Finned tube is a kind of heat exchange element. In order to improve the heat exchange efficiency, fins (copper fins, aluminum fins, carbon steel fins, stainless steel fins, cast iron (cast steel) fins) are usually added to the surface of the heat exchange tube. Increase the outer surface area (or inner surface area) of the heat exchange tube to achieve the purpose of improving heat exchange efficiency, such a heat exchange tube.
The main performance requirements of the finned tube
The finned tube is used as a heat exchange element to work under high temperature and humidity conditions for a long time. For example, finned tubes for boiler heat exchangers are used in harsh environments, high temperature, high pressure, and corrosive gases. This requires the finned tube to have a high performance index.
1), anti-corrosion performance
2), wear resistance
3), low contact thermal resistance
4), high stability
5), prevent accumulation of dust
Classification of finned tubes
There are many types of finned tubes, and new varieties are constantly emerging. Generally, it can be classified according to the following aspects:
1. Classified by processing technology
1), rolled finned tube;
2), welded finned tube (high-frequency welded finned tube, submerged arc welded finned tube);
3) Roll-formed finned tube;
4), the finned tube formed by the suit;
5), cast finned tube;
6), Tension-wound finned tube;
7), finned tube with inserts.
Classified according to the shape of the fin
1) Square fin tube;
2), round finned tube;
3), spiral finned tube;
4), longitudinal finned tube
5) Corrugated finned tube;
6), spiral serrated finned tube;
7) Needle-shaped finned tube;
8), the overall plate finned tube (plate fin);
9), inner finned tube. and many more.
3. According to whether the fin material of the fin tube is the same as that of the base tube, it can be divided into:
1), single metal finned tube
2), bimetal composite finned tube
Single metal finned tubes are classified by material
1), copper finned tube;
2), aluminum finned tube;
3) Carbon steel finned tube;
4), stainless steel finned tube;
5), cast iron (cast steel) finned tube; etc.
Finned tubes are classified by purpose
1) Finned tubes for air conditioning;
2) Finned tubes for air cooling;
3) Boiler: finned tube used by water wall, economizer and air preheater;
4) Finned tubes for industrial waste heat recovery;
5), other special purpose finned tubes; etc.
