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Closed circuit Cooling Towers are hybrids that pass the working fluids through a tube bundle,
upon which clean water is sprayer and a fan-induced draft applied. The resulting heat transfer.

performance is much closer to that of a wet cooling tower, with the advantage provided by a dry cooler of protection the working fluid from environment exposure and contamination .The warm water can be cooled to a temperature lower than ambient air dry-bulb temperature, if the air is relatively dry.

As ambient air is drawn past a flow of water, the water droplets over the tubes evaporate, the energy required by that portion of water to evaporate is taken from the remaining mass of water reducing the temperature. Evaporation results in saturated air conditions, lowering the temperature of water process by the tower to a value close to wet bulb air temperature, which is lower than the ambient dry bulb air temperature, the difference determined by the humidity of the ambient air.

 Closed circuit cooling towers completely isolate the process fluid from the atmosphere. This is accomplished by combining the heat rejection equipment with a heat exchanger in a closed circuit tower. A closed loop system protects the quality of the process fluid, reduces system maintenance, and provides operational flexibility at a slightly higher initial cost.

 It isolates the process fluid in the closed loop system and prevents the airborne contaminants from entering and fouling the system.

 Since the fluid is isolated, routine maintenance is only required. The need to shut down the system periodically to clean the heat exchanger to clean the heat exchanger is dramatically reduced.

 The process requires minimal water treatment. Lower volume of recirculating water to treat.

 During Periods of dry operation, the need for make-up water is eliminated.

 Compact design of the closed circuit tower conserves space.

     Cleaner process fluid results in a cleaner internal surface area and higher efficiency components in the system.

 Reduced system maintenance costs.

 Reduced water treatment costs.

 Operating in free cooling mode during the winter to save energy consumption.