EP3001434B1 - Radiateur destiné au refroidissement d'un liquide de refroidissement d'un transformateur - Google Patents

Radiateur destiné au refroidissement d'un liquide de refroidissement d'un transformateur Download PDF

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Publication number
EP3001434B1
EP3001434B1 EP14186769.7A EP14186769A EP3001434B1 EP 3001434 B1 EP3001434 B1 EP 3001434B1 EP 14186769 A EP14186769 A EP 14186769A EP 3001434 B1 EP3001434 B1 EP 3001434B1
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EP
European Patent Office
Prior art keywords
cooling
radiator
transformer
cooling liquid
heat sink
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.)
Active
Application number
EP14186769.7A
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German (de)
English (en)
Other versions
EP3001434A1 (fr
Inventor
Uwe Janik
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.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP14186769.7A priority Critical patent/EP3001434B1/fr
Publication of EP3001434A1 publication Critical patent/EP3001434A1/fr
Application granted granted Critical
Publication of EP3001434B1 publication Critical patent/EP3001434B1/fr
Active legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/02—Flexible elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/12—Safety or protection arrangements; Arrangements for preventing malfunction for preventing overpressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/14—Safety or protection arrangements; Arrangements for preventing malfunction for preventing damage by freezing, e.g. for accommodating volume expansion

Definitions

  • the invention relates to a radiator for cooling a cooling liquid of a transformer with a plurality of cooling tubes running parallel to a longitudinal axis of the radiator for receiving cooling liquid.
  • Transformers are generally subject to aging and wear, especially if they are at increased risk of corrosion, for example when used on offshore platforms. Therefore, regular and event-related maintenance work is carried out on transformers.
  • Liquid-cooled transformers generally have expansion vessels which serve to hold coolant, usually transformer oil, in order to compensate for thermal expansion of the coolant.
  • To transport coolant between an expansion vessel and the transformer tank, such a transformer also has coolant lines. Both the expansion vessel and the coolant lines increase the surface area of a transformer exposed to environmental influences and thus its susceptibility to damage from these environmental influences and thereby also the need for maintenance and repair work.
  • an expansion vessel inherently causes contact between the cooling liquid and the surroundings, which can adversely affect the cooling liquid and components in contact with it in the long term.
  • DE 10010737 C2 discloses a radiator for an electrical transformer with two with a plurality of beads provided sheets, which are connected to each other in the beads, and form the cavities with a resulting volume, the two sheets in the beads being connected to one another in such a way that the volume of the cavities can be increased over a plurality of bulges.
  • a radiator for cooling a cooling liquid of a transformer which has cooling pipes running parallel to one another.
  • the cooling tubes are spaced apart from one another by an intermediate section and have an oval shape in cross section.
  • the radiator is made of steel.
  • a radiator is known whose cooling tubes are angular in cross section. Two such cooling tubes are connected to one another by beads, so that the volume of the cavities can be increased by bulges.
  • the invention has for its object to provide an improved radiator for cooling a cooling liquid of a transformer, which in particular reduces the need for maintenance and repair of the transformer.
  • a radiator according to the invention for cooling a cooling liquid of a transformer comprises at least one cooling body, which has a plurality of cooling tubes which run parallel to a longitudinal axis of the cooling body and are spaced apart from one another of coolant.
  • Each cooling tube has at least one cooling tube wall running along the longitudinal axis of the cooling body, which is designed to be elastically deformable in order to increase the volume enclosed by the cooling tube.
  • the cooling tubes are spaced apart from one another along an X direction and each run parallel to a longitudinal axis of the radiator running in a Z direction, so that two adjacent cooling tubes are separated from one another by a separating gap running in the Z direction.
  • the invention also provides that at least one elastically deformable cooling tube wall has two edge regions running along the longitudinal axis of the heat sink and an elastically deformable middle region connecting these two edge regions, the central region being essentially flat in the undeformed state and each edge region being to an outside of the Cooling pipe wall curved shaft is formed with a shaft crest running parallel to the longitudinal axis of the heat sink.
  • Such a radiator can compensate for thermal expansion of the cooling liquid by increasing the volume enclosed by the cooling tubes.
  • the radiator can thereby also take on the function of an expansion vessel to compensate for thermal expansion of the cooling liquid in addition to cooling the cooling liquid.
  • a transformer with a radiator of this type does not require an additional expansion vessel and therefore also no coolant lines between the expansion vessel and the transformer tank. This advantageously reduces the number of components of the transformer and the installation space required for this, as well as the maintenance and repair requirements for these components.
  • contact of the coolant with the environment, as occurs in principle when using an expansion vessel, and the resulting impairment of the coolant and components in contact therewith can advantageously be avoided.
  • the invention advantageously makes it possible to implement an elastically deformable cooling tube wall in a simple manner solely through the shape of the cooling tube wall.
  • At least one cooling tube has two cooling tube walls of this type which are located opposite one another.
  • the enlargement of the volume enclosed by the cooling tube by the elastic deformation of the cooling tube walls is advantageously increased compared to a cooling tube with only one elastically deformable cooling tube wall.
  • At least one cooling tube consists of two elastically deformable cooling tube walls of the type described, the edge regions of these cooling tube walls each in a flange region running parallel to the longitudinal axis of the cooling body and facing away from the central region of the respective cooling tube wall leak, which is connected to a corresponding flange area of the other cooling tube wall in a coolant-tight manner.
  • a cooling tube can be produced in a simple and efficient manner from two elastically deformable cooling tube walls by connecting these two cooling tube walls to one another in their flange regions.
  • each elastically deformable cooling tube wall is made from a steel sheet.
  • each heat sink has at least one coolant inlet region with an inlet opening for inlet of coolant into the heat sink, the coolant inlet region being connected to a first end of at least one cooling tube for guiding coolant from the coolant inlet region into the cooling tube.
  • each heat sink has at least one coolant outlet region with an outlet opening for discharging coolant from the heat sink, the coolant outlet region being connected to a second end of at least one cooling tube for guiding coolant from the cooling tube into the coolant outlet region.
  • the two aforementioned embodiments of the invention advantageously enable the supply or removal of cooling liquid to or from a cooling body and its cooling tubes via the cooling liquid inlet area or the cooling liquid outlet area of the cooling body.
  • radiator has a plurality of heat sinks arranged one behind the other.
  • the cooling capacity of the radiator can advantageously be increased and adapted to the respective transformer.
  • a transformer according to the invention comprises a transformer tank which can be at least partially filled with a cooling liquid, a radiator according to the invention for cooling the cooling liquid, at least a first connecting line for feeding cooling liquid from the transformer tank into the radiator and at least a second connecting line for feeding cooling liquid from the radiator in the transformer tank.
  • such a transformer can be realized without an expansion vessel to compensate for thermal expansion of the cooling liquid if the radiator is designed accordingly, since the radiator also takes on the function of the expansion tank in addition to cooling the cooling liquid, which has the above-mentioned advantages, particularly with regard to Reduced maintenance and repair needs for the transformer.
  • Embodiments of such a transformer provide that the transformer has a tap changer, which comprises at least one vacuum interrupter, and / or that the transformer tank has a common coolant space for a tap changer and an active part of the transformer, and / or that the transformer has a degassing device for removing Has gas from the transformer tank and / or a drying device for dehumidifying the cooling liquid.
  • a tap changer which comprises at least one vacuum interrupter
  • the transformer tank has a common coolant space for a tap changer and an active part of the transformer
  • the transformer has a degassing device for removing Has gas from the transformer tank and / or a drying device for dehumidifying the cooling liquid.
  • a transformer according to the invention enables this also the use of a biodegradable insulating liquid, e.g. B. a natural or synthetic ester, as a cooling liquid with an acceptable aging behavior.
  • a biodegradable insulating liquid e.g. B. a natural or synthetic ester
  • the Figures 1 to 5 show various representations of a heat sink 3 of a radiator 1 for cooling a cooling liquid in a Figure 7 schematically illustrated transformer 100, a coordinate system with Cartesian coordinates X, Y, Z also being shown for better understanding is.
  • Show Figure 1 a front view of the heat sink 3,
  • Figure 2 a transparent perspective partial representation of the heat sink 3
  • Figure 3 a side view of the heat sink 3
  • Figure 4 a transparent top view of the heat sink 3
  • Figure 5 an enlarged section of the Figure 4 .
  • the radiator 1 comprises only one such heat sink 3, according to other exemplary embodiments a plurality of such heat sinks 3, which are arranged one behind the other for example along the Y direction.
  • the heat sink 3 is flat, so that it extends essentially in an XZ plane of the coordinate system shown and in the Y direction has a small extent in comparison to its dimensions in the X direction and the Y direction.
  • the heat sink 3 has a plurality of (five in the exemplary embodiment shown) cooling tubes 5 for receiving cooling liquid.
  • the cooling tubes 5 are spaced apart from one another along the X direction and each run parallel to a longitudinal axis of the radiator 1 extending in the Z direction, so that two adjacent cooling tubes 5 are separated from one another by a separating gap 7 extending in the Z direction .
  • the cooling body 3 has a cooling fluid inlet region 9 with an inlet opening 11 for the inlet of cooling fluid into the cooling body 3, the cooling fluid inlet region 9 having an upper, first end 13 of each cooling tube 5 for guiding cooling fluid from the cooling fluid inlet region 9 into the cooling tube 5 is connected.
  • the heat sink 3 has a coolant outlet region 15 with an outlet opening 17 for discharging coolant from the heat sink 3, the coolant outlet region 15 having a lower, second end 19 of each cooling tube 5 is connected to conduct cooling fluid from the cooling tube 5 into the cooling fluid outlet region 15.
  • FIG. 6 shows a cross-sectional view of a cooling tube 5 in an XY plane.
  • Each cooling tube 5 consists of two opposing cooling tube walls 21, which are each made of sheet steel, for example.
  • Each cooling tube wall 21 has two edge regions 23 running in the Z direction and an elastically deformable central region 25 connecting these two edge regions 23.
  • the central region 25 is essentially flat in the undeformed state.
  • Each edge region 23 is designed as a shaft which is curved to an outside of the cooling tube wall 21 and has a shaft crest running in the Z direction.
  • each edge region 23 ends in a flange region 27 facing away from the central region 25 of the respective cooling tube wall 21, which flange region is connected, for example welded, to a corresponding flange region 27 of the other cooling tube wall 21.
  • the heat sink 3 is closed in a coolant-tight manner except for the inlet opening 11 and the outlet opening 17, so that, apart from through the inlet opening 11 and the outlet opening 17, no coolant can enter or leave the heat sink 3.
  • FIG 7 shows schematically an embodiment of a transformer 100.
  • the transformer 100 comprises a transformer tank 102, which can be at least partially filled with a cooling liquid, a radiator 1 according to one of the above using the Figures 1 to 6 Exemplary embodiments described, a first connecting line 104 for guiding coolant from the transformer tank 102 into the radiator 1 and a second connecting line 106 for guiding coolant from the radiator 1 into the transformer tank 102.
  • the transformer 100 optionally comprises a tap changer 108 arranged in the transformer tank 102 and / or a degassing device 110 preferably arranged on an upper side of the transformer tank 102 and / or a drying device 112 arranged on the transformer tank 102.
  • the transformer tank 102 preferably has a common cooling liquid space for the Step switch 108 and an active part (not shown in detail) of the transformer 100.
  • the first connecting line 104 is designed, for example, as a collecting pipe running between the transformer tank 102 and the radiator 1, which is connected to each heat sink 3 of the radiator 1 through an opening in the collecting pipe to the inlet opening 11 of the respective heat sink 3.
  • the second connecting line 106 is correspondingly designed, for example, as a collecting pipe running between the transformer tank 102 and the radiator 1, which is connected to each heat sink 3 of the radiator 1 through an opening in the collecting pipe to the outlet opening 17 of the respective heat sink 3.
  • the tap changer 108 is used to set a voltage transformation ratio of the transformer 100 and preferably comprises at least one vacuum interrupter (not shown in more detail).
  • the degassing device 110 serves to discharge gas from the transformer tank 102, which, for. B. outgassed from the coolant.
  • the drying device 112 serves to dehumidify the cooling liquid.
  • the transformer 100 does not include an additional expansion vessel for receiving cooling liquid from the transformer tank 102 in the event of a thermal expansion of cooling liquid in the transformer tank 102.
  • the function of such an expansion tank is taken over by the radiator 1, which expands the cooling liquid in this way by increasing the thermal expansion of the Cooling tubes 5 des Radiator 1 enclosed volumes compensated by elastic deformations of the cooling tube walls 21 of the cooling tubes 5.
  • a transformer 100 include a plurality of radiators 1, which are arranged, for example, on different sides of the transformer tank 102, and / or a plurality of connecting lines 104, 106 for conducting coolant between the transformer tank 102 and the radiator 1 or the radiators 1.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transformer Cooling (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Claims (12)

  1. Radiateur (1) de refroidissement d'un liquide de refroidissement d'un transformateur (100), le radiateur (1) comprenant
    - au moins un refroidisseur (3) ayant, pour la réception de liquide de refroidissement, plusieurs tubes (5) de refroidissement à distance les uns des autres et s'étendant parallèlement à un axe longitudinal du refroidisseur (3),
    - dans lequel chaque tube (5) de refroidissement a au moins une paroi (21) s'étendant suivant l'axe longitudinal du refroidisseur (3) et constituée de manière déformable élastiquement pour agrandir le volume entouré par le tube (5) de refroidissement,
    dans lequel
    - les tubes (5) de refroidissement sont disposés à distance les uns des autres, les uns à côté des autres, suivant une direction X et s'étendent chacun parallèlement à un axe longitudinal, s'étendant dans une direction Z, du radiateur (1), de manière à ce que, respectivement deux tubes (5) de refroidissement voisins soient séparés l'un de l'autre par un intervalle (7) de séparation s'étendant dans la direction Z,
    et caractérisé en ce que
    au moins une paroi (21) déformable élastiquement de tube de refroidissement a deux parties (23) de bord s'étendant suivant l'axe longitudinal du refroidisseur (3) et une partie (25) médiane déformable élastiquement reliant ces deux parties (23) de bord, la partie (25) médiane étant, à l'état non déformé, constituée sensiblement plane et chaque partie (23) de bord étant constituée sous la forme d'une ondulation cintrée vers un côté extérieur de la paroi (21) de tube de refroidissement et ayant une crête d'ondulation s'étendant parallèlement à l'axe longitudinal du refroidisseur (3) .
  2. Radiateur (1) suivant la revendication 1,
    caractérisé en ce qu'au moins un tube (5) de refroidissement a deux parois (21) opposées l'une à l'autre.
  3. Radiateur (1) suivant la revendication 2,
    caractérisé en ce que les parties (23) de bord se prolongent chacune en une partie (27) de bride, qui s'étend parallèlement à l'axe longitudinal du refroidisseur (3), qui est loin de la partie (25) médiane de la paroi (21) respective de tube de refroidissement et qui est reliée d'une manière étanche au liquide de refroidissement à une partie (27) de bride correspondante de l'autre paroi (21) de tube de refroidissement.
  4. Radiateur (1) suivant l'une des revendications précédentes,
    caractérisé en ce que la paroi (21) déformable élastiquement de tube de refroidissement est fabriquée en une tôle d'acier.
  5. Radiateur (1) suivant l'une des revendications précédentes,
    caractérisé en ce que chaque refroidisseur (3) a au moins une partie (9) d'entrée de liquide de refroidissement, ayant une ouverture (11) d'entrée pour l'entrée de fluide refroidissement dans le refroidisseur (3), la partie (9) d'entrée de liquide de refroidissement communiquant avec une première extrémité (13) d'au moins un tube (5) de refroidissement pour conduire du liquide de refroidissement de la partie (9) d'entrée de liquide de refroidissement au tube (5) de refroidissement.
  6. Radiateur (1) suivant l'une des revendications précédentes,
    caractérisé en ce que chaque refroidisseur (3) a au moins une partie (15) de sortie de liquide de refroidissement, ayant une ouverture (17) de sortie pour la sortie de liquide de refroidissement du refroidisseur (3), la partie (15) de sortie de liquide de refroidissement communiquant avec une deuxième entrée (19) d'au moins un tube (5) de refroidissement pour conduire du liquide de refroidissement du tube (5) de refroidissement à la partie (15) de sortie de liquide de refroidissement.
  7. Radiateur (1) suivant l'une des revendications précédentes,
    caractérisé par plusieurs refroidisseurs montés les uns derrière les autres.
  8. Transformateur (100), comprenant
    - une cuve (102) de transformateur, qui peut être emplie, au moins en partie, d'un liquide de refroidissement,
    - un radiateur (1) suivant l'une des revendications précédentes, pour refroidir le liquide de refroidissement,
    - au moins un premier conduit (104) de communication pour conduire du liquide de refroidissement de la cuve (102) du transformateur au radiateur (1)
    - et au moins un deuxième conduit (106) de liaison pour conduire du liquide de refroidissement du radiateur (1) à la cuve (102) du transformateur.
  9. Transformateur (100) suivant la revendication 8,
    caractérisé par un commutateur (108) à gradin, qui comprend au moins une chambre d'interrupteur à vide.
  10. Transformateur (100) suivant la revendication 8 ou 9,
    caractérisé en ce que la cuve (102) du transformateur a un espace commun de liquide de refroidissement pour un commutateur (108) à gradin et pour une partie active du transformateur (100).
  11. Transformateur (100) suivant l'une des revendications 8 à 10,
    caractérisé par un dispositif (110) de dégazage pour évacuer du gaz de la cuve (102) du transformateur.
  12. Transformateur (100) suivant l'une des revendications 8 à 11,
    caractérisé par un dispositif (112) de séchage pour déshumidifier le liquide de refroidissement.
EP14186769.7A 2014-09-29 2014-09-29 Radiateur destiné au refroidissement d'un liquide de refroidissement d'un transformateur Active EP3001434B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14186769.7A EP3001434B1 (fr) 2014-09-29 2014-09-29 Radiateur destiné au refroidissement d'un liquide de refroidissement d'un transformateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14186769.7A EP3001434B1 (fr) 2014-09-29 2014-09-29 Radiateur destiné au refroidissement d'un liquide de refroidissement d'un transformateur

Publications (2)

Publication Number Publication Date
EP3001434A1 EP3001434A1 (fr) 2016-03-30
EP3001434B1 true EP3001434B1 (fr) 2020-06-10

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EP14186769.7A Active EP3001434B1 (fr) 2014-09-29 2014-09-29 Radiateur destiné au refroidissement d'un liquide de refroidissement d'un transformateur

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3822568A1 (fr) 2019-11-14 2021-05-19 Siemens Energy Global GmbH & Co. KG Radiateur permettant de refroidir un transformateur ou une bobine d'inductance

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB879200A (en) * 1956-10-31 1961-10-04 Washington Engineering Ltd Improvements in or relating to tubular heat exchangers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1971624U (de) * 1967-07-12 1967-11-02 Paul Gatterbauer Apparatebehaelter in abgeschlossener druckdichter bauweise.
JPS5249418A (en) * 1975-10-17 1977-04-20 Kozo Shiaku Conservator panel peplacing conservator of oil-immersed transformer
DE10010737C2 (de) * 2000-03-04 2002-01-10 Alstom Paris Radiator für einen elektrischen Transformator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB879200A (en) * 1956-10-31 1961-10-04 Washington Engineering Ltd Improvements in or relating to tubular heat exchangers

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