Lord Fin Tube-Oval Finned Tube

What is oval finned tube?

The oval finned tube is a type of heat exchanger that consists of a oval base tube and outer rectangular fins. oval rectangular finned tubes, oval oval finned tubes, oval circular finned tubes, spiral oval flat tubes, oval H-shaped finned tubes, and so on are examples. Oval finned tubes are gaining popularity due to their superior performance to round finned tubes. Oval finned tubes are now widely used in industries such as ethylene and oil refining. In heat exchange equipment, the oval finned tube serves as an efficient heat exchange element. Because the tubes external resistance is low and the heat exchange efficiency is high, heat exchange equipment tends to be compact, lightweight, efficient, and miniaturized.

There are many types of finned tubes. According to the different installation positions of fins, there are two kinds of finned tubes: inner finned tubes and outer finned tubes, and the application of outer finned tubes is more common. According to the different arrangement of fins, there are two types of finned tubes: longitudinal finned tubes and horizontal finned tubes. Depending on the shape of the base tube, the finned tubes include round finned tubes, oval finned tubes, and flat tube finned tubes. At present, round finned tube heat exchangers dominate the market, but a large number of tests have shown that, compared with round finned tubes, the backflow area and windward area of ​​the oval tube are much smaller, effectively reducing the air Side flow resistance and reduce energy consumption; when the number of tube bundles is the same, oval tubes and flat tubes are more compact than round tubes, the volume of the heat exchanger is smaller, and the cost is reduced. Therefore, the research and development of oval tube-fin heat exchangers are increasingly valued by scholars.

Oval finned tube main advantages:

(1) When compared to round tube finned tubes, oval finned tubes allow for a more compact layout, reducing the overall volume of the heat exchanger and thus the footprint.

(2) Because of the oval fin tubes shape characteristics, the air side resistance is low, and the heat transfer coefficient between the fluids increases; the thermal resistance in the tube is low, which increases the heat transfer of the fluid in the tube.

(3) The oval finned tube has a larger heat transfer area than the circular tube with the same cross-sectional area. This is due to the oval tubes relatively long heat transfer perimeter under the same cross-sectional area.

(4) The most commonly used oval finned tube is rectangular steel fin, which has high strength and a long service life, and the base tube should not be frozen and cracked in winter.

(5) Because oval finned tubes can be more compactly arranged, the front row of tubes has a greater impact on the rear row, and the outer flow resistance of the tube can be reduced by increasing the fin spacing of the rear row of tubes, but the number of tube rows should not be too large.

Oval Finned Tube