Steel-aluminum composite finned tubes are cold-rolled composite formed by pressure-resistant base tubes and aluminum tubes on a special machine tool, which overcomes the disadvantage that aluminum and other metals cannot be welded.

It is also called bimetallic finned tubes, heat exchange tubes, and heat dissipation tubes. , Rolled sheet tube. It utilizes the pressure resistance of the base tube and the high-efficiency heat transfer of aluminum; the plasticity highlights the characteristics of the two materials in terms of craftsmanship.

Steel-aluminum composite finned tubes have incomparable advantages over other types of finned tubes.

(1) Light weight. The specific gravity of aluminum is the smallest among commonly used non-ferrous metals and ferrous metals, and the fin material of light metal determines that the heat exchanger made of it has the characteristics of light weight.

(2) High heat transfer performance. The thermal conductivity of aluminum is about 211.9W/m.K, which is lower cost and more cost-effective than silver copper.

Objects with good thermal conductivity tend to absorb heat quickly and dissipate heat quickly.

(3) Small air resistance. After the steel-aluminum composite finned tube is processed, the fin surface is smooth and wrinkle-free. Air can easily penetrate from within the fin spacing.

(4) Low thermal contact resistance. Practice has proved that the contact thermal resistance of the steel-aluminum composite finned tube is almost zero in the working environment below 210 degrees.

Low thermal contact resistance is the performance guarantee for efficient heat transfer.

(5) The heat dissipation area is large. The finning ratio of steel-aluminum composite finned tubes can reach up to 22.7.

The unit heat dissipation area is much larger than that of conventional fin-wrapped heat pipes.

(6) Long service life. During the processing of steel-aluminum composite finned tubes, the base tube and aluminum fins are tightly combined into one.

And a 0.5mm-thick cladding layer is formed on the surface of the substrate tube to protect the substrate tube from contact with the external ambient air, which can increase the service life.

(7) Steel-aluminum composite finned tubes are also not easy to dust and scale. It is easy to clean and remove surface water, has good resistance to temperature changes, and can maintain good heat transfer performance for a long time.