SPX Cooling Technologies Inc. incorporated a proprietary Aero-X coil technology into its induced-draft, closed-circuit DT fluid coolers. The Aero-X tube profile maximizes thermal capacity per coil row, says the company.

Dry operation is extended for longer periods with switch point temperatures up to 10°F higher than other similar closed-circuit cooling towers, according to the manufacturer. Depending on climate, operators can gain up to 15 to 20 percent more incremental annual hours in dry mode, with 3,000 gal/ton and $40/ton annual water savings per ton of cooling achievable in many areas.