Enhanced heat transfer surfaces

Details Enhanced heat transfer surfaces Enhanced heat transfer surfaces

1988-03-14

1989-07-11

Fogarino, Margaret A.

Heat exchange

With coated, roughened or polished surface

428148, F28F 1300

Patent

active

048462675

ABSTRACT:
Aluminum alloys suitable for fabrication into plate and fin type heat exchangers are subjected to a chemical etching procedure in order to improve the heat transfer efficiency thereof. Applicants have found that a high temperature heat treatment of an aluminum alloy plate material to produce a precipitate, followed by exposure to an etching composition, results in a heat exchanger surface modified by the formation of pits. The heat exchangers so modified may be advantageously used in the reboiler/condensor section of air separation units.

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