PLATE FIN FOR HEAT EXCHANGER AND PLATE FIN TUBE TYPE HEAT EXCHANGER

摘要

A sine-wave like plate fin (12) for a finned tube heat exchanger coil is provided having an improved enhanced heat transfer area between adjacent pairs of holes (16) in the plate fin (12). The enhanced heat transfer area includes a plurality of raised lance elements (36,38) disposed thereon generally at the peaks and troughs of the sine-wave wherein the raised elements (36) at the peaks are concave and the raise elements (38) at the troughs are convex.