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<br />W <br />"-l <br />CJl <br />-.J <br /> <br />c. 'rhe Saline Water Coo1inr Tower. - An innovative approach to using <br />low quallty water ln powerp ant cooling has been developed by Tower <br />Systems, Inc., of Tacoma, Washington. Their BCT (Binary Cooling <br />Tower) process utilizes a heat exchange system designed such that air <br />and low quality water can be circulated through the evaporative <br />secondary loop [13] (see fig. 7). Primary cooling water quality is <br />maintained at a high degree of purity to protect condensers and other <br />water quality sensitive components. <br /> <br />j~ <br /> <br />AIR AND VAPOR OUT <br /> <br />AIR I <br /> <br /> <br />CIRCULATING COOLING WATER (HOn <br />(PRIMARY) CLOSED LOOP <br /> <br />SALINE WATER <br />EVAP. LOOP <br />(OPEN) <br />SECONDARY <br />LOOP <br /> <br />MAIN <br />CONDENSER <br /> <br /> <br />AIR IN <br /> <br />COOLING WATER (COLD) <br /> <br />BLOW DOWN <br /> <br />MAKE -UP <br />REJECT SOFTENING TREATMENT <br /> <br /> <br />BRINE' EVAPORATION POND <br />Fig_ 7 SALINE WATER COOLING TOWER <br /> <br />With softening pretreatment, very high salinities can be tolerated in <br />t~e Secondary loop by u~e of corrosion-resistant materials together <br />wlthslde stream softenlng to prevent scal ing. The heat exchanger <br />pane Is are composed of p 1 ast i c frami ng materi a 1 s, water man ifo lds, <br /> <br />IV-19 <br /> <br />-'Co - <,~, ,_ - _ <br />