Products Description

The Cross Flow Shell And Tube Heat Exchanger consists of a shell, a heat transfer tube bundle, a tube sheet, a baffle (baffle), and a tube box. The shell is mostly cylindrical, with a tube bundle inside, and both ends of the tube bundle are fixed on the tube sheet. The two hot and cold fluids for heat exchange, one flows inside the tube, called the tube-side fluid; the other flows outside the tube, called the shell-side fluid. In order to increase the heat transfer coefficient of the fluid outside the tube, several baffles are usually installed in the shell. The baffle can increase the shell-side fluid velocity, forcing the fluid to pass through the tube bundle horizontally for multiple times according to the specified distance, and enhancing the turbulence of the fluid. The heat exchange tubes can be arranged in an equilateral triangle or square on the tube sheet. The equilateral triangle arrangement is more compact, the turbulence of the fluid outside the tube is high, and the heat transfer coefficient is large; the square arrangement is convenient for cleaning the outside of the tube, which is suitable for fluids that are prone to scaling.

Product picture

Product characteristics

Selection features of Cross Flow Shell And Tube Heat Exchangers:

Determine the required heat exchange area based on the known flow rate of cold and hot fluids, initial and final temperatures and specific heat capacity of the fluids. To preliminarily estimate the heat exchange area, generally assume the heat transfer coefficient first, determine the heat exchanger structure, and then check the heat transfer coefficient K value.

When selecting a heat exchanger, pay attention to the pressure level, operating temperature, and connection conditions of the interface. Under the premise that the pressure drop and installation conditions allow, the shell and tube heat exchanger should be selected with a small diameter and extended type, which is conducive to increasing the heat exchange capacity.

The flow rate should take into account the viscosity of the fluid. The flow rate of high viscosity should be less than 0.5~1.0m/s; the flow rate in the general fluid pipe should be 0.4~1.0m/s; the flow rate of the fluid that is easy to scale should be 0.8~1.2m/s.