Effect of circumferential rib on film condensation on a horizontal two-dimensional fin tube

摘要

A theoretical study has been made of the effect of a circumferential rib on the condensation heat transfer performance of a horizontal two-dimensional fin tube. Numerical calculation was performed for systematically changed values of rib parameters with HCFC-123 as the working fluid. Numerical results are compared with six classes of fin profiles that were proposed in previous studies. The results showed that circumferential ribbing is effective in enhancing film condensation. The effect was more significant for a double rib fin than for a single one. For a typical combination of geometrical parameters of the fin, the average heat transfer coefficients about 58 and 27 higher than the best performing fin profile proposed in the previous studies were obtained using the double rib fin and the single rib fin, respectively.