Finned Tube----Spiral finned tubes with Serrated
Technology Introduction (1) technical principles pipe material from the storage system into automatic loading rack, and then install the card into the nose; strip through open open gear tooth system after installation card also enters the nose, with the card installed in the nose while steel wound pipe into frequency welding, high frequency current of the skin effect and proximity effect, heating the strip and the pipe until the plastic state or melt; at the same time a certain pressure to the strip, the welding is completed . This high-frequency welding is a solid-phase welding, the welding process by the PLC program control, this high degree of automation welding, weld fusion rate of 95% or more.
Serrated finned tubes are generally annular outer edge of the fins on the processing of a series of triangular incision, thereby forming teeth to open fin shape, which is part of the structure of innovation.
Serrated finned tube heat exchanger advantages: 1) serrated finned tube heat exchanger heat transfer coefficient is high because the presence of two open-tooth fins relatively closed gas flow together, increasing the gas turbulence, improved heat transfer effects. Studies show that, compared with the annular finned tube heat transfer effect can be increased by 15% -20%. Therefore, in the case of heat transfer the same, the heat transfer area can be saved, reducing the metal consumption. 2) hard fouling and scaling of teeth due to open there, formed between the fins is not easy to fouling and scaling. 3) can be adapted to changes in the gas flow direction.
Serrated finned tube heat transfer is a new original from the original assembly of the heat exchanger it is in energy conservation, especially in terms of waste heat recovery effect is very significant. Application of this original heat exchangers made of heat in the furnace waste heat recovery of up to 26%. In the waste heat boiler in a coal-fired heating period cost savings can be heat exchanger full cost recovery.
Key Words: Finned Tube, Fin Tubes, Extruded Fin Tubes, Embedded Fin Tube, L Fin tube, Tubos Aletados