13/02/2026
Shell and Tube Heat Exchanger
A shell and tube heat exchanger, also known as a tube-in-shell heat exchanger, is an indirect heat exchanger that uses the wall surface of the tube bundle enclosed in the shell as the heat transfer surface. This type of heat exchanger has a relatively simple structure, reliable operation, and can be manufactured from various structural materials (mainly metals). It can be used under high temperature and high pressure conditions and is the most widely applied type currently.
Principle: The working principle of a shell and tube heat exchanger mainly consists of components such as tube sheets, shell, tube bundle, and fl**ge connections. One process fluid enters the heat transfer tubes via the inlet connection on the tube sheet end; its flow path can be configured as single-pass, double-pass, or four-pass structures according to process requirements. The other process fluid enters the shell through the inlet connection on one end of the shell and is evenly distributed outside the heat transfer tubes. Its flow state can be controlled by installing baffles of different types and quantities within the tube bundle according to process requirements. As the heat transfer element—the heat transfer tube—different materials such as brass tubes, copper finned tubes, and steel tubes can be selected according to process requirements, thereby ensuring that fluids of different properties and temperatures exchange heat within the exchanger to achieve the purpose of cooling or heating.
Shell and Tube Heat Exchanger
Cold Fluid
Hot Fluid
Cold fluid flows inside the tubes, hot fluid flows outside the tubes through the baffles; cold and hot fluids exchange heat through the wall.
Animation Production
Advantages, Disadvantages, and Applicable Conditions:
Advantages: Simple and compact structure, capable of withstanding high pressure, low cost, convenient for cleaning the tube side, and damaged tubes can be easily plugged or replaced. It has more tubes than a U-tube heat exchanger.
Disadvantages: The shell side cannot be mechanically cleaned; there is a large temperature difference stress between the tube wall and the shell wall; the tube bundle cannot be replaced, leading to higher maintenance costs.
Applicable Scope: Situations where the shell-side medium is clean and not prone to scaling, the temperature difference between the tube side and shell side is not large, or the temperature difference is large but the shell-side pressure is not high.
