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Closed-Loop Cooling Towers

Closed-loop cooling systems with adiabatic pre-cooling for efficient heat rejection in demanding ambient conditions, helping reduce water consumption while maintaining reliable process cooling.
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Introduction

Atcorp offers closed-loop cooling tower solutions that combine dry cooling with adiabatic pre-cooling for applications exposed to high ambient temperatures. Process fluid remains inside copper-tube coils while adiabatic pads cool the incoming air when additional heat-rejection capacity is required, providing a practical balance between cooling performance and water conservation.

Key Benefits

Adiabatic Pre-Cooling
Hot-Weather Performance
Low Maintenance
Reduced Water Consumption
Copper Coil Heat Exchanger
Low-Noise Option

Why Choose Closed-loop Cooling Towers?

Conventional evaporative cooling towers continuously use water to reject heat, while dry coolers can lose cooling effectiveness as ambient temperatures increase. Closed-loop cooling towers combine both approaches: they operate as dry coolers under suitable conditions and use adiabatic pre-cooling when additional cooling capacity is needed. This provides reliable heat rejection while reducing water consumption
Specification Details
Cooling Principle Closed-Loop Dry Cooling + Adiabatic Pre-Cooling
Process Circuit Closed Loop
Primary Cooling Mode Dry Cooling
Additional Cooling Adiabatic Air Pre-Cooling
Heat Exchanger Extended-Fin Copper Tube Coil
Coil Construction Level-Wound Copper Tubing
Tube Design Hairpin Bends
Headers Heavy-Wall Steel
Airflow Fan-Driven
Fan Type Low-Noise Axial Flow
Adiabatic System Pre-Cooling Pads
Water Consumption Demand-Based
Enclosure Fibreglass / GI
Model Range ADCT 80 – ADCT 320
Low-Noise Version Available
Installation Industrial / Outdoor

A closed-loop cooling tower normally operates as a dry cooler and activates adiabatic pre-cooling when ambient conditions require additional heat-rejection performance.

 

Step 1 – Hot Process Fluid Entry
Hot process fluid enters the closed copper-tube heat exchanger.

 

Step 2 – Ambient Air Intake
Axial fans draw atmospheric air toward the finned heat-transfer coils.

 

Step 3 – Dry Cooling
Under suitable ambient conditions, air passes directly across the coils and removes heat from the process fluid.

 

Step 4 – Adiabatic Activation
When ambient temperatures increase, the adiabatic pre-cooling system is activated.

 

Step 5 – Air Pre-Cooling
Water evaporates from the pre-cooling pads, reducing the temperature of the incoming air.

 

Step 6 – Enhanced Heat Rejection
The cooler air passes over the copper coils, increasing the temperature difference available for heat transfer.

 

Step 7 – Process Fluid Cooling
Heat is transferred from the closed-loop process fluid into the air.

 

Step 8 – Continuous Operation
The system can continue operating in dry or adiabatically assisted mode according to cooling demand.

Closed-Loop Process Cooling

The process fluid remains inside the copper coil, helping protect it from atmospheric contamination.

 

Adiabatic Cooling Boost

Pre-cooling pads lower incoming-air temperature during hot weather, improving heat rejection when dry cooling alone becomes less effective.

 

Reduced Water Consumption

Unlike fully evaporative cooling towers, the system does not continuously evaporate water during normal dry operation.

 

Efficient Copper Coil Heat Transfer

Level-wound copper tubing with extended fins provides a large heat-transfer surface within a compact arrangement.

 

Lower Contamination Risk

The process fluid is isolated from the adiabatic water and atmospheric environment.

 

Reduced Wet-System Maintenance

Because the tower can operate as a dry cooler for much of its operating time, dependence on continuously wet components is reduced.

 

Hot-Weather Reliability

Adiabatic pre-cooling provides additional heat-rejection capability when ambient temperatures are high.

 

Low-Noise Configuration

A low-noise model is available for installations where operating sound levels are a consideration.

Heat Exchanger

  • Imported copper tube coils
  • Extended-fin construction
  • Level-wound coil design
  • Hairpin bends
  • Heavy-wall steel headers
  • Reduced number of joints
  • Closed process-fluid circuit

 

Adiabatic System

  • Pre-cooling pads installed ahead of the coil
  • Evaporative air pre-cooling
  • Demand-based water usage
  • Enhanced hot-weather performance

 

Airflow System

  • Axial flow fans
  • Electric motor-driven airflow
  • Low-noise configuration available
  • Airflow directed across finned copper coils

 

Tower Construction

  • Fibreglass/GI enclosure
  • Corrosion-resistant construction
  • Industrial outdoor configuration
  • Closed-loop process cooling arrangement

Industrial Applications

Closed-loop cooling towers are suitable for industrial processes requiring reliable heat rejection, particularly where high ambient temperatures and water conservation are important.
Data Centers
Supports heat rejection for cooling infrastructure while providing an option for reducing dependence on continuously evaporative systems.
Industrial Process Cooling
Provides closed-loop cooling for machinery, heat exchangers and other continuous industrial processes.
Pharmaceutical Manufacturing
Helps maintain process-fluid separation where cleanliness and controlled cooling are important.
Food & Beverage Processing
Provides indirect process cooling while keeping the process circuit isolated from the cooling environment.
Power & Utility Systems
Can be used for selected heat-rejection applications where water conservation and reliable cooling are priorities.

Frequently Asked Questions

Find answers about closed-loop cooling towers, adiabatic pre-cooling, water consumption, operation, construction and industrial applications.
A closed-loop cooling tower is a heat-rejection system in which process fluid remains inside a closed heat-transfer coil. In this configuration, dry cooling is supplemented by adiabatic pre-cooling when additional cooling performance is required.
Hot process fluid passes through copper coils while fans move ambient air across the coils. During high ambient conditions, water evaporating from adiabatic pads cools the incoming air before it reaches the heat exchanger, increasing heat-rejection performance.
No. The system primarily operates as a dry cooler. Water is used for adiabatic pre-cooling when additional cooling performance is required, rather than continuously for heat rejection.
Yes. The referenced range includes a low-noise model for applications where operating noise is a key consideration.
Selection should consider process heat load, fluid flow rate, inlet and required outlet temperature, ambient dry-bulb and wet-bulb conditions, operating hours, water availability and installation space.
Yes. Atcorp can help Indian industrial customers evaluate their process cooling requirements and identify a suitable closed-loop cooling tower configuration based on heat load, operating temperatures, ambient conditions and water-consumption priorities.

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