Question: A steam-heated evaporator used to concentrate a feed stream by evaporating water is shown in Fig. E8.14. The mass fraction of solute in the exit

A steam-heated evaporator used to concentrate a feed stream by evaporating water is shown in Fig. E8.14. The mass

Overhead D, xp = 0 Pressure Steam, S Feed xF, F Condensate, S AC Хт AT Product х, В Figure E8.14

fraction of solute in the exit stream x is measured and controlled by adjusting the steam flow rate, S. The control valve is fail-open. Should the composition controller be direct-acting?

Overhead D, xp = 0 Pressure Steam, S Feed xF, F Condensate, S AC AT Product , Figure E8.14

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