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Abstract The influence of Sb on the fouling factor was considerable only for the tUbes with the highest fin-height (1. 5 mrn) • At both clean and fouled conditions, the highest enhancement ratios were corresponding to 1.0 mm Ih comparing to 0.5 and 1.5 mID Ih • The maximum enhancement ratio, (Ufo /U) was 1.45 for I.n p the clean condition while it was 1.36 for the fouled. * factor, Rf at the0.140 m2K/kW and 0.125 m2K/kW at fluid velocity of 0.34 m/s and 1.0 m/s respectively. Also, the later value of Rf can be taken for the finned surface, when a suitable inter-fin. |