KR100660188B1 - Cooling system for power cable tunnel - Google Patents

Abstract

The present invention relates to a plug-in power-hole cooling system for reducing the power transmission capacity decrease due to excessive increase in temperature inside the power bulb, in the present invention, the cooling system, the power-hole cooling and the recovered high-temperature cooling fluid at low temperature cooling A refrigerator for converting to a fluid; An electrothermal cooling mechanism for cooling the inside of the electric power tool by the low temperature cooling fluid flowing out of the freezer; A circulation pump installed upstream of the electrothermal cooling mechanism downstream of the refrigerator to pressurize the low pressure cooling fluid flowing out of the refrigerator; And a piping for supplying the low temperature cooling fluid from the freezer to the heat transfer cooling mechanism and a recovery tube for recovering the high temperature cooling fluid from the heat transfer cooling mechanism to the freezer.

Electric bulb, freezer, fan coil unit, circulation pump, electric heat cooling device

Description

Cooling system for power cable tunnel

1 is a schematic view for explaining a conventional power supply cooling system,

2 is a view for schematically explaining a plug-in power bulb cooling system according to the present invention,

3 is a view schematically showing the configuration of a fan coil unit which is an electrothermal cooling mechanism constituting the present invention.

<Explanation of symbols for the main parts of the drawings>

1: power bulb 2: underground

3: suction port 4: suction pipe

5: blower 6: outlet

7: blower 8: blower
20: freezer

30: circulating pump 41: cold water supply piping

42: recovery pipe 50: electric heat cooling mechanism

510: heat exchanger 520: blower

FIELD OF THE INVENTION The present invention relates to a pluggable power bulb cooling system, and more particularly, to a cooling system for reducing power transmission capacity reduction due to excessive temperature increase inside a power bulb.

The power line to which high voltage power is carried is limited by the temperature, the maximum power transport amount, the power line is heated by its resistance and the temperature rises. As a result, the amount of power that can be transported to a given power line is reduced as the temperature rises. Therefore, in order to transport power smoothly, heat generated from the power line must be discharged to the outside, and in general, the power is discharged to the outside through the air inside the power port where the power line is located. In particular, in the plug-in power bulbs closer to the earth's surface than in the tunnel, the decrease in the transmission amount becomes more serious as the temperature of the outside air increases during the summer.

Therefore, the temperature inside the power bulb is kept below a certain temperature to dissipate heat emitted from the power line into the power bulb, and the temperature inside the elevated power bulb is lowered below a certain temperature by using an appropriate cooling system, thereby achieving smooth power transportation. It is required to lose. In addition, the law stipulates that the temperature inside the electric bulb (defined by the tunnel) is maintained at a temperature of 37 ° C or lower.

1 is a view schematically showing a power-bulb cooling system currently employed, wherein a blower 5 is installed at a predetermined location of a suction port 3 formed at a predetermined portion of the ground 2 leading to the ground surface, and is spaced a predetermined distance apart. In order to install the blower 8 at a predetermined position of the discharge port 6, the blower 5 is provided only at the predetermined position of the intake port 3 for the convenience of operation or to reduce the installation cost. Only the air blower 8 can be provided in a predetermined position.

In fact, the inlet 3 or outlet 6 is designed to function as a doorway for the worker to enter and exit for maintenance, maintenance and inspection of the underground power outlet, and the blower 5 or the blower 8 is installed at a predetermined position. It is arranged to In addition, the blower tube 4 is designed to extend from the inlet 3 to the power outlet 1, and the blower tube 7 is designed to extend from the outlet 6 to the power outlet 1, so that the blower tube 4 and The exhaust pipe 7 allows the worker to move from the ground to the power outlet 1.

In such a conventional power port cooling system, air in the atmosphere is introduced into the inlet port 3 by the operation of the blower 5 installed at a predetermined position of the inlet port 3 and passes through the blower tube 4 into the power outlet 1. The ground air flowed in from here will be raised in temperature by the heat emitted from the power line placed in the power outlet 1, and the air whose temperature is raised will be disposed on the other side of the power outlet 1. It is sucked by the operation of the blower 8 of the discharge port 6 and discharged to the outside via the blower tube 7. Through this process, the hot air inside the electric power tool 1 is discharged to the outside, and as the outside air circulates through the electric power tool inside, the temperature inside the electric power tool 1 can be maintained below a predetermined temperature.

However, the following problems exist in such a power-sphere cooling system.

First, when the air temperature is high, such as summer, the cooling system using the atmosphere is extremely low in operation efficiency, because the outside air itself is hot and humid, so even if a large amount of outside air circulates, the temperature inside the electric bulb is kept below the outside temperature. Because it is difficult to do.

Second, even when the entrance and exit section of the electric bulb is relatively long, the conventional electric bulb cooling system did not work effectively. This is used as an access passage for the worker to move into the electric power outlet 1 by using the blower tube 4 and the exhaust tube 7, which is conventionally employed, so that the smooth circulation of air is difficult when the length of the access passage is long. Because.

Finally, when increasing the circulating flow rate of the air in accordance with the temperature inside the power bulb, the flow of a high wind speed occurs inside the power bulb (1) to hinder the maintenance, maintenance and management activities of the power bulb.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, and operates effectively even when the power bulb section is relatively long, and determines the temperature inside the power bulb without impeding the work of the worker inside the power bulb. It is an object of the present invention to provide a pluggable power supply cooling system that can be maintained in range to achieve smooth power transmission.

In order to achieve the above object, in the present invention, as a cooling system of a predetermined length of the plug-in power bulb is provided with a plurality of power lines to which high-voltage power is transported,

A refrigerator for cooling the electric power tool and converting the recovered high temperature cooling fluid into a low temperature cooling fluid;

An electrothermal cooling mechanism for cooling the inside of the electric power tool by the low temperature cooling fluid flowing out of the freezer;

A circulation pump installed upstream of the electrothermal cooling mechanism downstream of the refrigerator to pressurize the low pressure cooling fluid flowing out of the refrigerator; And,

An open-type electric power source cooling system comprising a pipe for supplying the low temperature cooling fluid from the freezer to the heat transfer cooling mechanism and a recovery tube for recovering the high temperature cooling fluid from the heat transfer cooling mechanism to the freezer.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings showing preferred embodiments.

Figure 2 schematically shows a system of a pluggable power outlet cooling system according to the present invention.

As shown in FIG. 2, the power-ball cooling system according to the present invention maintains the temperature inside the plug-in power-bulb section (also called a hot spot) close to the ground of the underground power bulb at 37 ° C. for smooth power transmission and operation. It is to improve the environment.

In the cooling system of the present invention, a small refrigerator (20) is installed at the bottom of the entrance (3) side that enters and exits from the ground to the inside of the power outlet, and the cold water supply pipe (41) extending from the refrigerator (20) into the power outlet. The cold water supply pipe (41) is arranged in series or in parallel with one or more appropriate numbers of electrothermal cooling devices (50) such as a fan coil unit (FCU) at appropriate intervals, the electrothermal cooling device (50) The passed medium is configured to return to the freezer 20 again through the recovery pipe 42.

On the other hand, the intake separation pipe 11 which intakes air to the electric power outlet in which such a cooling system is installed and also performs a ventilation opening so that an operator can enter and exit through the ground 2 in correspondence with the installation portion of the refrigerator 20 is opened and closed. 3), the exhaust pipe 16 is installed at the entrance 3 on the other side corresponding to the intake separation pipe 11. And at a position spaced a predetermined distance away from the entrance (3), an exhaust pipe (7) may be installed to discharge the air inside the power outlet (1) to the ground, and an exhaust fan (8) may also be installed at this discharge portion.

The intake separation pipe 11 and the exhaust pipe 16 are configured in the form of a duct on both side walls of the air inlet.

In the present invention, the refrigerator 20 and the electrothermal cooling mechanism 50 are disposed inside the power outlet 1 in the basement, and the cold water of the low temperature generated by the freezer 20 passes through the cold power pipe 41. 1) is transmitted to the plurality of electrothermal cooling mechanisms 50 installed therein through the work of the circulation pump 30. Cold water delivered to the electrothermal cooling mechanism (50) blows cold air into the underground power outlet (1) and then the cold water is warmed again to return to the freezer (20) through the recovery pipe (42), repeating this circulation process This is to maintain the temperature of the underground power outlet at a low temperature.

In the underground power bulb cooling system, since a small refrigerator (less than 50RT) is installed as a structure that can be installed in a section of the detachable power bulb 1, the structure is simple because there is no need to install a cooling tower, which is an outdoor unit on the ground.

The refrigerator 10 constituting the cooling system of the present invention is preferably a water-absorbing freezer as a small freezer, and an air-cooled freezer is generally used, but a water-cooled freezer can also be used.

In the present invention, the refrigerator (20) has an inlet (23) for cooling the power outlet (1) and the recovered high-temperature cooling fluid flows in, and an outlet for the cooling fluid cooled in the refrigerator (20) to flow into the supply pipe (41). 24 is formed, the atmospheric inlet 21 where the atmospheric air at room temperature flows into one end of the refrigerator 20 and the atmospheric air absorb the heat of the high-temperature cooling fluid inside the refrigerator 20 to the atmosphere. It is configured to have an outflowing air outlet 22.

In addition, in the present invention, the heat transfer cooling mechanism 50 is installed in one or more in series, of course, can also be installed in parallel, the heat transfer cooling mechanism 50 as an example, as shown in Figure 3, a fan coil unit It can be configured as a (FCU; Fan Coil Unit), a heat exchanger 510 having a heat transfer tube inside which a low-temperature cooling fluid flows and the air inside the power outlet through the filter 550 to heat the heat exchanger (510) And the air cooled by heat exchange with the low temperature cooling fluid therein includes a blower 520 for discharging again to the outside, and the case 500 constituting the electrothermal cooling mechanism 50 is used as a power outlet (1). Inlet 530 for introducing air therein and a discharge port 540 for discharging air whose temperature is lowered through the heat transfer process to the inside of the power port are formed in the case 500, and the air inlet 530 and the discharge port ( Heat transfer efficiency by blower 520 installed between 540 And configured to be maximized.

The electrothermal cooling mechanism 50 may be configured in other forms of supplying low-temperature air to the power outlet (1).

Hereinafter, the operation relationship of the plug-in power bulb cooling system of the present invention having the configuration as described above.

First, the circulation of the cooling fluid will be described. The low temperature cooling fluid of the refrigerant circulation pipe of the refrigerator 20 is supplied to the heat transfer cooling mechanism 50 of the electric power tool 1 through the supply pipe 41, and the heat transfer cooling is performed. The high temperature cooling fluid, which has been heat-exchanged by the apparatus 50 and warmed, is recovered to the freezer 20 via the recovery pipe 42 again. Here, the high temperature cooling fluid flows into the circulating refrigerant cooling device and is reduced to the low temperature cooling fluid and flows out. The low temperature cooling fluid flowing out of the freezer 20 is pressurized by the circulation pump 30 to supply the supply pipe 41. It is supplied to the electrothermal cooling mechanism 50 in the power sphere through.

As such, the cooling fluid having a lower pressure through circulation to the supply pipe 41 and the heat transfer cooling mechanism 50 disposed inside the power outlet is pressurized by the circulation pump 30 disposed at the outlet side of the refrigerator 20. It is supplied to the electrothermal cooling mechanism (50).

On the other hand, in order to prepare for leakage and evaporation of the cooling fluid circulated in this way, the replenishment water container can be installed in a suitable place, the fluid supply port adjacent to the circulation pump 30 for supplying and discharging the fluid to the refrigerator 20 And an outlet.

Next, the heat transfer process in the refrigerator 20, which is a circulating refrigerant cooling device, will be described below.

The high temperature cooling fluid recovered from the electric power outlet 1 flows into the inlet port 23 connected to the inlet port of the refrigerator 20, and the atmospheric air of the ground temperature flows into the air inlet port 21 connected to one end of the refrigerator unit 20. And the high temperature air recovered from the atmosphere and the recovered high temperature air are converted into a low temperature cooling fluid through mutual heat transfer in the cold synchronizing unit 20, and the refrigerant supply pipe 41 from the freezer 20 through the outlet 24. And the warmed air flows out through the air outlet 22.

At this time, the low-temperature cooling fluid is pressurized by the freezer 20, the circulation pump 30 is disposed downstream of the refrigerant outlet side of the freezer 20, connected to the freezer 20, the low temperature cooling flow from the freezer 20 Pressurized fluid is supplied to the supply pipe 41 and the heat transfer cooling mechanism (50).

Next, in the electrothermal cooling mechanism 50, the fan coil unit shown in one embodiment will be described as an example. The inside of the power outlet 1 is provided through the inlet 530 of the case 500 by the operation of the blower 520. The high temperature air is sucked through the filter 550, and since the cold water of the low temperature supplied from the freezer 20 through the supply pipe 41 circulates inside the heat exchanger 510, the power port 1 through heat exchange thereof. Absorbs heat from the high temperature air inside the) and the cooled air is discharged into the power outlet again through the outlet 540 to maintain the inside of the power outlet at a constant temperature.

At this time, the cold water inside the heat exchanger 510 is heated to return to the freezer 20 through the recovery pipe 42. As described above, the electrothermal cooling mechanism 50 uses an air blower 520 to suck outside air into the case to exchange heat with cold cold water circulating inside the heat exchanger 510, thereby cooling the cooled air into the power outlet 1. By discharging to the heat transfer efficiency can be maximized.

As a result, the heat discharged from the power line inside the power port 1 in which the high-voltage power line is installed is cooled by a cooling system to maintain the air temperature at a constant temperature even in the summer, thereby reducing the reduction in power transmission capacity due to excessive temperature increase in the power port. have.

Therefore, according to the mounted power bulb cooling system of the present invention as described above, the following effects are obtained.

First, even when the air temperature is high, such as summer, it is very effective to maintain the temperature inside the power bulb below the outside temperature, it is possible to prevent a decrease in power transmission capacity due to the increase in the temperature inside the power bulb.

Second, even when the entrance and exit section of the power bulb is relatively long, the inside of the power bulb can be effectively cooled to maintain below a predetermined temperature.

Finally, the maintenance, maintenance and management activities of the workers in the power cord should be smoothly performed.

Although the present invention has been described above in connection with the preferred embodiments, those skilled in the art may change the present invention in various forms without departing from the spirit of the appended claims, all of which belong to the scope of the present invention. .

Claims (5)

It is a cooling system of a predetermined length of an electric power outlet of a predetermined length in which a plurality of electric power lines carrying high voltage electric power are installed, A refrigerator (20) installed inside the power outlet (1) to cool the power outlet (1) and convert the recovered high temperature cooling fluid into a low temperature cooling fluid; An electrothermal cooling mechanism (50) for cooling the inside of the electric power tool (1) by a low temperature cooling fluid flowing out of the refrigerator (20); A circulation pump (30) installed between the downstream of the refrigerator (20) and the upstream of the heat transfer cooling mechanism (50) to pressurize the low pressure cooling fluid flowing out of the refrigerator (20); And, A blower (8) installed on the other side of the power outlet (1) in which the refrigerator (20) is installed; Pipe 41 for supplying the low temperature cooling fluid from the refrigerator 20 to the cooling heat transfer mechanism 50 and a recovery pipe 42 for recovering the high temperature cooling fluid from the heat transfer cooling mechanism 50 to the freezer. It is made with The electrothermal cooling mechanism (50) is a blower (520) for introducing high temperature air inside the power outlet (1) through the inlet of the case, the high temperature air sucked in and the low temperature cooling supplied from the freezer (20) And a fan coil unit having a heat exchanger (510) for heat exchange of the fluid. The system of claim 1, wherein the refrigerator (20) is an air-cooled refrigerator (20) having a cooling capacity of 50 RT or less. delete delete The system of claim 1, wherein the plurality of electrothermal cooling mechanisms (50) are arranged in series or in parallel.

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