Unit to enhance heat transfer through heat exchanger tube

Heat exchange – With first fluid holder or collector open to second fluid

Patent

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Details

165182, 165184, 165913, 62290, F28B 908

Patent

active

051599759

ABSTRACT:
A unit to enhance heat transferring through a tube in a condenser-type heat exchanger comprises a series of elements. The elements engage a surface of the tube in contact with a high temperature condensable medium flowing through the exchanger. The elements are spaced apart, positioned parallel and have ring-like configurations. The elements are positioned on an angle so that when the unit is secured to a vertical tube, each element has a low point. These low points align and connect with a vertical riser. In use the tube is one of a set forming a tube bundle fitted into a vessel of the heat exchanger. As heat transfers from the high temperature medium, for example steam flowing through the vessel to a lower temperature medium, for example cooling water flowing through the tubes, the steam condenses on the tube. The condensed steam builds into a thickening film that then flows down the tube. This downward condensate flow is diverted by the elements of the unit and runs to the low point of each element. At the low points the condensate then drains down the riser to collect in a bottom of the vessel for discharge.

REFERENCES:
patent: 496757 (1893-05-01), Theisen
patent: 2983115 (1961-05-01), Caswell
patent: 3358750 (1967-12-01), Thomas
patent: 3508608 (1970-04-01), Roe
patent: 4253519 (1981-03-01), Kun et al.

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