Heat exchange tube with embossed enhancement

摘要

There is provided heat exchange tube formed from a ductile metal strip which is formed into a generally circular configuration with the opposing longitudinal edges of the strip welded together. Both surfaces of the strip are enhanced. On one surface, the enhancement constitutes parallel rows of vertical fins separated by channels. Conduits which run along the channels and are located at the base of one side of the fins facilitate bending of the fins about the fin base to form a nucleate boiling surface. On the opposing surface of the tube, the enhancement constitutes parallel rows of protrusions separated by a distance effective to generate turbulence in a fluid passing along the second surface. In a preferred embodiment, the protrusions are in the form of truncated cones.