Evaporative Condenser

The evaporative condenser is a common name for what’s actually known as a closed cooling tower. In essence, it’s simply a closed cooling tower that uses the evaporation of sprayed water—carried away from the tower by air—to cool and transfer heat to the circulating medium inside the heat exchange tubes. Notably, this circulating medium remains completely isolated from the external environment. Because the circulating medium is entirely sealed off from the outside world, it’s sometimes referred to as an evaporative condenser. Inside, the circulating medium is cooled only—there’s no consumption or evaporation involved. As the spray water on the exterior of the heat exchange tubes evaporates, the resulting water vapor mixes extensively with the surrounding air, significantly increasing humidity levels. This saturated, high-humidity, high-environmental-airflow is then expelled from the tower into the surrounding environment by axial fans.

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Evaporative condenser

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Evaporative Condenser

Overview

The evaporative condenser is a common name, also known as a closed cooling tower.

Actually, it’s simply a closed cooling tower that uses the evaporation of spray water—carried away from the tower by air—to cool and transfer heat to the circulating medium inside the heat exchange tubes. Importantly, the circulating medium remains completely isolated from the outside environment.

Because the cooled circulating medium is isolated from the outside environment and completely sealed, it is sometimes referred to as an evaporative condenser. The internal circulating medium is only cooled—there is no consumption or evaporation involved.

After the spray water on the outside of the heat exchange tubes vaporizes, a large amount of water vapor mixes with the air, increasing humidity. An axial fan then draws this saturated, high-humidity, high-enthalpy air out of the tower and into the surrounding environment.

Work process

► Latent heat of vaporization: Similar to closed cooling towers, it relies on the evaporation of spray water outside the heat exchange tubes, absorbing the latent heat of vaporization and carrying away the thermal energy from the industrial circulating water flowing inside the sealed heat exchange tubes.

► Plate heat exchange: Spray water and air are completely isolated from the circulating medium, with no direct contact—only heat transfer occurs, ensuring no physical contact between them.

Main Advantages

► No evaporation: It only cools without any evaporation or consumption. The circulating medium is completely isolated from the outside air, ensuring no direct contact whatsoever. This prevents both evaporation and the entry of impurities, thereby maintaining the stability of the internal medium's composition.

► No scaling occurs: Since there is no evaporation, the concentrations of scale-forming ions in the medium—such as calcium, magnesium, and sulfate—remain unchanged, preventing scaling altogether.

► No algae is produced, resulting in excellent environmental performance;

► Save water, save electricity, and save your peace of mind. During winter and spring when temperatures are low, you may not even need to spray water—just air cooling can effectively meet the cooling requirements, resulting in significant water savings. Plus, it operates automatically without manual intervention; once the temperature reaches the set level, the system will automatically stop the spray pump or fan.

Application Scenarios

Commonly used in heavy industries such as iron and steel metallurgy, casting and smelting, petrochemicals, chemical light textiles, and machinery and power, it resists scaling, minimizes evaporation, and is often employed for cooling applications like desalinated water and purified water—cooling occurs within closed heat exchange tubes that are completely isolated from the external atmosphere.

► Steel metallurgy: blast furnaces, continuous casting and rolling, crystallizers, air compressors, and more;

► Large-scale casting: melting furnaces, frequency converters, quenching fluids, and more;

► Oil refining: Reactors, refining furnaces, heat exchangers, and more;

► Chemical Industry & Light Textiles: Reactors, etc.;

► Air conditioning cooling: compressor, etc.;

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Evaporative condenser

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Evaporative condenser

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