Patent ID: 8459342
Filing Date: 2013-06-11
Classification: F24H,F28D,F28F

Abstract:
1. A heat exchanger apparatus comprising at least one single piece tubular member having a generally circular cross section, said tubular member further comprising a restricting and turbulating structure, said structure comprising at least one opposing pair of obstructions having a generally parabolic dimple shape disposed within said tubular member, each obstruction having a longitudinal dimension and a transverse dimension, said longitudinal dimension being greater than said transverse dimension, said longitudinal dimension extending in a direction substantially parallel to a center line of said tube and wherein the obstructions of each pair of obstructions are offset with respect to each other each of said obstructions having an innermost region that projects into said tubular member a predetermined distance, and wherein a transverse spacing between the innermost regions of said obstructions is less than or about equal to 12% of the diameter of the tubular member, said predetermined distance being less than or equal to said center line of said tube to form a restricted passage therebetween through which a fluid may flow, the extent of restriction posed by said restricted passage being determined by the longitudinal spacing of the offset obstructions that comprise a pair, said pair of obstructions further forming a pair of adjacent, longitudinally extending, converging, diverging nozzles separated by said restricted passage, each of said nozzles having an aperture through which said fluid flows, said converging, diverging nozzles dividing and conducting fluid flow around said innermost regions of said obstructions.