What are the advantages of finned tubes

July 13, 2022

The advantages of Finned Tubes are mainly

1. Strong heat transfer ability: Compared with the light pipe, the heat transfer area can be increased by 2-30 times, and the heat transfer coefficient can be increased by 1-2 times.

2. Compact structure: Due to the increased heat transfer area per unit volume, the heat transfer capacity is enhanced. Compared with the same heat load, the Finned Tube Heat Exchanger has fewer tubes, and the diameter or height of the cylinder can be reduced. Easy to set up.

3. Materials can be used more effectively and rationally: not only because of the compact structure, the amount of material is reduced, but also it is possible to flexibly select materials for heat transfer and process requirements, such as inlaid or welded Fin Tubes made of different materials;

4. When the medium is heated, the wall temperature of the Finned Tube under the same heat load decreases compared with that of the bare tube, which is beneficial to reduce the high temperature corrosion and over-temperature damage of the metal surface.

No matter the medium is heated or cooled, the heat transfer temperature difference is smaller than that of the bare tube, which is beneficial to reducing the scaling on the outer surface of the tube. Another important reason for the reduction of scaling is that the finned tube will not form a uniform overall scale layer along the circumference or the axial direction like the bare tube. Broken at the root of the fin, causing the ridge scale to fall off by itself.

5. For the phase change heat, the heat transfer coefficient or the critical heat flux density can be used. The main disadvantages of finned tubes are high cost and large flow resistance. For example, the finned tube of the air cooler has a complex process, and its construction cost is 50-60% of the equipment cost; the resistance is large, resulting in a large power consumption. However, if the shape is appropriate, the power consumption can be reduced, which is cost-effective compared with the benefits of enhanced heat transfer.

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