Aluminium Finned tube evaporator

Aluminium Finned tube evaporator

1, what is the fin tube
Finned tube, also known as extended surface tube, and also known as ribbed tube, due to the fins or ribs are placed on the the tube surface , so that the original heat transfer area has been expanded, so the finned tube also known as heat transfer tube with extended surface, and the fin also be called extended surface.



2, finned tube heat transfer principle
By adding fin on the surface of the heat exchange tube, the external surface area (or internal surface area) of the heat exchange tube is increased, so as to achieve the purpose of improving the heat exchange efficiency. A) The "bottleneck" effect of the heat transfer surface before adding the fins. B) After adding fins, the "bottleneck" is eliminated and the heat flow is greatly increased.

3, the type of finned tube
Circular finned tube; spiral finned tube; corrugated finned tube; spiral serrated finned tube; monolithic finned tube (plate fin); longitudinal finned tube;

4, the main performance requirements of finned tubes and advantages:
Finned tubes as the original heat exchanger, long-term work under the high temperature flue gas conditions, such as the boiler heat exchanger with a poor use of the finned tube, high temperature and pressure and in a corrosive atmosphere, which requires the fin tube should have what kind of performance index?
1) Anti-corrosion properties 2) Abrasion resistance 3) Lower contact resistance 4) High stability 5) Anti-fouling ability

Advantages of finned tubes:
1) The equipment is compact and reduces metal consumption, while making material selection and utilization more reasonable.
2) to reduce scaling, and in the role of the expansion and contraction of the fins, so that the formation of hard dirt will fall off.