Closed Loop Cooling Tower​

Closed cooling tower is an efficient and energy-saving cooling equipment, which is widely used in industry, commerce and HVAC systems. Different from the open cooling tower, the closed cooling tower exchanges heat through a closed circulation system, which avoids the direct contact between the cooling medium and the outside air.

Closed Loop Cooling Tower Video

Closed Loop Cooling Tower Principle of operation

Closed Loop Cooling Tower Features

• Corrosion resistance

     Stainless steel coil pipe:It has excellent corrosion resistance and can run stably in a variety of harsh environments for a long time.

      Freezing protection: Self-draining stainless steel heat exchange coil is convenient for freezing protection when it is shut down in winter.

• High efficiency and energy saving

      Countercurrent closed-loop circulation system:Ensure the purity of the medium, reduce the maintenance cost, and save valuable water resources while cooling efficiently.

      High-efficiency cooling all year round: It can run in winter without spraying water, and it can replace the refrigerator, significantly reducing energy consumption.

• Compact structure

      Space-saving design: Compact structure, multiple cooling towers can be combined, no pre-cooling filler is needed, and it is suitable for cooling working fluid with higher temperature.

• High quality of main components

      Stainless steel frame structure and shell: Excellent corrosion resistance and strong thermal resistance, beautiful appearance.

      Aluminum alloy axial fan: Equipped with explosion-proof motor, stable and efficient operation, the motor has IP55 protection grade and F insulation grade.

      Efficient heat exchange coil: Stainless steel coil not only has high heat exchange efficiency, but also has strong corrosion resistance, light weight, long service life, and can be recycled, which meets the requirements of environmental protection.

• Advanced functional design

      Special drift eliminator:Effectively extract water droplets in the air, with small wind resistance and capture rate of 99.99%, ensuring the best heat transfer performance.

      Air inlet grille: Easy to disassemble, with special 3D 3D 45-degree ventilation channel design, which enhances structural strength and wind load resistance, and also has anti-corrosion and anti-ultraviolet characteristics, reducing noise and requiring no maintenance.     

Closed Loop Cooling Tower Main Parts

Shell/Casing/Housing - Magnesium-aluminum-zinc coated steel sheet The zinc-aluminum-magnesium alloy coated steel sheet exhibits exceptional corrosion resistance, capable of withstanding erosion in various harsh environments. Its corrosion resistance is 10-20 times higher than that of conventional galvanized steel sheets. This material also possesses a unique self-healing capability that automatically repairs minor scratches and surface stains. Particularly at cut edges, its corrosion-resistant self-healing effect is remarkably prominent, effectively preventing rust formation at the incision areas.

Fan – Low-speed Cooling Tower Dedicated Low-noise Extrusion The fan is an extremely important component that operates in relatively harsh working environments, such as high temperatures, high humidity, and corrosion. Therefore, it is necessary to configure a specialized fan tailored to the operating conditions of the cooling tower. It is made of materials with excellent corrosion resistance, offers superior performance, can withstand high static pressure, is highly efficient and energy-saving, operates stably with high reliability, has a long fault-free runtime, and is designed for low-speed operation with very low noise levels. The fan angle is adjustable, allowing the airflow to be modified by adjusting the angle.

Fasteners Made of 304 stainless steel, they can adapt to relatively harsh operating environments, making them an ideal cooling tower construction material resistant to changing environmental conditions. They also withstand aging caused by ultraviolet rays, offer strong corrosion resistance, and ensure the overall service life of the equipment.

Cooler The cooler is a key component of the cooling tower. It circulates a cooling medium internally, while externally it is cooled by air (air cooling) and water spray (water cooling) to meet cooling requirements. The cooler is made of 304 stainless steel, offering high-strength corrosion resistance. For this project, the cooler features an anti-freeze design and consists entirely of bare round tubes without fins to ensure its cooling efficiency. The welding points between the tubes and elbows are consistent with the original tubing.

Spray Pipe Made of U-PVC pipe, it offers improved pressure resistance, sun exposure resistance, impact resistance, and corrosion resistance to chloride ions. It meets the requirements for heavy salt spray corrosion.

Water Collector The water collector is a critical component in preventing water drift in cooling towers. A high-performance water collector not only saves water but also improves the surrounding environment of the tower, extends the service life of the fan, and prevents safety hazards caused by drifting water freezing in winter. Our company uses an efficient water collector, which has been tested in actual towers, achieving a water drift loss lower than the standard of national brands, ensuring that the cooling tower's drift rate does not exceed 0.01%.

Cooling Tower Fill The cooling tower packing is made of virgin PVC sheets, offering excellent resistance to cold and freezing, superior hydrophilicity, thermal performance, and corrosion resistance. The packing sheets are flame-retardant materials. Moreover, they excel in resisting decay, attenuation, or biological damage, making them the best in the heat exchange industry with a long service life. The precooling packing is vacuum-formed PVC, featuring integrated air-guiding louvers and a water collector, with a large heat dissipation area, high thermal performance, and excellent water collection and air-guiding effects.

Closed Loop Cooling Tower Prameter

Note :The specific parameters and dimensions shall be in accordance with our proposed solution.

Closed Loop Cooling Tower Optional Auxiliary Equipment and Accessories 

Circulating Water Pump / Control Cabinet System / Water Tank / Stainless Steel Housing and Frame / Fasteners (304/316L) / Dual-speed Motors and Variable Frequency Motor Anti-freeze Heaters

Closed Loop Cooling Tower Factory Show

Closed Loop Cooling Tower Certificate

Closed Loop Cooling Tower Application

 Widely used in the following industries: energy industry, pharmaceutical industry, HVAC (heating, ventilation and air conditioning), chemical industry, machinery manufacturing, metal processing, plastic products, industrial cooling, food processing.

Closed Loop Cooling Tower Project Performance

Closed Loop Cooling Tower Maintenance Precautions

1. Maintenance of equipment：

Regularly clean the dust, oil stains, and other debris on the outer shell, and also remove the scale on the heat exchange coil. Regularly clean the spray filter. The scaling material is the biggest influencing factor on the heat dissipation effect of the heat transfer coil.

2. Water quality management and maintenance：

Due to the good heat dissipation effect inside the heat exchange coil and long-term exposure to hot water circulation, it is relatively easy to scale. Therefore, soft water must be used for the internal water of the heat exchange coil. The outer layer of the cooler is sprayed with a spray pump, and the spray water is tap water. If it frequently comes into contact with hot copper pipes, scaling will definitely occur, and it should be regularly cleaned.

3. Maintenance and upkeep of pumps：

① The inlet pipe must be highly sealed;

② The imported pipeline must be filled with liquid, and the pump is prohibited from running for a long time in a cavitation state;

③ Regularly check the current of the motor and ensure that it does not exceed the rated current of the motor;

④ The pump should be supervised by a dedicated person during operation to prevent accidents;

⑤ It is strictly prohibited to arbitrarily turn off the cooling water supply during high temperature operation;

⑥ After long-term operation of the pump, if the noise and vibration of the unit increase due to mechanical wear, it should be stopped for inspection. If necessary, vulnerable parts and bearings can be replaced. The maintenance period of the unit is one year.

4. Maintenance and upkeep of mechanical seals inside the pump：

① Mechanical seal lubrication should be clean and free of solid particles;

② Mechanical seals are strictly prohibited from working under dry friction conditions

③ Before starting, the pump (motor) should be turned a few times to avoid damaging the seal when suddenly started.

Closed Loop Cooling Tower FAQ

A closed circuit cooling tower isolates the cooling medium from air via a sealed coil heat exchanger, with spray water circulating only outside the coil to cool it, preventing water contamination. An open tower directly exposes circulating water to air, making it more susceptible to environmental impact and higher water consumption.

It’s necessary to determine the cooling medium type, flow rate, inlet/outlet temperature requirements, ambient temperature and humidity, and installation space constraints. We can provide customized services.

Ensure good ventilation, keep away from heat sources/dust, verify foundation load-bearing capacity, reserve maintenance space, and strictly follow the manual for piping and electrical connections.

Install electric heaters, adjust spray water volume, add antifreeze, or switch to dry operation mode (fan-only cooling).

Regularly clean the coil and spray system, check the fan/pump operation, replenish spray water, clean the filter, and inspect the anti-corrosion coating.

Minimum order quantity (MOQ): 1 unit; Warranty: 12 months.