A Heat Exchanger is a system used to transfer heat between two or more fluids. They are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. It was bit tricky to create the pipes within shortest time possible. Youtube videos helped a bit in the entire process. Main Components used are : 1. Shell 2. Tube Bundle 3. Head Cover 4. Shell Cover 5. Flange