Tipo Heat exchangers are devices that transfer energy, in the form of heat, from one working fluid to the next, whether that be solids, liquids, or gases. These devices are essential for refrigeration, power generation, HVAC, and more, and come in many shapes and sizes that can both introduce heat or remove it. Understanding what makes one heat exchanger unique from another is often difficult, so this article will help readers gain an introductory knowledge on one of the most popular heat exchangers, the shell and tube heat exchanger. This article aims to reveal what shell and tube heat exchangers are, how they work, what types exist, and how they are used in industry.