JP2018141610A - Cooling system and cooling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology that prevents impurity adhesion to achieve improvement of heat radiation performance of an air-cooled condenser and concurrently enables reduction of facility costs.SOLUTION: The invention relates to a cooling system which cools suction air of an air-cooled condenser with evaporative latent heat of a liquid and includes: a nozzle which sprays the liquid to the suction air; and a switch device which switches the liquid sprayed from the nozzle to one of a cooling liquid for cooling the suction air and a cleaning liquid for cleaning a device existing in a spray passage of the cooling liquid.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooling system and a cooling method.

  Systems such as air-cooled chillers and air-cooled packaged air conditioners improve the operating efficiency during cooling operation as the refrigerant condensing temperature decreases, so water is sprayed on the condenser and sprayed with mist-like water on the intake air sucked by the condenser Thus, the heat radiation effect of the condenser is improved. Water used for watering or spraying is water, well water, industrial water, or the like. On the other hand, Patent Documents 1 and 2 disclose an invention in which impurities such as calcium and silica contained in water are removed by once permeating all water used for watering and spraying to a reverse osmosis membrane.

JP 2010-243144 A Japanese Patent Laid-Open No. 2006-56959

  When the water used for spraying or spraying the condenser contains a lot of impurities such as calcium and silica, the condenser and its surroundings, the place where the spray flow stays (the surface of the pressure plate of the condenser fin, the piping inside the outdoor unit) And the surface of the electrical equipment, the surface of the refrigerant pipe duct, etc.) and the impurities deposit and adhere to obstacles such as a mount in the middle of the spray flow path, resulting in problems such as deterioration of the heat dissipation performance of the condenser and discoloration of the external appearance of the device Invite.

  Therefore, there is a cooling system in which all water used for watering or spraying is once permeated through a reverse osmosis membrane and sprayed with water from which scale components such as silica are removed from impurities contained in water. In the case of this cooling system, the above-mentioned impurity adhesion problem does not occur. However, the reverse osmosis membrane device becomes large and increases the cost of the device. In addition, the operating cost of the reverse osmosis membrane device is also required. That is, although the effect of improving the heat dissipation performance by preventing the adhesion of impurities can be expected, the cost effectiveness is not increased.

  Accordingly, an object of the present application is to provide a technique for suppressing facility costs while realizing improvement in heat dissipation performance of an air-cooled condenser by preventing adhesion of impurities.

  In order to solve the above problems, in the present invention, not only the liquid from which impurities have been removed but also the liquid from which impurities have been removed is not simply sprayed into the intake air of the air-cooled condenser, but impurities are removed. It was decided to spray the liquid that was not present and the cleaning liquid.

  More specifically, the present invention relates to a cooling system that cools suction air of an air-cooled condenser with latent heat of vaporization of a liquid, the nozzle spraying the liquid against the suction air, and the liquid sprayed from the nozzle. A switching device for switching to one of a cooling liquid for cooling the liquid and a cleaning liquid for cleaning the apparatus present in the cooling liquid spray channel.

  However, the cleaning liquid here is a liquid having an effect of delaying precipitation of impurities contained in the cooling liquid or an effect of removing impurities. The effect of delaying the precipitation is by diluting the cooling liquid attached to the apparatus, and the effect of removing it is to dissolve the impurities.

  With such a cooling system, first, the heat dissipation performance of the condenser can be improved by spraying the liquid. Furthermore, when a cooling liquid that does not remove impurities is attached to an obstacle such as a condenser, its surroundings, a place where the spray flow stays or a stand in the middle of the spray flow path, the liquid to be sprayed is cooled. If the cleaning liquid is switched to the cleaning liquid, it is possible to prevent impurities from depositing and adhering to the place, and it is possible to prevent deterioration of the heat dissipation performance of the condenser and discoloration of the external appearance of the apparatus.

  The nozzle is preferably of a type that atomizes the liquid to be sprayed. By atomizing, the moisture contained in the droplets evaporates before reaching the condenser from the nozzle, so the impurities contained in the droplets become powder and scatter on the air current, and are discharged to the condenser and its surroundings. There is an effect of suppressing adhesion of impurities.

  In addition, the cooling liquid used in the cooling system according to the present invention may be at least one of clean water, well water, and industrial water (hereinafter referred to as cooling water), and the cleaning liquid is clean water, well water. Further, water having a lower concentration of impurities than industrial water (hereinafter referred to as cleaning water) or a cleaning agent capable of dissolving impurities may be used. With such a configuration, the cooling system can be operated using a liquid that is inexpensive and available in large quantities, and the operating cost can be suppressed.

  Further, the switching device provided in the cooling system according to the present invention may switch the liquid sprayed from the nozzle based on at least one of the impurity concentration of cooling water, the temperature around the condenser, the humidity, and the wind speed. By such a switching device, the spray amount of the cooling water, the cleaning water or the cleaning agent can be adjusted according to the easiness of precipitation of impurities, and the use amount of the cleaning liquid can be reduced.

  Further, the cooling system according to the present invention includes a reverse osmosis membrane device having a reverse osmosis membrane, and removes scale components contained in the cooling water by sending the cooling water to the reverse osmosis membrane device and permeating the reverse osmosis membrane, thereby washing the cooling system. You may produce water. If it is such a structure, it can utilize in order to produce | generate washing water by adding cooling water to the spray to a condenser. Therefore, for example, the water source for cooling and the water for cleaning can be made common.

  Moreover, the cooling system according to the present invention may include heating means for heating the cooling water to be sent to the reverse osmosis membrane device to a temperature range of 30 degrees to 40 degrees. The reverse osmosis membrane has a function of separating water subjected to high pressure into water concentrated in scale components and clean permeated water. During the permeation, the higher the water temperature, the lower the viscosity of the water, and the reverse osmosis membrane. Since the amount of permeated water can be increased with respect to the unit operating pressure, the power of the reverse osmosis membrane pump can be reduced, the size of the reverse osmosis membrane device can be reduced, the frequency of maintenance of the device can be increased, and the cost of the cooling system can be reduced. be able to. On the other hand, since there is a restriction on the heat resistance temperature of the material (polypropylene) used for the reverse osmosis membrane and the general-purpose tank, it is desirable to heat the water before permeation to a temperature range of 30 to 40 degrees.

  Moreover, the heating means used in the cooling system according to the present invention may be means using at least one of solar heat or heat generated when the cooling system is operated. By such heating means, energy saving of the cooling system can be realized.

In the cooling system according to the present invention, blow water from a cooling tower of another system may be used as cooling water. If the blow water from the cooling tower of other systems is used as cooling water, the temperature of the blow water itself is high in summer and other times, so there is no need to reheat, and less energy is required for reverse osmosis membrane permeation. Reduction of the reverse osmosis membrane pump power and size reduction of the reverse osmosis membrane device can be achieved, the maintenance frequency of the device can be lengthened, and the cost for the cooling system can be suppressed. When a mixed chemical of a scale dispersant, an anticorrosive, and a slime inhibitor is added to the water of the cooling tower, it is also useful for suppressing slime generation in the reverse osmosis membrane.

  By the way, when the cooling water contains a lot of organic substances, when the cooling water is heated from 30 degrees to 40 degrees, this water temperature range overlaps with the optimal growth temperature for algae, molds, bacteria, etc. May become a bacterial lime and permeate the reverse osmosis membrane to induce blockage of the reverse osmosis membrane. Therefore, the cooling system according to the present invention includes at least one of an activated carbon treatment device, a UV treatment device, an ozone treatment device, a device for adding hydrogen peroxide, or a device for adding a chemical containing copper ions or silver ions. An apparatus may be provided, and impurities contained in the cooling water may be removed using these apparatuses. If the cooling system includes the above-described device, it is possible to suppress the generation of bacterial lime, algae, and the like in the reverse osmosis membrane, and to prevent a decrease in the amount of reverse osmosis membrane permeated water due to the reverse osmosis membrane blockage.

  The present invention can also be understood from a method aspect. That is, the present invention is, for example, a cooling method for cooling the suction air of an air-cooled condenser with the latent heat of vaporization of the liquid, the spraying step of spraying the liquid against the suction air, and the liquid to be sprayed with the suction air. A cooling method may be provided that includes a cooling liquid to be cooled and a switching step of switching to either one of the cleaning liquid for washing the device present in the cooling liquid spray channel.

  The cooling system and the cooling method can provide a technique for suppressing facility costs while realizing improvement in heat dissipation performance of an air-cooled condenser by preventing impurity adhesion.

FIG. 1 is a configuration diagram of a cooling system according to an embodiment of the present invention. FIG. 2 is a block diagram of the cleaning water generator in FIG. FIG. 3 is a diagram showing the state of the cooling system during cooling and cleaning. (A) is during cooling, and (b) is during cleaning. FIG. 4 is a partially enlarged view of a cooling system that uses the exhaust heat of the condenser as means for heating the cooling water. FIG. 5 is a partially enlarged view of a cooling system that uses a solar heat collector as means for heating the cooling water. FIG. 6 is a configuration diagram of a cooling system that uses heat exchange with high-pressure liquid of an air-cooled packaged air conditioner as means for heating cooling water. FIG. 7 is a configuration diagram of a cooling system that uses indirect heat exchange with high-pressure liquid of an air-cooled packaged air conditioner as means for heating cooling water. FIG. 8 is a configuration diagram of a cooling system that uses heat exchange with the jacket exhaust heat of the spray pump as means for heating the cooling water. FIG. 9 is a configuration diagram of a cooling system that uses indirect heat exchange with the jacket exhaust heat of the spray pump as means for heating the cooling water. FIG. 10 is a configuration diagram of a cooling system that uses blow water from a cooling tower of another system as cooling water.

  Hereinafter, embodiments of the present invention will be described. Embodiment shown below is an example of embodiment of this invention, and does not limit the technical scope of this invention to the following aspects.

<System configuration>
FIG. 1 is a configuration diagram of a cooling system according to an embodiment of the present invention. The cooling system 100 shown in FIG. 1 cools the intake air of the condenser with the latent heat of evaporation of the liquid in order to improve the heat dissipation performance of the air-cooled condenser included in the chiller, the packaged air conditioner for the facility, the packaged air conditioner for the shop office, the room air conditioner, etc. It is a cooling system. Here, cooling water (hereinafter referred to as tap water) such as clean water, well water, and industrial water is used as an example of a cooling liquid for cooling the intake air. As shown in FIG. 1, a cooling system 100 is included in a nozzle 2 that sprays mist-like water onto the suction air of an air-cooled condenser 1 such as the above-described chiller, a spray pump 3 that sends water to the nozzle 2, and tap water. A cleaning water generator 4 for generating cleaning water by removing impurities (an example of “cleaning liquid” in the present application), a first pump 5 for sending tap water to the cleaning water generator 4, and generated cleaning water A water tank 6 for washing is stored. The cooling system 100 includes a pipe from the tap water supply source to the first pump 5, a pipe from the tap water supply source to the spray pump 3, a pipe from the first pump 5 to the cleaning water generator 4, A pipe from the water generator 4 to the washing water tank 6, a pipe from the washing water tank 6 to the spray pump 3, and a first valve for adjusting the amount of tap water supplied from the tap water supply source to the spray pump 3 7 and a second valve 8 for adjusting the amount of cleaning water supplied from the cleaning water tank 6 to the spray pump 3. When switching the water sprayed from the nozzle 2 to one of tap water and cleaning water, the first valve 7 and the second valve 8 are opened and closed.

  The nozzle 2 atomizes and sprays water to be sprayed. In addition, the nozzle 2 uses a one-fluid nozzle that does not use compressed air by making the spray pump 3 a plunger pump that can obtain a high pressure of 4 to 6 MPa, and a pipe type through which tap water can withstand 4 to 6 MPa. Can do.

  FIG. 2 is a configuration diagram of the cleaning water generator 4. The washing water generator 4 has activated carbon 10 and supporting gravel 11 that supports the activated carbon 10, and is filtered by an activated carbon filter 9 that removes residual chlorine and total organic carbon contained in tap water, and the activated carbon filter 9, and then taps water. A reverse osmosis membrane device 12 for removing scale components contained in water and a security prefilter 13 for protecting the reverse osmosis membrane are provided. Further, the cleaning water generating device 4 has a pipe from the activated carbon filter 9 to the prefilter 13 and a pipe from the prefilter 13 to the reverse osmosis membrane device 12. The reverse osmosis membrane device 12 has a pipe for discharging the reverse osmosis membrane concentrated water generated when the tap water is permeated, and a pipe for circulating the reverse osmosis membrane concentrated water to the reverse osmosis membrane device again. The reverse osmosis membrane is, for example, ESPA 2-4040 manufactured by Nitto Denko Corporation. Further, a UF (ultrafiltration) membrane may be used instead of the reverse osmosis membrane. With this configuration, cleaning water can be generated using tap water, and the amount of tap water for generating cleaning water can be reduced by reusing the reverse osmosis membrane concentrated water.

  FIG. 3 is a diagram illustrating a state of the cooling system 100 when the tap water is sprayed and when the cleaning water is sprayed. (A) is the former state, and (b) is the latter state. As shown in (a), in the former case, only the tap water is sent to the spray pump 3 by opening the first valve 7 and closing the second valve 8. On the other hand, as shown in (b), in the latter case, only the cleaning water is sent to the spray pump 3 by opening the second valve 8 and closing the first valve 7. The first valve 7 and the second valve 8 may be operated manually or automatically. In the case of automatic operation, the opening and closing of the valve may be executed by a timer, or a measurement device that estimates the easiness of precipitation of impurities may be provided in the cooling system 100 and may be executed according to the estimation result.

  Next, the operation of the cooling system during cleaning (hereinafter referred to as “rinse operation”) will be described. Since the cleaning water is water obtained by removing impurities from tap water, it is often relatively expensive. For this reason, the rinse operation is performed so as to achieve a predetermined purpose while suppressing the spray amount of the cleaning water from the viewpoint of cost effectiveness. It is desirable. In order to achieve this, a rinsing operation is started before the impurities are deposited in the water film of spray water, or when impurities are dripped from the adhesion surface using cleaning water. It is desirable to finish the rinsing operation promptly after the water film is sufficiently diluted with the cleaning water. Next, a rinse operation interval and a rinse duration time that satisfy this requirement are calculated.

First, regarding the rinse operation interval, the time until the impurities in the water film are deposited is calculated from the impurity concentration of tap water, the outside air temperature and humidity conditions, and the wind speed. Here, the case where the impurity component is mainly calcium carbonate will be described. Assuming that the outside air conditions are a temperature of 25 degrees, a humidity of 60%, and a wind speed of 2 m / s, the evaporation rate E [ mm / day] is calculated according to the equation of Zaykov (1).
E = (0.15 + 0.108v) · (e0−e1)
= (0.15 + 0.108 × 2). (31.7-19.0)
= 4.6 [mm / day] (1)
Where v is the wind speed [m / s], e0 is the water vapor pressure [hPa] near the water film, and e1 is the water vapor pressure [hPa] in the air. It is considered that the calcium carbonate that has combined with the evaporating water stays in the water film without evaporating, but the rate of increase of the calcium carbonate remaining in the water film is calculated as shown in equation (2). The However, it is assumed that the hardness of clean water sprayed from the nozzle is 60 mg / L, and that the clean water is concentrated twice when reaching the water film (hardness 120 mg / L).
(4.6 / 1000/24) [m / h] × (120 × 1000) [mg / m ³ ]
= 23.2 [mg / (m ² · h)] (2)
On the other hand, the solubility of calcium carbonate in water is 820 mg / L at 25 ° C. water temperature (Chemical Handbook Basic Edition II Rev. 3). The time until precipitation is calculated according to equation (3). However, it is assumed that the initial value of calcium carbonate dissolved in the water film is 0 mg / m ³ by the rinsing operation.
(820-0) × 0.1 [mg / m ² ] /23.2 [mg / m ² · h]
= 3.5 [h] (3)
That is, precipitation of calcium carbonate can be prevented by rinsing every 3.5 hours. For example, if the safety factor is 1.1 times, the actual rinse interval is estimated to be about 3 hours. In this way, it is possible to switch between tap water and cleaning water by calculating the rinse operation interval from the impurity concentration of tap water, the outside air temperature humidity condition, and the wind speed.

  Similarly, when the outside air conditions are the conditions of summer TAC 2.5, 14:00 in Tokyo and the temperature is the highest (temperature 33.4 degrees, humidity 57.3%, wind speed 2 m / s) (1) If the time until calcium carbonate is precipitated is calculated using the equations (2) and (3), 2.0 hours is obtained. For example, if the safety factor is 1.1 times, the actual rinse interval is estimated to be about 1.8 hours. As described above, the rinse operation interval may be precisely adjusted according to the easiness of precipitation of impurities.

The rinse duration is the time required to replace the water film with cleaning water. The amount of spray water that reaches the surface of the water film depends on the spray amount of the nozzle, the spray angle, the distance from the nozzle, and the amount of evaporation while reaching the water film. If this is assumed to be 3 L / m ² h, When the thickness is 0.1 mm, the rinse continuation time is calculated as in equation (4).
(0.1 / 1000) [m] / (3/1000) [m ³ / m ² h]
= 0.033 [h]
= 2 [min] (4)
That is, if rinsing is continued for 2 minutes, the water film is replaced with cleaning water. For example, if the safety factor is doubled, the actual rinse duration is estimated to be 4 minutes. The rinse duration time may be adjusted as in the above calculation.

  The capacity of the cleaning water generator 4 and the water tank 6 is determined from the amount of spray water and the shortest rinse operation interval (approximately one hour or more from the above calculation). Also, when spraying is started / stopped according to the outside air temperature / humidity conditions and the operating state of the equipment to be cooled, the start / stop interval is longer than the minimum rinse operation interval, and the rinse operation is always performed for a certain period of time before spraying is stopped. Make sure there is no tap water inside.

  This trial calculation is an example, and the optimum rinse operation interval and rinse duration time change according to the actual driving situation.

  Since the cooling system 100 as described above cools the intake air of the condenser and uses a relatively small amount of cleaning water to clean a device with tap water, the heat dissipation performance of the condenser is improved. The cost necessary for preventing the adhesion of impurities can be suppressed while realizing the above.

ここで、ｔは水温[度]、ＴＣＦは２５度（標準温度）における逆浸透膜の透過水量を１とした係数、Ｑ_ａは試験温度における透過水量 ［ｍ^３／ｄ］、Ｑ_０は標準温度における透
過水量［ｍ^３／ｄ］であり、数１の（５）式はＨｙｄｒａｎａｕｔｉｃｓ社資料、数２の（６）式はＪＩＳ Ｋ ３８０５：０９９０ 逆浸透エレメント及びモジュールの性能試験方法より引用した。数１の（５）式、数２の（６）式より、ある温度における透過水量が算出される。例えば、水道水（２６度：東京都水道局 平成２６年年度の水道水の水温（都庁付近））を逆浸透膜の運転上限温度（例えば４０度）まで昇温させると、透過水量が約１．５倍に増量される試算となるため、逆浸透膜ポンプ動力を減らして逆浸透膜装置を小型化できる。これによって、装置のメンテナンス頻度が長くなり、冷却システムにかかる費用を抑制することができる。また、不純物成分がシリカ（ＳｉＯ_２）主体の場合、洗浄用水温度が高いほど溶解度が向上しリンス効果が高まる。よって本実施形態にかかる冷却システム１００は逆浸透膜を透過させる水道水を３０度から４０度まで加熱する加熱手段を備えてもよい。 <Modification>
In addition to reducing the amount of expensive cleaning water by rinsing operation, tap water that permeates the reverse osmosis membrane is heated before permeation to reduce the viscosity and increase the permeate amount per unit operating pressure to the reverse osmosis membrane. Can also be cost-effective. The relationship between the reverse osmosis membrane and the amount of permeated water is as shown in Equation 1 (5) and Equation 2 (6).

Here, t is a water temperature [degree], TCF is a coefficient with the permeate amount of the reverse osmosis membrane being 1 at 25 degrees (standard temperature), Q _a is _a permeate amount [m ³ / d] at the test temperature, and Q ₀ is a standard The amount of permeated water at temperature [m ³ / d]. Equation (5) in Equation 1 was quoted from the Hydranautics material, and Equation (6) in Equation 2 was quoted from the performance test method for reverse osmosis elements and modules. . The permeated water amount at a certain temperature is calculated from Equation (5) in Equation 1 and Equation (6) in Equation 2. For example, when the tap water (26 degrees: Tokyo Waterworks Bureau, 2014 water temperature (around Tokyo Metropolitan Government)) is raised to the upper limit temperature of the reverse osmosis membrane (for example, 40 degrees), the amount of permeated water is about 1 Therefore, the reverse osmosis membrane device can be downsized by reducing the reverse osmosis membrane pump power. As a result, the maintenance frequency of the apparatus becomes longer, and the cost for the cooling system can be suppressed. When the impurity component is mainly composed of silica (SiO ₂ ), the solubility is improved and the rinsing effect is increased as the cleaning water temperature is higher. Therefore, the cooling system 100 according to the present embodiment may include heating means for heating the tap water that permeates the reverse osmosis membrane from 30 degrees to 40 degrees.

  In addition, when many organic substances are contained in tap water, when this is heated from 30 degrees to 40 degrees, this water temperature range overlaps with the optimum temperature for growth of algae, molds, bacteria, etc., so that they are bacteria. When it becomes a slime and permeates through the reverse osmosis membrane, there is a risk of inducing a reverse osmosis membrane blockage. In such a case, tap water may be permeated through the reverse osmosis membrane without heating, and the generated cleaning water may be heated.

  FIG. 4 is a partially enlarged view of a cooling system that uses tap water as the above-described heating means and the exhaust heat of the condenser 1. This modification includes a heated pipe 14 through which tap water passes and is heated by the exhaust heat of the condenser 1. Since the heated pipe 14 is heated, it is desirable not to insulate. By such heating means, energy saving of the cooling system can be realized, and cost effectiveness can be enhanced.

Moreover, you may utilize a solar heat as a means to heat tap water, and the elements on larger scale of the modification are shown in FIG. This modification includes a solar heat collector 15, a first water tank 16, and a second pump 17 that sends tap water from the first water tank 16 to the solar heat collector 15. In addition, a pipe extending from the first water tank 16 to the second pump 17 and a pipe extending from the second pump 17 to the solar heat collector 15 are provided. Moreover, you may have a circulation piping through which tap water circulates from the solar-heat collector 15 to the 1st water tank 16. FIG. By such heating means, energy saving of the cooling system can be realized, and cost effectiveness can be enhanced.

  Further, as means for heating the tap water, heat exchange with the high-pressure liquid of the air-cooled packaged air conditioner may be used, and its configuration diagram is shown in FIG. This modification includes a cooling water return pipe from the first pump 5 to the refrigerant / water heat exchanger 19 in the subcool unit 18, and a cooling water outlet pipe from the refrigerant / water heat exchanger 19 to the cleaning water generator 4. Have.

  Further, as shown in FIG. 7, the second water tank 27 and a third pump 28 for sending tap water from the second water tank 27 to the refrigerant / water heat exchanger 19 are provided to indirectly exchange heat with the high-pressure liquid of the air-cooled packaged air conditioner. Also good. By such heating means using heat exchange with the high-pressure liquid of the air-cooled packaged air conditioner, energy saving of the cooling system can be realized, and cost effectiveness can be enhanced.

  Further, as a means for heating the tap water, jacket exhaust heat of the spray pump may be used, and FIG. 8 shows a configuration diagram thereof. This modification includes a spray pump 29 with a jacket, a jacket 30 of the pump, and a fourth pump 31 that sends tap water from the second water tank 27 to the jacket 30.

  Moreover, you may provide the circulation piping through which a tap water circulates through the 2nd water tank 27 and the jacket 30 like FIG. By such heating means using the jacket exhaust heat of the spray pump, energy saving of the cooling system can be realized, and cost effectiveness can be enhanced.

  Further, instead of the tap water, the blow water of the cooling tower 32 of another system may be used as the cooling water, and its configuration is shown in FIG. By using the blow water from the cooling tower of other systems as cooling water, the water temperature of the blow water itself is high during the season when the condenser needs to be cooled, such as in summer. If not, less energy is required for transmission. When a mixed chemical of a scale dispersant, an anticorrosive, and a slime inhibitor is added to the water of the cooling tower, it is also useful for suppressing slime generation in the reverse osmosis membrane.

  The cooling system shown in FIGS. 4 to 10 is at least one of an activated carbon treatment device, a UV treatment device, an ozone treatment device, a device for adding hydrogen peroxide, or a device for adding a chemical agent containing copper ions or silver ions. Any one device may be provided. In the process of sending heated tap water to the cleaning water generating device 4, the generation of slime or algae in the reverse osmosis membrane can be suppressed by passing the tap water through the device as described above, and the maintenance frequency of the device can be reduced. This can lengthen the cost of the cooling system.

  In addition, the cleaning water used in the cooling system 100 and the cooling system shown in FIGS. 4 to 10 was generated by allowing tap water to permeate through the reverse osmosis membrane. Instead of the cleaning water, for example, PermaClean 33 manufactured by Nalco Corporation. Alternatively, a scale cleaning agent such as Sun Free UK / MJ manufactured by Amtec Corporation may be used. By using these, the apparatus which produces | generates the water for washing | cleaning from tap water can be reduced.

1 ・ ・ Air-cooled condenser; 2 ・ ・ Nozzle; 3 ・ ・ Spray pump; 4 ・ ・ Water generator for washing;
・ First pump; 6. ・ Water tank for cleaning; 7 ・ ・ First valve; 8 ・ ・ Second valve; 9 ・ ・ Activated carbon filter; 10 ・ ・ Activated carbon; 11 ・ ・ Support gravel; 12 ・ ・ Reverse osmosis membrane Equipment: 13. Prefilter; 14. Heated piping; 15. Solar collector; 16. First tank; 17. Second pump; 18. Subcool unit; Exchanger; 20 ... Indoor unit; 21 ... Evaporator; 22. Expansion valve; 23 ... Outdoor unit; 24 ... Compressor; 25 ... Accumulator; 26 ... Liquid receiver; 28 .. Third pump; 29 .. Spray pump with jacket; 30 ... Jacket; 31 ... Fourth pump; 32 ... Cooling tower of other systems;

Claims (10)

A cooling system for cooling air sucked into an air-cooled condenser with latent heat of vaporization of liquid,
A nozzle for spraying a liquid against the suction air;
A switching device that switches the liquid sprayed from the nozzle to one of a cooling liquid that cools the suction air and a cleaning liquid that cleans a device present in the spray flow path of the cooling liquid; Prepare
Cooling system. The nozzle atomizes and sprays the cooling liquid;
The cooling system according to claim 1. The cooling liquid is at least one of tap water, well water, and industrial water,
The cleaning liquid is water having a lower impurity concentration than the clean water, well water, industrial water, or a cleaning agent capable of removing the impurities.
The cooling system according to claim 1 or 2. The switching device switches the liquid sprayed from the nozzle based on at least one of the impurity concentration of the cooling liquid, the temperature around the condenser, the humidity, or the wind speed,
The cooling system according to claim 3. The cooling system includes a reverse osmosis membrane device having a reverse osmosis membrane, and removes impurities contained in the cooling liquid by sending the cooling liquid to the reverse osmosis membrane device and permeating the reverse osmosis membrane. Produce a cleaning liquid,
The cooling system according to claim 3 or 4. The cooling system includes heating means for heating the cooling liquid to be sent to the reverse osmosis membrane device to a temperature range of 30 degrees to 40 degrees.
The cooling system according to claim 5. The heating means is means using at least one of solar heat or heat generated when operating the cooling system.
The cooling system according to claim 6. The cooling system uses blow water from a cooling tower of another system as the cooling liquid.
The cooling system according to any one of claims 1 to 7. The cooling system includes at least one of an activated carbon treatment device, a UV treatment device, an ozone treatment device, a device for adding hydrogen peroxide, or a device for adding a chemical containing copper ions or silver ions, Removing impurities contained in the cooling liquid using an apparatus;
The cooling system according to any one of claims 6 to 8. A cooling method for cooling the intake air of an air-cooled condenser with the latent heat of vaporization of liquid,
A spraying step of spraying a liquid on the suction air;
A switching step of switching the liquid to be sprayed to one of a cooling liquid that cools the suction air and a cleaning liquid that cleans a device present in the spray flow path of the cooling liquid.
Cooling method.

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