Air dryer for pneumatic systems

Details Air dryer for pneumatic systems Air dryer for pneumatic systems

1985-08-16

1987-01-27

Cline, William R.

Heat exchange

Structural installation

165141, 165113, 62 93, 62 95, F25D 1706, F28D 710, F25J 308, F28B 910

Patent

active

046388524

ABSTRACT:
A heat exchanger for dehumidification of compressed air. The improved heat exchanger employs an air-to-air heat exchanger portion and a air-to-refrigerant heat exchanger portion that are arranged substantially parallel and coextensive. Each of these heat exchanger portions are made up of a plurality of tube units, each tube unit having three concentric tubes. The tubes terminate at each end in separate header units. Incoming air is passed co-currently in the air-to-air heat exchanger portion with air that has been dehumidified, whereupon a precooling stage is achieved. This precooled air is then passed countercurrently to refrigerant in the air-to-refrigerant portion of the heat exchanger for causing condensation of moisture therein. This cool air is passed through a moisture separator, with the dehumidified air being recycled through the air-to-air heat exchanger portion prior to use, as set forth above. The components are fabricated from standard tubing elements. The use of the triple concentric tubing to produce two heat exchange surfaces per tube unit substantially reduces the required tubing length. This reduction and increased heat transfer results in a savings of materials of at least 50 percent over that employing duplex heat exchange tubing and other heat exchanger configurations of the prior art.

REFERENCES:
patent: 826773 (1906-07-01), Engleitner
patent: 938779 (1909-11-01), Morrison
patent: 2643863 (1953-06-01), Buschow
patent: 2682157 (1954-06-01), Boling et al.
patent: 3583415 (1971-06-01), Smith
patent: 3722583 (1973-03-01), Fiedler
patent: 3734174 (1973-05-01), Bloxham et al.
patent: 4193443 (1980-03-01), Nanaumi et al.
patent: 4235081 (1980-11-01), Dowling
patent: 4242877 (1981-01-01), Geerkens
patent: 4253315 (1981-03-01), Fiedler

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