The principle of industrial air cooler and its influencing factors

Summary:Industrial air coolers use the principle of outdoor fresh air evaporative cooling to cool down and perform convective ve...

Industrial air coolers use the principle of outdoor fresh air evaporative cooling to cool down and perform convective ventilation with the room to achieve indoor ventilation and cooling. It has the characteristics of no compressor, no cold coal, and no pollution. Its cost is less than half of the traditional compressor air-conditioning system, and the equipment does not occupy any building area. The system is simple, easy and fast to install and maintain, without the need for professional maintenance personnel.
Principle of air cooler
When the fan is running, it enters into the cavity to generate negative pressure, so that the outside air flows through the porous and humid wet curtain surface to force the dry bulb temperature of the curtain air to drop to close to the wet bulb temperature of the outside air, that is, the dry bulb at the outlet of the air cooler The temperature is 5-12°C lower than the outdoor dry bulb temperature (up to 15°C in dry-hot areas). The drier and hotter the air, the greater the temperature difference and the better the cooling effect.

Influencing factors of cooling effect
1. The greater the density of the water curtain, the more even the water distributed by the pump during operation, and the more thorough and cooler the air filtered by the air cooler.  
2. The greater the air volume, the faster the ventilation frequency, and the indoor hot air is driven out by the cooler air before it is generated.  
3. The cooler the water temperature, the cooler the wind blown by the air cooler, and the higher the cooling effect. Air cooler air supply method The cooler adopts axial ventilation technology. When the axial fan is working, the impeller of the cooling fan driven by the power machine rotates in the cylindrical casing, and the gas enters from the collector, obtains energy through the impeller, increases the pressure and speed, and then discharges in the axial direction. There are three layout forms of axial flow fans: vertical, horizontal and inclined. The diameter of the small impeller is only about 100 mm, and the large one can reach more than 20 meters. Axial flow air coolers, large low-pressure axial flow air coolers are composed of impellers, casings and current collectors, and are usually installed on the walls or ceilings of buildings; large high-pressure axial flow fans are composed of current collectors, impellers, and flow lines Body, housing, diffuser and transmission components. The blades are evenly arranged on the hub, and the number is generally 2-24. The more blades, the higher the wind pressure; the blade installation angle is generally 10°~45°, the larger the installation angle, the greater the air volume and pressure. Most of the main parts of the axial flow air cooler are welded or riveted by steel plates.