JP6986846B2 - Cooling system and cooling method - Google Patents

Description

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

Systems such as air-cooled chillers and air-cooled package air conditioners improve the operating efficiency during cooling operation as the condensation temperature of the refrigerant decreases, so water is sprinkled on the condenser and mist-like water is sprayed on the suction air sucked by the condenser. As a result, the heat dissipation effect of the condenser is improved. The water used for sprinkling and spraying is clean water, well water, industrial water, etc. On the other hand, Patent Documents 1 and 2 disclose an invention for removing impurities such as calcium and silica contained in water by once permeating all the water used for watering or spraying through the reverse osmosis membrane.

Japanese Unexamined Patent Publication No. 2010-243144 Japanese Unexamined Patent Publication No. 2016-56959

If the water used for watering or spraying the condenser contains a large amount of impurities such as calcium and silica, the condenser and its surroundings, the place where the spray flow stays (the surface of the holding plate of the condenser fins, the piping inside the outdoor unit) , The surface of electrical equipment, the surface of the refrigerant pipe duct, etc.) and obstacles such as the gantry in the middle of the spray flow path, these impurities precipitate and adhere, causing problems such as deterioration of the heat dissipation performance of the condenser and discoloration of the appearance of the device. Invite.

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

Therefore, it is an object of the present application to provide a technique for suppressing the equipment cost while improving the heat dissipation performance of the air-cooled condenser by preventing the adhesion of impurities.

In order to solve the above problems, in the present invention, impurities are removed instead of simply spraying only the liquid from which impurities have not been removed or only the liquid from which impurities have been removed from the suction air of the air-cooled condenser. It was decided to switch between the non-impurity liquid and the cleaning liquid and spray.

Specifically, the present invention is a cooling system that cools the suction air of an air-cooled condenser with the latent heat of evaporation of the liquid, and the nozzle that sprays the liquid on the suction air and the liquid sprayed from the nozzle are sucked air. It is provided with a switching device for switching between the cooling liquid for cooling and the cleaning liquid for cleaning the device existing in the spray flow path of the cooling liquid.

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

With such a cooling system, the heat dissipation performance of the condenser can be improved by first spraying the liquid. Furthermore, when an obstacle such as a condenser or its surroundings, a place where the spray flow stays, or a gantry in the middle of the spray flow path has a cooling liquid that does not remove impurities, the liquid to be sprayed is the cooling liquid. It is possible to prevent impurities from precipitating and adhering to the above-mentioned places by switching to the cleaning liquid from the above, and it is possible to prevent deterioration of the heat dissipation performance of the condenser and discoloration of the appearance of the apparatus.

Further, it is desirable that the nozzle is a type that atomizes the liquid to be sprayed. By atomizing, the water contained in the droplet evaporates from the nozzle to the condenser, and the impurities contained in the droplet become powder and scatter on the airflow to the condenser and its surroundings. It has the effect of suppressing the adhesion of impurities.

Further, 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 and well water. , 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 can be obtained in a large amount at a low cost, 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 to be sprayed from the nozzle based on at least one of the impurity concentration of the cooling water, the air temperature around the condenser, the humidity and the wind speed. With such a switching device, the amount of spray of cooling water, cleaning water or cleaning agent can be adjusted according to the ease of precipitation of impurities, and waste of the amount of cleaning liquid used can be reduced.

Further, the cooling system according to the present invention includes a reverse osmosis membrane device having a reverse osmosis membrane, and sends cooling water to the reverse osmosis membrane device to permeate the reverse osmosis membrane to remove scale components contained in the cooling water for cleaning. Water may be generated. With such a configuration, the cooling water can be used to generate cleaning water in addition to spraying on the condenser. Therefore, for example, the water source for cooling water and cleaning water can be shared.

Further, the cooling system according to the present invention may include a heating means for heating the cooling water sent to the reverse osmosis membrane device to a temperature range of 30 to 40 degrees. The reverse osmosis membrane has the function of separating water under high pressure into water with concentrated scale components and clean permeable water, but during the permeation, the higher the water temperature, the lower the viscosity of the water, and the reverse osmosis membrane. Since it is possible to increase the amount of permeated water with respect to the unit operating pressure, the reverse osmosis membrane pump power can be reduced and the reverse osmosis membrane device can be downsized, the maintenance frequency of the device can be lengthened, and the cost of the cooling system can be suppressed. be able to. On the other hand, since the heat resistant temperature of the material (polypropylene) used for the reverse osmosis membrane and the general-purpose tank is limited, it is desirable to heat the water before permeation to a temperature range of 30 to 40 degrees.

Further, the heating means used in the cooling system according to the present invention may be a means using at least one of solar heat and heat generated when operating the cooling system. By such a heating means, energy saving of the cooling system can be realized.

Further, in the cooling system according to the present invention, blow water from a cooling tower of another system may be used as the cooling water. If the blow water from the cooling tower of another system is used as the cooling water, the blow water itself is high in temperature during the summer, so there is no need for new heating, and less energy is required for reverse osmosis membrane permeation. The reverse osmosis membrane pump power can be reduced and the reverse osmosis membrane device can be downsized, the maintenance frequency of the device can be lengthened, and the cost of the cooling system can be suppressed. When a mixed chemical of a scale dispersant, an anticorrosive agent, and an anti-slime agent is added to the water of the cooling tower, it also helps to suppress the generation of slime 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 optimum temperature for the growth of algae, molds, bacteria, etc. May become bacterial lime and induce reverse osmosis membrane obstruction when permeating the reverse osmosis membrane. Therefore, the cooling system according to the present invention is at least one of an activated carbon treatment device, a UV treatment device, an ozone treatment device, a device for adding hydrogen peroxide, and a device for adding a drug containing copper ion or silver ion. Devices may be provided and these devices may be used to remove impurities contained in the cooling water. If the cooling system is provided with the above-mentioned device, it is possible to suppress the generation of bacterial slime, algae and the like in the reverse osmosis membrane, and prevent a decrease in the amount of water permeated through the reverse osmosis membrane due to blockage of the reverse osmosis membrane.

The present invention can also be grasped from the aspect of the method. That is, the present invention is, for example, a cooling method in which the suction air of an air-cooled condenser is cooled by the latent heat of evaporation of the liquid, in which a spraying step of spraying the liquid on the suction air and a spraying liquid of the suction air are used. The cooling method may include a switching step of switching between the cooling liquid to be cooled and the cleaning liquid for cleaning the device existing in the spray flow path of the cooling liquid.

The above-mentioned cooling system and cooling method can provide a technique for suppressing equipment cost while improving heat dissipation performance of an air-cooled condenser by preventing impurities from adhering.

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

Hereinafter, embodiments of the present invention will be described. The embodiments shown below are examples of embodiments of the present invention, and the technical scope of the present invention is not limited to the following embodiments.

<System configuration>
FIG. 1 is a block diagram of a cooling system according to an embodiment of the present invention. The cooling system 100 shown in FIG. 1 cools the suction air of the air-cooled condenser of a chiller, a packaged air conditioner for equipment, a packaged air conditioner for a store office, a room air conditioner, etc. by latent heat of liquid evaporation in order to improve the heat dissipation performance of the condenser. It is a cooling system. Here, as an example of the cooling liquid for cooling the suction air, cooling water such as tap water, well water, and industrial water (hereinafter referred to as tap water) is used. As shown in FIG. 1, the cooling system 100 is included in a nozzle 2 that sprays mist-like water onto the suction air of the air-cooled condenser 1 such as the above-mentioned chiller, a spray pump 3 that sends water to the nozzle 2, and tap water. A cleaning water generator 4 that removes impurities to generate cleaning water (an example of a "cleaning liquid" in the present application), a first pump 5 that sends tap water to the cleaning water generator 4, and the generated cleaning water. It is provided with a washing water tank 6 that can store water. Further, 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, and cleaning. The pipe from the water generator 4 to the cleaning water tank 6, the pipe from the cleaning water tank 6 to the spray pump 3, and the 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 water supplied for washing from the washing water tank 6 to the spray pump 3. When the water sprayed from the nozzle 2 is switched to either tap water or cleaning water, the first valve 7 and the second valve 8 are opened and closed.

The nozzle 2 atomizes the water to be sprayed and sprays it. Further, the spray pump 3 is a plunger pump that can obtain a high pressure of 4 to 6 MPa, and the pipe through which tap water passes is a pipe type that can withstand 4 to 6 MPa, so that one fluid nozzle that does not use compressed air is used for the nozzle 2. Can be done.

FIG. 2 is a block diagram of the washing water generator 4. The washing water generator 4 has an activated carbon 10 and a supporting gravel 11 that supports the activated carbon 10, and is filtered by an activated carbon filter 9 and an activated carbon filter 9 that remove residual chlorine and all organic carbon contained in tap water, and then tap water. A reverse osmosis membrane device 12 for removing scale components contained in water and a safety pre-filter 13 for protecting the reverse osmosis membrane are provided. Further, the washing water generation device 4 has a pipe from the activated carbon filter 9 to the pre-filter 13 and a pipe from the pre-filter 13 to the reverse osmosis membrane device 12. Further, the reverse osmosis membrane device 12 has a pipe for discharging the reverse osmosis membrane concentrated water generated when tap water is permeated to the outside of the system, 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, ESPA2-4040 manufactured by Nitto Denko Corporation. Further, a UF (ultrafiltration) membrane may be used instead of the reverse osmosis membrane. With this configuration, tap water can be used to generate wash water, and by reusing the reverse osmosis membrane concentrated water, the amount of tap water for producing wash water can be reduced.

FIG. 3 is a diagram showing a state of the cooling system 100 at the time of spraying tap water and at the time of spraying cleaning water. (A) is the former state, and (b) is the latter state. As shown in (a), in the former case, only 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 manually operated or automatically operated. In the case of automatic operation, opening and closing of the valve may be executed by a timer, or may be executed according to the estimation result by providing a measuring device for estimating the susceptibility of impurities to precipitate in the cooling system 100.

Next, the operation of the cooling system during cleaning (hereinafter referred to as rinsing operation) will be described. Cleaning water is often relatively expensive because it is tap water from which impurities have been removed. Therefore, from the viewpoint of cost effectiveness, rinse operation is performed so as to achieve the specified purpose while suppressing the amount of cleaning water sprayed. Is desired. In order to achieve this, the rinsing operation is started on the verge of precipitation of impurities in the water film of the spray water, or even when impurities are deposited, while the impurities can be dropped from the adhered surface using cleaning water. It is desirable to end the rinse operation immediately after the water film is sufficiently diluted with washing water. Next, the rinse operation interval and the rinse duration that satisfy this are calculated.

First, regarding the rinse operation interval, the time until 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, a case where the impurity component is mainly calcium carbonate will be described. Assuming that the outside air conditions are temperature 25 degrees, humidity 60%, and wind speed 2 m / s, the evaporation rate E [ When [mm / day] is calculated by the formula of Zaykov, it becomes as in the formula (1).
E = (0.15 + 0.108v) · (e0-e1)
= (0.15 + 0.108 × 2) · (31.7-19.0)
= 4.6 [mm / day] ... (1)
However, v is the wind speed [m / s], e0 is the water vapor pressure [hPa] in the vicinity of the water film, and e1 is the water vapor pressure [hPa] in the air. It is thought that calcium carbonate that was bound to the water that evaporates with evaporation does not evaporate and stays in the water film, but the rate of increase of calcium carbonate that stays in the water film is calculated as in Eq. (2). To. However, it is assumed that the hardness of the clean water sprayed from the nozzle is 60 mg / L, and the clean water is twice concentrated when it reaches 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 a water temperature of 25 degrees (Chemical Handbook Basics II Revised 3rd Edition), so if the thickness of the water film is 0.1 mm, calcium carbonate will be released from the water film. The time until precipitation is calculated as shown in Eq. (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) x 0.1 [mg / m ² ] /23.2 [mg / m ² · h]
= 3.5 [h] ... (3)
That is, the precipitation of calcium carbonate can be prevented by rinsing every 3.5 hours. If the safety factor is, for example, 1.1 times, the actual rinsing interval is estimated to be about 3 hours. In this way, the rinse operation interval can be calculated from the impurity concentration of tap water, the outside air temperature / humidity conditions, and the wind speed, and the tap water and the washing water can be switched.

Similarly, when the outside air condition is the summer TAC 2.5, 14:00 in Tokyo and the temperature is the highest (assuming temperature 33.4 degrees, humidity 57.3%, wind speed 2 m / s), (1) The time required for calcium carbonate to precipitate using the equations (2) and (3) is calculated to be 2.0 hours. If the safety factor is, for example, 1.1 times, the actual rinsing interval is estimated to be about 1.8 hours. As described above, the rinsing operation interval may be precisely adjusted according to the ease of precipitation of impurities.

Rinse duration is the time required to replace the water film with wash water. Spraying amount of water reaching the water film surface depends on the amount of evaporation between reaching the distance and the water film between the spray volume and spray angle nozzles of the nozzle, but if this is assumed to 3L / m 2 ^h, the water film When the thickness is 0.1 mm, the rinse duration is calculated as in Eq. (4).
(0.1 / 1000) [m] / (3/1000) [m ³ / m ² h]
= 0.033 [h]
= 2 [min] ... (4)
That is, it is a trial calculation that the water film is replaced with the washing water if the rinsing is continued for 2 minutes. If the safety factor is doubled, for example, the actual rinse duration is estimated to be 4 minutes. The rinse duration may be adjusted as in the above calculation.

The capacity of the washing water generator 4 and its water tank 6 is determined from the amount of sprayed water and the shortest rinsing operation interval (about 1 hour or more from the above estimation). If the spray is started and stopped according to the outside air temperature and humidity conditions and the operating condition of the equipment to be cooled, the start and stop interval should be longer than the minimum rinse operation interval, and the rinse operation should be performed for a certain period of time before the spray is stopped. Make sure that no tap water remains inside.

This trial calculation is an example, and the optimum rinse operation interval and rinse duration will change depending on the actual operating conditions.

The cooling system 100 as described above cools the suction air of the condenser and uses a minimum amount of relatively expensive cleaning water to clean the device with tap water, so that the heat dissipation performance of the condenser is improved. It is possible to reduce the cost required to prevent the adhesion of impurities 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 example>
In addition to reducing the amount of expensive cleaning water by rinsing operation, the viscosity is reduced by heating tap water that permeates the reverse osmosis membrane before permeation, and the amount of permeated water with respect to the unit operating pressure to the reverse osmosis membrane is increased. Can also be cost-effective. The relationship between the reverse osmosis membrane and the amount of permeated water is as in Eq. 1 (5) and Eq. 2 (6).

Here, t is the water temperature [degrees], TCF is a coefficient with the amount of water permeated by the reverse osmosis membrane at 25 degrees (standard temperature) as 1, Q _a is the amount of water permeated at the test temperature [m ³ / d], and Q ₀ is the standard. The amount of permeated water at temperature [m ³ / d], the formula (5) of equation 1 is quoted from the materials of Hydronautics, and the equation (6) of equation 2 is quoted from the performance test method of JIS K 3805: 0990 reverse osmosis element and module. .. The amount of permeated water at a certain temperature is calculated from the equation (5) of the equation 1 and the equation (6) of the equation 2. For example, when tap water (26 degrees: Tokyo Waterworks Bureau, 2014 tap water temperature (near the Tokyo Metropolitan Government)) is raised to the upper limit of operation of the reverse osmosis membrane (for example, 40 degrees), the amount of permeated water is about 1. Since the amount is estimated to be increased by 5.5 times, the reverse osmosis membrane pump power can be reduced and the reverse osmosis membrane device can be miniaturized. As a result, the maintenance frequency of the device becomes long, and the cost of the cooling system can be suppressed. Further, when the impurity component is _{mainly silica (SiO 2} ), the higher the temperature of the washing water, the higher the solubility and the higher the rinsing effect. Therefore, the cooling system 100 according to the present embodiment may include a heating means for heating tap water that permeates the reverse osmosis membrane from 30 degrees to 40 degrees.

In addition, when tap water contains a large amount of organic substances, 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 slime and permeates the reverse osmosis membrane, it may induce reverse osmosis membrane obstruction. In such a case, the generated washing water may be heated by allowing the reverse osmosis membrane to permeate without heating the tap water.

FIG. 4 is a partially enlarged view of a cooling system that utilizes the exhaust heat of the condenser 1 for tap water as the above-mentioned heating means. 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 it. By such a heating means, energy saving of the cooling system can be realized, and cost effectiveness can be enhanced.

Further, solar heat may be used as a means for heating tap water, and FIG. 5 shows a partially enlarged view of a modified example thereof. 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. Further, it has a pipe from the first water tank 16 to the second pump 17, and a pipe from the second pump 17 to the solar heat collector 15. Further, a circulation pipe for circulating tap water from the solar heat collector 15 to the first water tank 16 may be provided. By such a heating means, energy saving of the cooling system can be realized, and cost effectiveness can be enhanced.

Further, as a means for heating tap water, heat exchange with a high-pressure liquid of an air-cooled package air conditioner may be used, and FIG. 6 shows a configuration diagram thereof. 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 outbound pipe from the refrigerant / water heat exchanger 19 to the cleaning water generator 4. Have.

Further, as shown in FIG. 7, a third pump 28 for sending tap water from the second water tank 27 and the second water tank 27 to the refrigerant / water heat exchanger 19 is provided, and indirect heat exchange is performed with the high-pressure liquid of the air-cooled package air conditioner. May be good. Energy saving of the cooling system can be realized and cost effectiveness can be improved by the heating means utilizing heat exchange with the high pressure liquid of the air-cooled package air conditioner as described above.

Further, as a means for heating tap water, the exhaust heat from the jacket 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.

Further, as shown in FIG. 9, a circulation pipe for circulating tap water may be provided between the second water tank 27 and the jacket 30. The heating means utilizing the jacket waste heat of the spray pump such as these can realize energy saving of the cooling system and can improve cost effectiveness.

Further, instead of tap water, blow water of the cooling tower 32 of another system may be used as the cooling water, and FIG. 10 shows a configuration diagram thereof. By using the blow water from the cooling tower of another system as the cooling water, the temperature of the blow water itself is high in the season when the need to cool the condenser increases, such as in summer, so it is heated before the reverse osmosis membrane is permeated. Even if it is not done, less energy is required for transmission. When a mixed chemical of a scale dispersant, an anticorrosive agent, and an anti-slime agent is added to the water of the cooling tower, it also helps to suppress the generation of slime in the reverse osmosis membrane.

Further, 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, and a device for adding a chemical containing copper ion or silver ion. Any one device may be provided. In the process of sending the heated tap water to the washing water generator 4, by passing the tap water through the above-mentioned device, the generation of slime or algae in the reverse osmosis membrane can be suppressed, and the maintenance frequency of the device can be reduced. It can be lengthened and the cost of the cooling system can be reduced.

Further, the cleaning water used in the cooling system 100 and the cooling systems shown in FIGS. 4 to 10 was generated by permeating tap water through the reverse osmosis membrane, but instead of the cleaning water, for example, PermaClean 33 manufactured by Narco Co., Ltd. Or a scale cleaning agent such as Sunfree UK / MJ manufactured by Amtech Co., Ltd. may be used. By using these, it is possible to reduce the number of devices that generate cleaning water from tap water.

1 ... Air-cooled condenser; 2 ... Nozzle; 3 ... Spray pump; 4 ... Cleaning water generator; 5 ...
・ First pump; 6 ・ ・ Cleaning water tank; 7 ・ ・ First valve; 8 ・ ・ Second valve; 9 ・ ・ Activated charcoal filter; 10 ・ ・ Activated charcoal; 11 ・ ・ Supporting gravel; Equipment; 13 ... Pre-filter; 14 ... Heated piping; 15 ... Solar heat collector; 16 ... First water tank; 17 ... Second pump; 18 ... Subcool unit; 19 ... Refrigerator / water heat Exchanger; 20 ... Indoor unit; 21 ... Evaporator; 22 ... Expansion valve; 23 ... Outdoor unit; 24 ... Compressor; 25 ... Accumulator; 26 ... Liquid receiver; 27 ... Second Water tank; 28 ... Third pump; 29 ... Jacketed spray pump; 30 ... Jacket; 31 ... Fourth pump; 32 ... Cooling towers of other systems; 100 ... Cooling system

Claims (11)

A cooling system that cools the suction air of an air-cooled condenser with the latent heat of vaporization of a liquid.
A nozzle that atomizes and sprays liquid from the upstream side in the suction direction with respect to the suction air.
A switching device for switching between the cooling liquid for cooling the suction air and the cleaning liquid for cleaning the device existing in the spray flow path of the cooling liquid is provided. ,
Of the cooling liquid and the cleaning liquid, the nozzle atomizes the liquid switched and supplied by the switching device and sprays it from the upstream side of the air-cooled condenser in the suction direction of the suction air. ,
The cooling liquid is at least one of clean water, well water, and industrial water.
The cleaning liquid contains pure water or water having a lower concentration of impurities than the cooling liquid.
Cooling system. A cooling system that cools the suction air of an air-cooled condenser with the latent heat of vaporization of a liquid.
A nozzle that sprays a liquid against the suction air,
A switching device for switching between the cooling liquid for cooling the suction air and the cleaning liquid for cleaning the device existing in the spray flow path of the cooling liquid is provided. ,
The cooling liquid is at least one of clean water, well water, and industrial water.
The cleaning liquid is water having a lower concentration of impurities than the cooling liquid.
The switching device switches the liquid from the cooling liquid to the cleaning liquid at shorter time intervals than the time at which impurities contained in the cooling liquid adhering to the air-cooled condenser are deposited.
Cooling system. The cleaning liquid is water having a concentration of impurities lower than that of clean water, well water, and industrial water, or a cleaning agent capable of removing the impurities.
The cooling system according to claim 1. The switching device switches the liquid to be sprayed from the nozzle based on at least one of the impurity concentration of the cooling liquid and the temperature, humidity or wind speed around the condenser.
The cooling system according to claim 2 or 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 allowing the reverse osmosis membrane to permeate. Produces 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 to 40 degrees.
The cooling system according to claim 5. The heating means is a means that utilizes at least one of solar heat and 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, and a device for adding a drug containing copper ion or silver ion. A device is used to remove impurities contained in the cooling liquid.
The cooling system according to any one of claims 6 to 8. It is a cooling method that cools the suction air of an air-cooled condenser with the latent heat of vaporization of a liquid.
A spraying step of atomizing and spraying a liquid from the upstream side in the suction direction with respect to the suction air.
A switching step of switching the liquid to be sprayed between the cooling liquid for cooling the suction air and the cleaning liquid for cleaning the device existing in the spray flow path of the cooling liquid is included.
In the spraying step, of the cooling liquid and the cleaning liquid, the liquid switched in the switching step is atomized and sprayed from the upstream side of the air-cooled condenser in the suction direction of the suction air. ,
The cooling liquid is at least one of clean water, well water, and industrial water.
The cleaning liquid contains pure water or water having a lower concentration of impurities than the cooling liquid.
Cooling method. It is a cooling method that cools the suction air of an air-cooled condenser with the latent heat of vaporization of a liquid.
The spraying step of spraying a liquid on the sucked air and
A switching step of switching the liquid to be sprayed between the cooling liquid for cooling the suction air and the cleaning liquid for cleaning the device existing in the spray flow path of the cooling liquid is included.
The cooling liquid is at least one of clean water, well water, and industrial water.
The cleaning liquid is water having a lower concentration of impurities than the cooling liquid.
In the switching step, the liquid is switched from the cooling liquid to the cleaning liquid at shorter time intervals than the time when impurities contained in the cooling liquid adhering to the air-cooled condenser are deposited. Be,
Cooling method.

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