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Calculation method of elliptical efficiency of elliptical stainless steel finned tube

Compared to circular finned tubes, elliptical stainless steel finned tubes make it easier to achieve a compact layout, which reduces the overall volume of the heat exchanger and reduces the footprint. Due to the shape characteristics of the elliptical stainless steel finned tube, the air side resistance is small, the heat transfer coefficient between the fluids is increased, and the thermal resistance inside the tube is small, which increases the heat transfer capability of the fluid in the tube. The heat transfer area of ​​the elliptical finned tube is larger than the heat transfer area of ​​the round tube of the same cross-sectional area because the heat transfer circumference of the elliptical tube is longer under the same cross-sectional area. Rectangular fins are the most commonly used fins in elliptical stainless steel finned tubes. It has a very high strength. The base pipe does not crack in winter and has a long service life. Due to the more compact layout of the elliptical stainless steel finned tubes, the front tube has a greater impact on the rear row. By increasing the fin spacing of the rear tube, the flow resistance can be reduced, but the number of rows should not be too large.
Elliptical elliptical stainless steel finned tube and outer fin. Commonly used are elliptical rectangular finned tubes, elliptical elliptical elliptical stainless steel finned tubes, round finned tubes, spiral elliptical flat tubes, elliptical H-shaped fin tubes, and the like. The performance of elliptical elliptical stainless steel finned tubes is much better than that of round finned tubes. At present, elliptical elliptical stainless steel finned tubes are widely used in industries such as ethylene and oil refining.
In calculating the efficiency of elliptical stainless steel finned fins, elliptical stainless steel finned tubes are used in circular finned tubes, which are calculated and analyzed according to circular finned tubes. There are two ways to select an equivalent tube. One is to make the cross-sectional area of ​​the equivalent tube equal to the cross-sectional area of ​​the elliptical tube, and the other is to make the circumference of the equivalent tube equal to the circumference of the elliptical tube. Efficient heat exchanger for elliptical finned elliptical stainless steel finned tube. The flow resistance is small, the heat transfer efficiency is high, and the heat exchange equipment is compact, light, efficient, and miniaturized. Despite the many results of their research, there is still much to be done.

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