The operation of a Shell & Tube Type Heat Exchanger involves the following key steps:

Step 1 : Hot Fluid Inlet: The fluid with a higher temperature enters the heat exchanger through the inlet nozzle and flows through the tubes.

Step 2 : Cold Fluid Inlet: The fluid with a lower temperature enters the heat exchanger through another inlet nozzle and flows around the tubes within the shell.

Step 3 : Heat Transfer: As the hot fluid passes through the tubes and the cold fluid surrounds the tubes, heat is exchanged between the two fluids. The hot fluid transfers its heat to the cold fluid.

Step 4 : Heat Exchange Process: The heat exchange process takes place through the tube walls, enabling efficient heat transfer without direct mixing of the two fluids.

Step 5 : Cold Fluid Outlet: The now heated cold fluid exits the heat exchanger through an outlet nozzle.

Step 6 : Hot Fluid Outlet: The cooled hot fluid exits the heat exchanger through another outlet nozzle.