Finned tube with indented groove base and method of forming same

Details Finned tube with indented groove base and method of forming same Finned tube with indented groove base and method of forming same

1986-10-21

1989-01-10

Lazarus, Ira S.

Heat exchange

With coated, roughened or polished surface

165179, 165184, F28F 142

Patent

active

047966939

ABSTRACT:
A tube for heat transfer systems or the like is provided which includes helically or circumferentially disposed, radially extending ribs or fins. The base of the grooves defined between adjacent fins has a plurality of discrete impressions defined therein. The provision of discrete impressions in the groove base improves the heat transfer characteristics of the tube by greatly increasing the outer surface area of the tube relative to the inner surface area of the tube.

REFERENCES:
patent: 3299949 (1967-01-01), Beurtheret
patent: 3455376 (1969-07-01), Beurtheret
patent: 3598180 (1971-08-01), Moore, Jr.
patent: 3791003 (1974-02-01), Pasternak
patent: 4159739 (1979-07-01), Brothers et al.
patent: 4179911 (1979-12-01), Saier et al.
patent: 4313248 (1982-02-01), Fiyikake
patent: 4577381 (1986-03-01), Sato et al.
patent: 4690211 (1987-09-01), Kuwahara et al.
patent: 4715436 (1987-12-01), Takahashi et al.
"Multiphase Flow and Heat Transfer", (Aug. 4-7, 1985) American Society of Mechanical Engineers.

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