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The various fin tube systems of GEA Energietechnik

The GEA Energietechnik GmbH is one of the few suppliers worldwide who can offer aluminium fin steel tubes as well as galvanized steel fin tubes.

Aluminium fin steel tube system (ALEX)

Construction / form:

The ALEX system consists of an aluminium coated steel flat duct.  Aluminium finnings between the flat ducts are hard-soldered to the aluminium coating of the flat duct.  The solder fills the gap between the fin root and the core tube completely to achieve excellent heat transfer properties.

The advantages of the ALEX-System are:

• The weight of an aluminum fin tube bundle is no more than one third of the weight of an equivalent galvanized steel fin tube bundle.  The outcome is a reduction of weight in steel construction.

• The ALEX-System is our premium product in heat transfer.

• Optimal use of the complete cooling surface as no-flow regions are avoided.

• The fin tubes are not sensitive to fouling and, if necessary, easily cleaned with high-pressure water or compressed air.

• A life span of over 25 years confirmed by corrosion tests.

Galvanized steel fin tube system (A-tube)

Construction and form:

The A-tube consists of an elliptical core tube with rectangular steel finning..  Heat transfer is optimized by hot dip galvanization.  The gap between the fin root and the core tube is filled completely by zinc.

Advantages of the A-tube system are:

• It has a very long life span of over 30 years. 
• The steel fins are not sensitive to typical mechanical loads, for example hailstorm or walking on the bundles.  
• Hot dip galvanization provides corrosion protection.
   
• No-flow regions are avoided by different first and second row fin pitch.