Hamon Group

Integrated solutions for a clean environnement

Natural Draft

The natural draft cooling tower is the right choice for large power plants.

It offers the following advantages :

  • power saving (no power consumption to induce air flow- no fan)
  • environmentally friendly
  • no mechanical noise (no fan)
  • safety of operation
  • no recirculation as the plume is rejected at high level
  • limited plot area
  • limited maintenance
  • high longevity (generally more than plant life expectancy)
  • Payback period between 8 and 16 years depending on several factors


Hamon has built more than 300 natural draft cooling towers worldwide in various climate and geographical conditions.

Natural draft cooling towers with water collecting devices

Hamon offers both basin or water collecting devices. This last solution, developed by Hamon, is recommended for large cooling towers.
It offers the following advantages :

  • less pressure drop in the air inlet
  • reduction of pumping power
  •  decrease of acoustic pressure in air inlet