JPS59175322A - Cooler of power cable line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for a power cable line that utilizes heat and ξ-waves.

FIG. 1 shows a cross section P+ of a conventional cooling device, and FIG. 2 is a sectional view taken along the [-11] arrow in FIG. In the figure, l is the cable conduit body, 2 is the power cable, 3 is the cable lead-in conduit, 4 is the outward cooling conduit for indirect cooling of the conduit, 5 is the outward cooling conduit, and 386 is the refrigerant. Conduit lead-in conduit, 7
8 is a cooling equipment such as a refrigerator. 1st, 3rd
The figure is a front view of the pipe direct cooling device, and 6 is a refrigerant for pipe direct cooling.

Conventionally, as means for cooling the pipe section, an indirect pipe cooling method shown in FIG. 2 and a pipe direct cooling method shown in FIG. 3 are commonly used. In the pipe indirect cooling method, as shown in Figure 2, a refrigerant is passed through the cable pipe main body 1, and is used for pipe construction materials such as conocrete, glass fiber reinforced plastic pipes, electric cables 2, and cables for refrigerant guides V4 and 5. In order to indirectly cool the power cable 2 through the air between the refrigerant pipes 3 and 3A, a pipe line 3 between the power cable 2 and the refrigerant pipes 4 and 5 is used.
, 3A, the cooling efficiency is not good.

In fact, cooling equipment 8 such as refrigerant circulation equipment, refrigerators, and cooling towers must be installed nearby.

On the other hand, in the conduit direct cooling system, in addition to the problem of installing the cooling equipment 8, there is also an increased economic burden of having to construct a conduit that allows the refrigerant to circulate.

Particularly in urban areas where forced cooling lines are required, it is becoming difficult to secure land for cooling stations, so the distance between cooling stations is often 5 km or more. Therefore, if most of the cable line is tunnel and part is conduit, it is not practical to install a cooling base to cool the conduit part3.An alternative option is heat This is a cooling method using ξ-waves, but the problem with this method is how to dissipate heat. Possible ways to do this include installing a condensing heat exchanger at the end of the conduit, or burying a condensing heat exchanger in the soil away from the cable conduit and dissipating it into the soil. In reality, this would be difficult due to space constraints and site constraints.

The present invention was made in view of the above-mentioned situation, and an object of the present invention is to provide a cooling device for an electric power cable line, which can efficiently cool electric power cables and increase the number of power transmission customers.

The cooling device for an electric power cable line of the present invention cools a hot spot part in a conduit or a tunnel of an electric cable main line through a heat wave. The amount of heat absorbed on the evaporation side of the tube is transferred to the circulating refrigerant for indirect or direct cooling in the trough installed in the tunnel.
? The structure is such that heat is radiated through the condensing side of the tube.

Hereinafter, the cooling device for a power cable line according to the present invention will be described with reference to embodiments and FIGS. 4 to 6, in which the same parts as in the conventional art are denoted by the same reference numerals. FIG. 4 is a detailed cross-sectional view of a main part, FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4, and FIG. 6 is a cross-sectional view of the trough in FIG. 4. In the figure, if there is a conduit installed in a part of the trough indirect cooling line laid in the tunnel, the cable 2 in the trough 11 and the cooling polyethylene joint are connected to the trough indirect cooling refrigerant conduit 9 made of bolybdenum as shown in Fig. 5. As shown in FIG. In the cable conduit main body 1, a heat pipe is attached so that a heat/ξ-wave evaporating section 10 is located close to the power cable 2 side, and a heat/-wave condensing section is located close to the refrigerant conduit 9 for indirect cooling of the trough. Heat ξ
The water and other refrigerants in the tube absorb heat and evaporate along the length direction of the power cable 2 in the heat pipe evaporation section 10, and the evaporated refrigerant is evaporated along the trough indirect cooling refrigerant conduit 9 in the heat pipe condensation section 10A. Dissipates heat and condenses. The condensed refrigerant will repeatedly evaporate due to the absorption of cable heat generation. That is, by simply creating a thermal opening/closing path using the heat pipe, the conduit itself performs heat exchange between the electric cable 2 and the refrigerant conduit 9 for indirect cooling of the trough.

In this way, the power cable line cooling device of this embodiment is
There is no need for conventional cooling equipment such as a refrigerator, so there is no need for maintenance or inspection, and the power cable can be efficiently cooled and the power transmission capacity can be increased with a separate structure. In fact, if there is enough empty pipe to pass the cooling water pipe from the tunnel, the allowable current for the power pull in the pipe may be secured without using a heat pump. However, in general VC, the thermal K M l in the conduit section is higher than that in the tunnel section, so it is necessary to pass a larger number of cooling water conduits through the conduit than in the tunnel section. Even heat pipes with a diameter of t/3 to 115 can transport more heat than the cooling water conduit, making it extremely economical as the space occupied by the cooling water conduit in the cable conduit can be reduced. It is.

If there is no suitable empty pipe line for installing the heat pipe, install the trough indirect cooling refrigerant pipe 9 as shown in Figure 7.
Alternatively, the power cable 2 may be introduced into the same conduit as the power cable 2 as shown in FIG. In the above embodiment, a case was explained in which the conduit for indirect cooling of the trough in the tunnel was used for heat dissipation of the heat pipe, but it is of course possible to use return water for indirect cooling of the trough or refrigerant for direct liquid cooling in the tunnel. n1 ability.

In addition to the case where there is a conduit in a part of the tunnel, the above embodiment is also effective when there is a cable hot spot in the tunnel (the connection part i′i becomes a hot spot). . That is, if a heat pipe is provided along with the connecting portion that becomes the hot spot, cooling can be performed using the same principle as in the above embodiment.

As described above, the power cable line cooling device of the present invention has a simple structure, does not require maintenance and inspection, and has the effect of cooling power cables economically and efficiently and increasing power transmission capacity. be.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the cold power 1 line 1 negative of a conventional cable line,
Figure 2 is a plan view of the n-, TI arrow in Figure 1, and a cross-sectional view of the same part as Figure 2 in the state of pipe surface cooling.
The figure is a vertical cross-sectional view of a wall of an embodiment of the cooling device for electric cable lines of the present invention, and FIG. 5 is a cross-sectional view of a part of the ■-V arrow in FIG.
6 is a sectional view of the trough shown in FIG. 4, and FIGS. 7 and 8 are explanatory views of other mounting structures for the heat/eve condensing section and the heat pipe evaporation section shown in FIG. 6, respectively. 1. Cable conduit main body, 2. Electric cable, 3.
...Cable lead-in conduit, 91-rough indirect cooling refrigerant conduit, IO...Heat/ξ Eve wilting section, 10A...Heat pipe condensing section. ! 1 Figure 2 Figure 3 Hayabusa 4I2 Luci An S Illustration 6 Figure Sin 7 Figure 8

Claims (1)

[Claims] 1. In a device that cools the conduit section of the electric cable line or the hot spot section in the tunnel through the heat/ξ-wave, the amount of heat absorbed by the heat/ξ-wave evaporation section of the heat pipe is transferred to the trough of the fabric membrane inside the tunnel. A cooling device for an electric cable line, characterized in that it is configured to radiate heat to a circulating refrigerant for indirect or direct cooling via a heat/ξ Eve condensing section.