p3_f07

# p3_f07 - WPS417 FALL2007 Due .Youaretodevelopa...

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WPS 417 FALL 2007 Problem 3 - Multiple Effect Evaporators Due:11/12/07 A flowsheet and data for a triple effect backward feed evaporator system are attached.  You are to develop a  spreadsheet simulation for this system.   Relationships   for  steam  table   physical   properties   should   be   taken   from  the   article   by   Jagannath;   the  equations are given on the next page.  In addition, you should determine the boiling point rise for each effect  using the following equation:           BPR = 13.5(S)/(1-S)           where S = weight fraction black liquor solids out of effect and BPR =  ° Report the liquor and vapor flows, temperature and enthalpy throughout the system, as well as the steam  economy and total evaporation and steam usage in lb/hr.  Your spreadsheet should be in the form of a well- ordered table, complete with labels and units.  For example:                                   Effect 1 Effect 2 Effect 3      Liquor in, lb/hr      Liq. temp. in, F      Effect Pressure, psia      Sat'd effect temp, F      BPR, F       etc.

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