Method of manufacturing high efficiency heat exchange tube

Details Method of manufacturing high efficiency heat exchange tube Method of manufacturing high efficiency heat exchange tube

1988-12-28

1989-10-03

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291573H, 291574, 29726, B21D 5302

Patent

active

048707341

ABSTRACT:
A high thermal efficiency multi-wall heat exchange tube is sealed at one end and has the gap between the tube walls filled with a silicon liquid oil that is nontoxic, has a boiling point above that of water, and increases heat transfer efficiency between the inner and outer walls of the tube. The liquid oil is inserted into the gap between the tube walls by placing the tube into a fixture which receives ten tubes simultaneously, heating the tube and the oil, evacuating the gap and inserting oil into the evacuated gap. The fixture includes a manifold connector assembly which is sealingly positioned over the open end of the one or more tubes to provide a manifold connection between the gap of each tube being filled and a source of vacuum as well as a source of oil and a drain. A hydraulic ram facilitates connection and removal of the manifold connector assembly.

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