Spiral flighted double walled heat exchanger

Details Spiral flighted double walled heat exchanger Spiral flighted double walled heat exchanger

1991-03-18

1993-08-24

Rivell, John

Heat exchange

Flow passages for two confined fluids

165169, 29890037, F28D 702

Patent

active

052380580

ABSTRACT:
A heat transfer coil and method of manufacture where a second piece of tubing is wound around a first piece of tubing while the first piece is straight, where the first piece of tubing is then formed to define the overall coil shape, and then the first and second pieces of tubing internally sized by internal pressurization to also force the two pieces of tubing into intimate contact with each other.

REFERENCES:
patent: 3739842 (1973-06-01), Whalen
patent: 4196772 (1980-04-01), Adamski et al.
patent: 4316502 (1982-02-01), Sanborn et al.
patent: 4379390 (1983-04-01), Bottum
patent: 4434539 (1984-03-01), Sanborn et al.
patent: 4739630 (1988-04-01), Tandeski et al.
patent: 4763725 (1988-08-01), Longsworth et al.

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