WO2001063629A1 - Systeme et procede de refroidissement de transformateurs - Google Patents

Systeme et procede de refroidissement de transformateurs Download PDF

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Publication number
WO2001063629A1
WO2001063629A1 PCT/CA2001/000195 CA0100195W WO0163629A1 WO 2001063629 A1 WO2001063629 A1 WO 2001063629A1 CA 0100195 W CA0100195 W CA 0100195W WO 0163629 A1 WO0163629 A1 WO 0163629A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
tubes
fins
cooling system
transformer
Prior art date
Application number
PCT/CA2001/000195
Other languages
English (en)
Inventor
Geoffrey Thomas Sheerin
Christopher C. Corke
Laurie John Brescacin
Original Assignee
Unifin International, 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 Unifin International, Inc. filed Critical Unifin International, Inc.
Priority to CA002401121A priority Critical patent/CA2401121A1/fr
Priority to AU2001237159A priority patent/AU2001237159A1/en
Priority to EP01909362A priority patent/EP1258017A1/fr
Priority to MXPA02008260A priority patent/MXPA02008260A/es
Priority to BR0108629-4A priority patent/BR0108629A/pt
Priority to JP2001562722A priority patent/JP2003524893A/ja
Priority to IL15139401A priority patent/IL151394A0/xx
Publication of WO2001063629A1 publication Critical patent/WO2001063629A1/fr

Links

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
    • F28D1/0233—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 air flow channels
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/16—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/16—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion
    • F28F1/18—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion the element being built-up from finned sections
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
    • 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
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
    • F28D2021/0031—Radiators for recooling a coolant of cooling systems

Definitions

  • This present invention relates generally to the field of transformer cooling and, more particularly, to a transformer dielectric fluid cooler using a fluid to air heat exchanger.
  • transformers in a variety of settings such as using large power transformers to step up voltage at large power plants for subsequent transmission and using smaller distribution transformers to step down voltage feeding residential and industrial communities.
  • Transformers can have rated outputs in the thousands of volts and can generate substantial heat during operation. If this heat is not properly dissipated, the heat can damage the transformer reducing its life expectancy or even rendering it inoperable.
  • Most large power transformers are immersed in dielectric fluid to insulate and cool the components.
  • Typical dielectric insulating fluids include standard mineral oils, high temperature mineral oils and high temperature synthetic fluids.
  • transformers can be sufficiently cooled by natural circulation of dielectric fluid or oil in the transformer and air surrounding the transformer (ONAN) .
  • the fluid circulates through the transformer core and exterior heat exchangers or coolers by natural thermal convection.
  • the cooler outside the transformer is designed to allow natural convection of air.
  • large heat exchangers are required because of the relative inefficiency of natural convection.
  • natural circulation of oil and forced air systems are used (ONAF) .
  • the dielectric fluid circulates through the transformer core and exterior coolers by natural thermal convection.
  • the heat exchanger or cooler outside the transformer is designed to accommodate fans that force air over the cooler. This improves the cooling characteristics of the heat exchangers thereby reducing the number of exchangers required to achieve the same amount of cooling. This also leads to smaller overall dimensions of the transformer/cooler combination .
  • forced oil and force air (OFAF) cooling is used.
  • the oil is forced through the transformer using a pump.
  • Increasing fluid velocity in the transformer allows for greater heat transfer between the heat exchanger material and the fluid.
  • air is forced over the heat exchanger thereby increasing the cooling efficiency of the heat exchanger.
  • the radiator is the most common heat exchanger used for cooling dielectric fluids in transformers. Radiators take on a variety of shapes and configurations. One type of cooler is a tube type radiator with carbon steel tubes welded into a pipe header. Another more common type of cooler is made out of carbon steel panels stacked to form a radiator unit. Theses radiators are used in a bank consisting of several individual radiator sections and they can be bolted directly on the side of the transformer. During operation, the dielectric fluid flows from the transformer into the steel panels by entering at the top of the radiator and exiting at the bottom. To achieve cooling, air flows vertically across the radiator panels and pulls the heat away from fluid. As discussed above, natural convection of the air may be insufficient to achieve the desired cooling characteristics.
  • fans are installed to facilitate air flow across the radiator panels to improve cooling.
  • the fans are typically installed such that air flows horizontally across the panels and thus, fails to take advantage of the natural thermal flow properties of the surrounding air.
  • the current radiator technology requires a large amount of space to cool the dielectric fluid. The individual radiator panels become less efficient as heat transfer mechanisms as the required amount of cooling increases.
  • Panel type radiators are generally constructed from thin material and have a welded seam around the periphery of each panel. This seam is a prime location for corrosion and the design needs to address this concern. Additionally, the carbon steel and other materials used in construction of radiators are relatively poor heat conductors.
  • the amount of dielectric fluid increases as the number and size of the radiators increase. As will be appreciated by those skilled in the art, this not only adds to the cost of the transformer but it also increases the weight and affects the center of gravity of the transformer requiring additional structural stiffening of the transformer tank.
  • the cooling system utilizes small fans that minimize the stress placed on the radiator.
  • the small fans do not move large volumes of air and, thus, if the design requires a significant amount of air cooling, many fans are required.
  • Using many fans creates other problems in the cooling system such as additional wiring, poor air distribution and increased maintenance and electrical losses.
  • a cooling system for cooling a dielectric insulating fluid flowing through transformers.
  • the system includes one or more cooling tubes oriented to have a top opening and bottom opening.
  • Each tube has a plurality of radially projecting interior fins and exterior fins extending longitudinally therealong. Further, the tubes are interconnected along the longitudinal axis thereof by coupling portions of the exterior fins to form a bundle configuration.
  • One or more distributor headers are provided that are in fluid communication between the transformer and the top openings of the cooling tubes.
  • one or more collector headers are provided that are in fluid communication between the transformer and the bottom openings of the cooling tubes.
  • a plurality of vertical air channels are formed by the exterior fins of the bundle configuration.
  • a method for cooling dielectric insulating fluid flowing through transformers is provided.
  • dielectric insulating fluid is circulated from a transformer through one or more vertical tubes and an air stream is circulated through vertical air channels formed by the interconnection of the tubes to cool the dielectric insulating fluid.
  • a system and method are provided for cooling transformers utilizing a fluid to air heat exchanger to cool dielectric fluid flowing through the transformer.
  • the system includes multiple aluminum cooling tubes in fluid communication with the transformer to cool the dielectric fluid.
  • the tubes are configured to create vertical air passages such that the system utilizes counter current natural convection air flow to cool the fluid.
  • Fig. 1 is a perspective view of a preferred transformer cooling system placed in relation to an electric transformer
  • Fig. 2 is a side elevational view ot the preferred transformer cooling system of Fig. 1 placed in relation to a schematically shown electric transformer;
  • Fig. 3 is an enlarged, fragmentary end elevation view of the present invention, taken along line 3-3 in the direction of the arrow shown in Fig. 2;
  • Fig. 4 is an enlarged cross-sectional view of the cooling tubes of the present invention, taken along line 4-4 in the direction of the arrow shown in Fig. 3;
  • Fig. 5 is a side elevational view of the preferred transformer cooling system of Fig. 2 with portions of the electric transformer broken away to further illustrate the dielectric fluid flow and air flow during operation of the present invention.
  • a cooling system of the present invention is designated generally by the reference numeral 10.
  • the cooling system 10 is designed to cool a dielectric insulating fluid used to thermally and electrically insulate the windings and other internal parts of an electric transformer using a fluid to air heat exchanger.
  • the cooling system 10 is comprised of multiple cooling tubes 12 in fluid communication with an electric transformer 14 via one or more distributor headers 16 and collector headers 18.
  • the distributor headers 16 connect the upper vertical portion of transformer 14 to the upper portions of the cooling tubes 12.
  • the collector headers 18, symmetrically identical to the distributor headers 16, connect the lower vertical portion of the transformer 14 to the lower portions of the cooling tubes 12.
  • numerous hardware configurations are available to connect the cooling tubes 12 to the transformer 14 and they are understood to be included within the teachings of this invention.
  • Fig. 3 is a fragmentary end elevation view of the cooling system 10, taken along line 3-3 in the direction of the arrows shown in Fig. 2.
  • each of the distributor headers 16 has a manifold 20 in fluid communication with the transformer.
  • One or more airfoil extensions 22 extend outwardly from and are in fluid communication with the manifold 20.
  • the bottom surface of each of the airfoil extensions 22 has a plurality of openings or apertures (not shown) that connect with the upper portions of the cooling tubes 12, and are in fluid communication therewith, to complete the connection to the transformer 14.
  • the collector headers 18 are symmetrically identical to the distributor headers 16 and consist of a manifold 24 and corresponding airfoil extensions 26 in fluid communication with the lower portions of the cooling tubes 12.
  • the cooling system includes multiple cooling tubes 12 in fluid communication with the transformer.
  • Fig. 4 illustrates an enlarged cross-sectional view of the cooling tubes 12 taken along line 4-4 shown in Fig. 3.
  • the cooling tubes 12 are preferably round and manufactured from extruded aluminum. Aluminum has advantageous properties in that it is a good heat conductor, is light weight and does not corrode. As would be understood, any material having these characteristics would be included within the teachings of this invention.
  • each cooling tube 12 has a vertical fluid channel 28 and a plurality of spaced exterior fins that allow the multiple cooling tubes 12 to be connected to each other in such a way as to form vertical air channels 30 in a honeycomb type configuration.
  • each cooling tube 12 has a wall 32, six spaced, radially extending interior fins 34, six spaced, radially extending exterior cooling fins 36, three spaced radially extending exterior claw fins 38 and three spaced radially extending exterior ball fins 40 alternatingly spaced between the exterior cooling fins 36. All of the fins extend longitudinally along the surface of the cooling tube wall 32 of each cooling tube 12.
  • the six interior fins 34 extend from the interior surface of the cooling tube wall 32, and are spaced evenly around the inner circumference of the cooling tube wall 32.
  • the interior fins 34 extend radially inwardly toward the center of the cooling tube 12 for a distance of approximately half the radius of the cooling tube. These interior fins 34 aid in drawing the heat away from the dielectric fluid as it flows through the cooling tube 12.
  • the twelve exterior fins 36, 38 and 40 extend longitudinally along the outer surface of cooling tube wall 32, and extend radially outwardly away from the cooling tube wall 32 for a distance of approximately the diameter of the cooling tube 12. Further, all of the interior and exterior fins 34, 36, 38, and 40 have longitudinal grooves or channels along the surfaces of the fins. This creates additional surface area to allow for greater cooling of the dielectric fluid flowing through the interior of cooling tube 12.
  • the exterior claw fins 38 and exterior ball fins 40 are connected to the tube wall 32 and spaced evenly around the circumference of the tube wall 32 between the exterior cooling fins 36 in an alternating manner.
  • the three exterior claw fins 38 and the three exterior ball fins 40 are positioned along the cooling tube wall 32 in a manner that when looking at the cooling tubes 12 in cross-section as in Fig. 4, these exterior fins 38 and 40 appear to be contiguous with the six interior fins 34, as if to project from the interior of the cooling tube 12 out through the cooling tube wall 32.
  • the fins are arranged such that when moving clockwise around the cooling tube wall 32, a cooling fin 36 is followed by a claw fin 38 which is followed by another cooling fin 36 which is then followed by a ball fin 40.
  • the claw fins 38 and ball fins 40 have a claw section 42 and a ball section 44, respectively, attached to their terminating ends.
  • the claw fins 38 and ball fins 40 are designed so that multiple tubes 12 can be connected together by mating the claw section 42 and ball section 44 to create a honeycomb type interlocking structure or bundle 46 for the cooling system.
  • the bundle 46 created by connecting the cooling tubes 12 to one another creates vertical air channels or passages 30.
  • the air channels 30 extend along the entire exterior surface of the cooling tube fins 36, 38 and 40 and allow air to travel vertically from the bottom of the cooling system 10 to the top using natural convection and thermal siphoning.
  • Thermal siphoning or the "chimney effect” occurs when the air trapped in the confined space created by the cooling tubes and their associated exterior fins expands quickly in the vertical direction. The quick expansion of air in the upward vertical direction generates a higher air flow velocity that results in greater heat transfer properties.
  • the chimney effect uses the natural properties of the flowing air and produces greater cooling of the dielectric fluid.
  • FIG. 5 is a schematic view of the cooling system and associated transformer of Fig. 2, further illustrating the dielectric fluid and air flow of the present invention.
  • heat produced by the transformer 14 causes the dielectric fluid 48 surrounding the transformer core 50 to convect up to the top of the transformer enclosure 52 and into the distributor headers 16.
  • the manifolds 20 within the distributor headers 16 receive the fluid 48 and as the fluid starts to cool, it descends down through the individual cooling tubes 12 via the airfoil extensions 22.
  • the dielectric fluid 48 cools rapidly in the cooling tubes 12 and descends down to the airfoil extensions 26 in the collection headers 18.
  • the fluid 48 then flows into the manifold 24 of collector header 18 and then into the transformer enclosure 52, where it is heated and the cycle starts over again.
  • several fluids can be utilized as dielectric fluids including mineral oils and high temperature synthetic fluids.
  • ambient air is drawn into the cooling system 10 in the direction shown by arrows 54 where it is first warmed slightly by the collection headers 18 at the lower portion of the cooling system 10. The air then passes upwardly through the vertical air channels 30 where it is heated, expands and speeds up. Finally, the air exits the cooling system 10 by flowing up past the distributor headers 16 to the ambient atmosphere in the direction shown by arrow 56, carrying the heat from the dielectric fluid 48 with it.
  • natural convection of the vertical air flow achieves more efficient cooling of the dielectric fluid.
  • other methods of vertical air flow through the cooling system are within the teachings of this invention.
  • forced air forced fluid and the combination of the two can be used to achieve further cooling ot the dielectric fluid.
  • fans 58 Figs. 2, 3 & 5 are connected to the bottom of bundles 46. This provides increased vertical air flow over the cooling tubes 12, which in turn provides greater cooling of the dielectric fluid.
  • Further cooling can be achieved by using a forced oil, natural air (OFAN) configuration.
  • Pumps (not shown) are installed on the interior of the transformer to increase the flow of the fluid across the core 50 and through the cooling tubes 12. This also has the effect of increasing the cooling of the dielectric fluid.
  • Combining forced oil, forced air (OFAF) provides even greater cooling characteristics of the cooling system.
  • the cooling system utilizes multiple vertical aluminum cooling tubes to remove heat from dielectric fluid used in electric transformers.
  • the connected tubes form vertical air channels that utilize natural convection and thermal siphoning to cool the dielectric fluid flowing through the cooling tubes.
  • thermal siphoning creates greater cooling of the fluid by using the natural thermal properties of the air flowing through the cooling system.
  • fewer cooling tubes are required to cool a transformer. Fewer cooling tubes results m a fluid to air heat exchanger structure that is significantly smaller and lighter than conventional transformer radiator designs. Size considerations are important in transformer designs, particularly for transformers used in areas with limited space, such as urban areas with limited land area for installing transformer substations. Smaller cooling systems also reduce the mechanical stress on the transformer. Further, less dielectric fluid is required to cool the transformer because of the fewer number of tubes.
  • cooling tubes are made of aluminum. This further reduces the weight of the radiator cooling system and prevents undue stress on the transformer structure. Aluminum is also a better heat conductor than carbon steel used in conventional transformer radiator designs.
  • Weld seams in transformer radiators are primary locations for corrosion.
  • the cooling system configured as discussed above utilizes approximately fifteen percent of the weld seams used in conventional transformer radiators and, thus, reduces the opportunities for deterioration of the cooling system structure.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Geometry (AREA)
  • Transformer Cooling (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

La présente invention concerne un système et un procédé permettant de refroidir des transformateurs au moyen d'un échangeur thermique à air servant à refroidir un fluide diélectrique circulant à travers le transformateur. Le système comprend de multiples tubes de refroidissement verticaux se trouvant en communication fluidique avec le transformateur de manière à refroidir le fluide diélectrique. Les tubes sont conçus pour produire des passages d'air verticaux de sorte que le système se sert d'un flux d'air de convection naturel et du siphonnement thermique pour refroidir le fluide.
PCT/CA2001/000195 2000-02-24 2001-02-20 Systeme et procede de refroidissement de transformateurs WO2001063629A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CA002401121A CA2401121A1 (fr) 2000-02-24 2001-02-20 Systeme et procede de refroidissement de transformateurs
AU2001237159A AU2001237159A1 (en) 2000-02-24 2001-02-20 System and method for cooling transformers
EP01909362A EP1258017A1 (fr) 2000-02-24 2001-02-20 Systeme et procede de refroidissement de transformateurs
MXPA02008260A MXPA02008260A (es) 2000-02-24 2001-02-20 Sistema y metodo para enfriar transformadores.
BR0108629-4A BR0108629A (pt) 2000-02-24 2001-02-20 Sistema e método para o resfriamento de transformadores
JP2001562722A JP2003524893A (ja) 2000-02-24 2001-02-20 変圧器を冷却する装置及び方法
IL15139401A IL151394A0 (en) 2000-02-24 2001-02-20 System and method for cooling transformers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18452000P 2000-02-24 2000-02-24
US60/184,520 2000-02-24

Publications (1)

Publication Number Publication Date
WO2001063629A1 true WO2001063629A1 (fr) 2001-08-30

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ID=22677228

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/000195 WO2001063629A1 (fr) 2000-02-24 2001-02-20 Systeme et procede de refroidissement de transformateurs

Country Status (12)

Country Link
US (1) US20010032718A1 (fr)
EP (1) EP1258017A1 (fr)
JP (1) JP2003524893A (fr)
KR (1) KR20030007441A (fr)
CN (1) CN1416580A (fr)
AU (1) AU2001237159A1 (fr)
BR (1) BR0108629A (fr)
CA (1) CA2401121A1 (fr)
IL (1) IL151394A0 (fr)
MX (1) MXPA02008260A (fr)
RU (1) RU2002122748A (fr)
WO (1) WO2001063629A1 (fr)

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WO2013091890A1 (fr) * 2011-12-23 2013-06-27 Schmehmann Rohrverformungstechnik Gmbh Radiateur de refroidissement à refroidissement par liquide
US8710946B2 (en) 2008-09-17 2014-04-29 General Electric Company Rupture resistant system
US8717134B2 (en) 2008-09-17 2014-05-06 General Electric Company System with directional pressure venting
ITVI20130201A1 (it) * 2013-07-31 2015-02-01 Convett S R L Radiatore in alluminio a tubi ellittici alettati.
US10217556B2 (en) 2015-11-03 2019-02-26 Carte International Inc. Fault-tolerant power transformer design and method of fabrication
WO2019228744A1 (fr) * 2018-05-30 2019-12-05 Siemens Aktiengesellschaft Transformateur
EP3905286A1 (fr) * 2020-04-30 2021-11-03 ABB Power Grids Switzerland AG Échangeur de chaleur et agencement électrique comprenant l'échangeur de chaleur

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US6742342B1 (en) 2003-05-13 2004-06-01 Praxair Technology, Inc. System for cooling a power transformer
US6967556B2 (en) * 2003-06-30 2005-11-22 International Business Machines Corporation High power space transformer
US7081802B2 (en) * 2004-03-31 2006-07-25 Praxair Technology, Inc. System for cooling a power transformer
DE102004054180A1 (de) * 2004-11-10 2006-05-11 Abb Technology Ag Wärmetauscher für einen Transformator
GB2439026B (en) * 2005-04-05 2009-10-28 Vetco Gray Scandinavia As An arrangement for heat transport or cooling
US8253076B2 (en) * 2007-10-29 2012-08-28 Smiths Medical Asd, Inc. Respiratory system heater unit
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KR101102522B1 (ko) * 2008-11-03 2012-01-03 현대중공업 주식회사 변압기용 히트파이프식 냉각장치
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CN105047367B (zh) * 2015-05-09 2017-03-15 陈学福 可拆卸连接有内翅片的变压器散热器
CN105374515A (zh) * 2015-11-19 2016-03-02 铜陵瑞博电子科技有限公司 一种油浸式变压器
DE102016200744A1 (de) 2016-01-20 2017-07-20 Siemens Aktiengesellschaft Transformator mit temperaturabhängiger Kühlung
CN105863238A (zh) * 2016-05-16 2016-08-17 江苏业强脚手架科技发展有限公司 一种折流增强换热型筒状脚手架
US9961806B2 (en) 2016-05-19 2018-05-01 Power Distribution Systems Development LLC Systems and methods for transformer cooling by vertical airflow
AT518986B1 (de) * 2016-10-07 2018-03-15 Dipl Ing Thomas Euler Rolle Wärmetauscher
JPWO2018139649A1 (ja) * 2017-01-30 2019-11-14 京セラ株式会社 熱交換器
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CA3053258C (fr) 2017-04-19 2023-05-09 Abb Schweiz Ag Systeme et procede de refroidissement
KR102363710B1 (ko) * 2017-05-10 2022-02-15 히타치 에너지 스위처랜드 아게 개선된 열 제거부를 구비한 전기 장치
KR102003346B1 (ko) * 2017-11-08 2019-07-24 김동빈 건식 변압기 냉각장치
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CN108717891A (zh) * 2018-06-26 2018-10-30 淄博鹏太电力设备有限公司 变压器散热装置以及散热方法
CN112912975A (zh) * 2018-10-19 2021-06-04 Abb电网瑞士股份公司 用于具有改进的冷却的变压器的散热器
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EP3905286A1 (fr) * 2020-04-30 2021-11-03 ABB Power Grids Switzerland AG Échangeur de chaleur et agencement électrique comprenant l'échangeur de chaleur
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CA2401121A1 (fr) 2001-08-30
AU2001237159A1 (en) 2001-09-03
BR0108629A (pt) 2003-12-23
RU2002122748A (ru) 2004-03-10
CN1416580A (zh) 2003-05-07
IL151394A0 (en) 2003-04-10
US20010032718A1 (en) 2001-10-25
KR20030007441A (ko) 2003-01-23
MXPA02008260A (es) 2002-11-29
EP1258017A1 (fr) 2002-11-20

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