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<br />55 <br /> <br />10 <br /> <br /> <br />"""" CONDENSER <br /><.0 SUR FACE COST 50 <br /> 5 dollors/ft2 <br />CJl <br />..;;:. "0 <br /> '" <br /> "" <br /> "- <br /> '" <br /> - <br /> c 45 ;; <br /> .. <br /> " 0 '" <br /> 1 "" <br /> "- <br /> '" <br /> - <br /> c <br /> '" .. <br /> 0 .. <br /> u I <br /> 0:: 40 <br /> w -5 <br /> ~ ... <br /> .. '" <br /> ~ 0 <br /> --' u <br /> .. 0:: <br /> ~ W <br /> ... <br /> z 35 .. <br /> w -10 ~ <br /> 0:: <br /> W <br /> "- <br /> "- <br /> i5 <br /> 30 <br /> BASIS' SO mgd MSF PROCESS <br /> STUDY GROUND RULES <br /> 25 <br /> .20 <br /> 10 20 30 40 <br /> UNIT STEAM COST - centsll06 Btu TA.-6701-10R <br /> <br /> <br />FIGURE 6 WATER COSTS AND EVAPORATOR INVESTMENT RESULTING FROM VAR- <br />IOUS STEAM AND CONDENSER SURFACE COSTS IN THE MSF PROCESS <br /> <br />Future Development of the MSF Process <br /> <br />Two important problems of the MSF process that are now receiving <br /> <br />considerable research effort are the optimum geometry of the flash <br /> <br />chamber and selection of materials for construction. The geometry and <br /> <br />design of the flash chamber determine the disengagement of the vapor from <br /> <br />the brine, approach to thermal equilibrium, and the separation of brine <br /> <br />from the vapor. The important variables are: stage temperature and <br /> <br />temperature drop per stage, forward brine velocity, length and height of <br /> <br />23 <br /> <br />