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<br />21 <br /> <br /> <br />,.... 60 <br />CO <br />CJl <br />N HIGHER FIXED COSTS LOWER FIXED COSTS <br /> .' . <br /> HIGHER INTEREST LOWER INTEREST <br /> SHORTER PLANT LIFE LONGER PLANT LIFE <br /> .. 50 SMALL PLANTS LARGE PLANTS <br /> INCREASED MATERIAL COSTS LOWER COST MATERIALS <br /> ~ LOWI::R HEAT TRANS, COEF, HIGHER HEAT TRANS. COEF. <br /> Qi LOW PLANT AVAILABILITY HIGH PLANT AVAILABILI TY <br /> .. <br /> 0 <br /> ........ <br /> " 50 mgd PLANT <br /> C <br /> .. 40 AND THIS <br /> u STUDY GROUND <br /> / RUL ES <br /> / <br /> t- / <br /> 00 / <br /> 0 / <br /> 0 <br /> :l! 30 / <br /> <t / <br /> w <br /> t- <br /> oo / <br /> t- / <br /> z <br /> :::> / / <br /> 20 <br /> / / <br /> / / <br /> / <br /> 10 <br /> 5 10 15 20 25 30 <br /> OPTI MUM PERFORMANCE RATIO Ib water /103 Btu <br /> TA~7.0t.l <br /> <br />FIGURE 4 INTERRELATION OF STEAM COSTS, FIXED COSTS, AND PERFORMANCE <br />RATIO IN THE MSF PROCESS <br />