Evaporative air cooler

An evaporative air cooler utilizes the evaporation of sprayed water, which is carried away by the air outside the tower to cool and exchange heat with the circulating medium inside the heat-exchange tubes. The circulating medium remains completely isolated from the external environment. Since the sprayed water vaporizes, a large amount of water vapor mixes with the air, increasing the humidity. Therefore, powerful ventilation equipment—namely, fans—are required to remove this saturated, high-humidity, high-enthalpy air from the tower. On the surface, it appears that the air is being cooled while simultaneously undergoing the evaporation of the sprayed water. Hence, it is commonly referred to as an evaporative air cooler or, in some cases, an evaporative cooler.

Key words:

Classification:

Evaporative Air Cooler

Hotline:

Evaporative air cooler

Overview

The evaporative air cooler utilizes the evaporation of sprayed water, which is carried away by the air outside the tower to cool and exchange heat with the circulating medium inside the heat-exchange tubes. The circulating medium remains completely isolated from the external environment.

Since, after the spray water vaporizes, a large amount of water vapor mixes with the air, increasing the humidity, powerful ventilation equipment—namely, fans—are required to remove this saturated, high-humidity, high-enthalpy air from the tower. On the surface, this process appears as air cooling accompanied by the evaporation of the spray water. Such systems are commonly referred to as evaporative air coolers or, sometimes, simply as evaporative coolers.

Working principle

► Latent heat of vaporization: Similar to that of a closed-circuit cooling tower, it relies on the evaporation of spray water outside the heat exchange tubes to absorb the latent heat of vaporization and carry away the thermal energy from the industrial circulating water medium inside the enclosed heat exchange tubes.

► Baffle heat exchange: The spray water and air are completely isolated from the circulating medium, with no direct contact whatsoever—only heat transfer occurs, with no physical contact.

Main advantages

► No evaporation: It only cools down without any evaporation or consumption. The circulating medium is completely isolated from the external air, with no direct contact whatsoever. There is neither evaporation nor consumption of the medium, and no impurities enter the system, ensuring the stability of the internal medium composition.

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

► Easy maintenance: All coils are fully visible, making maintenance convenient and inspections straightforward.

► The device features air intake from all four sides, resulting in low airflow resistance and reduced fan power consumption.

Application scenarios

Widely used in heavy industries such as iron and steel metallurgy, casting and smelting, petrochemicals, chemical fiber and light industry, and mechanical and electrical engineering, this system is resistant to scaling and reduces evaporation. It is commonly employed for cooling desalinated water, purified water, and other similar fluids by circulating them within closed heat-exchange tubes that are completely isolated from the external atmosphere.

► Iron and steel metallurgy: blast furnaces, continuous casting and rolling, crystallizers, air compressors, etc.;

► Large-scale casting: melting furnaces, frequency converters, quenching fluids, etc.;

► Petroleum refining: reaction vessels, refining furnaces, heat exchangers, etc.;

► Chemical industry and light textiles: reaction kettles, etc.;

► Air conditioning cooling: compressor, etc.;

Brand Advantage

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Case

Due to their use in industries such as iron and steel metallurgy, chemical engineering, light textile, and petroleum refining, these products typically have flow rates of 500 m³/h or higher and feature relatively large external dimensions. All of them are custom-made, designed according to transportation conditions, site requirements, and production process parameters; there is no uniform standard applicable to them.

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