Closed circuit cooling towers are one of the methods of heat transfers. They are hybrids that pass the working fluid through a tube bundle, upon which clean water is sprayed 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 protecting the working fluid from environmental exposure and contamination.Costs Less to purchase & operate, Less Total HP required, Green solution, open towers use an efficient, simple, and economical design. This is accomplished by combining heat rejection equipment with a heat exchanger in a closed circuit tower