How Does A Shell And Tube Heat Exchanger Work?

- May 30, 2018-

The shell heat exchanger is composed of shell, heat transfer tube bundle, tube plate, baffle (baffle) and tube box

The shell body is mostly cylindrical, and there is a tube bundle inside. Both ends of the tube bundle are fixed on the tube plate

Two kinds of fluids for heat exchange, one is flowing in the tube, which is called tube flow. Another kind of flow outside the tube is called shell flow


In order to improve the heat transfer coefficient of the fluid outside the tube, several baffles are usually installed in the shell

The baffle can increase the velocity of shell flow, force the fluid to cross the tube bundle several times according to the prescribed distance, and enhance the turbulent degree of fluid flow


Heat exchangers may be arranged in equal - sided triangle or square on the tube plate


The equilateral triangle arrangement is compact, the turbulent degree 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 and is suitable for the fouling fluid.


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