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<br />w <br />~ <br />CJ1 <br /> <br />00 and mylar sheets. Effective heat transfer rates are achieved through <br />the mylar sheets in spite of their relatively low thermal conductiv- <br />ity due to the thinness of the sheeting and the falling film configu- <br />ration of the primary cooling water on one side and the high salinity <br />evaporating loop water on the other, See figure 8, heat transfer <br />module [14], <br /> <br /> <br />\ <br />CONCENTRATED <br />WASTE WATER <br />OUT <br /> <br />Fi gure 8 <br />HEAT TRANSFER MODULES FOR SALINE WATER COOLING TOWER <br /> <br />A BCT high salinity secondary loop of a system was successfully <br />tested over an 11-week period (March-June 1979) at the Nevada Power <br />Company's Sunrise Station at Las Vegas. The system operated satis- <br />factorily with secondary evaporation loop TDS levels of 80,000 to <br />130,000 mg/L [13], although the test was not of long enough duration <br />to test long-term reliability/maintainability. <br /> <br />Although not a full-sized module, the first commercial installation <br />of a BCT side stream module will be at Lakeland, Florida. About <br />200 gallons per minute of 6,000-mg/L wastewater will be recycled in <br />the cooling tower module to 120,000 mg/L before blowdown, The resul- <br />tant blowdown will be reduced to 8 gal/min for final disposal [15], <br /> <br />IV-20 <br />