KR200380359Y1 - Jacketed transformer chiller using refrigeration cycle - Google Patents

Abstract

The present invention encloses the radiator 11 of the transformer in the form of a jacket (31) and arranges the evaporator 71 of the refrigeration cycle therein to cool the heat generated from the transformer using the vaporization heat of the refrigerant. It relates to a cooling device.

In the transformer, heat is generated by no-load loss and load loss. If the heat is not removed, the insulating material surrounding the transformer winding is degraded by the deterioration phenomenon, and if the degree is severe, it causes the internal breakdown of the transformer by the insulation breakdown. Therefore, the transformer capacity is determined by the degree of cooling the heat applied to the transformer. The present inventors have devised a design for the [transformer cooling device using the refrigerant vaporization heat of the refrigeration cycle] and the application number 20-2004-0033312 [apparatus for the radiator-containing transformer cooling device using the refrigeration cycle]. However, these two designs require a lot of work for installation because the transformer radiator 11 must be modified or attached to the radiator 11 in a fixed state.

In the present invention, it is noted that the heat generation time of the transformer is not only a few hours of the year, and only when the heat problem occurs in the transformer, the radiator 11 is cooled with a jacket 31 type cooling device. In other times, the radiator 11 can be separated from the radiator 11 and the natural cooling effect of the radiator 11 can be obtained.

In addition, in the case of a transformer with a large number of radiators 11, a plurality of jackets 31 are connected in parallel to adjust the number of refrigeration cycles operating in accordance with the transformer temperature to enable optimal operation. In addition, a turbine 91 is installed between the evaporator 71 and the compressor 75 of the refrigeration cycle, and a generator (or a mechanical device) 92 is installed on the turbine shaft to produce power or physical energy.

Description

Jacketed transformer chiller using refrigeration cycle

Since the life of the transformer varies according to the degree of deterioration of the insulation wound around the transformer windings, the capacity related to the transformer allowable current may also depend on the method of removing heat applied to the transformer so that the winding insulation does not deteriorate. When the capacity is small, natural cooling is performed. When the capacity is large, the insulating oil is forced to circulate to the radiator, and the cooling fan installed around the radiator is operated to cool. In order to improve the cooling effect of the existing cooling device, the present inventors have applied the application number 20-2004-0033312 [transformer cooling device using refrigerant vaporization heat of a refrigeration cycle] and application number 20-2004-0035375 [radiator-containing transformer using a refrigeration cycle). Chiller]. However, in these two designs, the shape of the radiator 11 of the transformer must be modified or attached to the radiator 11 in a fixed state, so that the installation process may require a blackout or a lot of work.

In the present design, the transformer is only installed when the thermal problem occurs in a few hours of the year when the thermal problem occurs only a few hours, and a cooling device that can be easily separated if the thermal problem is eliminated Devise

In the case of transformers in which the radiators 11 are installed in a large number, the jackets 31 coated on the individual radiators 11 may be operated in parallel in order to effectively cool down the transformer by operating only some refrigeration cycles even if the jackets 31 are all coated. .

1 is a perspective view of a conventional transformer. It can be seen that a large number of large radiators 11 are attached to the transformer body 12 in parallel so that the total size of the transformer becomes larger.

2 is a conceptual diagram illustrating the connection between the transformer body 12 and the cooling radiator 11.

3 is an explanatory view of a jacket 31 and accessories according to the present invention. The size of the jacket 31 should be able to contain the target transformer radiator 11, the jacket parallel connector 32 on the left and right sides of the jacket 31 to enable parallel operation with the jacket 31 of the other left and right radiator (11). If you do not install and run in parallel to stop the cap (33). A through-flow groove 34 into which an oil pipe connecting the transformer body 12 and the radiator 11 is inserted is installed, and a jacket 38 is installed at the incision to open and close the space of the jacket 31. ) Auxiliary cover (35) and auxiliary cover coupling part (36) made of bulk tape (also known as a squeaker) are installed to prevent heat transfer by holes. The through-pass groove 34 and the through-pass groove band 37 are also made of bulk tape (also known as a squeaker) so as to be wrapped with the through-pass groove band 37 so as to prevent heat movement through the gap between the through-pass groove 34. It is also included in the scope of the present invention to install other switchgear, such as a snap button, instead of the jacquard 38. The jacket parallel connector 121 is used to connect with a nearby jacket. The left and right threads are formed in the opposite direction to rotate the jacket parallel connector 121 so that the left and right jackets 38 are coupled.

Figure 4 is a perspective view of the jacket front open state.

5 is an explanatory view of an example in which the engaging portion of the jacket 31 is modified so that the open portion of the jacket 31 can be in close contact with the transformer body 12. The transformer coupling part 51 is formed of a plurality of small pieces so that the transformer body 12 and the jacket 31 are in close contact with each other so as to include a magnet in a plane shape. The jacket 31 of this shape is also included in the scope of the present invention.

6 is a sectional view of the jacket. The basic jacket is formed in the order of the jacket jacket 61, the heat insulating material 62, the jacket jacket 63. In order to increase the cooling effect, a space partitioning surface 65 is installed between the jacket inner shell 61 and the heat insulating material 62, and ice dry ice 64 is inserted between the jacket inner shell 61 and the space partitioning surface 65. It is also included in the scope of the present invention. It is also within the scope of the present invention to cool only with ice and dry ice without operating the refrigeration cycle. Jacket jacket 63 is also included in the scope of the present invention to white to prevent the absorption of sunlight. Jacket jacket 63 is also included in the scope of the present invention to use a material of a plate-shaped hard material to maintain the shape of the jacket 31.

7 is an explanatory view of a refrigeration cycle. In the closed circuit cooling method, the refrigerant circulates in the closed circuit. The refrigeration cycle at this time is composed of a compressor 75, a condenser 74, a refrigerant storage tank 73, an expansion valve (or capillary tube) 72, the evaporator 71. The compressor 75 compresses the refrigerant in a gaseous state, and in the condenser 74, the compressed refrigerant dissipates heat to become liquid, and the refrigerant, which becomes liquid, is added to the refrigerant storage tank 73 installed to increase the inertia of the cooling system. As it is collected, the liquid refrigerant passes through expansion valve (or capillary tube) 72, causing a change in gaseous state and the volume begins to expand. The refrigerant exiting the expansion valve (or capillary tube) 72 becomes gas while absorbing heat of vaporization from the cooling space 77 in the evaporator 71 connected to the expansion valve (or capillary tube) 72. The gas passing through the evaporator 71 enters the compressor 75 and is compressed to end one cycle of the refrigeration cycle. It is also within the scope of the present invention to remove the refrigerant storage tank 73 installed between the expansion valve (or capillary tube) 72 and the condenser 74. In addition, it is also included in the scope of the present invention to add a control device for sensing the transformer winding temperature or the insulating oil temperature to smoothly operate the refrigeration cycle according to the user's will. The open cooling method is as follows. In the refrigerant storage tank 73 in which the externally made refrigerant is stored, the liquid refrigerant passes through the expansion valve (or capillary tube) 72 and changes into gas and the volume starts to expand. The refrigerant exiting the expansion valve (or capillary tube) 72 becomes gas while absorbing heat of vaporization from the cooling space 77 in the evaporator 71 connected to the expansion valve (or capillary tube) 72.

8 is a schematic diagram of a system for cooling a jacketed transformer using a refrigeration cycle. The evaporator 71 of the refrigeration cycle is installed to couple to the jacket endothelium 61 inside the jacket 31. And the connection valve 81 is installed so that the evaporator 71 inside the jacket 31 and the other refrigeration cycles outside are connected through the jacket 31.

9 is a diagram illustrating a jacketed transformer chiller system configuration in which a generator is added in the middle of a refrigeration cycle. A turbine 91 is installed between the evaporator 71 and the compressor 75, and a generator (or a mechanical device) is installed on the shaft of the turbine 91. The refrigerant evaporated in the evaporator 71 becomes a gas state by absorbing heat from the transformer radiator 11, and this gas has kinetic energy, so when the turbine 91 exists in the pipeline through which the gas passes, the refrigerant is rotated. In generators (or machinery), power or physical energy is produced.

FIG. 10 is a diagram illustrating a system of a jacketed transformer cooling system in which the evaporator 71 is modified so that the evaporator 71 can be inserted into the space between the radiators 11 to increase the heat exchange effect.

11 is a diagram illustrating a system of a jacketed transformer chiller system using cold air circulation. The evaporator 71 is installed in a separate space, not inside the jacket 31, and cools the cool air therein through the cold air circulation fan 111 and the cold air circulation tube 112 to cool the heat of the radiator 11 inside the jacket.

12 is an explanatory view of a jacketed transformer cooling device in which a jacket 31 is connected in parallel. It is shown that the jacket 31 coated on each radiator 11 is interconnected through the jacket parallel connection tube 121. In consideration of the heat of the radiator 11, the optimum operation can be induced by determining the number of refrigeration cycles to be operated through the control device.

By cooling the heat applied to the transformer using the refrigerant vaporization heat by the refrigeration cycle, the heat can be effectively cooled to increase the capacity of the transformer and increase efficiency. In addition, in the case of wind cooling, there is a possibility of providing a cause of a transformer failure due to vibration of the fan, but a cooling device using a refrigeration cycle can remove it. It is also possible to modify the structure of the radiator 11 of the transformer and install the cooling facility as a permanent facility. When the problem is to wear a cooling device, the other time to separate the cooling device to the natural cooling by the radiator 11 can increase the efficiency of the cooling energy.

1 is a perspective view of a conventional transformer.

2 is a conceptual diagram illustrating a transformer main body and a cooling radiator.

3 is an explanatory view of a jacket and accessories according to the present invention.

4 is a perspective view of the jacket front open state.

5 is an explanatory view of a jacketed transformer cooling device in which a transformer coupling portion is modified.

6 is a sectional view of the jacket.

7 is an explanatory view of a refrigeration cycle.

8 is a diagram illustrating a system of a jacketed transformer chiller system using a refrigeration cycle.

9 is a schematic diagram of a jacketed transformer chiller system with an additional generator.

10 is a schematic view of a jacketed transformer chiller system configuration in which the evaporator structure is modified.

11 is a schematic diagram of a system for cooling a jacketed transformer through a cold air circulation.

12 is an explanatory view of a jacketed transformer cooling device in which jackets are connected in parallel.

<Description of the code | symbol about the principal part of drawing>

11: radiator 12: transformer body

13: Conservator 14: Bushing

21: Insulation circulating pump 31: Jacket

32: jacket parallel connector 33: stopper

34: through-through groove 35: auxiliary cover

36: auxiliary cover coupling portion 37: through-pass groove band

38: Jacques 51: transformer coupling part

61 jacket jacket 62 insulation

63: jacket jacket 64: ice dry ice

65: space partition 71: evaporator

72: expansion valve (or capillary tube) 73: refrigerant storage tank

74: condenser 75: compressor

76: motor (or engine) 77: cooling space

81: refrigerant pipe connection valve 91: turbine

92: generator (or machinery) 111: cold air circulation fan

112: cold air circulation pipe 121: jacket parallel connection pipe

Claims (1)

Jacket (31), jacket parallel connector (32), jacket parallel connector (121), plug (33), through hole (34), jacket (38), auxiliary cover (35), auxiliary to surround radiator (11) A jacket body composed of a cover engaging portion 36; An evaporator 71 installed inside the jacket 31; A connecting valve 81 for connecting an inlet / outlet tube of the evaporator 71 to an external refrigeration cycle; A refrigerating cycle connected to the pipes in order to circulate the evaporator 71, the compressor 75, the condenser 74, the refrigerant storage tank 73, the expansion valve (or capillary tube) 72, and the evaporator 71 again; ; Jacketed transformer chiller using a refrigeration cycle, characterized in that the control unit for controlling the overall chiller.