How you can design a Heat Exchanger ?

This is frequently asked question in many of the interviews ! Heat Transfer is an important operation whatever the industry( e.g chemical industry, Pharmaceutical industry, Bio Pharma ..many more )  you talk about . Heat Transfer means there is the exchange of thermal energy takes place between two bodies / fluids due to the  presence of thermal gradient, when they  comes in contact . Designing a heat exchanger is very crucial so that efficiently heat transfer can takes place.

Let see first  in a brief about the classification of Heat Exchangers.

Among all Shell and Tube type heat Exchangers are frequently used one.