Enhanced heat transfer surface and apparatus and method of manuf

Details Enhanced heat transfer surface and apparatus and method of manuf Enhanced heat transfer surface and apparatus and method of manuf

1992-07-20

1993-06-29

Davis, Jr., Albert W.

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

2989005, B21D 5306

Patent

active

052222993

ABSTRACT:
An apparatus and method for producing a high performance evaporator tube having a subsurface channel formed between adjacent helical fins with the subsurface channels having alternating closed portions and open pores above the subsurface channels. The fins of the tube are rolled-over toward the adjacent fin and then contacted with a notched disc to form the alternating closed portions and open pores.

REFERENCES:
patent: 3496752 (1970-02-01), Kun et al.
patent: 3566514 (1971-03-01), Szumigala
patent: 3768290 (1973-10-01), Zatell
patent: 4438807 (1984-03-01), Mathur et al.

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