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A closed circuit cooling tower, also known as a hybrid cooling tower, is one of the types of industrial heat exchangers that can be effectively used in various industries to complete the water cooling process. Water consumption and evaporation volume in a closed circuit cooling tower are much lower than in an open circuit type. In a hybrid cooling tower or combined cooling tower, water flows in a fully closed cycle inside copper tubes or coils and is cooled through contact with air and secondary water spray. The dimensions and main body of open and closed circuit cooling towers are the same; the difference lies in the water circulation mode inside the tower. In an open circuit cooling tower, water is sprayed onto the packing by nozzles, whereas in a closed circuit cooling tower, water flows inside the radiator or coil. Water evaporation and wastage are much higher in the open circuit type compared to hybrid or closed types. Azin Tahvieh designs and manufactures open and closed circuit hybrid cooling towers - 09194201355
Below are the main components of a closed circuit cooling tower: • Heat exchange coil: Contains the process fluid that, by separating the process fluid from the environment, prevents contamination and transfers heat from the process fluid to the coil. Closed circuit cooling tower coils are made of copper or galvanized tubes. Copper coils are used in most Azin Tahvieh production towers due to better efficiency. Thermal coils are designed and manufactured in 6 to 10 rows. • Water spray system: Includes a pump that sprays water from the basin towards spray nozzles and distributes water over the heat exchange coil. Spiral, square spray, and elbow nozzles are used in Azin Tahvieh cooling towers. • Airflow system: Includes fans to direct heat outside the tower chamber, fan motors to move fan blades, and air intake louvers to guide fresh air into the cooling tower and reduce debris and pollution entry. Closed circuit cooling tower fans are designed as axial or centrifugal, with materials such as aluminum, fiberglass, and polyamide depending on the type. • Drift eliminators (cooling tower droplet separators): Prevent water droplets from exiting with the outgoing air, reducing water loss and environmental impact. Using appropriate droplet eliminators at the tower outlet is an effective solution to reduce water wastage. Droplet eliminators are produced in blade and honeycomb models. • Basin: Collects cooled water from the spray system for recirculation. • Water distribution system: Includes shower pumps and piping from the basin to nozzles, ensuring uniform water flow to spray nozzles. • Body and frame: Enclose and support cooling tower components, usually made of corrosion-resistant materials such as galvanized steel, stainless steel, or fiberglass. Currently, Azin Tahvieh uses fiberglass (a combination of needle and mat fibers with resin) for manufacturing the body, basin, fan stack, and cooling tower panels. • Control system: Includes thermostats, fan controls, and other equipment for monitoring and optimizing performance. • Access panels: Allow inspection, cleaning, and maintenance of internal parts.
The closed circuit cooling tower system, due to the features mentioned above, has specific advantages. Therefore, it is more commonly used in arid and desert regions. Some main advantages of this type of cooling tower are:
Regarding disadvantages of dry cooling towers, one can mention the limitation of fluid temperature reduction to the ambient dry bulb temperature, which causes this system to have lower efficiency in cooling water at low temperatures compared to open circuit towers.
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| Company | آذین تهویه |
|---|---|
| Tel | +98 21-0×××4201355, +98 21-0×××4201355 |
| Mobile | +98 919×××1355 |
| Whatsapp link | |
| Instagram page | |
| Website | https://www.azintahvie.com/ |
| Country | Iran |
| Province | Tehran |
| Address | دفتر مرکزی: تهران، بلوار دریا، خ مطهری جنوبی، نبش 18 |
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