EP1378719A1 - Tube avec élément tourbillonnaire - Google Patents

Tube avec élément tourbillonnaire Download PDF

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Publication number
EP1378719A1
EP1378719A1 EP02014876A EP02014876A EP1378719A1 EP 1378719 A1 EP1378719 A1 EP 1378719A1 EP 02014876 A EP02014876 A EP 02014876A EP 02014876 A EP02014876 A EP 02014876A EP 1378719 A1 EP1378719 A1 EP 1378719A1
Authority
EP
European Patent Office
Prior art keywords
pipe
flow
swirl body
tube
inner peripheral
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Withdrawn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
EP02014876A
Other languages
German (de)
English (en)
Inventor
Dietrich Dipl.Ing c/o Maschinenfabrik Schröder
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.)
Maschinenfabrik Georg Kiefer GmbH
Original Assignee
Maschinenfabrik Georg Kiefer GmbH
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 Maschinenfabrik Georg Kiefer GmbH filed Critical Maschinenfabrik Georg Kiefer GmbH
Priority to EP02014876A priority Critical patent/EP1378719A1/fr
Publication of EP1378719A1 publication Critical patent/EP1378719A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element

Definitions

  • the present invention relates to a tube with a swirl body, in particular a Pipe for guiding a heat transfer medium.
  • the invention further relates to a system for cooling a room or several rooms with pipes for Management of a cooling medium and a method for cooling a room or several rooms with a cooling medium, which in pipes through a concrete ceiling to be led.
  • the flow i.e. H. the individual flow layers of a fluid like air is in the Area of the surface braked by the adhering flow boundary layer.
  • the flow in the center of a tube is only through the adjacent one Layers of air braked. These layers of air exert little resistance, so that the air flows faster in the center of the tube than in an area between the ribs.
  • a heat transfer tube is known from the published patent application DE 100 38 624, that to form a large heat transfer surface on the inside of the pipe Ribs.
  • the ribs twist in the same Direction of rotation and with the same swirl length.
  • the free ends of the ribs to the longitudinal axis of the tube have a distance. This distance should be in a range of 1: 2 to 1: 3, which is optimal for the teaching of this published application dimensioned free space in the center of the tube.
  • Mixing between the flow layers in the center of the pipes and at the inner peripheral surfaces of the pipes can be improved.
  • the heat transfer between a heat-carrying medium and the Pipe and heat transfer can be improved.
  • the swirl body in the tube is preferably in an area in the center of the tube or at least close to this center arranged, i.e. in an area along the longitudinal axis or near the Longitudinal axis of the pipe.
  • the flow of the medium flowing through leads in essentially no longer through the center of the tube, but along the inner edge areas and preferably mainly along the inner Circumferential surface of the tube and therefore forms the appropriate training A ring-like flow around the swirl body e.g. essentially along the longitudinal axis of the tube.
  • the flow is through the swirl body advantageous in addition to an exchange between the different layers caused by the current.
  • An exchange between Flow layers of a laminar flow as well as a swirling of the Flow layers arise.
  • the swirl body has a preferred effect at least partially a cross flow in the area between the swirl body and the inner peripheral surface of the tube without the speed of the flow delayed significantly by the pipe.
  • each influencing the flow of a medium or disabling element e.g. massive or partly for the medium permeable can be used.
  • the element can e.g. with constant permanent, changing and / or rotating along the pipe Cross section be formed.
  • the swirl body Due to the swirl body in the area of the center of the tube, the Increased surface area in the pipe with which the flow comes into contact, so that the Heat transfer area inside the tube is increased.
  • the swirl body becomes thermally conductive with the inner peripheral surface of the tube connected so that the heat transferred to the swirl body to the outside from the Pipe can be derived.
  • the swirl body can be separated from the inner circumferential surface of the tube can be worn.
  • Such connectors could be formed, for example, by bars or grid-like plates.
  • these connecting parts the swirl body is held in position in the tube.
  • these connecting parts can be the heat-conducting connection between the twist and the inner peripheral surface of the tube when they are out good heat-conducting material.
  • aluminum is used for this or a suitable plastic.
  • the tube and the swirl body itself are preferably also made from such a material. It is also possible the tube with optional internal ribs on the swirl body shrink.
  • the Swirl bodies also have a star-shaped profile in cross section.
  • the star-shaped Profile can have three or more stars.
  • the swirl body extends in the essentially over the entire length of the tube.
  • the swirl body is at least extends across the length of the ceiling or wall.
  • the swirl body can be in axial Direction can be arranged side by side and can also in the radial direction arranged side by side. Through the gaps between the swirl bodies a flow can also take place. These gaps can therefore also to a good mixing of the different layers of the flow contribute.
  • in addition to spaced at least one from the inner peripheral surface of the tube arranged swirl body at least one on the inner peripheral surface of the tube arranged element intended to influence the flow.
  • fins are formed on the inner circumferential surface of the tube together form a system influencing the flow.
  • Ribs can run essentially in the longitudinal direction of the tube or else be provided twisted along the inner peripheral surface.
  • Another one Element also increases the heat transfer area inside the tube and further improves the exchange of flow layers through the pipe running flow. It is advantageous to determine the length and distance of the Ribs of the second element and the profile of the centrally arranged swirl body to coordinate with each other for an improved flow.
  • a tube with a diameter of 60 or 80 mm can as a swirl body a rectangular profile with a thickness of 2 to 3 mm and ribs matched to their shape and arrangement can be used.
  • the ribs on the inner circumferential surface of the tube can also be used as Serve bracket for the central swirl body.
  • the ribs can also do this be of different lengths, so that the swirl body e.g. only from the longer ribs is worn. It is advantageous between the swirl body and the ribs to establish a good heat-conducting connection. This allows the heat transferred from the heat transfer medium from the swirl body and the ribs are led out of the pipe.
  • a tube according to the invention with one of the inner Circumferential surface of the tube spaced swirl body is preferably the tube shrunk onto the swirl body.
  • the swirl body can previously with the Be provided connecting parts or there are already on the inner peripheral surface of the tube arranged ribs, the one when shrinking with the swirl body Establish connection.
  • the system according to the invention for cooling a room or several rooms has tubes which are connected to at least one of an inner peripheral surface of the Pipe spaced swirl body are provided, as described above.
  • the tubes according to the invention are preferred in essentially in an exposed ceiling, e.g. at the core of a concrete ceiling through which cooling air as a heat transfer medium is led.
  • ribs can also be provided on the outside of the tubes, around which Increase heat transfer to the concrete ceiling or outside air further.
  • a heat-conducting medium within a tube by at least one Swirl bodies are mixed and the air flows at least partially or completely between the swirl body and an inner peripheral surface of the tube.
  • a tube with at least one is preferably used for the method Swirl body used to mix the flow layers as above has been described.
  • the invention has been described by way of example for a cooling process. Likewise can the invention can also be used in a heating process in which e.g. Heat from a flowing medium to the pipe and e.g. to a floor or a ceiling or wall is given.
  • Figure 1 is a Cross section through an inventive tube with on the inner peripheral surface of the tube arranged ribs and one of the inner peripheral surface of the Tube spaced swirl body shown.
  • the pipe could but also a different cross section such as a rectangular or have an oval cross-section.
  • a star-shaped swirl body with eight star tips arranged.
  • the swirl body could also be slightly outside the center or near the center of the tube.
  • the swirl body is from the inner peripheral surface 3 of the tube spaced apart. On the inner peripheral surface 3 there are a plurality of ribs 4 provided, which are oriented towards the center Z.
  • the ribs 4 also serve as Connecting parts between the swirl body 2 and the inner peripheral surface 3 of the Rohres 1.
  • the swirl body is therefore carried by the ribs 4.
  • the length of the star tips can vary in the direction of the longitudinal axis of the tube, so that there is no closed space through the connection points between the longer areas of the star tips and the ribs.
  • the areas of the star arms shown in the drawing along the Longitudinal axis of the tube are formed and / or the ribs 4 along the tube 1 rotated about the longitudinal axis, so that the swirl body 2 is helical is.
  • a Star arm surface with different ribs one after the other connecting points e.g. a Star arm surface with different ribs one after the other connecting points.
  • the heat transfer surface is inside the tube 1 by the free peripheral surface of the inner peripheral surface 3 of the tube, the Outer surface of the ribs 4 and the outer surface of the swirl body 2 are formed.
  • the swirl body 2 as can be seen from the drawing, the flow of a Medium along the heat transfer surfaces improved and thus the Heat exchange on the heat transfer surfaces increased considerably.
  • the medium preferably flows mainly between the swirl body and one inner circumferential surface of the tube.
  • a cross flow is advantageously generated, which for an exchange of the flow layers in the vicinity of the swirl body and the flow layers near the circumferential surface of the tube.
  • the Flow velocity is not adversely affected by the swirl body affected. This can improve the heat exchange so that a with Cooling system equipped with such pipes has an increased cooling capacity and a cooling process using such pipes works more efficiently.

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)
EP02014876A 2002-07-04 2002-07-04 Tube avec élément tourbillonnaire Withdrawn EP1378719A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02014876A EP1378719A1 (fr) 2002-07-04 2002-07-04 Tube avec élément tourbillonnaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02014876A EP1378719A1 (fr) 2002-07-04 2002-07-04 Tube avec élément tourbillonnaire

Publications (1)

Publication Number Publication Date
EP1378719A1 true EP1378719A1 (fr) 2004-01-07

Family

ID=29719722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02014876A Withdrawn EP1378719A1 (fr) 2002-07-04 2002-07-04 Tube avec élément tourbillonnaire

Country Status (1)

Country Link
EP (1) EP1378719A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT504249A3 (de) * 2006-09-27 2012-10-15 Techeffekt Anstalt Helix-kanal für eine erzwungene strömung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1282811A (fr) * 1961-02-03 1962-01-27 Sepi Perfectionnements aux échangeurs de chaleur
FR1564740A (fr) * 1968-02-26 1969-04-25
DE2305791A1 (de) * 1972-02-10 1973-08-16 Raufoss Ammunisjonsfabrikker Waermeaustauscher-rohr
US4296539A (en) * 1978-01-27 1981-10-27 Kobe Steel, Limited Heat transfer tubing for natural gas evaporator
DE19609641A1 (de) 1996-03-12 1997-09-18 Kiefer Gmbh Maschf G G Verfahren und System zum Kühlen eines Raumes
DE10038624A1 (de) 2000-08-03 2002-02-21 Broekelmann Aluminium F W Wärmeübertragungsrohr mit gedrallten Innenrippen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1282811A (fr) * 1961-02-03 1962-01-27 Sepi Perfectionnements aux échangeurs de chaleur
FR1564740A (fr) * 1968-02-26 1969-04-25
DE2305791A1 (de) * 1972-02-10 1973-08-16 Raufoss Ammunisjonsfabrikker Waermeaustauscher-rohr
US4296539A (en) * 1978-01-27 1981-10-27 Kobe Steel, Limited Heat transfer tubing for natural gas evaporator
DE19609641A1 (de) 1996-03-12 1997-09-18 Kiefer Gmbh Maschf G G Verfahren und System zum Kühlen eines Raumes
DE10038624A1 (de) 2000-08-03 2002-02-21 Broekelmann Aluminium F W Wärmeübertragungsrohr mit gedrallten Innenrippen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT504249A3 (de) * 2006-09-27 2012-10-15 Techeffekt Anstalt Helix-kanal für eine erzwungene strömung
AT504249B1 (de) * 2006-09-27 2013-01-15 Techeffekt Anstalt Helix-kanal für eine erzwungene strömung

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