The accelerated particulate fouling data were provided in five 15.54 mm I.D. copper, helically ribbed tubes taken at the condition of Re=16 000 and 1 300 g/m3 concentration. The geometries of the helicalrib tubes provide a class of internal enhancement that is typical of commercially enhanced tubes presently used in water chillers, and the ranges of geometric parameters are number of rib starts (10 to 45), helix angle (25° to 45°), and helix height (0.33 to 0.55 mm). Aluminum oxide particles with 3.0 μm average particle diameter were used as foulant in the experiment. The mass transfer coefficient was obtained by using the VonKarman analogy and the wall shear stress was obtained from pressure drop data. Based on the above two approaches, a semitheoretical model was developed to investigate the effects of geometric parameters and efficient indexes on the fouling characteristics in the enhanced heat transfer tubes. The correlations and the analyses can be used directly to assess the fouling potential of helicallyrib in cooling water systems.