Inner surface grooved heat transfer tube

Details Inner surface grooved heat transfer tube Inner surface grooved heat transfer tube

1998-04-24

1999-11-30

Leo, Leonard

Heat exchange

With coated, roughened or polished surface

165184, F28F 140

Patent

active

059925132

ABSTRACT:
In an inner surface-grooved heat transfer tube, a plurality of fins is formed on the inner surface thereof along a line forming a first predetermined angle with respect to the longitudinal axis of the tube, a plurality of notches is defined on the fins along a line forming a second predetermined angle with respect to the longitudinal axis, and the depth Hf' of the notches is specified to be 20% or more and below 40% (0.2.ltoreq.Hf'/Hf<0.4) with respect to the height Hf of the fins, to provide an inner surface-grooved heat transfer tube which can suppress pressure loss of a refrigerant, and by which improvements in performance of condensation and evaporation are intended. In addition no increase of power consumption is required for the pump.

REFERENCES:
patent: 4480684 (1984-11-01), Onishi et al.
patent: 4733698 (1988-03-01), Sato
patent: 5332034 (1994-07-01), Chiang et al.
patent: 5458191 (1995-10-01), Chiang et al.

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