Abstract
A theoretical study has been performed to optimize the fin geometry of a horizontal low-finned condenser tube. Three classes of two-dimensional fins without circumferntial variation in the fin crosssection were considered. These included a parabolic fin, a rectangular fin with a round corner at the fin tip, and a newly proposed fin profile with a monotonically increasing radius of curvature near the fin tip and a constant thickness near the fin root. Curvilinear coordinates were used to describe the basic equations for the condensate film. Extensive numerical calculations with systematically changed values of geometric parameters were made of laminar film condensation on the three classes of fins with R11 and R123 as condensing fluids. Comparison of the numerical results revealed that the highest heat transfer performance was provided with the newly proposed fin. Numerical results were also presented that showed the effect of thermal conductivity of the fin material on the optimum fin geometry of the newly proposed fin.
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