Induced Draft Cooling Towers

COOLING TOWERS DOE-HDBK-1018/2-93 Miscellaneous Mechanical Components The nomenclature for induced draft cooling towers, including some items not illustrated in Figure 11 is summarized below. Casing - The casing encloses the walls of the cooling tower, exclusive of fan deck and louvers. Collecting basin - The collecting basin is a receptacle beneath the cooling tower for collecting the water cooled by the cooling tower. It can be made of concrete, wood, metal, or an alternative material. Certain necessary accessories are required such as sump, strainers, overflow, drain, and a makeup system. Drift eliminators - The drift eliminators are parallel blades of PVC, wood, metal, or an alternative material arranged on the air discharge side of the fill to remove entrained water droplets from the leaving air stream. Driver - The driver is a device that supplies power to turn the fan. It is usually an electric motor, but turbines and internal combustion engines are occasionally used. Drive shaft - The drive shaft is a device, including couplings, which transmits power from the driver to the speed reducer. Fan - The fan is a device used to induce air flow through the cooling tower. Fan deck - The fan deck is a horizontal surface enclosing the top of the cooling tower above the plenum that serves as a working platform for inspection and maintenance. Fan stack - The fan stack is a cylinder enclosing the fan, usually with an eased inlet and an expanding discharge for increased fan efficiency. Fill - The fill is PVC, wood, metal, or an alternative material that provides extended water surface exposure for evaporative heat transfer. Intake louvers - The intake louvers are an arrangement of horizontal blades at the air inlets that prevent escape of falling water while allowing the entry of air. ME-05 Rev. 0 Page 20