Grooved tubes for heat exchangers that use a single-phase fluid

Details Grooved tubes for heat exchangers that use a single-phase fluid Grooved tubes for heat exchangers that use a single-phase fluid

2007-09-11

2007-09-11

Ciric, Ljiljana (Department: 3744)

Heat exchange

Tubular structure

Projecting internal and external heat transfer means

C165S177000, C165SDIG051, C165S184000, C138S038000, C029S890046, C029S890048

Reexamination Certificate

active

10853799

ABSTRACT:
Grooved metal tubes, with a groove-bottom thickness Tfand outside diameter De, internally grooved with N helical ribs having an apex angle α, height H, base width LN, and helix angle β, two consecutive ribs being separated by a groove, generally flat-bottomed, having a width LR, with a pitch P equal to LR+LN, are characterized in that:a) the thickness Tfof the tube is such that Tf/De is equal to 0.023±0.005, Tfand De being expressed in mm, with De ranging between 4 and 14.5 mm;b) the ribs have a height H such that H/De is equal to 0.028±0.005, H and De being expressed in mm;c) the number N of ribs is such that N/De is equal to 2.1±0.4, and the corresponding pitch P is equal to p·Di/N, with Di equal to De−2·Tf, and De being expressed in mm;d) the base widths LNand LRare such that LN/LRis between 0.20 and 0.80;e) the apex angle α ranges from 10° to 50°; andf) the helix angle β ranges from 20° to 50°.

REFERENCES:
patent: 4044797 (1977-08-01), Fujie et al.
patent: 4480684 (1984-11-01), Onishi et al.
patent: 4545428 (1985-10-01), Onishi et al.
patent: 4938282 (1990-07-01), Zohler
patent: 5010643 (1991-04-01), Zohler
patent: 5219374 (1993-06-01), Keyes
patent: 5259448 (1993-11-01), Masukawa et al.
patent: 5628447 (1997-05-01), Ziemek
patent: 5690167 (1997-11-01), Rieger
patent: 5692560 (1997-12-01), Messant et al.
patent: 5704424 (1998-01-01), Kohno et al.
patent: 5791405 (1998-08-01), Takiura et al.
patent: 5934128 (1999-08-01), Takiura et al.
patent: 6018963 (2000-02-01), Itoh et al.
patent: 6662860 (2003-12-01), Iwamoto et al.
patent: 7048043 (2006-05-01), Leterrible et al.
patent: 0148609 (1985-07-01), None
patent: 701-680 (1996-03-01), None
patent: 52-38663 (1977-03-01), None
patent: 55-18018 (1980-02-01), None
patent: 57-58088 (1982-04-01), None
patent: 57-58094 (1982-04-01), None
patent: 62-25959 (1987-02-01), None

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