Closed-loop cooling tower

Closed cooling tower

Product Overview

Closed cooling towers are categorized into: Crossflow Closed Cooling Towers, Counterflow Closed Cooling Towers, and Compound Flow Closed Cooling Towers.

Principle of Reverse Flow Closed Circuit Cooling Towers

High-temperature working fluid enters the cooling coil, where waste heat is exchanged with falling spray water through the coil wall, creating a saturated, humid air mixture. Heat is expelled by the top-mounted fan, while moisture is redirected back to the collection trough by a special dehydration unit for recirculation.

Product Features

1. Compact structure

Compared to other models, the internal design of the counterflow closed cooling tower typically does not use packing material, resulting in a more compact structure and reduced footprint, thus meeting the customer's space requirements. If the customer has special requirements for packing material, we can offer non-standard customized models with packing material.

2. High Efficiency

Uniform air volume distribution, minimal heat dissipation blind spots, and high heat exchange efficiency; the high wind drum design ensures that the equipment's operating air volume meets the heat dissipation requirements.

3. Auxiliary Equipment Matching

For certain small-scale cooling projects, we integrate the cooling tower with the circulating pump station system and the control system, creating a complete integrated unit that is convenient for users to install and operate.

Principle of operation for a horizontal closed-loop cooling tower

High-temperature working fluid enters the cooling coil, where waste heat is exchanged with the falling spray water through the coil's outer surface, creating a heat and mass transfer. This results in a vertical alternation of dry cold air entering from the side with saturated moist air. Heat is expelled by the top fan, while water is recirculated back to the collection basin using a special dehydration structure. Unlike counterflow cooling towers, the spray water in a crossflow closed-loop cooling tower is pre-cooled by PVC packing, significantly enhancing its heat exchange efficiency.

Product Features

1. Low noise

PVC filler enhances work efficiency while reducing water drop noise. The fan utilizes low-speed, wide-span aviation wing blades to lower the noise level.

2. Non-scaling

The spray water temperature can be controlled below the temperature prone to scaling, smoothly flowing over the surface of the heat exchange tubes, creating a completely wetted and covered surface, effectively preventing scaling.

3. Easy maintenance

Modular assembly for easy installation, disassembly, and maintenance.

The interior space features a service walkway, with a maintenance railing and ladder on top, facilitating easy access and maintenance for personnel.

The working principle of a composite flow closed-loop cooling tower

High-temperature working fluid flows through the coils, with the coil exterior enveloped by spray water. Heat from the fluid is transferred through the tube walls, creating saturated steam with water and air. The heat is then exhausted into the atmosphere by a fan. The spray water, during its recirculation, is cooled through PVC finned radiators, forming a concurrent airflow with fresh air. The coils primarily rely on moist heat conduction. A key feature of the composite closed-loop cooling tower working principle is its ability to effectively inhibit the formation of scale on the coil exterior.

Product Features

1. Excellent cooling performance

The intake window allows for bidirectional air flow from the top, ensuring ample dry cold air comes into contact with the spray water, resulting in high cooling efficiency.

2. Scale Prevention

The cooler is positioned above the packing, with the inflow and exhaust air flowing in the same direction as the spray water, effectively preventing dry spots. The spray water completely covers the exterior of the tubes, preventing scale buildup at the dry spots.

3. Low noise operation with a low-speed, wide-blade fan. Vulnerable parts are from renowned brands, featuring low failure rates and low maintenance costs.

4. High-velocity exhaust system for effective ventilation, rapid heat dissipation, and guaranteed cooling performance.

5. Easy maintenance

Modular assembly for easy installation, disassembly, and maintenance.

The interior space features a service walkway, facilitating easy access for maintenance personnel to inspect and repair.

6. Dual-air intake system

The dual-air intake system cooling tower features both finned tubes and coil arrangements on both sides, with oversized fan housing to maximize air flow, resulting in excellent cooling performance.