Wort cooling is a crucial step in the brewing process, and shell and tube heat exchangers are commonly used for this purpose. These heat exchangers consist of a series of tubes housed within a cylindrical shell. In the context of wort cooling, hot wort flows through the tubes while cold water runs through the surrounding shell, or vice versa, depending on the design. This configuration allows for efficient heat transfer, rapidly bringing the wort to the desired fermentation temperature. The use of shell and tube heat exchangers ensures that the wort cools evenly and quickly, minimizing the risk of contamination and preserving the quality of the brew.