Oval Fin Tube
What is an oval fin tube?
An oval fin tube, also known as an elliptical finned tube, is a heat exchange element consisting of an elliptical base tube and external fins.
Types of oval fin tubes
Common types include elliptical rectangular finned tubes, elliptical oval finned tubes, elliptical circular finned tubes, spiral elliptical flat tubes, and elliptical H-shaped finned tubes. Elliptical finned tubes offer superior heat dissipation performance compared to circular finned tubes and are widely used in industries such as ethylene and oil refining.
The design of elliptical finned tubes not only increases the heat transfer surface area but also effectively reduces the flow resistance and pressure drop of the medium within the tube, improving the system’s energy efficiency. This is particularly important for industrial applications that require reduced energy consumption.
Features of elliptical finned tubes
Oval fin tubes are used as high-efficiency heat exchange elements in heat exchange equipment. Their low external flow resistance and high heat transfer efficiency make heat exchange equipment compact, lightweight, efficient, and miniaturized.
(1) Compared with circular finned tubes, elliptical finned tubes are easier to arrange compactly, which reduces the overall volume of the heat exchanger and thus reduces the floor space.
(2) Due to the shape characteristics of elliptical finned tubes, the air side resistance is small, the heat transfer coefficient between fluids is increased; the thermal resistance inside the tube is relatively small, which increases the heat transfer of the fluid inside the tube.
(3) The heat transfer area of elliptical finned tubes is larger than that of circular tubes with the same cross-sectional area. This is because the heat transfer perimeter of elliptical tubes is longer under the same cross-sectional area.
(4) The most commonly used elliptical finned tubes are rectangular steel fins, which have high strength, the base tube is not easy to freeze and crack in winter, and have a long service life.
(5) Since elliptical finned tubes can be arranged more compactly, the front row of tubes has a greater impact on the rear row. The external 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.