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<br />ONCE-THROUGH COOLING <br /> <br />COOLING PONDS <br /> <br />--- <br /> <br />--- <br /> <br />Outfall <br /> <br />River <br /> <br />t <br /> <br />~ <br /> <br />Powerplant <br /> <br />A <br /> <br />WET-COOLING TOWERS <br /> <br />--- <br /> <br />t <br /> <br />:::J <br /> <br />--- <br /> <br />River <br /> <br />Intake <br /> <br />Slowdown <br />t outfall <br /> <br />Q <br />Q <br />No <br />...... <br />~ <br />o <br /> <br />Makeup <br />1 water <br />, intake <br /> <br />Cool ;ng 01 'I) 01 <br />pond <br /> t , J '-- J t <br /> "- <br />Outfall t Intake <br /> t <br /> \ ~ <br /> , <br /> <br />t <br /> <br />:::; <br /> <br />Powerplant <br /> <br />tv <br />- <br /> <br />B <br /> <br />r;: <br /> <br />t <br /> <br /> <br />Blowdown <br />evaporeting <br />pond <br /> <br />--- <br /> <br />River <br /> <br />Wet-cooling tower <br /> <br />000 <br /> <br />--- <br /> <br />--- <br /> <br />Powerplant <br /> <br />c <br /> <br />--- <br /> <br />o <br /> <br />Makeup <br />water <br />intake <br /> <br />DRY-COOLING TOWER <br /> <br />I <br /> <br />r;:: - - \I <br />t t <br />,\.: - --- ~ <br /> <br />) <br />- <br /> <br />Powerplant <br /> <br />D <br /> <br />FIGURE 3.-Schematic diagrams of four cooling systems. (From Hirsch and others, 1978.) <br />