Heat exchange – Structural installation
Patent
1991-06-03
1992-04-28
Flanigan, Allen J.
Heat exchange
Structural installation
165113, 165141, 165155, 62 93, 62 95, F28D 710
Patent
active
051079194
ABSTRACT:
An improved air dryer for pneumatic systems (10). The improved air dryer (10) employs air-to-air and an air-to-refrigerant heat exchanger portions (12-14) that are substantially parallel and coextensive. Each heat exchanger portion (12-14) is made up of a plurality of tube units (16-52), each tube unit (16-52) having three concentric tubes (22-24-26-58-60-68). The intermediate tube (60) of the air-to-refrigerant portion (14) includes a helically deformed central portion (66) to increase surface area and create turbulence within adjacent passageways (70-74). The tubes (16-52) terminate at each end in separate header units (34-40-46-80-86-92). Incoming air is passed co-currently, then countercurrently, in the-air-to-air portion (12) with air that has been dried, whereupon a pre-cooling stage is achieved. This pre-cooled air is then passed counter-currently, then co-currently, to refrigerant in the air-to-refrigerant portion (14) for causing condensation of moisture therein. This cool air is passed through a moisture separator (126), with the dried air being recycled through the air-to-air portion (12) prior to use. The components are fabricated from standard tubing elements. This configuration increases heat transfer and substantially reduces the required tubing length.
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Basseen Sanjiv K.
Harlan Richard A.
Zarif Masoud
Flanigan Allen J.
Pioneer Air Systems, Inc.
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