Role of Fin in Finned Air Radiator

Role of Fin in Finned Air Radiator

 The role of fins is to increase the heat dissipation area of the radiator, i.e. to increase the contact surface with the air, so as to improve the heat transfer efficiency of the finned air radiator, compared with the pure base tube without fins, the heat transfer efficiency has been greatly reduced, and the steel fins are used most frequently in the practical application.

  Finned tube radiator application is very wide, generalised to say that the air heating and cooling two categories of applications, air heating radiator applications are: centralised air heating, plant heating, food, medicine drying; cooling is mainly based on the industrial needs of the available water cooling wind, can be used to cool the wind, also can be used to cool the wind water.

Finned radiator commonly used materials are: steel, steel-aluminium composite, copper, copper-aluminium composite, stainless steel. Steel that is the steel tube around the steel fins, steel-aluminium composite that is the steel tube rolled aluminium fins, copper that is the copper tube around the copper fins, copper-aluminium composite that is the copper tube rolled aluminium fins, stainless steel that is the stainless steel tube around the stainless steel fins.

1, winding finned tube: the use of strong winding process, the combination of the tube sheet is tight, the distance between the pieces of uniform, small folds, not easy to accumulate dust.

2, L-type finned tube: winding process, high production efficiency, uniform spacing, good heat transfer, high finning ratio, the base tube can be protected from air erosion.

3, hot-dip galvanised finned tube: on the basis of straight winding finned tube, hot-dip galvanised process is adopted, with close combination of tube sheets, even sheet spacing, small folds, not easy to accumulate dust, firm fins and fast heat transfer.

4、Phosphorus-copper brazing finned tube: on the basis of straight-winding finned tube, adopting phosphorus-copper brazing process, copper tube-copper sheet is firmly welded, welding rate 100%, no contact thermal resistance, heat transfer, can be used for a long time under high temperature working conditions.

5, High frequency welding finned tube: on the basis of straight winding finned tube, using high frequency welding process, tube sheet welding rate is high, contact heat resistance is small, folds are small, not easy to accumulate dust, can be welded on carbon steel and stainless steel and other metals.

6, Nickel-based layer brazing finned tube: on the basis of straight winding finned tube, using brazing process, welding rate of 100%, good heat transfer performance, there is no contact thermal resistance, the tube sheet joint force, vibration and impact resistance, nickel-based brazing can be welded to different materials, dense layer of seepage, non-skinning, high surface hardness, can be used for a long time at high temperatures, high flow rate of corrosive media washout.

7, Elliptical finned tube: the use of winding and brazing process, high production efficiency, tube welding firm, no contact thermal resistance, can be used for a long time in high-temperature environments, the composition of the heat exchanger in the same area of heat transfer, heat transfer than the circular finned tube 30% higher than the air-side resistance than the circular finned tube is 50% smaller than the effective reduction in the operating costs of the fan, applications: mainly used in electric power, oil refining, metallurgy, chemical industry and other fields. Application: Mainly used in electric power, oil refining, metallurgy, chemical industry, etc.

8, Rolled finned tube: high heat transfer performance, small contact thermal resistance. Fin and tube contact area is large, close and secure. Good resistance to atmospheric corrosion, stable performance in long-term use.