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ALEX-System
Aluminium Finned Steel Tube System

PATENTED SELF-SUPPORTING FINNED TUBE BUNDLE

The ALEX system of ENEXIO 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.

Conventional fin tube bundles need A-supports to carry the weight of tube bundles but the patented ENEXIO self-supporting fin tube bundle with integrated headers needs no support: There are only separation walls and hoist beams needed which results in material savings and a very low erection time.

  • Own Heat Exchanger bundle production
  • Bundle preassembly at ground level
  • Only one small crane needed (1 big lift = 2 bundles)

YOU CAN TRUST THE EXPERTS

Manual hand welding

  1. No guarantee of continuously welding
    quality can insured.
  2. Higher risk of manual welding defects

Robot welding

  1. Robot welding meets always same quality standards
  2. Less welding defects with robot.
  3. Increased productivity in tube-to-sheet welding

ALEX Single row tube design with aluminium finned flat shaped tubes

PATENTED SELF-SUPPORTING FINNED TUBE BUNDLE

  • The Construction of the tube bundle for heat rejection, forms the heart and mind of Air Cooled Condenser design
  • Critical manufacturing process creating the metallurgical bonding of aluminium fins to large cross section of flat steel tubes is achieved by critical brazing process technology
  • The brazing process assures high strength and corrosion resistance with assurance of 100% bonding through the lifetime
  • The fin geometry and design is optimized using finite element analysis and extensive thermal performance measurement
  • The performance of single row condenser is thus achieved for maximum heat transfer efficiency and minimum fan power consumption
  • The fins compactness and sturdiness ensure structural integrity while ensuring superior thermal performance
  • The parallel and plane nature of fin tube construction uniquely ensures low fouling and time spans between cleaning cycles can be longer than with other conventional single-row designs
  • Due to its high strength fin design and unlike other single row tubes bundles, the ENEXIO ALEX Tube Bundle can be cleaned with pressure water jet, achieving very thorough cleaning with reduced cleaning water consumption.

REFERENCES AROUND THE GLOBE

A5
A1
A2
A3
A4

PHYSICAL CHARACTERISTICS

  • Flat shaped steel with aluminium cladding
  • Meandering form of aluminium
  • Connection by brazing
  • Single tube row design
  • Tube ends welded to tube sheets

KEY FACTS

  • Bonding by brazing
  • Bundle preassembly at ground level
  • Self-supporting structure eliminates tube support straps, side walls, and A-frame for tube bundle support
  • Zero dead zone
  • High resistance to corrosion
  • High stability
  • Tube design and fin geometry allow a design with lower fan power consumption and corresponding lower sound power level
  • Excellent heat transfer properties
  • Low steam side pressure drop
  • High pressure fin cleaning possible – Smooth fins have a reduced tendency to fouling
  • Life span of 25 years (checked by corrosion test)

ENEXIO is a reflection of what we do and what we have accomplished as pioneer in the field of industry, process, and power plant cooling over decades.

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