JPH08338648A - Cooling water supplying system - Google Patents

Abstract

PURPOSE: To enable cooling water to be supplied to a water-cooled heat exchanging part in an important facility even when supplying of the cooling water from a source of cooling water is stopped due to an emergency such as an earthquake or the like. CONSTITUTION: This system is comprised of a cooling water system for supplying cooling water flowed from a source of cooling water 9 to a heat exchanging part, a freezing device 16 for obtaining cooling water containing ice from either the cooling water facility or the cooling water system and from the cooling water, and a cold water accumulating tank 19 for storing the cooling water containing ice. Then, when the cooling water flowed from the source of cooling water 9 is stopped, the cooling water containing ice stored in the cold water accumulating tank 19 can be supplied to the cooling water system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling water supply system for equipment having a water-cooled heat exchange section, and particularly when the supply of cooling water from a cooling water source is stopped in an emergency such as an earthquake. Cooling water supply system that can continue cooling.

[0002]

2. Description of the Related Art In factories, large buildings, and the like, there are cases in which a private power generation facility such as a diesel engine, which is a combination of a rotary prime mover and a power generator, or a fuel cell power generator is installed. In general, a water-cooled heat exchange section is provided for cooling the rotary motor and the fuel cell power generator in terms of heat exchange efficiency. Cooling water is supplied to the heat exchange section by a cooling water system, and the cooling water from the source water or middle water is received and stored in a large-capacity cooling water source, such as a groundwater tank in the building, from which it is stored. Pumped up and supplied to the cooling water system.

In the room where the emergency equipment of the building is installed, air conditioning equipment for cooling the heat generated from the emergency equipment is provided. As such,
For example, air-conditioning equipment in a building management center where emergency equipment such as disaster prevention equipment is installed, air-conditioning equipment in an extra-high voltage substation room in which an extra-high voltage substation equipment is installed, and equipment that supplies power to emergency equipment There are air conditioning equipment in the installed emergency power distribution room, air conditioning equipment in the private power generation room where the private power generation equipment is installed, and air conditioning equipment in the emergency equipment room where other emergency equipment is installed. Even in these air conditioning facilities, a water-cooled heat exchange section is often provided.

[0004]

However, in the event of an emergency such as an earthquake, the supply of cooling water from the water supply or the middle water supply may be stopped, and even in the building, it is generally installed far from the equipment. The cooling water supply from the cooling water source does not always continue. When the supply of the cooling water is stopped in this way, the water temperature of the cooling water system gradually rises, and after a short time, the equipment that requires it must be stopped. If this important equipment stops, the damage may be further expanded and it may not be possible to recover.Therefore, it is strongly requested to continue the operation of the important equipment at least while ensuring a sufficient time margin for the initial response to an emergency. ing. Therefore, it is an object of the present invention to provide a cooling water supply system capable of continuing the supply of cooling water to important equipment for some time even when such an emergency occurs.

[0005]

That is, the present invention is a cooling water supply system for equipment having a water-cooled heat exchange section. This system is a cooling water system for supplying cooling water from a cooling water source to the heat exchange section, a refrigeration system for obtaining ice-containing cooling water from the cooling water source or the cooling water fractionated from the cooling water system, and the obtained ice. And a cold water storage tank for storing the contained cooling water. When the supply of the cooling water from the cooling water source is stopped, the ice-containing cooling water stored in the cold storage water tank can be supplied to the cooling water system. In a preferred embodiment of the above system, the refrigeration system is configured to operate at midnight power, thereby reducing system maintenance costs.

In another preferred embodiment of the above system, the equipment having a water-cooled heat exchange section is a rotating prime mover or a fuel cell power generator. In still another preferred embodiment of the above system, the equipment having a water-cooled heat exchange section is an air conditioning equipment provided in a room in which emergency equipment is installed. In another preferred embodiment of the above system, a plurality of cold storage water tanks are connected in parallel, and an opening / closing valve is provided on each of the inlet side and the outlet side thereof. In yet another preferred embodiment of the above system,
It is configured so that the ice-containing cooling water from the cold storage water tank can be supplied to general air conditioning equipment.

[0007]

According to the cooling water supply system of the present invention, when the supply of cooling water from the cooling water source is stopped due to an earthquake or the like,
Since the ice-containing cooling water stored in advance in the cold water storage tank can be supplied to the cooling water system, even if such an emergency occurs, the cooling water will be supplied to important equipment for some time. Can continue. Therefore, it is possible to prevent the spread of damage effectively by giving a time margin for the initial response to the emergency situation.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.
FIG. 1 is an example in which the cooling water supply system of the present invention is applied to cooling a rotary prime mover in a private power generation facility. A generator 2 is driven by a rotary prime mover 1 such as a diesel engine, and the rotary prime mover 1 has a water-cooled heat exchange section 3. Further, a pump 4 is directly connected to the rotating prime mover 1, and the pump 4
By the rotation of the cooling water, the cooling water is supplied to the heat exchange section 3 from the cooling water tank 5 installed in the cooling water system through the pipe 6. The cooling water discharged from the heat exchange section 3 is supplied to the cooling water tank 5 through the pipe 7.
Will be returned to. Reference numeral 8 is a manual or automatic on-off valve.

A cooling water source 9 composed of a large-capacity water tank installed in the basement of the building or the like supplies the cooling water at the time of starting the rotating prime mover 1 through a pump 10 and a small water tank 11. . Further, the cooling water is supplied from the cooling water source 9 to the cooling water tank 5 by the pump 12. Excess cooling water is discharged from the cooling water tank 5 to the outside through a drainage pipe (not shown), but if necessary, a cooling facility 13 such as a cooling tower is provided for cooling the cooling water, and a part of the cooling water is pumped by the pump 14. It is circulated and cooled. Cooling water is introduced from the cooling water source 9 into the refrigerating device 16 by the pump 15. The refrigeration system 16 is driven by an electric motor 17 which is preferably operated at midnight to produce ice-containing cooling water. This ice-containing cooling water is in a state in which a large amount of ice is contained in water and is flowable, such as one in which the ice and water are sherbet-like, or one in which a large number of small ice blocks exist in the water. is there.

The ice-containing cooling water from the refrigerating unit 16 is supplied to the pipe 1
It is discharged by 8 and stored in the cold storage water tank 19. In this example, two cold water storage tanks 19a and 19b are connected in parallel,
The on-off valves 20 and 2 are provided on the inlet side and the outlet side, respectively.
1 is provided. By switching between the opening / closing valves 20 and 21, it is possible to select the storage order and the discharge order of the ice-containing cooling water from the refrigerating apparatus 16, or the simultaneous storage and discharge of the both. Further, the number of cold storage water tanks 19 is not limited to two, and more than one may be connected in parallel.
The overall storage capacity of the cold storage water tank 19 is appropriately selected according to the supply flow rate and the supply time required by the cooling water system.

The pipes on the outlet side of the cold storage water tanks 19a and 19b are merged to form a pipe 22, which is further branched into pipes 23 and 24. Piping 23 and pump 25 installed on it
Thus, the ice-containing cooling water from the cold storage water tank 19 is supplied to the cooling water tank 5 in the cooling water system. In addition, pump 25 in the figure
In particular, it is indicated as a double circle as an emergency device to distinguish it from other general pumps. Electric power is supplied to such a pump from an emergency load system 57 described later. When the cold storage water tank 19 is installed at a high place, the ice-containing cooling water is supplied to the cooling water tank 5 by the head pressure.
Can be omitted. The pipe 24 allows the general-purpose air conditioning equipment 26 to be supplied with the ice-containing cooling water from the cold storage water tank 19. Such a general-purpose air conditioner 26 can be used for temporarily reducing the load for general use when the maximum demand power is exceeded during the daytime. As shown in the figure, the cooling water can be supplied to the general-purpose air conditioning equipment 26 from the cooling water tank 5 by the pipe 27 and the pump 28.

The electric motor 17 for driving the refrigerating apparatus 16 is connected to the distribution main line 51 via a circuit breaker 52. On the other hand, the power generated by the generator 2 is supplied to the distribution main line 51 via the circuit breaker 53, and is supplied to the general load system 55 and the emergency load system 57 together with the power supplied from the power receiving system 50 via the circuit breaker 59. Supplied. General load system 5
5 is a circuit breaker 54, and the emergency load system 57 is connected to the distribution main line 51 via a circuit breaker 56. The distribution main line 51 is provided with a branch switch 58, and when the power supply from the power receiving system 50 is stopped, the branch switch 58 is opened to limit privately generated power to the emergency load system 57. .

FIG. 2 shows an example in which the cooling water supply system of the present invention is applied to a fuel cell power generator in place of the rotary prime mover 1 shown in FIG. 1. Since the common parts are the same as in FIG. It is omitted in the figure. The fuel cell power generator 30 has a water-cooled heat exchange section 31, and the cooling water tank 5
The cooling water is supplied from the pipe 6 and the pump 32. Further, the cooling water discharged from the heat exchange section 31 is pipe 7
Is returned to the cooling water tank 5. By switching the opening / closing valve 8, the pipe 33 can be returned to the cooling water / water tank 5 via the heat load equipment 34 such as hot water supply equipment and cooling / heating equipment. The DC output of the fuel cell power generator 30 is converted into AC by the orthogonal converter 35, and the output is supplied to the distribution main line 51 via the circuit breaker 53.

Next, the operation of FIGS. 1 and 2 will be described. In FIG. 1, the pump 10 is normally activated prior to the activation of the rotary prime mover 1, and cooling water is supplied from the cooling water source 9 to the heat exchange unit 3. Then, when the rotary engine 1 is started and reaches a predetermined rotation speed, the supply of cooling water by the directly connected pump 4 is switched. The cooling water is supplied from the cooling water tank 5 to the heat exchange section 3 via the pipe 6 and the pump 4, and the discharged cooling water is returned to the cooling water tank 5 again by the pipe 7. Cooling water tank 5
The cooling water is supplied from the cooling water source 9 by the pump 12, and a part of the cooling water in the cooling water tank 5 is appropriately discharged and cooled by the heat exchange device 13 such as a cooling tower. On the other hand, although the refrigerating device 16 can be operated during the daytime, it is preferably operated at midnight power, and the ice-containing cooling water is made from the cooling water introduced from the cooling water source 9 and stored in the cold storage water tank 19.

In the above state, when an emergency situation such as an earthquake occurs and the supply of cooling water from the cooling water source 9 is stopped, the water temperature in the cooling water tank gradually rises. When the water temperature exceeds a predetermined temperature, it is detected by a temperature detector or the like and automatically, or the detected value is monitored and manually operated to start the pump 25 and store it in the cold water storage tank 19. The cooling water containing ice is supplied to the cooling water tank 5 in the cooling water system. Since this ice-containing cooling water has a large latent heat of melting ice contained therein, the cooling effect thereof is extremely large even with a small amount. In such an emergency,
If the power supply from the power receiving system 50 is stopped,
As described above, the branch switch 58 is opened to limit the privately generated power to the emergency load system 57, so that the emergency load system has a surplus supply capacity and the operation of the emergency equipment such as the pump 25 is continued. Preferably. Note that such power limitation can also be automatically performed by a power supply stop signal from the power receiving system 50.

Next, in FIG. 2, in normal times, the cooling water is supplied to the heat exchange section 31 of the fuel cell power generator 30 from the cooling water tank 5 by the pipe 6 and the pump 32, and further discharged from the heat exchange section 31. The cooling water is returned to the cooling water tank 5 through the pipe 7 or the heat load equipment 34. Since the operation when the supply of the cooling water from the cooling water source 9 is stopped in an emergency or the like is the same as that in the case of FIG. 1, the description thereof will be omitted.

FIG. 3 shows an example in which the cooling water supply system of the present invention is applied to the cooling of an air conditioner for cooling the room in which emergency equipment is installed. In the figure, as such an air conditioning equipment, for example, an air conditioning equipment 41 of a building management center in which emergency equipment such as disaster prevention equipment is installed, an air conditioning of an extra high voltage substation room in which an extra high voltage substation equipment is installed. Equipment 42,
Air conditioning equipment 43 in the emergency power distribution room where equipment for supplying electricity to the emergency equipment is installed, air conditioning equipment 44 in the private power generation room where the private power generation equipment is installed, and other emergency equipment Although the air conditioning equipment 45 of the equipment room is shown, the invention is not limited thereto. Note that these facilities and the like are supplied with power from the emergency load system 57 described above. For the water-cooled heat exchange part in air conditioning equipment,
Cooling water is supplied from the cooling water tank 5 to each air conditioning equipment in the figure by a common pipe 8a and a pump 40, and the cooling water discharged from the cooling water tank 5 is directly or by a heat exchanging device 13 such as a cooling tower by switching the opening / closing valve 8. It is returned to the cooling water tank 5 via.

On the other hand, the cooling water is introduced from the cooling water source 9 into the refrigerating device 16 by the pump 15, and the refrigerating device 16 is driven by the electric motor 17 operated at midnight to produce ice-containing cooling water. The ice-containing cooling water from the freezing device 16 is discharged from the pipe 18 and stored in the cold storage water tank 19. Also in this example, two cold storage water tanks 19a and 19b are connected in parallel, and opening / closing valves 20 and 21 are provided on the inlet side and the outlet side thereof, respectively. The pipes on the outlet side of the cold water storage tanks 19a and 19b join together to form a pipe 22, which is further branched into pipes 23 and 24. The ice-containing cooling water from the cold storage water tank 19 is supplied to the cooling water tank 5 in the cooling water system by the pipe 23 and the pump 25 installed therein. The pipe 24 allows the general-purpose air conditioning equipment 26 to be supplied with the ice-containing cooling water from the cold storage water tank 19. As shown in the drawing, the cooling water can be supplied to the general-purpose air conditioning equipment 26 by the pipe 27 from the cooling water tank 5. In this example, as in the example of FIG. 1, an emergency such as an earthquake occurs and the cooling water source 9
When the supply of the cooling water from is stopped, the pump 25 can be activated to supply the ice-containing cooling water stored in the cold storage water tank 19 to the cooling water tank 5.

[0019]

According to the cooling water supply system of the present invention configured as described above, when the supply of the cooling water from the cooling water source is stopped due to an earthquake or the like, the ice-containing cooling water stored in advance in the cold storage water tank. Since the cooling water can be supplied to the cooling water system, the cooling water can be continuously supplied to the important equipment for some time even when such an emergency occurs. Therefore, it is possible to prevent the spread of damage effectively by giving a time margin for the initial response to the emergency situation.

[Brief description of drawings]

FIG. 1 is a flow sheet showing an example in which a cooling water supply system of the present invention is applied to cooling a rotary motor.

FIG. 2 is a flow sheet showing an example in which the cooling water supply system of the present invention is applied to cooling a fuel cell power generator.

FIG. 3 is a flow sheet showing an example in which the cooling water supply system of the present invention is applied to cooling an air conditioner installed in a room where emergency equipment is installed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating prime mover 2 generator 3 heat exchange part 4 pump 5 cooling water tank 6 piping 7 piping 8 opening / closing valve 9 cooling water source 10 pump 11 small water tank 12 pump 13 heat exchange device 14 pump 15 pump 16 refrigeration device 17 electric motor 18 piping 19 cold storage water tank 19a Cold storage water tank 19b Cold storage water tank 20 Open / close valve 21 Open / close valve 22 Piping 23 Piping 24 Piping 25 Pump 26 General air conditioning equipment 27 Piping 28 Pump 30 Fuel cell power generator 31 Heat exchange part 32 Pump 33 Piping 34 Heat load equipment 35 Orthogonal conversion Equipment 40 Pump 41 Air-conditioning equipment for building management center 42 Air-conditioning equipment for extra-high voltage substation room 43 Air-conditioning equipment for emergency power distribution room 44 Air-conditioning equipment for private power generation room 45 Air-conditioning equipment for emergency equipment room 50 Power receiving system 51 Distribution trunk line 52 Blocking Device 53 Circuit breaker 54 Circuit breaker 55 General load system 56 Circuit breaker Circuit breaker 57 Emergency load system 58 Branch switch 59 Circuit breaker

Claims (6)

[Claims] 1. A cooling water supply system for a facility having a water-cooled heat exchange section, wherein a cooling water system for supplying cooling water from a cooling water source 9 to the heat exchange section, and the cooling water source or the cooling water system. A refrigerating device 16 for obtaining ice-containing cooling water from the collected cooling water, and a cold storage water tank 19 for storing the obtained ice-containing cooling water are provided, and when the supply of the cooling water from the cooling water source 9 is stopped, A cooling water supply system characterized in that it is configured so that the ice-containing cooling water stored in the cold storage water tank 19 can be supplied to the cooling water system. 2. The cooling water supply system according to claim 1, wherein the refrigerating device 16 is configured to be operated by electric power at midnight. 3. The cooling water supply system according to claim 1 or 2, wherein the equipment having a water-cooled heat exchange section is the rotary prime mover 1 or the fuel cell power generator 30. 4. The cooling water supply system according to claim 1, wherein the equipment having a water-cooled heat exchange section is an air conditioning equipment provided in a room in which emergency equipment is installed. 5. A plurality of cold storage water tanks 19 are connected in parallel,
The cooling water supply system according to any one of claims 1 to 3, wherein on-off valves 20 and 21 are provided on the inlet side and the outlet side, respectively. 6. The cooling water supply system according to any one of claims 1 to 4, wherein the ice-containing cooling water from the cold storage water tank 19 can be supplied also to the general-purpose air conditioning equipment 26.