Question

How to increase the economy of multi effect evaporator?

(a) Decrease the usage of steam

(b) Increase the steam capacity

(c) Reuse the latent heat of the water vapor

(d) Reuse the latent heat of the liquid feed

I had been asked this question by my school teacher while I was bunking the class.

I'm obligated to ask this question of Single and Multiple Effect Evaporators topic in chapter Evaporation of Food Processing Unit Operations

Answer 1

Correct answer is (a) Decrease the usage of steam

For explanation I would say: Reuse the latent heat of the water vapor to increase the economy of multi effect evaporator.This type of evaporator uses the water vapor from one effect as the heating medium for the next effect, which operates at a lower boiling point.