Multiple Effect Evaporation


Vapor from first effect can be used as steam for the second effect and so on.

  • Effects are thus numbered beginning with the one heated by steam. It will have the highest pressure.

  • Pressure drops through the sequence so that the hot vapor will travel from one effect to the next automatically.

  • Normally, all effects in an evaporator will be physically the same in terms of size, construction, and heat transfer area. Unless thermal losses are significant, they will all have the nearly the same capacity as well.