JPS6029301Y2 - Power cable cooling system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a forced cooling device for a power cable using a heat storage tank and a refrigerator.

Conventional technology In FIG. 1, 10 is a cable.

12 is an external pipe line, 14 is a pump, and 16 is a heat exchanger, and these constitute a circulation circuit 18 for the refrigerant 11 of the cable 10.

20 seems to be accumulating heat.

The inside is provided with hot water 2 by a partition wall 24 having small holes 22.
It is divided into 6 and 28 cold water baths.

30 is a refrigerator, and a cooling tower 32 is attached to it.

The cold water 29 in the cold water tank 28 of the heat storage tank 20 is sent to the heat exchanger 16 to cool the refrigerant 11, and returns to the hot water tank 26 as hot water 27.

The hot water 27 is cooled by a refrigerator 30 and returned to the cold water tank 28.

The heat taken from the hot water 27 by the refrigerator 30 is released into the air from the cooling tower 32.

When the load current of the cable 10 is small and when the outside temperature is low such as in winter or at night, the temperature of the hot water 26 in the heat storage tank 20 does not rise much because the cooling load on the cable is small.

Therefore, it is uneconomical to operate the refrigerator 30 to cool the hot water 27 even at such times.

In the present invention, in the above case, the refrigerator 30 is not operated, and only the cooling tower 32 attached to it is operated to cool the hot water 27, thereby preventing the refrigerator from operating uneconomically. This is how it was done.

Example (Fig. 2) Direct connection between the inlet 321 of the closed cooling tower 32, the hot water tank 26 of the heat storage tank 20, and the pipe line 34 (without passing through the refrigerator 30)
Connect to.

Further, the outlet 322 of the closed cooling tower 32 and the cold water tank 28 of the heat storage tank 20 are directly connected by a pipe 36.

Valves 3B, 40, 42, and 44 are provided.

The reason why the cooling tower 32 is of a closed type is to prevent the water in the heat storage tank 20 from being contaminated.

Others are the same as in the conventional case.

During high loads on the operating cable 10, the valves 38, 40 are closed and the valves 4
2.44 is opened, and the hot water 27 in the heat storage tank 20 is cooled by the refrigerator 30 as before.

When the load on the cable is low or when the outside temperature drops such as in winter or at night, valves 42 and 44 are closed and valves 38 and 40 are opened, and the operation of the refrigerator 30 is stopped and only the cooling tower is operated. .

Then, the hot water 27 in the heat storage tank 20 is cooled by the cooling tower 32 and returned to the cold water tank 28.

The valves 42, 44 and 38, 40 can be switched, for example, by detecting the temperature of the hot water 27 in the heat storage tank 20.

Effects of the invention When the load current of the cable decreases or the outside temperature drops such as in winter or at night, only the cooling tower 32 is operated to cool the hot water 27 in the heat storage tank 20, which is uneconomical for the refrigerator 30. You can prevent the driver from driving in a dangerous manner.

Moreover, even if this is done, the amount of heat to be removed from the hot water 27 is small as described above, so there is no problem in cooling the cable.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the prior art, and FIG. 2 is an explanatory diagram of the embodiment of the present invention. 10: Cable, 11: Refrigerant, 18: Circulation circuit, 20:
Heat storage, 30: Freezer, 32: Cooling tower.

Claims (1)

[Claims for Utility Model Registration] Circulation circuit 18 for refrigerant 11 of cable 10 and circulation circuit 1
A heat storage tank 20 capable of cooling the refrigerant 11 circulating in the heat storage tank 8 with cold water 29 stored inside the heat storage tank 20, a refrigerator 30 for cooling the water stored in the heat storage tank 20, and a refrigerator 30 attached to the refrigerator 30. In the cooling system for an electric power cable, the cooling tower 32 is equipped with a closed type cooling tower 32 for storing heat.
A cooling device for an electric power cable, characterized in that the cooling tower 32 can be selectively connected to the refrigerator 30 and the heat storage tank 20.