JPH11183058A - High efficiency type cooling tower and cooling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the heat-exchange efficiency of cooling water by a method wherein setting of high voltage electric field or heat-exchange with a refrigerant, such as ice and dry ice, is carried out. SOLUTION: Promotion of cooling of cooling water is effected by setting of a high voltage electric field and heat-exchange with a refrigerant, such as ice and dry ice. The high voltage electric field is easily set in a way that an electrode 1 connected to a high voltage source is arranged in the vicinity of the surface of an object to be cooled and the object to be cooled indirectly or directly. In this case, it is predicted that the humidified air film of the part, making contact with cold air, of an object to be cooled is removed by electron emitted from an electrode 1 and the removed part is heat-exchanged with cold air. Further, it is decided that ice and dry ice are also properly used as a refrigerant used for heat-exchange in terms of a cost performance effect. Further, the heat is stored in a refregerant by inexpensive midnight electric power and the electricity is discharged during daytime when a refregerator is highly loaded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cooling cooling tower cooling water for saving energy of air conditioners and cooling equipment.

[0002]

2. Description of the Related Art A conventional cooling tower lowers the temperature of cooling water by bringing cooling water of equipment into contact with air.
A thermo sensor is installed in the water-cooled cooling tower,
The fan was designed to start and stop at the set temperature to keep the cooling water temperature constant. With such a configuration, in the heat of a hot summer day, the outside air temperature rises and becomes higher than the specified temperature, the cooling water of the cooling tower itself becomes high temperature, loses the cooling effect, the cooling effect of the equipment is reduced by half, and only the electric energy Have been wasted following the increase.

[0003]

FIG. 1 shows the cooling water temperature of a 100-RT screw type refrigerator and the cooling capacity with respect to the fluctuation of the cooling water temperature. When the cooling water outlet temperature is set at 7 ° C. and the cooling water temperature is reduced from 37 ° C. to 25 ° C., it is clear that the cooling capacity increases by 21.6%. It has been proved experimentally that it is only necessary to lower the cold water temperature by using a high-pressure electric field in which heat is not substantially supplied to the heat exchange portion and a refrigerant such as ice or dry ice.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised to solve such a loss, and is intended to improve the heat exchange rate of cooling water by using "an electric field by high voltage" or "by using a refrigerant such as ice or dry ice". Heat exchange ”. The cooling increase function can be provided not only in the cooling tower main body but also outside, but the synergistic effect was exhibited by the combined use of "electric field by high voltage" and "heat exchange with refrigerants such as ice and dry ice". is there. As a method of the "electric field by high voltage", a high electric field is applied to an object to be cooled which is housed in a normal cooling device, as disclosed in Japanese Patent Application Laid-Open No. SHO 51-12138 "Cooling Method and Cooling Device". By using the principle that the cooling time can be extremely shortened and the cooling device can be operated efficiently, the synergy with "heat exchange with refrigerants such as ice and dry ice" is intended to achieve even greater energy savings. .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention promotes cooling of cooling water by setting a high-voltage electric field and exchanging heat using ice, dry ice or the like as a refrigerant. The high-voltage electric field is arranged by placing the electrode connected to the high-voltage power supply near the surface of the object to be cooled and indirectly or directly installing the object to be cooled.
It can be easily set. In this case, the electric field does not cause a substantial current flow through the electrodes. That is, it is economically free. Furthermore, if the principle of cooling of the object to be cooled in the "cooling method and cooling device" is explained, the inventor himself has not yet clarified a part of the object. It is presumed that the humidified air film in the part in contact with the cool air is removed and replaced with fresh cool air. According to infrared spectroscopy, it was presumed that the application of a high-voltage electric field caused a decrease in the specific heat of the object to be cooled. Also, unlike the conventional method, the cooling tower is designed so that the cooling water temperature is generally 32 ° C. at the inlet of the refrigerator. However, it is a feature of the present invention that the temperature is further lowered to 25 ° C. or less. Another characteristic is that another heat exchanger is provided. As a refrigerant used for heat exchange, ice, dry ice, or the like is determined to be appropriate from the viewpoint of cost effectiveness. In addition, heat is stored in the refrigerant by inexpensive midnight power, and the refrigerant is discharged during the daytime when the load on the refrigerator is high. As a result, the difference between the day and night electricity rates can be used, which is the most economical. This system can simultaneously implement the peak shift and energy saving that the power company recommends.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a schematic system diagram of the cooling tower. The heat exchanger of No. 6 is always in contact with the cooling water, and has a cooling capacity to keep the cooling water at 25 ° C. or less even when the outside air temperature reaches 30 ° C. or more. Have. Therefore, even if the outside air temperature is high, the cooling water can be kept at a low temperature even when the blower is hardly operated, so that a large energy saving effect can be achieved in the refrigerator as well. The secondary winding 3 of the high-voltage generating transformer 5 is 2
The electrodes 1 are arranged by suitable means through the high-voltage conductors. It is desirable that the electrodes are close enough to avoid contact with the water surface. Therefore, it is possible to increase the cooling capacity by lowering the installation value of the thermo sensor in the instrumentation diagram of FIG. 2 and to save energy without changing the device. Because it is easy. However, in the cooling tower, when the outside air temperature is high due to the contact of the cooling water with the air, the cooling water humidity also increases, which hinders efficient operation of the equipment. In the open-air cooling tower of the outside air contact type, a blower was operated to reduce the temperature of the cooling water, so that useless power was used. Furthermore, many of the blowers are driven by fan belts, and the frequency of starting and stopping is high, so that the maintenance cost for belt replacement has not become ridiculous. As a setting condition, the best heat exchange can be promoted only by applying an electric field of about 5 to 30 KV to the electrodes.

[0007]

According to the present invention, the above two cooling promotion effects are added, the cooling water temperature can always be kept at 25 ° C. or lower than the conventional system, and the efficiency of the refrigerator is driven by the compressor. In the case of an absorption type, it is possible to greatly reduce the amount of gas and oil used.

[Brief description of the drawings]

FIG. 1 is a diagram showing the cooling water temperature of a 100-RT screw type refrigerator and the cooling capacity with respect to the fluctuation of the cooling water temperature.

FIG. 2 is a flow diagram of a cooling water circulation system

FIG. 3 is an external view of a cooling tower that is built using a high-voltage electric field and a heat exchanger.

[Explanation of symbols]

1. Electrode 2. 2. High voltage conductor
Secondary wire loop 4. Ground wire 5. Transformer 6.
Heat exchanger 7. Cooling tower 8. Blower fan 9.
Motor 10. Makeup water 11. Ball tap 1
2. Circulation pump 13. Cooling water pipe 14. Shower nozzle 1
5. Cooling water 16. Condenser 17. Refrigerator 1
8. AC current 19. Thermosensor 20. Bypass valve 2
1. Blower 22. Sequence circuit 23. Temperature controller 24. Entrance 25. Exit

Claims (1)

[Claims] An AC high-voltage electric field where substantially no current is supplied to the heat exchange portion is supplied, and the other terminal is provided with a terminal.
A cooling method characterized by using a refrigerant such as ice or dry ice in combination and operating the cooling water temperature in the heat exchange part of the cooling tower at 25 ° C. or lower throughout the year.