Baffles, as the name implies, are used to change the direction of fluid flow. They are often used in the design of shell-side medium flow channels in shell-and-tube heat exchangers. The number of baffles is determined based on the properties and flow of the medium and the size of the heat exchanger. Baffles are set in the shell side, which can not only improve the heat transfer effect, but also support the tube bundle. Baffles are of two types: arched and disc-circular. Arched baffles are of three types: single arched, double arched, and triple arched.
The design of the baffle needs to be determined according to the specific working conditions, such as the properties of the fluid (such as viscosity, corrosiveness), the required heat transfer efficiency, the allowable pressure loss and other factors. Proper design and installation of baffles are essential to ensure the performance of the heat exchanger.