Air preheater in a combined cycle power plant Power plant, Asia Case story 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 com- pressed 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

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