What’s the matter with finned tubes
A finned tube is a heat exchange element. In order to improve the heat exchange efficiency, fins are usually added on the surface of the heat exchange tube to increase the outer surface area (or inner surface area) of the heat exchange tube, so as to achieve the purpose of improving the heat exchange efficiency, such a heat exchange tube.
Main performance requirements
As a heat exchange element, finned tubes work in high temperature flue gas conditions for a long time. For example, finned tubes for boiler heat exchangers are used in harsh environments, high temperature and high pressure and in a corrosive atmosphere. This requires finned tubes to have high performance. index.
1), anti-corrosion performance (Anti-corrosion)
2), wear resistance (Anti-wear)
3), low contact thermal resistance (lower contact resistance)
4),Higher Stability
5), anti-fouling ability
Wound Finned Tube
Classification of finned tubes
There are many types of finned tubes, and new ones are constantly emerging. Generally, it can be classified according to the following aspects:
1. Classification by processing technology
1), extruded fin tube;
2) Welding and forming finned tubes (high frequency welded finned tubes, submerged arc welded finned tubes);
3), roll forming finned tube;
4), set the finned tube;
5), casting finned tube;
6), tension winding finned tube;
7), insert tube.
High frequency welding finned tube
Classification by fin shape
1), Square finned tube;
2), circular finned tube;
3), spiral finned tube;
4), Longitudinal Finned Tube
5), corrugated finned tube;
6) Helical Serrated Finned Tubes;
7), needle 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 finned 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 tubes etc.
Classification by use
1), finned tubes for air conditioners;
2), finned tube for air cooling;
3) Boiler: finned tubes used for water wall, economizer and air preheater respectively;
4), finned tubes for industrial waste heat recovery;
5), other special purpose finned tubes; etc.