As an efficient heat exchange element, finned tubes are widely used in various heat exchange equipment, and there are many types and characteristics. A few common finned tube types are detailed below.
1. Rolled finned tubes
Rolled finned tubes are the metal strips that are rolled onto the base tube by mechanical force to form a tightly fitting fin structure. This kind of finned tube has the characteristics of tight combination between the fin and the base tube and high heat transfer efficiency. During the rolling process, the shape and size of the fins can be adjusted as needed to accommodate different heat exchange needs. In addition, rolled finned tubes also have good mechanical properties and corrosion resistance, and can operate stably for a long time in harsh working environments.
2. High-frequency welded fin tube
High-frequency welded finned tubes use high-frequency welding technology to weld the fins together with the base tube. This finned tube has the advantages of high welding quality and strong fin and base tube bond. During high-frequency welding, the contact resistance between the fins and the base tube generates heat, causing the two to melt and join firmly. High-frequency welded fin tubes are suitable for heat exchange under harsh working conditions such as high temperature and high pressure, and are widely used in petrochemical, electric power and other industries.
3. Winding finned tube
Winding fin tube is to wrap metal strip on the base tube at a certain pitch and angle to form a spiral fin structure. This kind of finned tube has the characteristics of simple structure and easy manufacturing. There is a certain gap between the fins and the base tube of the winding finned tube, which can form fluid disturbances and improve the heat transfer efficiency. At the same time, the spiral fin structure also has a certain self-cleaning ability, which can effectively prevent dust accumulation and scaling.
Fourth, set of finned tubes
The sleeved finned tube is a prefabricated fin sleeve on the base tube, which is fixed by tube expansion or welding. This finned tube has the advantage of a wide range of fin shapes and a wide range of applications. The sleeved finned tube can choose different fin materials and shapes according to the actual needs to meet the heat exchange needs under different working conditions. At the same time, the sleeved finned tube also has good thermal expansion performance, which can adapt to the thermal stress caused by temperature changes between the base tube and the fin.
5. Integral finned tube
Monolithic finned tubes are made by casting, forging or extruding to integrate the fins into the base tube. This finned tube is characterized by its compact structure and high strength. The monolithic finned tube has no seam between the fin and the base tube, and the heat transfer efficiency is high and not easy to leak. In addition, the integral finned tube also has good vibration and shock resistance, and can maintain stable operation in complex working environments.
There are many types of finned tubes, each with its own characteristics. In practice, the right finned tube type should be selected based on factors such as specific operating conditions, heat transfer needs, and cost budget. At the same time, with the continuous development of science and technology, new finned tube technology is also emerging, which provides more possibilities for heat exchange equipment to improve performance and save energy consumption. Finned tubes