Closed-circuit cross-flow double-sided air intake cooling tower

### Closed-circuit Cross-flow Double-sided Air Inlet Cooling Tower

In modern industrial cooling systems, cooling towers serve as crucial equipment, playing a vital role in discharging waste heat generated during processes into the atmosphere. Among various types of cooling towers, closed-circuit cross-flow double-sided air inlet cooling towers stand out due to their efficiency, energy saving, and environmental friendliness, making them the preferred choice in numerous industrial fields. This article will provide a detailed introduction to the working principle, structural features, performance advantages, and application examples of closed-circuit cross-flow double-sided air inlet cooling towers, aiming to provide reference and guidance for related industries.

#### 1. Working Principle

The core of a closed-circuit cross-flow double-sided air inlet cooling tower lies in its unique heat exchange mechanism. Unlike traditional open cooling towers, closed-circuit cooling towers utilize a closed-loop water system, where the circulating water does not directly contact the outside air within the tower. Instead, it undergoes indirect heat exchange through high-efficiency heat dissipation fillers and air. During operation, hot circulating water flows from the top of the tower, evenly distributed on the heat dissipation fillers to form a film. Simultaneously, the fan drives external air to flow horizontally across the heat dissipation fillers from both sides of the tower (double-sided air inlet design), utilizing the temperature difference between the air and the water film to transfer heat. The cooled water is then collected by the collection tank and sent back to the process system for reuse by the water pump, while the air carrying the heat is discharged through the top of the tower.

#### 2. Structural Features

The structural design of closed-circuit cross-flow double-sided air inlet cooling towers fully considers the needs of efficient heat dissipation and energy conservation and environmental protection, mainly reflected in the following aspects:

1. **Double-sided Air Inlet Design**: Air inlets are set on both sides of the tower body, forming a cross-flow air flow path, effectively increasing the contact area between the air and the heat dissipation filler, improving heat exchange efficiency. At the same time, the double air inlet design helps to balance the airflow in the tower, reducing energy consumption.

2. **High-efficiency Heat Dissipation Filler**: The heat dissipation filler uses special materials and structures to maximize the water film surface area, promoting heat exchange between water and air, while reducing water flow resistance and maintaining efficient operation of the circulating pump.

3. **Closed-circuit Water System**: It avoids water pollution and evaporation loss, reduces the demand for water replenishment and water treatment costs, and protects the environment.

4. **Intelligent Control System**: It integrates temperature sensing, humidity monitoring, and fan frequency regulation functions. It automatically adjusts the cooling tower's operating status according to external environmental conditions to achieve optimal energy consumption.

#### 3. Performance Advantages

1. **High Efficiency and Energy Saving**: Through optimized design and intelligent control, closed-circuit cross-flow double-sided air inlet cooling towers can significantly reduce energy consumption by about 20%-30% compared to traditional open cooling towers, resulting in lower long-term operating costs.

2. **Environmentally Friendly**: The closed-loop circulation avoids direct consumption of water resources and environmental pollution, conforming to the concept of green and sustainable development.

3. **Easy Maintenance**: The compact structure and easily inspected and replaced components reduce maintenance difficulty and cost.

4. **Strong Adaptability**: It maintains good cooling performance in both dry and humid climates and is suitable for various industrial applications.

#### 4. Application Examples

Closed-circuit cross-flow double-sided air inlet cooling towers are widely used in power generation, chemical, metallurgical, pharmaceutical, and data center industries. For example, in large data center cooling systems, using this type of cooling tower can effectively control the high temperatures generated by server heat dissipation, ensuring the stable operation of the data center while reducing energy consumption and operating costs. In the chemical industry, facing corrosive media and high-temperature and high-pressure environments, closed-circuit cooling towers, with their excellent corrosion resistance and stable operating status, have become indispensable cooling equipment.

#### 5. Conclusion

In summary, closed-circuit cross-flow double-sided air inlet cooling towers, with their high efficiency and energy saving, environmental friendliness, ease of maintenance, and wide applicability, have demonstrated enormous potential and value in the field of modern industrial cooling. With continuous technological advancements and expanding application fields, closed-circuit cooling towers will become an important force in promoting green industrial development and achieving energy efficiency and emission reduction goals. In the future, with the integration of intelligent and modular technologies, the performance of closed-circuit cooling towers will be even more superior, bringing revolutionary changes to industrial cooling.