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Composite tube finned tube is a double fin heat transfer fin tube

The composite tube fin tube is a double fin heat transfer fin tube. The outstanding feature is that the advantages of different strengthening methods can be integrated on the same fin to achieve better overall performance. The bimetal rolled composite finned tube is composed of a base pipe and an outer fin. The base pipe is usually a carbon steel pipe, a stainless steel pipe or a copper pipe. The aluminum tube is placed outside. The aluminum tube is then extruded into the fins using a special rolling mill. At the same time, a thin layer is formed outside the base pipe to tightly wrap the base pipe. The production methods of composite finned tubes are mainly welding and rolling. The main performance requirements of fin-enhanced heat transfer, composite fins and composite finned tubes are described in detail.
With the wide application of central air conditioners in production and life, research on important heat transfer finned tubes in central air conditioners has become more and more important. At present, the most widely used finned tubes in central air conditioners are inner and outer finned copper tubes. Therefore, the research on the production of finned tubes will focus on how to effectively save the utilization of copper metal, and finally achieve the three purposes of improving central air conditioning efficiency, reducing production costs, and saving the country's valuable resources.
In order to meet these needs, the production of composite tube finned tubes combines the advantages of composite tubes and finned tubes. It is a new type of efficient heat transfer tube widely studied in the world. Combined with domestic and foreign materials, the development of Japanese composite finned tube series products is more extensive. For example, the Japanese patent literature reports the production of stainless steel axial composite finned tubes by stainless steel composite radial finned tubes and welding by rolling, but the products developed in Japan are inner surface finned tubes. The surface area of ​​the pipe cannot be fully utilized to improve heat transfer performance. Therefore, the production process of these composite finned tubes has not been reported yet.