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How Does A Closed Circuit Cooling Tower Work
Views: 0 Author: jessi Publish Time: 2025-09-09 Origin: Site
Industrial closed circuit cooling towers use water as a medium to rapidly and effectively reduce the operating temperature of industrial equipment by utilizing the temperature changes caused by the cooling of water in the tower. A fully enclosed circulation system can reduce the evaporation of spray water, lower the possibility of environmental pollution, and ensure the purity of the internal circulation medium, effectively protecting the surrounding atmospheric environment.
A closed circuit cooling tower (also known as a fluid cooler) is a type of heat exchanger used to reject heat from a process or system (like HVAC or industrial equipment) without contaminating the process fluid. Unlike open cooling towers, the process fluid in a closed circuit system never comes into direct contact with the outside air.
How It Works
1. Hot Process Fluid Enters the Coil
The hot process fluid (like water or a glycol mixture) from the system enters a closed loop of coils inside the tower.
These coils are typically made of steel or copper for good heat transfer.
2. Water is Sprayed Over the Coils
A secondary water circuit (also called the spray water system) sprays water over the outside of the coils.
This water flows downward and is in contact with air, allowing evaporative cooling.
3. Air is Drawn Through the Tower
Fans pull (or push) air across the tower — typically from the bottom up or horizontally.
As the air passes over the wet coils, some of the sprayed water evaporates, pulling heat away from the coils.
4. Heat is Rejected to the Atmosphere
The evaporation of water removes heat from the coil (and thus the process fluid inside).
The cooled process fluid continues its loop back to the equipment needing cooling.
5. Spray Water is Collected and Recirculated
The unevaporated spray water falls into a basin at the bottom and is recirculated by a pump.
