A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. They can be classified by the application, in Industrial cooling towers and HVAC cooling towers. We offer products for the second group, where an HVAC (heating, ventilating, and air conditioning) cooling tower is used to dispose of ("reject") unwanted heat from a chiller. Within this group, the cooling tower can be also classified by their construction: package type and field erection type.
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Categorization by air-to-water flow: Counter Flow Type Cooling Towers
In a counterflow design, the air flow is directly opposite to the water flow (see diagram at left). Air flow first enters an open area beneath the fill media, and is then drawn up vertically. The water is sprayed through pressurized nozzles near the top of the tower, and then flows downward through the fill, opposite to the air flow.
Common aspects of both designs:
Both crossflow and counterflow designs can be used in natural draft and in mechanical draft cooling towers.