Selection of fluid space for shell and tube heat exchanger

To make the heat exchanger operate normally and efficiently, the flow space must be carefully selected.

(1) Temperature. High-temperature fluid generally travels through the tube pass. Because high temperature reduces the allowable stress of the material, the high-temperature fluid travel can save the insulation layer and reduce the thickness of the shell. Sometimes, in order to facilitate the heat dissipation of the high-temperature fluid, the high-temperature fluid can also travel the shell side. However, in order to ensure the safety of operators, an insulation layer is required.

(2) Pressure. The higher pressure fluid can reduce the thickness of the shell.

(3) Viscosity.

(4) Corrosive. The more corrosive fluid should be run through the pipe to save corrosion-resistant materials.

(5) Pressure drop.

(6) Cleanliness. Dirty and easy-to-scaling fluids should be run through the pipe to facilitate cleaning and control of scaling. If it is necessary to walk the shell side, the square arrangement should be adopted, and the detachable type (floating head type, stuffing box type, U-tube type) heat exchanger should be adopted.

(7) Flow rate.

(8) Convection heat transfer coefficient.