COMPREHENSIVE STUDY OF CONVEX-LOUVER AND WAVY FIN-AND-TUBE HEAT-EXCHANGERS

A comprehensive study to investigate the heat transfer and friction ch aracteristics of convex-louver and wavy fin-and-tube heat exchangers w as carried out in this study. A total of 14 samples of heat exchangers , including seven convex-louver and seven wavy fin samples having iden tical waffle heights, were tested and compared in the present investig ation. The effects of the number of tube row and fin pitch on the ther mal-hydraulic characteristics were also reported. Results were present ed as plots of Fanning friction factor f and the Colburn j factor agai nst a Reynolds number based on a tube collar diameter in the range of 3 x 10(2) to 8 x 10(3).