exchange surface on the gas side is drastically increased by the arrangement of the helical corrugated heat pipe. Due to the corrugation of the heat pipe, a good swirling of the gas flow is achieved, which improves the heat transfer even more. In addition, the arrangement according to the invention is less prone to contamination on the gas side than narrow ribbing. Compared to other heat exchangers that use the heat pipe principle, there is also the advantage that the spiral consisting of many coils from a corrugated pipe passes through heating and cooling zones several times and thus acts like a large number of heat pipes, even though only a single corrugated pipe of great length has been assembled into a heat pipe .
  • a particularly favorable heat transfer occurs when the individual turns of the heat pipe are connected by a beam-shaped element which is in good heat-conducting contact with the windings and the beam-shaped element is fastened to the inner wall in likewise good heat-conducting contact.
  • the tube has the cross section of an area-covering polygon, preferably an equilateral hexagon.
  • the helix can have any cross section. However, it should be chosen so that the flow channels that are formed have the same cross-section as possible. A helix is expediently attached to each straight inner wall.
  • the coils will be arranged interlocking or side by side, in which case the individual turns are wound at a distance or close to one another.
  • the return transport of the condensate from the cooling zone to the heating zone is expediently carried out due to the force of gravity, the return transport of the liquid working fluid possibly being further improved by capillary forces.
  • the turns of the coils are arranged inclined to the longitudinal axis when the heat exchanger is arranged vertically.
  • the shape of the spirals is irrelevant, i. H. circular cross-sections are possible, but also any other shape.
  • the wall of the heat exchanger tube is provided with indentations, the heat transfer is further intensified, since both the medium flowing outside and the medium flowing inside the tube are additionally swirled.
  • the heat exchanger can be used in a particularly favorable manner for cooling the cooling water of a power plant, several heat exchanger tubes arranged in parallel and at a distance from one another being used. The water to be cooled flows through the space that is created between the heat exchanger tubes that form a heat exchanger field, while air flows through the interior of the heat exchanger tubes.
  • the hexagon cross-section has proven to be particularly advantageous since the cooling water flowing in from the side is deflected several times and swirled in the process.
  • a heat exchanger field can be produced in a particularly advantageous manner by arranging the individual heat exchanger tubes parallel to one another and sealing the tube interspaces at the end regions with a suitable grid.
  • a plurality of helically wound heat pipes 2 are attached to the inner wall of a metal tube 1 with a cross-section, preferably made of aluminum or copper.
  • the individual turns of the heat pipe 2 are held at a distance from one another via recesses, not shown, in a bar-shaped element 3, preferably made of copper.
  • the bar-shaped element 3 is in good heat-conducting contact both with the individual turns of the heat pipe 2 and with the inner wall of the metal pipe 1, for example via a solder connection.
  • the heat pipe 2 is wound in the form of a helix which has a triangular cross section.
  • the beam-shaped element 3 is soldered to the tube wall, which carries the individual turns of the heat pipe 2 on its side facing away from the tube wall 1.
  • the heat pipe is designed as a metallic corrugated tube, which was preferably produced by longitudinal seam welding and subsequent corrugation in a continuous working process.
  • the tube length required for a coil is first closed at one end, evacuated, filled with the working medium, for example water, frig, ammonia or other suitable substances in a precisely dimensioned manner, and closed at the end and then wound into the coil.
  • the work evaporates medium inside the heat pipe and is distributed evenly over the turns and condenses on the inside wall of the turns, provided the turns are cooled.
  • the turns of the heat pipe 2 are inclined at an angle ⁇ to the pipe wall, so that the condensate can flow back to the heating zone due to the force of gravity inside the heat pipe 2.
  • FIGS. 5 and 6 A particularly favorable application example of the heat exchanger tubes shown in FIGS. 1 to 4 is shown in FIGS. 5 and 6.
  • a large number of the heat exchanger tubes are combined to form a heat exchanger field, with 1 channels 4 remaining between the individual heat exchanger tubes through which the water to be cooled can flow.
  • the space between the individual heat exchanger rays 1 is sealed at the end with a suitable grid, not shown, as a result of which the flow cross section for the water to be cooled is limited at the top and bottom.
  • Side walls 5 and 6 form the lateral boundaries. In this case, air flows through the interior of the heat exchanger tubes 1.
  • the embodiments shown are also suitable for the heat from the gaseous, i.e.. H. to transfer medium flowing inside the heat exchanger to the liquid medium flowing outside.
  • the corrugated tube working as a heat pipe will be arranged so that gravity is used to transport the liquid working fluid back.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP79101447A 1978-08-07 1979-05-11 Echangeur de chaleur en forme de tube et son application aux fins de refroidissement de l'eau réfrigérant une centrale électrique Withdrawn EP0009069A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2834593 1978-08-07
DE19782834593 DE2834593A1 (de) 1978-08-07 1978-08-07 Waermetauscher in form eines rohres

Publications (1)

Publication Number Publication Date
EP0009069A1 true EP0009069A1 (fr) 1980-04-02

Family

ID=6046434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101447A Withdrawn EP0009069A1 (fr) 1978-08-07 1979-05-11 Echangeur de chaleur en forme de tube et son application aux fins de refroidissement de l'eau réfrigérant une centrale électrique

Country Status (5)

Country Link
US (1) US4240500A (fr)
EP (1) EP0009069A1 (fr)
JP (1) JPS5523894A (fr)
BR (1) BR7904986A (fr)
DE (1) DE2834593A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2494830A1 (fr) * 1980-11-21 1982-05-28 Applic Technologiques Element d'echange de chaleur forme de tubes en forme de serpentins en matiere plastique et recuperateur de chaleur le mettant en oeuvre

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460527A1 (fr) * 1979-06-29 1981-01-23 Commissariat Energie Atomique Dispositif d'homogeneisation dans le sens circonferentiel des temperatures de la virole d'un composant traversant la dalle superieure d'un reacteur nucleaire
US6173761B1 (en) * 1996-05-16 2001-01-16 Kabushiki Kaisha Toshiba Cryogenic heat pipe
US20050126749A1 (en) * 2002-05-14 2005-06-16 Matti Assil I. Heat pipe cooler for differential assembly

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1910378A1 (de) * 1968-03-04 1969-11-27 Polska Akademia Nauk Inst Masz Hochtemperaturrekuperator
DE1922446A1 (de) * 1969-05-02 1970-12-17 Bbc Brown Boveri & Cie Kuehleinrichtung insbesondere fuer elektronische Anlagen
FR2123459A1 (fr) * 1971-01-27 1972-09-08 Philips Nv
FR2135031A1 (en) * 1971-04-21 1972-12-15 Air Ind Sealed tube heat exchanger - modified to avoid entrainment of liquid transfer medium during vaporization
FR2158548A1 (fr) * 1971-11-06 1973-06-15 Philips Nv
GB1413675A (en) * 1971-09-17 1975-11-12 Beteiligungs Ag Haustechnik Apparatus for the absortion and emission of thermal radiation
US4036290A (en) * 1972-01-24 1977-07-19 Kelly Donald A Helical expansion condenser
DE2748339A1 (de) * 1977-10-28 1979-05-03 Kabel Metallwerke Ghh Vorrichtung zum transport von waermeenergie
GB2006950A (en) * 1977-10-28 1979-05-10 Kabel Metallwerke Ghh Device for transporting thermal energy

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR602744A (fr) * 1925-08-29 1926-03-25 Procédé pour le chauffage ou la réfrigération à distance
US2089540A (en) * 1933-09-26 1937-08-10 Dallenbach Walter Mercury vapor rectifier
JPS466687A (fr) * 1970-05-13 1971-12-13
DE2519803C2 (de) * 1975-05-03 1983-09-08 GEA Luftkühlergesellschaft Happel GmbH & Co KG, 4630 Bochum Vorrichtung zum Wärmeaustausch

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1910378A1 (de) * 1968-03-04 1969-11-27 Polska Akademia Nauk Inst Masz Hochtemperaturrekuperator
DE1922446A1 (de) * 1969-05-02 1970-12-17 Bbc Brown Boveri & Cie Kuehleinrichtung insbesondere fuer elektronische Anlagen
FR2123459A1 (fr) * 1971-01-27 1972-09-08 Philips Nv
FR2135031A1 (en) * 1971-04-21 1972-12-15 Air Ind Sealed tube heat exchanger - modified to avoid entrainment of liquid transfer medium during vaporization
GB1413675A (en) * 1971-09-17 1975-11-12 Beteiligungs Ag Haustechnik Apparatus for the absortion and emission of thermal radiation
FR2158548A1 (fr) * 1971-11-06 1973-06-15 Philips Nv
US4036290A (en) * 1972-01-24 1977-07-19 Kelly Donald A Helical expansion condenser
DE2748339A1 (de) * 1977-10-28 1979-05-03 Kabel Metallwerke Ghh Vorrichtung zum transport von waermeenergie
GB2006950A (en) * 1977-10-28 1979-05-10 Kabel Metallwerke Ghh Device for transporting thermal energy
FR2407445A1 (fr) * 1977-10-28 1979-05-25 Kabel Metallwerke Ghh Dispositif pour transporter de l'energie calorifique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2494830A1 (fr) * 1980-11-21 1982-05-28 Applic Technologiques Element d'echange de chaleur forme de tubes en forme de serpentins en matiere plastique et recuperateur de chaleur le mettant en oeuvre

Also Published As

Publication number Publication date
DE2834593A1 (de) 1980-02-28
BR7904986A (pt) 1980-04-22
JPS5523894A (en) 1980-02-20
US4240500A (en) 1980-12-23

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH FR GB IT NL SE

ITCL It: translation for ep claims filed

Representative=s name: BARZANO' E ZANARDO ROMA S.P.A.

17P Request for examination filed
ITF It: translation for a ep patent filed

Owner name: RITARATO STATO DI DOMANDA ALL'OEB;BARZANO' E ZANAR

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19811001

EUG Se: european patent has lapsed

Ref document number: 79101447.5

Effective date: 19831214

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ROHNER, PETER, DR.RER.NAT.