EP1810303B1 - Echangeur thermique destine a un transformateur - Google Patents

Echangeur thermique destine a un transformateur Download PDF

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Publication number
EP1810303B1
EP1810303B1 EP05813600.3A EP05813600A EP1810303B1 EP 1810303 B1 EP1810303 B1 EP 1810303B1 EP 05813600 A EP05813600 A EP 05813600A EP 1810303 B1 EP1810303 B1 EP 1810303B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
opening
heat
transformer
medium
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 - Fee Related
Application number
EP05813600.3A
Other languages
German (de)
English (en)
Other versions
EP1810303A2 (fr
Inventor
Emil Bercea
Bo ASTRÖM
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz 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 ABB Schweiz AG filed Critical ABB Schweiz AG
Publication of EP1810303A2 publication Critical patent/EP1810303A2/fr
Application granted granted Critical
Publication of EP1810303B1 publication Critical patent/EP1810303B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • 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
    • 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
    • F28F2265/18—Safety or protection arrangements; Arrangements for preventing malfunction for removing contaminants, e.g. for degassing
    • 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

Definitions

  • the invention relates to a heat exchanger, in particular for a transformer, with a heat exchange medium, which is hineinleitbar via a feed element in a heat exchange element and via a drain element from the heat exchange element, with a first temperature measurement of an inlet flow of the heat exchange medium and a second temperature measurement of a flow stream of the heat exchange medium ,
  • transformers can be used for a variety of applications.
  • power transformers with a power to be transmitted of at least 5 MVA give it in operation from a considerable amount of heat, which is usually discharged through heat exchangers to the environment.
  • a cooling circuit is provided as a rule, so that the heat exchanger used can optionally be arranged remotely from the transformer.
  • a typical embodiment of such a heat exchange circuit provides that one or more, often identically designed heat exchanger are each supplied via an inlet connection with heat exchange medium.
  • a specially designed surface of the heat exchanger then ensures the best possible heat transfer to a second heat transfer medium, which is also involved as a recooling medium in the heat exchange process. This can be, for example, the surrounding air or a liquid, depending on how the heat exchanger is constructed.
  • the inlet temperature of the heat exchange medium and the outlet temperature from the heat exchanger of the heat exchange medium is measured.
  • special pipe sections are flanged directly to the inlet connection or the outlet connection of the heat exchanger, wherein in these pieces of pipe a dip tube is welded or screwed, which receives a thermometer.
  • the measured temperature in the flow or in the course of the heat exchanger is measured only with a certain time delay, since a change in temperature is first passed to the material of the thermowell and then to the thermometer.
  • the temperature measuring pipe pieces must be considered in the planning of the design of the transformer.
  • the dimensions of the transformer with the heat exchanger will be correspondingly large.
  • the patent document US 4 512 387 A discloses a heat exchanger according to the preamble of claim 1, in particular a system for recovering power loss of power transformers.
  • the cooling is carried out by heat exchanger comprehensive cooling circuits.
  • heat probes are provided in the cooling circuit.
  • the patent document US 2004/158428 A1 discloses a portable cooling system for power transformers, which has a controller, with the various operating modes of the cooling system can be realized. For this purpose, a plurality of sensors are provided, including temperature probes in the cooling circuit.
  • the heat exchanger according to the invention is characterized in that a first opening is arranged in the inlet element, which can be positioned in the inlet flow during operation of the heat exchanger, a first temperature probe to a predetermined location, and that a second opening is arranged in the discharge element, in the operation of the Heat exchanger, a second temperature probe is positioned at a predetermined location in the flow stream.
  • the temperature measurement is now carried out on the heat exchanger itself.
  • the construction is simplified and the possibilities in the arrangement of a heat exchanger with a transformer rise.
  • the position of the temperature measurement is now directly at the inlet or at the outlet of the heat exchange medium at the heat exchanger, so that on closed system prevented.
  • the sole FIGURE shows a radiator 10 which serves as a recooler for a cooling circuit of a power transformer, wherein neither the power transformer, nor other details of the cooling circuit are shown in this figure.
  • the regenerated with the radiator 10 power transformer has a power to be transmitted of about 15 MVA, in the example shown, the only radiator 10 is sufficiently dimensioned for the re-cooling of the heat generated by the power transformer.
  • radiator 10 in case of need, a plurality of such radiator 10 are connected in parallel in the cooling circuit or a cooling requirements corresponding heat exchanger surface is mounted on the radiator 10, so that the cooling capacity of this unit is increased appropriately.
  • the example shown shows the radiator 10 as a stationary heat exchanger, so that in the figure below with the geodetic "bottom” is meant.
  • an inlet connection 12 is shown in the figure at the top of the radiator 10, the flow direction of the inflowing coolant being indicated by a first arrow 14.
  • the inlet nozzle 12 is formed as a pipe piece, which is on the one hand connected to a radiator element 16 and on the other hand, a first flange 18, in particular for direct Connection to the power transformer or a connecting pipe of the coolant circuit is provided.
  • the incoming coolant in this example, a heat exchanger oil, which is often used in transformer cooling circuits, flows through the inlet port 12 to the radiator element 16, wherein the coolant flow is divided into a plurality of ribs 20, so that a plurality of coolant sub-streams are formed, the top down the cooling element 16 go through.
  • the coolant partial flows in turn collect to a common outflow stream. This common outflow flow passes through an outlet connection 22 back to the power transformer or into the coolant circuit.
  • the ribs 20 may be blown by the forced air flow, for example, by a forced flow of convention.
  • the generated air flow is so strong that sets a desired temperature of the coolant in the drain stream.
  • a first opening 24 in the inlet nozzle 12 is arranged.
  • the first sealing element 26 is still shown, which is arranged in the first opening 24.
  • a combined device of venting element and thermocouple medium-tight in the first opening 24 can be inserted. This combined device is not shown in the single FIGURE, but known in the art.
  • the venting device is necessary in particular when filling the coolant circuit or the radiator 10 in order to vent the air collecting at the highest points of the relevant circuit or the radiator 10, which air is gradually displaced by the cooling medium filled in the coolant circuit.
  • the assumption of a further technical function that can be realized according to the invention at the same location of the first opening 24 is the temperature measurement with a first thermocouple.
  • the first thermocouple can now be moved to a position in the pipe section of the inlet nozzle 12, which according to experience best corresponds to the actual inlet temperature of the cooler 10.
  • the first sealing element 26 seals the first thermocouple in the region of the first opening 24 against a possible coolant outlet from the cooling system.
  • the otherwise necessary immersion sleeve for sealing an opening in a pipeline is avoided.
  • the measured value is measured directly by the thermocouple in the coolant and not indirectly via the material of the immersion sleeve and thus damped and delayed. In this way, the measurement has become more accurate and faster.
  • a second opening 30 is disposed at a lower location of the pipe section of the downcomer 22 and provided with a second sealing element 32.
  • the second sealing element 32 is designed with a resilient plastic compound and completely closes the second opening 30, so that no coolant can escape in the inner region of the cooling element 16 or the drain neck 22 even if no thermocouple is inserted.
  • the plastic mass is designed so yielding and provided with a further opening through which the rod-like part of a second thermocouple through the plastic material and the second opening 30 can be inserted and fixed in a desired position.
  • thermocouple 34 is shown only symbolically.
  • a third aperture 36 is also located at a lower location of the radiator element 16, but spaced from the second aperture 30 so far that the devices inserted into the apertures 30, 36 do not interfere with each other.
  • a connecting element 38 Connected to the third opening 36 is a connecting element 38 which is suitable for receiving a discharge device, in this case a shut-off valve 40.
  • the shut-off valve 40 is shown only as a symbol and is designed for example as a shut-off ball valve or gate valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Transformer Cooling (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (6)

  1. Echangeur thermique destiné à un transformateur avec un fluide d'échangeur thermique, comprenant un tuyau d'arrivée, un élément d'échangeur thermique et un tuyau d'évacuation, dans lequel le fluide d'échangeur thermique peut être introduit dans l'élément d'échange thermique (16) par le tuyau d'arrivée (12) et évacué hors de l'élément d'échange thermique (16) par le tuyau d'évacuation (22),
    caractérisé en ce qu'une première ouverture (24) est disposée dans le tuyau d'arrivée (12), dans laquelle une première sonde de température est disposée à un endroit prédéterminé dans le courant d'arrivée pendant le fonctionnement de l'échangeur thermique, et en ce qu'une deuxième ouverture (30) est disposée dans le tuyau d'évacuation (22), dans laquelle une deuxième sonde de température (34) est disposée à un endroit prédéterminé dans le courant d'évacuation pendant le fonctionnement de l'échangeur thermique, de telle manière qu'une première mesure de température du fluide d'échangeur thermique soit réalisée dans le courant d'arrivée une deuxième mesure de température dans le courant d'évacuation du fluide d'échange thermique.
  2. Echangeur thermique selon la revendication 1, caractérisé en ce qu'un dispositif de purge d'air est disposé en plus dans la première ouverture (24).
  3. Echangeur thermique selon la revendication 1 ou 2, caractérisé en ce qu'un dispositif de vidange (40) est disposé en plus dans la deuxième ouverture (30).
  4. Echangeur thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que la première (24) et/ou la deuxième (30) ouverture présente un élément d'étanchéité (26, 32), par lequel la sonde de température correspondante (34) peut être introduite de façon étanche au fluide d'échange thermique.
  5. Echangeur thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que la sonde de température (34) est un thermocouple.
  6. Echangeur thermique selon l'une quelconque des revendications précédentes, caractérisé en ce que la sonde de température (34) est protégée par une douille d'immersion.
EP05813600.3A 2004-11-10 2005-11-07 Echangeur thermique destine a un transformateur Expired - Fee Related EP1810303B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004054180A DE102004054180A1 (de) 2004-11-10 2004-11-10 Wärmetauscher für einen Transformator
PCT/EP2005/011876 WO2006050886A2 (fr) 2004-11-10 2005-11-07 Echangeur thermique destine a un transformateur

Publications (2)

Publication Number Publication Date
EP1810303A2 EP1810303A2 (fr) 2007-07-25
EP1810303B1 true EP1810303B1 (fr) 2017-07-12

Family

ID=36217269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05813600.3A Expired - Fee Related EP1810303B1 (fr) 2004-11-10 2005-11-07 Echangeur thermique destine a un transformateur

Country Status (6)

Country Link
US (1) US9909825B2 (fr)
EP (1) EP1810303B1 (fr)
CN (1) CN101084560B (fr)
BR (1) BRPI0517304A (fr)
DE (1) DE102004054180A1 (fr)
WO (1) WO2006050886A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009005924A1 (de) 2008-06-16 2009-12-31 Thermo- control Körtvélessy GmbH Kompensiertes Thermoelementensystem
DE102009015377B4 (de) * 2008-06-27 2011-12-15 André Meuleman Kühlradiator für einen Transformator
DE102016207393A1 (de) * 2016-04-29 2017-11-02 Siemens Aktiengesellschaft Ersatztransformator mit modularem Aufbau
US10586645B2 (en) 2017-08-14 2020-03-10 Abb Power Grids Switzerland Ag Transformer systems and methods for operating a transformer system
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
EP3855261B1 (fr) * 2020-01-27 2024-05-15 ABB Schweiz AG Détermination des paramètres de commande pour un dispositif d'automatisation industrielle

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US2474155A (en) * 1945-06-15 1949-06-21 Julius F Melzer Heating apparatus
US3544938A (en) * 1969-06-12 1970-12-01 Tyee Construction Co Sealed power transformer
US3746079A (en) * 1972-01-21 1973-07-17 Black Sivalls & Bryson Inc Method of vaporizing a liquid stream
US4196408A (en) * 1974-01-14 1980-04-01 Rte Corporation High temperature transformer assembly
DE2938086C2 (de) * 1979-09-20 1981-08-13 Transformatoren Union Ag, 7000 Stuttgart Temperaturfühler zur Ermittlung der Kühlmitteltemperatur bei flüssigkeitsgekühlten Transformatoren
US4350838A (en) * 1980-06-27 1982-09-21 Electric Power Research Institute, Inc. Ultrasonic fluid-atomizing cooled power transformer
US4512387A (en) * 1982-05-28 1985-04-23 Rodriguez Larry A Power transformer waste heat recovery system
DE8911078U1 (de) * 1989-09-16 1989-11-23 MESSKO Albert Hauser GmbH & Co. KG, 6370 Oberursel Tauchfühler für Temperaturmessungen
US5267606A (en) * 1991-07-05 1993-12-07 Roland Cassia Vehicular flushing and draining apparatus and method
US5613549A (en) * 1994-11-21 1997-03-25 Dolwani; Ramesh J. Method and apparatus for selectively sealing and securing a sensor of a sealing plug to a part
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US5730356A (en) * 1995-08-01 1998-03-24 Mongan; Stephen Francis Method and system for improving the efficiency of a boiler power generation system
DE19609203A1 (de) * 1996-03-09 1997-09-11 Urich Manfred Mechanisch-elektrisches Kombinationsthermometer
US6031722A (en) * 1998-07-20 2000-02-29 Centre D'innovation Sur Le Transport D'energie Du Quebec Earth cooled distribution transformer system and method
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EP1258017A1 (fr) * 2000-02-24 2002-11-20 Unifin International, Inc. Systeme et procede de refroidissement de transformateurs
US7549461B2 (en) * 2000-06-30 2009-06-23 Alliant Techsystems Inc. Thermal management system
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Also Published As

Publication number Publication date
US9909825B2 (en) 2018-03-06
CN101084560A (zh) 2007-12-05
DE102004054180A1 (de) 2006-05-11
WO2006050886A2 (fr) 2006-05-18
WO2006050886A3 (fr) 2006-09-08
BRPI0517304A (pt) 2008-10-07
EP1810303A2 (fr) 2007-07-25
US20090000763A1 (en) 2009-01-01
CN101084560B (zh) 2011-04-20

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