EVAPORATIVE HEAT EXCHANGE APPARATUS WITH FINNED ELLIPTICAL TUBE COIL ASSEMBLY

WIPO Patent Application WO/2012/009221

A3

An improved finned coil tube assembly (24, 24A, 24B, 24C, 24D) enhances evaporative heat exchanger (26, 26A, 26B, 26C, 26D) performance, and includes tubes (10), preferably serpentine tubes, in the coil assembly. The tubes have a generally elliptical cross-section with external fins (20) formed on an outer surface of the tubes. The fins are spaced substantially 1.5 to substantially 3.5 fins per inch (2.54 cm) along the longitudinal axis (13) of the tubes, extend substantially 23.8% to substantially 36% of the nominal tube outside diameter in height from the tubes outer surface and have a thickness of substantially 0.007 inch (0.018 cm) to substantially 0.020 inch (0.051 cm). The tubes have a center-to-center spacing (DH) generally horizontally and normal to the longitudinal axis of the tubes of substantially 109% to substantially 125% of the nominal tube outside diameter, and a generally vertical center-to-center spacing (Dv) of substantially 100% to about 131 % of the nominal tube outside diameter.

BUGLER THOMAS WILLIAM (US)
VADDER DAVEY JOE (US)

PCT/US2011/043351

April 26, 2012

July 08, 2011

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EVAPCO INC (US)
BUGLER THOMAS WILLIAM (US)
VADDER DAVEY JOE (US)

F28D5/02; F28F1/02; F28F1/30; F28F1/36

JP2002257484A	2002-09-11
JP2009074713A	2009-04-09
JPH08136177A	1996-05-31
BE894754A	1983-02-14
US20070240862A1	2007-10-18
EP0119934A2	1984-09-26
US3384165A	1968-05-21

NADEL, Alan, S. et al. (One Commerce Square Suite 2200,2005 Market Stree, Philadelphia PA, US)

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