What are the functions of finned tube heat exchanger?

What are the functions of finned tube heat exchanger?

The structure of the finned tube heat exchanger is basically the same as that of the general shell and tube heat exchanger, except that the finned tube is used instead of the light tube as the heat transfer surface. This makes its structure more compact, and the heat exchange area increases, which can enhance heat exchange.

There are several principles:

(1) If the heat transfer coefficient on both sides of the tube is very different, fins should be installed on the side with the smaller heat transfer coefficient.

Example 1: Boiler economizer, water flows inside the tube, flue gas flows out of the tube, and fins should be used on the flue gas side.

Example 2: For an air cooler, the liquid flows inside the tube and the air flows out of the tube, and the fins should be added on the air side.

Example 3: In a steam generator, water boils inside the tube, and flue gas flows outside the tube, and the fins should be added on the side of the flue gas.

It should be noted that in the design, the side with the small heat transfer coefficient should be placed outside the tube as much as possible to facilitate the installation of fins.