Falling film type heat exchanger tube

Details Falling film type heat exchanger tube Falling film type heat exchanger tube

1999-03-12

2000-05-02

Atkinson, Christopher

Heat exchange

Tubular structure

With discrete heat transfer means

165133, 165179, F28F 136

Patent

active

060560487

ABSTRACT:
A heat exchanger tube includes ribs formed in protrusion on an internal surface of the tube and extending spirally with a suitable distance between adjacent ribs, concavities formed on the external surface of the tube and extending spirally with a suitable distance between adjacent concavities, and a plurality of independent projections formed on the external surface of the tube and laid out spirally. The projections are formed with a recess on their top surfaces in such a way that a portion aligned with the ribs on the internal surface of the tube is lower than a portion aligned with an area between the ribs. Further, the concavities on the external surface of the tube and the ribs on the internal surface of the tube are formed at mutually aligned positions.

REFERENCES:
patent: 4313248 (1982-02-01), Fujikake
patent: 4549606 (1985-10-01), Sato et al.
patent: 4715436 (1987-12-01), Takahashi et al.
patent: 5259448 (1993-11-01), Masukawa et al.
patent: 5597039 (1997-01-01), Rieger
patent: 5697430 (1997-12-01), Thors et al.
patent: 5775411 (1998-07-01), Schuez et al.

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