Thermal-flow characteristics of the new wave-finned flat tube bundles in air-cooled condensers

► A new configuration of wave-finned flat tube bundle is proposed. ► The fin surface rotates to be perpendicular to prevent fouling from gathering on it. ► The effects of fin pitch, height and Re on the thermo-flow performances are studied. ► The buoyancy should be considered for the correlation of friction factor at low Re. ► But this buoyancy force can be ignored for the Nusselt number.