Closed Circuit Water Cooling Tower Operation Principle

How does closed loop water cooling towers work ?

Closed systems are preferred in processes that need clean water that is sensitive to pollution. The water that is required to remain clean is cooled while passing through the serpentines in the closed type tower. In order to provide cooling in this way, while hot water is passed through the metal pipe, the cold air absorbed by the tower fan and the circulation water of the tower cool the water inside from the pipe surface.

Is there any evaporation loss in closed type cooling towers?

There is some evaporation loss in the spray water sprayed in closed type cooling towers.

Does a closed typecooling tower work like a dry cooler?

Closed type towers can be operated as a dry cooler by turning off the spray water in cold seasons and using only air suction. Thus, water loss can be reduced to zero. In order to provide cooling like a dry cooler (free cooling), the heat exchanger in the tower must be mounted on the air intake vents of the tower. In some models sold on the market, the cooling exchanger is mounted under the air suction vents; dry operation mode will not be effective in such towers.

How to prevent heat exchanger freezing in a closed loop cooling tower?

During winter, the fluid in the cooling tower exchanger may freeze and damage metal pipes when the tower is stopped. For example, holidays, weekends and maintenance periods are particularly risky times. There are several methods to prevent this;

• If the cooling process needs to be stopped for a long time, the water in the exchanger can be drained through the drain valve.

• Even if the process is stopped, the fluid in the exchanger can be circulated at low speed to ensure movement and prevent freezing.

• By adding antifreeze fluid such as ethylene glycol to the cooling fluid, the freezing point can be lowered and freezing can be prevented.

What is the electricity consumption in a closed circuit cooling tower?

In this type of towers, the fan motor and pump motor consume electricity. The towers we produce as Ensotek minimize our customers' operating costs by providing low electricity consumption. Closed-loop cooling towers operate with 8 - 10 times lower consumption than chiller groups under all conditions.

In the diagram below, the operation of a closed loop cooling tower is shown with an animation.

Gallery