By evaporating water, cooling towers remove the heat generated in an industrial or refrigeration cycle and lower the temperature of the cooling fluid to approximately the temperature of the wet bubble of the installation site.
In simpler terms, a cooling tower is a system that is used for water cooling in the cooling processes of air conditioning systems, industry, refineries, power plants, etc.
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Cooling towers can be divided from different perspectives as follows
Open circuit cooling towers: in fact, they are the usual cooling towers of air conditioning systems in which the heat transfer fluid is cooled after entering the tower and spraying on the packings (which increases the contact surface with the airflow inside the tower) and After pouring and collecting the water in the lower pan of the tower, it is returned to the heat exchange cycle in the air conditioning system by the pump.
Closed-circuit cooling towers: In closed-circuit cooling towers, the cooling fluid of the system enters the closed-circuit coils of the tower through a pipe and is cooled indirectly without interfering with water or air by dropping water on the coils.
In general, cooling towers can be examined and selected in terms of the following:
- Body material (galvanized - fiberglass - concrete)
- Airflow suction method (natural-forced)
- How air and water flow meet (cross flow and opposite flow)
- Water distribution system (nozzle-pan-turning arms)
- Appearance (bottle-cubic)
- Type of operation (open circuit and closed circuit cooling towers)
Tips for choosing a cooling tower
- Since the cooling towers are located in an open environment and exposed to direct sunlight, a proper coating of gel coat Neopentyl Glycol (NPG) is required to protect the tower body against the ultraviolet rays of the sun.
- Considering that all the internal parts of the cooling tower are always in direct contact with water, in order to prevent rusting and rotting of the metal parts of the cooling tower, make sure that all the main parts such as the structure and secondary parts (screws, nuts, etc.) ..) are made of stainless steel or iron with a hot galvanized coating.
- The water cooling surfaces (packings) inside the cooling tower should be selected from the appropriate design and material. The packings are usually made of PVC or PP sheets with antibacterial pharmaceutical grade and 400 microns thick.
- In order to increase the lifespan of the electric motor and reduce the fan noise when starting the cooling towers, ensure the static and dynamic balance of the tower fan.
- When ordering cooling towers with high capacities, it is better to use a power transmission system equipped with a gearbox.
- In order to change the speed of the cooling tower motors, the inverter system can be used in these devices.
- It is necessary to install a ladder for easy access to different parts of the tower, including the electric motor, etc., as well as maintenance in high capacities.
- To increase the useful life of the packings and prevent their sedimentation, a hardener can be used in the way water enters the tower.
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final word
In order to check and choose the cooling tower needed by your industry or project, you can contact the experts of the air conditioning equipment department in the DamaTajhiz specialized complex through phone number +9821-88822550 during office hours.
Related Articles
In order to get more information, it is recommended to read the articles related to the article on how to choose the best cooling tower.
- Water pipes arrangement of cooling tower
- Methods and principles of cooling tower maintenance
- Everything about industrial chiller
- Fiberglass cooling tower
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