Selection of cooling towers

Low noise, energy-saving, water-saving, stable cooling performance, and minimal maintenance requirements. 1. Excellent energy-saving and cooling effects: In the new type of spray-driven ventilation cooling tower, heat exchange between hot water and cold air takes place in a misty condition, and the \"top spraying\" method is used; as a result, water droplets can exchange heat and mass with the cold air both during their upward and downward movement, thereby increasing the distance over which heat exchange occurs. Additionally, the watering screen separates the air intake area from the tower body, preventing interference from return air and various spray devices, and it also generates secondary induced airflow from the spray stream. The combination of mechanical exhaust and induced draft increases the gas-to-water ratio. Coupled with low wind resistance within the tower, as well as a proper layout of the air ducts and water spraying devices, the new type of spray-driven ventilation cooling tower achieves excellent cooling effects. According to on-site measurements, when the cooling water treatment capacity of the cooling tower is 100 tons per hour, the dry-bulb air temperature is 33°C, the wet-bulb temperature is 25°C, and the water pressure entering the tower is 0.1 Mpa, the inlet water temperature is 34°C while the outlet water temperature is 28°C, resulting in a temperature drop of 6°C. Its cooling effect is significantly better than that of traditional fiberglass filler cooling towers. 2. Stable cooling performance: Since the new type of spray-driven ventilation cooling tower is free from problems such as filler clogging and fan damage, the spraying system operates reliably. The nozzle has a large diameter, making it less prone to clogging; it has no special requirements regarding the quality of the cooling water, and the watering screen is easy to clean. Therefore, the cooling performance of the new type of spray-driven ventilation cooling tower during operation is naturally more stable than that of traditional fiberglass filler cooling towers. 3. Low operating water pressure and energy efficiency: The rated operating water pressure of the new type of spray-driven ventilation cooling tower is 0.1 Mpa. When the water pressure drops to 0.06 Mpa, only the flow rate of the cooling water entering the cooling tower changes, resulting in a reduction in cooling capacity; however, the cooling effect of this new type of tower remains unchanged. Due to the low-mounted position of the spraying device, and the fact that the operating water pressure of this device is lower than that of the water distribution nozzles in traditional fiberglass-filled cooling towers, the outlet head pressure of the circulating cooling water pump is reduced. Additionally, the exhaust fan used in traditional fiberglass-filled cooling towers has been eliminated, which saves energy consumption related to fans. As a result, the energy-saving effects of the new type of spray-driven ventilation cooling tower are evident. 4. Low noise: The new spray-driven ventilation cooling tower eliminates the electric exhaust fan found in traditional fiberglass-filled cooling towers, thereby removing the noise source associated with those cooling towers. The hydraulic fan of the spray-driven ventilation cooling tower itself generates very little noise; therefore, the noise of the new type of spray-driven ventilation cooling tower mainly comes from the sound of water spraying inside the tower. Since the spraying device operates by injecting water at low pressure from above, the water droplets fall freely through the air in the cooling tower due to gravity. Additionally, the water spray noise generated by these droplets is further reduced thanks to the decelerating and noise-reducing effect of the water spray screen. According to on-site measurements, the noise level of the new spray-driven ventilation cooling towers is generally below 60 dB; various simple measures can also be taken to reduce the sound of water spraying in order to further lower the noise level. Therefore, the new type of spray-driven ventilation cooling tower is particularly suitable for use in places such as hotels, restaurants, hospitals, theaters, schools, as well as enterprises and institutions located in residential areas, where low noise levels from cooling towers are required. 5. Low water splashing, significant water-saving effect: The new type of spray-driven ventilation cooling tower eliminates the exhaust fan that is usually located at the top of conventional cooling towers. The tower structure can be designed more reasonably based on fluid dynamics principles, effectively reducing the phenomenon of water splashing that occurs in traditional fiberglass filler cooling towers. Equipped with a high-performance water collector at the top, the new type of spray-driven ventilation cooling tower can minimize water drift. The cooling effect can be adjusted: For a new type of spray-driven ventilation cooling tower of a given model, to increase its cooling capacity, it is sufficient to appropriately replace the spray device installed inside the tower and make slight adjustments to the supply pressure of the cooling water entering the tower. 6. Less maintenance required, reducing production costs: The new type of spray-driven ventilation cooling tower does not have electric fans or fillers that need to operate in humid and hot environments for extended periods; it is easy to clean and maintain, resulting in fewer maintenance tasks. The nozzle of the atomization device has a large diameter, making it less prone to clogging. During annual maintenance, it is only necessary to replace the damaged bearings and seals of the spraying devices, as well as to clean and replace the screens, which significantly reduces the operating costs for users. 7. The new type of spray-driven ventilation cooling tower features a modular structure based on building blocks. Moreover, the air inlets and outlets inside the tower are separated at the lower part of the tower, which simplifies its structure, reduces its weight, and facilitates transportation and assembly.

May I ask the expert on the 2nd floor: Is this type of cooling tower suitable for high-temperature (80°C) oily media? Also, what is a good installation method for the motor? ? Our facility originally used motors mounted vertically above the air duct openings, but due to harsh operating conditions, the motors would often burn out.

Compared to packed towers, this type of tower cannot be designed as a tower with a large temperature difference; the temperature drop is generally within 10°C, which limits its application. The advantage is that for water with suspended solids, since the packing is eliminated, the resistance of the tower does not increase due to packing scaling, thus avoiding impacts on cooling efficiency ； With the filler removed, the resistance of the tower is low, allowing the fan to handle a larger volume of air. The presence of oil in the water does not affect its use. For your situation, a fan with an inverted installation inside the tower should not be used; instead, a fan driven by a motor located outside the tower should be chosen. In this case, the motor is outside the air duct, with only a horizontal reducer inside the tower.

Since our company has not used this type of hollow cooling tower before, we lack practical experience in its use. When communicating with the manufacturer, they only mention the advantages and avoid talking about the disadvantages. There are still a few things I’m not clear about: 1. Is the reducer prone to failures? Is the lubrication reliable? 2. Is the nozzle prone to clogging? Does it need to be replaced frequently? (What we deal with is not ordinary water, but wastewater containing oil and impurities.) 3. For water towers with a smaller treatment capacity, there are no dedicated maintenance doors; so how can one get inside?

1. The failure rate of reducers depends on the manufacturer chosen; brands from unreputable small manufacturers are less reliable, while those from reputable large manufacturers are more dependable； 2. The nozzles are not prone to clogging; of course they need to be replaced if damaged, but the quantity required is not large and the price is not high ； 3. Since there is no filler, air can enter the tower directly through the inlet at the bottom; the nozzles are located there, slightly above the lower edge of the panel (the spray pipes). This post was last edited by cyxcz on 2008-11-29 18:38]

Go and visit the manufacturer; here is an address: Ulasan Fertilizer Factory in Inner Mongolia

Compared to packed towers, air-jet towers are more suitable for dirtier media. However, the nozzle must be designed to facilitate cleaning and replacement.

The nozzles are still easy to replace; each nozzle has four small bolts.

Thank you all for your help above; now I have a clear idea