Repeat Exercise 20.3 for the LSF configuration in Figure 20.2.

Data From Exercise 20.3:-

Consider the FS two-column configuration for the separation of methanol and water in Figure 20.2 and

(a) determine the number of degrees of freedom for the overall system,

(b) determine the number of controlled and manipulated variables, and

(c) select a workable control configuration using qualitative arguments.

Figure 20.2:-

F FH 3 H LH FS E ORH ORL XBH XDH XBL XDL H LH LSF LSR F LH H 3 ORH ORL ORL ORH XDH XBL XDL XDL XDH XBH (b) (c) Figure 20.2 Three heat-integrated alternatives to a single distillation column.