COOLING TOWERSDOE-HDBK-1018/2-93Miscellaneous Mechanical ComponentsThe nomenclature for induced draft cooling towers, including some items not illustrated inFigure 11 is summarized below.Casing -The casing encloses the walls of the cooling tower, exclusive offan deck and louvers.Collecting basin -The collecting basin is a receptacle beneath the cooling towerfor collecting the water cooled by the cooling tower. It can bemade 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 ofthe fill to remove entrained water droplets from the leaving airstream.Driver -The driver is a device that supplies power to turn the fan. It isusually an electric motor, but turbines and internal combustionengines are occasionally used.Drive shaft -The drive shaft is a device, including couplings, whichtransmits power from the driver to the speed reducer.Fan -The fan is a device used to induce air flow through the coolingtower.Fan deck -The fan deck is a horizontal surface enclosing the top of thecooling tower above the plenum that serves as a workingplatform for inspection and maintenance.Fan stack -The fan stack is a cylinder enclosing the fan, usually with aneased inlet and an expanding discharge for increased fanefficiency.Fill -The fill is PVC, wood, metal, or an alternative material thatprovides extended water surface exposure for evaporative heattransfer.Intake louvers -The intake louvers are an arrangement of horizontal blades atthe air inlets that prevent escape of falling water while allowingthe entry of air.ME-05Rev. 0Page 20
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