GEA Heat Exchangers / Global

Air Fin Coolers

Finned Tube Types

  • Groovy Fin tube type
  • Extruded tube type
  • L Fin tube type
  • FE/KE/AE tube types
  • XE tube type
  • PI/HI tube type

Further Details on GEA Finned Tubes

Groovy Fin

Product benefits:

  • New patented high-performance finned tube, pioneering technology
  • Resists high loads, both thermally and mechanically
  • Extremely dimensionally stable
  • Hardly any maintenance is required – maximum reliability
  • Optimised surface, less fans – clearly reduced energy consumption
  • Less space required, less cabling – less installation effort
  • Economically very profitable – saves labour, material and costs

Design:
The fin strip is subject to tensile stress and inserted into a pre-shaped spiral core tube groove and firmly rolled into the groove in a rolling process using high pressure. The displaced material is then pressed on the fin side.

Fin material: aluminium

Core tube material: all materials which can be easily machined.

Maximum operating temperature: 400°C

Extruded

Product benefits:

  • Compared with similar fins, extruded fins consist of more than 40% more aluminium, thus the core tube is very well protected against atmospheric corrosion
  • Very sturdy design – resists mechanical damage very well
  • Easy to clean with steam or water
  • Different core tube materials for different requirements – can be used with almost all chemically aggressive media

Design:
The fins are rolled from a hollow blank tube slid over the core tube. In this process, the inner diameter of the hollow blank tube is reduced and at the same time, the tube is pressed on the core tube.

Result: a mechanically solid joint with good heat transfer properties

Fin material: aluminium

Core tube material: all metal materials

Maximum operating temperature: 300°C

L Fin

Product benefits:

  • Large contact area between tube and fins enable good heat transfer
  • Developed for low temperatures necessitating a certain corrosion protection of the tube wall

Design:
The fin base is pre-shaped to form a L and wrapped around the core tube while applying tensile stress. Every fin has contact with an adjoining fin. This protects the core tube when handling less aggressive media. In addition, the manufacturing process enables the use of relatively thinwalled core tubes.

Fin material: aluminium

Core tube material: All metal materials can be used.

Maximum operating temperature: 130°C

FE/KE/AE

Product benefits:

  • The elliptic shape enables excellent thermodynamic properties
  • Less vortex formation results in reduced pressure loss on the air side
  • Additional baffle surfaces/turbulators achieve very good heat transfer coefficients
  • Rectangular fins ensure that the face area remains small and that the design volume is used optimally
  • Wide galvanized fin collar for excellent heat transfer and absolute insensitivity to thermal and mechanical loads
  • Galvanization in a dipping bath provides optimum corrosion protection
  • Easy to clean with high-pressure water

Design:
The fins are punched first and then automatically installed on the tube, followed by complete galvanization in a dipping bath.

Fin material: Steel

Core tube material: Steel / stainless steel

Maximum operating temperature: 360° C

XE

Product benefits:

  • Special design for high pressure ratings and restricted space
  • The excellent properties of galvanized tubes with steel fins are combined with the geometry of round tubes, resulting in high rigidity
  • Reduced size due to design featuring two tubes in one fin
  • Easy to clean with high-pressure water without damaging the fins.

Manufacturing: similar to FE tube

Fin material: Steel

Core tube material: Steel/stainless steel

Maximum operating temperature: 360 °C

PI/HI

Product benefits:

  • Thermodynamic properties and air-side pressure losses are similar to the FE tube type
  • Larger clearance between the elliptic core tubes for applications with increased soiling hazard – provides good cleaning possibilities
  • Is preferably used for combustion air heaters and air coolers

Design:
The steel strip is wrapped around the core tube as a spiral. Subsequent hot-dip galvanizing ensures heat transfer and corrosion protection.

Fin material: Steel

Core tube material: Steel/stainless steel

Maximum operating temperature: 360 °C