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WO2006057516A1 - The cooler for transformer using refrigeration cycle - Google Patents

The cooler for transformer using refrigeration cycle Download PDF

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Publication number
WO2006057516A1
WO2006057516A1 PCT/KR2005/003979 KR2005003979W WO2006057516A1 WO 2006057516 A1 WO2006057516 A1 WO 2006057516A1 KR 2005003979 W KR2005003979 W KR 2005003979W WO 2006057516 A1 WO2006057516 A1 WO 2006057516A1
Authority
WO
WIPO (PCT)
Prior art keywords
transformer
refrigeration cycle
evaporator
cooler
radiator
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.)
Ceased
Application number
PCT/KR2005/003979
Other languages
French (fr)
Other versions
WO2006057516A8 (en
Inventor
Seong-Hwang Rim
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.)
Individual
Original Assignee
Individual
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
Priority claimed from KR20-2004-0035075U external-priority patent/KR200378014Y1/en
Priority claimed from KR20-2005-0005335U external-priority patent/KR200385032Y1/en
Application filed by Individual filed Critical Individual
Publication of WO2006057516A1 publication Critical patent/WO2006057516A1/en
Publication of WO2006057516A8 publication Critical patent/WO2006057516A8/en
Anticipated expiration legal-status Critical
Ceased 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
    • H01F27/085—Cooling by ambient air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B11/00—Compression machines, plants or systems, using turbines, e.g. gas turbines
    • F25B11/02—Compression machines, plants or systems, using turbines, e.g. gas turbines as expanders
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/14—Power generation using energy from the expansion of the refrigerant
    • F25B2400/141—Power generation using energy from the expansion of the refrigerant the extracted power is not recycled back in the refrigerant circuit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • the present invention relates to the cooler for transformer.
  • the heat applied to the transformer is largely divided into 2 components.
  • the first is the heat applied from outside of the transformer and the second is the heat of winding loss and core loss that comes in operation of the transformer.
  • This heat gives an influence to the temperature of the insulation oil and gives an impact to the performance of the winding insulation. And it becomes a key factor of the decision of the capacity and the lifetime of the transformer.
  • ONAN Natural oil, Natural air cooling
  • OFAF Forced oil, Forced air cooling
  • OFWF Forced oil, Forced water cooling
  • the cooling method is very important for the decision of the capacity and the lifetime of the transformer, but we have only the methods of ONAN(Natural oil, Natural air cooling), OFAF (Forced oil, Forced air cooling), OFWF (Forced oil, Forced water cooling) and etc. not the method of the application of refrigeration cycle for the cooling of the transformer. It can be the reason that it is not economical to apply refrigeration cycle for the cooling method of the transformer because this method will use much energy in the operation of the cooler. But we can find that the times that the transformer is forced to the high temperature are very short through the analysis of the temperature forced to the transformer for one year. The heat applied to the transformer is not problem for the other times.
  • This invention suggests the method of cooling of the transformer using refrigeration cycle including circulation of insulation oil to remove the severe heat applied in the short time instead of the methods of ONAN(Natural oil, Natural air cooling), OFAF (Forced oil, Forced air cooling), OFWF (Forced oil, Forced water cooling) and etc.. It can be named OFRC (Forced oil, Refrigeration cycle cooling).
  • This method can adopts one of three refrigeration cycles such as Closed-Loop Refrigeration cycle, Re-Generation Refrigeration cycle and Open-Loop Refrigeration cycle according to the operation condition.
  • the general refrigeration cycle is Closed-Loop Refrigeration cycle.
  • the Re-Generation Refrigeration cycle adopts the theory of 0TEC(0cean thermal energy conversion) to recover the loss energy of the transformer effectively.
  • the electric energy or the mechanical energy will be obtained through the turbine 26 inserted between the evaporator 21 and the compressor 25 in the Closed-Loop Refrigeration cycle as a by-product using the force of the evaporated refrigerant.
  • the refrigerant tank 23 can be omitted in the Closed-Loop Refrigeration cycle and the Re-Generation Refrigeration cycle.
  • the radiator 11 of the transformer can be cooled by the evaporated refrigerant in the evaporator 21 through the expansion valve(or the capillary) 22, if the operator of the transformer want to cool the transformer.
  • the refrigerant like as liquid nitrogen or liquid air can be made in the other spot or in the other time and it does not increase the peak load of the electricity load at the spot or at the time that the cooler of the Open-Loop Refrigeration cycle is operated.
  • the Inner-evaporator type, The Outer-evaporator type and The Adiabatic-outer-evaporator type are suggested to enhance the efficiency of the cooler or to be cooled by air in case the cooler is not operated by forced power.
  • This heat exchanger can be adhered to the transformer and can be located the other spot separated from the transformer with the connection of the extended insulation oil pipe 62 to enhance the utilization of the spaces of the substation.
  • We can increase the capacity of the transformer and prevent the inner fault from the becoming of the winding insulation weak from the increase of the temperature by adopting the powerful cooler suggested in present invention through the elimination of the severe heat applied to the transformer in the short times.
  • the present invention can eliminate effectively the problems such as a fault of the transformer from vibrations and noises occurred by the fan adopted in the forced air cooler through the removal of the fan to the other spot.
  • the cooler for the transformer using refrigeration cycle from present invention includes the cooler controller operated automatically by the difference of the temperature of the transformer and the temperature of reference.
  • FIG. 1. illustrates the outward show of the existing transformer and its cooler.
  • the size of the transformer becomes larger because the body of the transformer 12 must have several parallel large radiators 11 to cool the transformer.
  • FIG 2a explains the Closed-Loop Refrigeration cycle adopted in present invention.
  • This cycle is composed with compressor 25, condenser 24, liquid refrigerant tank 23, expansion valve(or the capillary) 22 and evaporator 21.
  • the compressor 25 compress the evaporated refrigerant coming from evaporator 21.
  • the compressed refrigerant becomes liquid state at the condenser 24 with releasing heat and this liquid refrigerant flows to the liquid refrigerant tank 23 and is stored in.
  • the liquid refrigerant starts to be gasified and the volume becomes larger out of the expansion valve (or the capillary) 22.
  • the liquid refrigerant gasifies in the evaporator 21 through the absorption of the heat from the radiator 11 covered with evaporator 21.
  • the cycle is finished after the gasified refrigerant out of the evaporator 21 inflows to the compressor 25. It is in the range of present invention to exclude the liquid refrigerant tank 23 constructed between the expansion valve (or the capillary) 22 and the condenser 24. Also it is in the range of present invention to add the controller that works according to the aim of the transformer operator through the sensing of the temperature of the winging or insulation oil.
  • FIG 2b explains the Re-Generation Refrigeration cycle adopted in present invention.
  • a turbine 26 is added between evaporator 11 and compressor 25 in the Closed-Loop Refrigeration cycle explained in FIG 2a.
  • the generatorCor machine) 27 is constructed at the shaft of the turbine 26.
  • the gasified refrigerant rotate the turbine 26 before coming into the compressor 25 and the electricity energy or the mechanical energy is recovered at the generatorCor machine) 27.
  • This theory is the same to that of OTECCOcean Thermal Energy Conversion).
  • the other principles are the same of FIG 2a.
  • FIG 2c explains the Open-Loop Refrigeration cycle adopted in present invention.
  • This cycle is composed with evaporator 21, expansion valveCor the capillary) 22 and liquid refrigerant tank 23.
  • the liquid nitrogen or liquid air that does not make trouble to be released in the out door is stored in the liquid refrigerant tank 23.
  • the expansion valve (or the capillary) 22 the liquid refrigerant comes into the evaporator 21 and the liquid refrigerant become gasified state through the absorption of the heat from the radiator 11 covered with evaporator 21. After the gasified refrigerant is released to the out door the cycle is finished. All of the cooler suggested in present invention can adopt the three cycle explained in FIG 2a. FIG 2b. FIG 2c.
  • FIG 3. illustrates the inner-evaporator type cooler of the transformer by present invention.
  • the radiator 11 has a duplicated space.
  • the inner space is for evaporator 21 and the outer space is for the insulation oil to be cooled.
  • This type has two merits, the first is to decrease loss of cold energy and the second is to use the ability of air cooler when the refrigeration cycle is not operated.
  • FIG 4. illustrates the outer- evaporator type cooler of the transformer by present invention.
  • the evaporator 21 envelops the radiator 11.
  • the ability of the cooler is more strengthened than that of existing radiator 11.
  • FIG 5. illustrates the Adiabatic-outer-evaporator type of the transformer by present invention.
  • the adiabatic material 51 is envelops the outer of the evaporator 21 and the outer case 52 is added out of the adiabatic material 51 so the loss of the cold energy can be minimized.
  • FIG 6. illustrates the example of the additional radiator cooler.
  • the additional radiator 61 is constructed with the extended insulation oil pipe 62 connected T-branch type from the insulation oil pipe of one existing radiator 11.
  • the additional radiator 61 is located at the other spot separated from the transformer.
  • the cooling ability is enhanced by adopting the cooler of the present invention to the additional radiator 61.
  • FIG 7. illustrates the second example of the additional radiator cooler.
  • the additional radiator 61 is constructed with the extended insulation oil pipe 62 connected T-branch type from the insulation oil pipe of the two radiator 11.
  • the additional radiator 61 is located at the other spot separated from the transformer.
  • the cooling ability is enhanced by adopting the cooler of the present invention to the additional radiator 61.
  • FIG 8. illustrates the third example of the additional radiator cooler.
  • the additional radiator 61 is constructed with the extended insulation oil pipe 62 connected T-branch type from the body of the transformer.
  • the additional radiator 61 is located at the other spot separated from the transformer.
  • the cooling ability is enhanced by adopting the cooler of the present invention to the additional radiator 61. It is in the range of present invention to adopt the cooler suggested in FIG 3. and FIG 4 to the cooler to FIG 6, FIG 7 and FIG 8..
  • FIG 9. illustrates the example curve of the temperature for one year. We can see that the term of enforcing severe temperature to the transformer is very short. If the transformer is cooled only for this short term by powerful cooler the capacity of the transformer for the other long term will be increased. This decreases the loss of resources so it is economical.
  • FIG. 1. shows the outward show of the existing transformer and its cooler
  • FIG 2a explains the Closed-Loop Refrigeration cycle adopted in present invention.
  • FIG 2b explains the Re-Generation Refrigeration cycle adopted in present invention.
  • FIG 2c explains the Open-Loop Refrigeration cycle adopted in present invention.
  • FIG 3. illustrates the inner-evaporator type cooler of the transformer by present invention.
  • FIG 4. illustrates the outer-evaporator type cooler of the transformer by present invention
  • FIG 5. illustrates the Adiabatic- outer- evaporator type of the transformer by present invention
  • FIG 6. illustrates the example of the additional radiator cooler.
  • FIG 7. illustrates the second example of the additional radiator cooler.
  • FIG 8. illustrates the third example of the additional radiator cooler
  • FIG 9. illustrates the example curve of the temperature for one year.
  • radiator 12 ' body of transformer
  • the example illustrated in FIG. 5. is the representative application.
  • the evaporator 21 envelopes the radiator 11 and the adiabatic material 51 envelops the evaporator 21 to decrease the loss of cold energy and the outer case envelops all of them at the out most.
  • Refrigeration cycle makes closed loop with five unit components through pipes.
  • the arrangement is generally evaporator 21, expansion valve(or the capillary) 22, liquid refrigerant tank 23, condenser 24 and compressor 25 repeatedly to evaporator 21.
  • the operation of the cooler is controlled by the controller that controls the expansion valveCor the capillary) 22 according to the control signal coming from the difference of the temperature of the transformer and that of operators' object. If we want to operate the Re -Generation Refrigeration cycle we construct the turbine 26 between evaporator 21 and compressor 25 and we construct the generator(or machine) 27 at the shaft of the turbine 26.
  • the cooler according to the present invention is very useful because the capacity of the existing transformer can be increased with slight exchange of the structure on the radiator 11.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Transformer Cooling (AREA)

Abstract

The present invention relates to a cooler for transformer using refrigeration cycle to eliminate the heat applied to the transformer. We can see that the term of the severe temperature applied to the transformer is very short by analysis of the temperature applied to the transformer for one year. The temperature of the transformer is low during the other term. This fact is the base of the present invention. The present invention intends to enlarge the capacity of the transformer and to prevent the breaking of insulation of the transformer through the elimination of the severe heat applied to the transformer that decides the capacity and the lifetime of the transformer. The present invention makes the efficient usage of the resources.

Description

The cooler for transformer using refrigeration cycle
Technical Field The present invention relates to the cooler for transformer.
The heat applied to the transformer is largely divided into 2 components. The first is the heat applied from outside of the transformer and the second is the heat of winding loss and core loss that comes in operation of the transformer. This heat gives an influence to the temperature of the insulation oil and gives an impact to the performance of the winding insulation. And it becomes a key factor of the decision of the capacity and the lifetime of the transformer. We have eliminated the heat applied to the transformer by the cooling methods of ONAN (Natural oil, Natural air cooling), OFAF (Forced oil, Forced air cooling), OFWF(Forced oil, Forced water cooling) and etc.. The present invention adopts the refrigeration cycle for the cooling method of the transformer newly.
Background Art According to the prior arts, the cooling method is very important for the decision of the capacity and the lifetime of the transformer, but we have only the methods of ONAN(Natural oil, Natural air cooling), OFAF (Forced oil, Forced air cooling), OFWF (Forced oil, Forced water cooling) and etc. not the method of the application of refrigeration cycle for the cooling of the transformer. It can be the reason that it is not economical to apply refrigeration cycle for the cooling method of the transformer because this method will use much energy in the operation of the cooler. But we can find that the times that the transformer is forced to the high temperature are very short through the analysis of the temperature forced to the transformer for one year. The heat applied to the transformer is not problem for the other times. But the severe heats applied to the transformer for the short times have made much problem like as reduction of the capacity and the lifetime of the transformer. We have wasted the resources through the construction of new transformer for the problem of the severe heat in the short times. The energy losses of the transformer, about 1 ~ 2% of the capacity of the transformer, are being wasted. If we have the method to recover the wasted energy, it is useful for the saving of the environment. But the reasonable method to recover the wasted energy is not suggested by now.
Disclosure of Invention
Summary of the Invention
We can find the fact that the duration time of the severe heat is very short and the temperature of the transformer drops rapidly in the temperature duration curve illustrated in the Fig. 9. This invention suggests the method of cooling of the transformer using refrigeration cycle including circulation of insulation oil to remove the severe heat applied in the short time instead of the methods of ONAN(Natural oil, Natural air cooling), OFAF (Forced oil, Forced air cooling), OFWF (Forced oil, Forced water cooling) and etc.. It can be named OFRC (Forced oil, Refrigeration cycle cooling). This method can adopts one of three refrigeration cycles such as Closed-Loop Refrigeration cycle, Re-Generation Refrigeration cycle and Open-Loop Refrigeration cycle according to the operation condition. The general refrigeration cycle is Closed-Loop Refrigeration cycle. The Re-Generation Refrigeration cycle adopts the theory of 0TEC(0cean thermal energy conversion) to recover the loss energy of the transformer effectively. The electric energy or the mechanical energy will be obtained through the turbine 26 inserted between the evaporator 21 and the compressor 25 in the Closed-Loop Refrigeration cycle as a by-product using the force of the evaporated refrigerant. The refrigerant tank 23 can be omitted in the Closed-Loop Refrigeration cycle and the Re-Generation Refrigeration cycle.
In case of Open-Loop Refrigeration cycle the radiator 11 of the transformer can be cooled by the evaporated refrigerant in the evaporator 21 through the expansion valve(or the capillary) 22, if the operator of the transformer want to cool the transformer. We can use liquid nitrogen or liquid air stored in the refrigerant tank 23 as the refrigerant that is in the low temperature state and makes no trouble to be released in the air. The refrigerant like as liquid nitrogen or liquid air can be made in the other spot or in the other time and it does not increase the peak load of the electricity load at the spot or at the time that the cooler of the Open-Loop Refrigeration cycle is operated. We can make three types of heat exchanger between the radiator 11 and the evaporator 21. The Inner-evaporator type, The Outer-evaporator type and The Adiabatic-outer-evaporator type are suggested to enhance the efficiency of the cooler or to be cooled by air in case the cooler is not operated by forced power. This heat exchanger can be adhered to the transformer and can be located the other spot separated from the transformer with the connection of the extended insulation oil pipe 62 to enhance the utilization of the spaces of the substation. We can increase the capacity of the transformer and prevent the inner fault from the becoming of the winding insulation weak from the increase of the temperature by adopting the powerful cooler suggested in present invention through the elimination of the severe heat applied to the transformer in the short times. The present invention can eliminate effectively the problems such as a fault of the transformer from vibrations and noises occurred by the fan adopted in the forced air cooler through the removal of the fan to the other spot. The cooler for the transformer using refrigeration cycle from present invention includes the cooler controller operated automatically by the difference of the temperature of the transformer and the temperature of reference.
Detail description of the Invention
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1. illustrates the outward show of the existing transformer and its cooler. The size of the transformer becomes larger because the body of the transformer 12 must have several parallel large radiators 11 to cool the transformer.
FIG 2a. explains the Closed-Loop Refrigeration cycle adopted in present invention. This cycle is composed with compressor 25, condenser 24, liquid refrigerant tank 23, expansion valve(or the capillary) 22 and evaporator 21. The compressor 25 compress the evaporated refrigerant coming from evaporator 21. The compressed refrigerant becomes liquid state at the condenser 24 with releasing heat and this liquid refrigerant flows to the liquid refrigerant tank 23 and is stored in. The liquid refrigerant starts to be gasified and the volume becomes larger out of the expansion valve (or the capillary) 22. The liquid refrigerant gasifies in the evaporator 21 through the absorption of the heat from the radiator 11 covered with evaporator 21. The cycle is finished after the gasified refrigerant out of the evaporator 21 inflows to the compressor 25. It is in the range of present invention to exclude the liquid refrigerant tank 23 constructed between the expansion valve (or the capillary) 22 and the condenser 24. Also it is in the range of present invention to add the controller that works according to the aim of the transformer operator through the sensing of the temperature of the winging or insulation oil.
FIG 2b. explains the Re-Generation Refrigeration cycle adopted in present invention. A turbine 26 is added between evaporator 11 and compressor 25 in the Closed-Loop Refrigeration cycle explained in FIG 2a. The generatorCor machine) 27 is constructed at the shaft of the turbine 26. The gasified refrigerant rotate the turbine 26 before coming into the compressor 25 and the electricity energy or the mechanical energy is recovered at the generatorCor machine) 27. This theory is the same to that of OTECCOcean Thermal Energy Conversion). The other principles are the same of FIG 2a.
FIG 2c. explains the Open-Loop Refrigeration cycle adopted in present invention. This cycle is composed with evaporator 21, expansion valveCor the capillary) 22 and liquid refrigerant tank 23. The liquid nitrogen or liquid air that does not make trouble to be released in the out door is stored in the liquid refrigerant tank 23. When we open the expansion valve (or the capillary) 22 the liquid refrigerant comes into the evaporator 21 and the liquid refrigerant become gasified state through the absorption of the heat from the radiator 11 covered with evaporator 21. After the gasified refrigerant is released to the out door the cycle is finished. All of the cooler suggested in present invention can adopt the three cycle explained in FIG 2a. FIG 2b. FIG 2c. and it is in the range of present invention to enhance the reliability of the operation through the parallel refrigeration cycle to overcome the fault of any part of the cycles. FIG 3. illustrates the inner-evaporator type cooler of the transformer by present invention. The radiator 11 has a duplicated space. The inner space is for evaporator 21 and the outer space is for the insulation oil to be cooled. This type has two merits, the first is to decrease loss of cold energy and the second is to use the ability of air cooler when the refrigeration cycle is not operated.
FIG 4. illustrates the outer- evaporator type cooler of the transformer by present invention. The evaporator 21 envelops the radiator 11. The ability of the cooler is more strengthened than that of existing radiator 11. FIG 5. illustrates the Adiabatic-outer-evaporator type of the transformer by present invention. The adiabatic material 51 is envelops the outer of the evaporator 21 and the outer case 52 is added out of the adiabatic material 51 so the loss of the cold energy can be minimized. FIG 6. illustrates the example of the additional radiator cooler. The additional radiator 61 is constructed with the extended insulation oil pipe 62 connected T-branch type from the insulation oil pipe of one existing radiator 11. The additional radiator 61 is located at the other spot separated from the transformer. The cooling ability is enhanced by adopting the cooler of the present invention to the additional radiator 61.
FIG 7. illustrates the second example of the additional radiator cooler. The additional radiator 61 is constructed with the extended insulation oil pipe 62 connected T-branch type from the insulation oil pipe of the two radiator 11. The additional radiator 61 is located at the other spot separated from the transformer. The cooling ability is enhanced by adopting the cooler of the present invention to the additional radiator 61. FIG 8. illustrates the third example of the additional radiator cooler. The additional radiator 61 is constructed with the extended insulation oil pipe 62 connected T-branch type from the body of the transformer. The additional radiator 61 is located at the other spot separated from the transformer. The cooling ability is enhanced by adopting the cooler of the present invention to the additional radiator 61. It is in the range of present invention to adopt the cooler suggested in FIG 3. and FIG 4 to the cooler to FIG 6, FIG 7 and FIG 8..
FIG 9. illustrates the example curve of the temperature for one year. We can see that the term of enforcing severe temperature to the transformer is very short. If the transformer is cooled only for this short term by powerful cooler the capacity of the transformer for the other long term will be increased. This decreases the loss of resources so it is economical.
Brief Description of Drawings
FIG. 1. shows the outward show of the existing transformer and its cooler
FIG 2a. explains the Closed-Loop Refrigeration cycle adopted in present invention.
FIG 2b. explains the Re-Generation Refrigeration cycle adopted in present invention. FIG 2c. explains the Open-Loop Refrigeration cycle adopted in present invention.
FIG 3. illustrates the inner-evaporator type cooler of the transformer by present invention.
FIG 4. illustrates the outer-evaporator type cooler of the transformer by present invention
FIG 5. illustrates the Adiabatic- outer- evaporator type of the transformer by present invention
FIG 6. illustrates the example of the additional radiator cooler. FIG 7. illustrates the second example of the additional radiator cooler.
FIG 8. illustrates the third example of the additional radiator cooler FIG 9. illustrates the example curve of the temperature for one year.
Description of the number of the Drawings
11 : radiator 12 '• body of transformer
13 : conservator 14 : bushing
21 : evaporator
22 : expansion valve(or the capillary)
23 : liquid refrigerant tank 24 '• condenser 25 : compressor 26 : turbine
27 '• generatorCor machine) 31 : insulation oil circulation pump 51 •' adiabatic material 52 : outer case
61 : additional radiator 62 : extended insulation oil pipe Best Mode for Carrying Out the invention
The example illustrated in FIG. 5. is the representative application. The evaporator 21 envelopes the radiator 11 and the adiabatic material 51 envelops the evaporator 21 to decrease the loss of cold energy and the outer case envelops all of them at the out most. Refrigeration cycle makes closed loop with five unit components through pipes. The arrangement is generally evaporator 21, expansion valve(or the capillary) 22, liquid refrigerant tank 23, condenser 24 and compressor 25 repeatedly to evaporator 21. The operation of the cooler is controlled by the controller that controls the expansion valveCor the capillary) 22 according to the control signal coming from the difference of the temperature of the transformer and that of operators' object. If we want to operate the Re -Generation Refrigeration cycle we construct the turbine 26 between evaporator 21 and compressor 25 and we construct the generator(or machine) 27 at the shaft of the turbine 26.
Industrial Applicability
The cooler according to the present invention is very useful because the capacity of the existing transformer can be increased with slight exchange of the structure on the radiator 11.

Claims

What is Claimed is
1. A cooling method of a transformer with the Closed-Loop
Refrigeration cycle or with the Re-Generation Refrigeration cycle or the Open-Loop Refrigeration cycle.
The Closed-Loop Refrigeration cycle is comprising: an evaporator 21; an expansion valveCor the capillary) 22; a liquid refrigerant tank 23; a condenser 24; a compressor 25; pipes that make closed loop according to the arranged order of the Closed-Loop Refrigeration cycle repeatedly to evaporator 21.
The Re-Generation Refrigeration cycle is comprising: a Closed-Loop Refrigeration cycle; a turbine 26 between evaporator 21 and compressor 25 in the Closed-Loop Refrigeration cycle.
The Open-Loop Refrigeration cycle is comprising: an evaporator 21; an expansion valveCor the capillary) 22; a liquid refrigerant tank 23; pipes that make the flow of the refrigerant.
2. A cooler for transformer using refrigeration cycle according to claim 1, wherein the evaporator 21 built up one of the form: the outer radiator 11 type; the inner radiator 11 type! the inner radiator 11 type that the adiabatic material 51 and the outer case 52 is envelop the evaporator 21 in order;
3. A cooler for transformer using refrigeration cycle according to claim 2, wherein the additional radiator 61 is constructed with the extended insulation oil pipe 62 connected one of the form:
T-branch type from the insulation oil pipe of one existing radiator 11;
T-branch type from the insulation oil pipe of the two existing radiator 11 ; T-branch type from the body of the transformer.
PCT/KR2005/003979 2004-11-24 2005-11-24 The cooler for transformer using refrigeration cycle Ceased WO2006057516A1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR20040033312U KR200375025Y1 (en) 2004-11-24 2004-11-24 Transformer cooling device using refrigerant vaporization heat of refrigeration cycle
KR20-2004-0033312 2004-11-24
KR20-2004-0035075U KR200378014Y1 (en) 2004-12-09 2004-12-09 Radiator-embedded transformer chiller using refrigeration cycle
KR20-2004-0035075 2004-12-09
KR20-2005-0005335 2005-02-28
KR20-2005-0005335U KR200385032Y1 (en) 2005-02-28 2005-02-28 Transformer chiller through spaced additional radiator refrigeration cycle

Publications (2)

Publication Number Publication Date
WO2006057516A1 true WO2006057516A1 (en) 2006-06-01
WO2006057516A8 WO2006057516A8 (en) 2006-07-27

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PCT/KR2005/003979 Ceased WO2006057516A1 (en) 2004-11-24 2005-11-24 The cooler for transformer using refrigeration cycle

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KR (1) KR200375025Y1 (en)
WO (1) WO2006057516A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2104116A1 (en) * 2008-03-12 2009-09-23 Alstom Transport S.A. Oil cooling system, particularly for transformers feeding traction electric motors, transformer with said system and method for determining the cooling fluid flow in a cooling system
EP2431985A1 (en) * 2010-09-16 2012-03-21 Starkstrom-Gerätebau GmbH Integrated cooling system
RU177199U1 (en) * 2017-05-23 2018-02-13 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" OIL TRANSFORMER COOLING UNIT WITH ELECTRIC CLEANING FILTER
RU180433U1 (en) * 2017-05-23 2018-06-14 Александр Михайлович Брянцев Three-phase reactor-transformer with adjustable saturation of the magnetic circuit
CN109935446A (en) * 2019-03-27 2019-06-25 国网山东省电力公司日照供电公司 A kind of radiating device of oil-immersed transformer
RU2717230C1 (en) * 2019-02-18 2020-03-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" Device of sf6-water cooling of oil transformer
CN111584195A (en) * 2020-05-26 2020-08-25 广东电网有限责任公司 Air cooling device of power transformer
RU2764732C1 (en) * 2021-03-22 2022-01-20 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" Oil transformer cooling device

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KR100764408B1 (en) 2006-03-22 2007-10-05 임성황 Transformer Cooling Device Using Power Generation Rankine Cycle
EP1999766A4 (en) * 2006-03-22 2013-01-02 Seong-Hwang Rim The cooler for transformer using generation cycle
KR102757071B1 (en) * 2023-08-22 2025-01-21 한국전력공사 Auxiliary cooling apparatus

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2104116A1 (en) * 2008-03-12 2009-09-23 Alstom Transport S.A. Oil cooling system, particularly for transformers feeding traction electric motors, transformer with said system and method for determining the cooling fluid flow in a cooling system
US7812699B2 (en) 2008-03-12 2010-10-12 Alstom Transport Sa Oil cooling system, particularly for transformers feeding traction electric motors, transformer with said system and method for determining the cooling fluid flow in a cooling system
RU2489763C2 (en) * 2008-03-12 2013-08-10 Альстом Транспорт Са Oil cooling system, particularly for transformers powering traction electric motors, transformer equipped with said system, and method of determining flow parameters of coolant liquid in cooling system
EP2431985A1 (en) * 2010-09-16 2012-03-21 Starkstrom-Gerätebau GmbH Integrated cooling system
WO2012035136A1 (en) * 2010-09-16 2012-03-22 Starkstrom-Gerätebau Gmbh Integrated cooling system
US9502867B2 (en) 2010-09-16 2016-11-22 Starkstrom-Geratebau Gmbh Integrated cooling system
RU177199U1 (en) * 2017-05-23 2018-02-13 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" OIL TRANSFORMER COOLING UNIT WITH ELECTRIC CLEANING FILTER
RU180433U1 (en) * 2017-05-23 2018-06-14 Александр Михайлович Брянцев Three-phase reactor-transformer with adjustable saturation of the magnetic circuit
RU2717230C1 (en) * 2019-02-18 2020-03-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" Device of sf6-water cooling of oil transformer
CN109935446A (en) * 2019-03-27 2019-06-25 国网山东省电力公司日照供电公司 A kind of radiating device of oil-immersed transformer
CN111584195A (en) * 2020-05-26 2020-08-25 广东电网有限责任公司 Air cooling device of power transformer
CN111584195B (en) * 2020-05-26 2021-04-23 广东电网有限责任公司 Air cooling device of power transformer
RU2764732C1 (en) * 2021-03-22 2022-01-20 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" Oil transformer cooling device

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