Air preheater in a combined cycle power plant

Air preheater in a combined cycle power plant 640x360

Four DuroShell heat exchangers are operating as air preheaters in an Asian combined-cycle power plant. Heating the incoming air has several positive effects, such as improved mixing of fuel and compressed air, which in turn leads to more stable combustion.

Thanks to the preheating, the burners in the gas turbine can operate under equal conditions and at the highest efficiency, which minimizes NOx and CO emissions. In addition, the burners can be controlled by one control signal and no longer need to be controlled individually.

By using DuroShell instead of shell-and tubes, the power company gets a very compact solution that was easy to install. The ability to operate with crossing temperatures and a small temperature approach means DuroShell maximizes the heating of the incoming air.


  • Maximum combustion efficiency and low emissions of NOx and CO
  • Compact solution and low installation costs
  • Maximum preheating of the incoming air

Alfa Laval DuroShell RollerCoasterRollerCoaster

Robust and efficient performance

A patented plate pattern optimizes thermal efficiency with improved fatigue resistance, flow distribution and mechanical strength. 

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Alfa Laval DuroShell PowerPackPowerPack

Optimized flow distribution and fatigue resistance

Patented design enables improved fluid distribution, mechanical strength and unparalleled fatigue resistance. 

Watch the animation to learn more about DuroShell PowerPack