Heat transfer tube including enhanced heat transfer surfaces

Details Heat transfer tube including enhanced heat transfer surfaces Heat transfer tube including enhanced heat transfer surfaces

2007-12-25

2007-12-25

Leo, Leonard R (Department: 3744)

Heat exchange

With coated, roughened or polished surface

C165S184000

Reexamination Certificate

active

10972734

ABSTRACT:
The invention relates to enhanced heat transfer surfaces and methods and tools for making enhanced heat transfer surface. Certain embodiments include a boiling surface that include a plurality of primary grooves, protrusions and secondary grooves to form boiling cavities. The boiling surface may be formed by using a tool for cutting the inner surface of a tube. The tool has a tool axis and at least one tip with a cutting edge and a lifting edge. Methods for making a boiling surface are also disclosed, including cutting through the inner surface of a tube to form primary grooves, then cutting and lifting the inner surface to form protrusions and secondary grooves.

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