Task 1 Q1(a) Multiple effect evaporators are the most widely used heat transfer equipment in the concentration of liquids in chemical process and industries. It is essential for the design engineer to have a good working knowledge on the mechanical design features of double effect evaporator and how they influence the thermal design. In this context, discuss the thermal design considerations of double effect evaporators highlighting its advantages and limitations. [20] (b) Dryers are classified based on the mode of operation such as batch or continuous, type of heating mode (ie conduction, convection, radiation), physical state of the feed such as wet solid, liquid, and slurry etc. The designer must consider several factors that influence during the design of dryers. Discuss the major design considerations to be followed in the design of Spray dryers and Rotary drum dryers. [201