Industrial Closed Circuit Cooling Tower

An industrial closed circuit cooling tower (also called a closed loop cooling tower) is a type of cooling equipment used to reject heat while keeping the process fluid (water, glycol, oil, etc.) completely enclosed and uncontaminated.

How Industrial Closed Circuit Cooling Tower Works:

1. Industrial Closed Circuit Cooling Tower Primary Circuit (Closed Loop):

The process fluid circulates inside a coil (heat exchanger).

It never comes into direct contact with outside air, which prevents contamination, scaling, and evaporation losses.

2. Industrial Closed Circuit Cooling Tower Secondary Circuit (Open Loop):

   Water is sprayed over the outside of the coil.

   A fan draws air through the tower, causing evaporation of some of the spray water, which cools the coil and the process fluid inside.

3. Industrial Closed Circuit Cooling Tower Recirculation:

   The cooled process fluid is returned to the system (chillers, machinery, compressors, etc.).

   The spray water is recirculated, with a small portion bled off to control cycles of concentration.

Industrial Closed Circuit Cooling Tower Key Features:

Coil Heat Exchanger: Galvanized steel, copper, or stainless steel.

Fan System: Induced or forced draft, axial or centrifugal.

Water Distribution System: Spray nozzles above the coil.

Drift Eliminators: Reduce water loss through carryover.

Basin & Pumping System: Collects and recirculates spray water.

Industrial Closed Circuit Cooling Tower Advantages:

Keeps process fluid clean and uncontaminated

Reduces fouling, scaling, and corrosion in the system

Lower water treatment cost compared to open towers

Can use glycol solutions for freeze protection

Suitable for industrial, HVAC, and process cooling applications

Industrial Closed Circuit Cooling Tower Applications:

Chemical and petrochemical plants

Power generation

Steel and metal processing

Data centers

Large HVAC systems

Food & beverage and pharmaceutical industries

Here is a labeled diagram of an industrial closed circuit cooling tower