Condensor using both film-wise and drop-wise condensation

Details Condensor using both film-wise and drop-wise condensation Condensor using both film-wise and drop-wise condensation

1990-10-10

1991-09-17

Davis, Jr., Albert W.

Heat exchange

With first fluid holder or collector open to second fluid

165133, 165913, F28B 100, F28F 1304

Patent

active

050486004

ABSTRACT:
A vapor is condensed onto a condensor whose upper portion promotes film-wise condensation and whose lower portion promotes drop-wise condensation. One embodiment of this invention uses a plastic condensing tube which has a metal condensor pipe inserted into the tube in its upper end. Grooves and aperatures in the wall of the pipe encourage the flow of condensate between the pipe and plastic tube to facilitate heat conduction between the two. Heat conduction between the plastic tube and metal pipe is facilitated by a liquid such as heat-sink grease. An alternate embodiment features a plastic-only heat condensor whose upper portion is treated to make it condense the vapor as a film and whose lower portion is untreated so as to condense the vapor as drops.

REFERENCES:
patent: 3206381 (1965-09-01), Neugebauer
patent: 4314605 (1982-02-01), Sumitomo et al.
patent: 4700771 (1987-10-01), Bennett et al.
patent: 4911233 (1990-03-01), Chao et al.

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