Heat transfer pipe

Details Heat transfer pipe Heat transfer pipe

1986-09-09

1988-03-29

Bryant, III, James E.

Pipes and tubular conduits

With flow regulators and/or baffles

Heat transfer

165177, 165179, F28F 140

Patent

active

047336986

ABSTRACT:
A heat transfer pipe having in an inner surface thereof a plurality of first internal grooves formed in parallel with each other and having a generally rectangular cross sectional shape, and a plurality of second internal grooves formed in parallel with each other and crossing the first internal grooves, the second internal grooves having a cross section which is generally in the shape of an inverted trapezoid, the heat transfer pipe further having the following portions defined by the above first and second internal grooves; tunnel portions formed in the portions where the first internal grooves cross the second internal grooves, the tunnel portions each having a space; discontinuous projecting portions formed at the portions crossing the portions between the first internal grooves, the discontinuous projecting portions being parallel to the second internal grooves and each having a generally triangular cross section; and including opening portions of the first internal grooves formed in the intermittent portions of the projecting portions.

REFERENCES:
patent: 2279548 (1942-04-01), Bailey
patent: 3402767 (1968-09-01), Bohdonsky et al.
patent: 3750709 (1973-08-01), French
patent: 3885622 (1975-05-01), Mclain
patent: 4690211 (1987-09-01), Kuwahara et al.

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