8
In transitioning from maximum thermal performance to maximum plume abate-
ment, the hot and cold water temperatures will rise. Care must be exercised
to ensure that the water temperatures do not rise above 125°F or a lower limit
defined by the user's process.
PARTIAL PLUME ABATEMENT MODE
–When managing maximum water tempera-
tures and reducing plume, the tower may be operated in partial plume abatement mode.
Position the vent doors in the closed position. Initially place the dry dampers in the
closed position and let the water temperatures stabilize. If the water temperatures are
too high, then open the vent doors for maximum cooling. If the water temperatures are
below maximum acceptable temperatures, adjust the dry dampers incrementally open
until either the plume is acceptable or until maximum water temperatures are reached.
Reference ClearSky Operation Logic Diagram and Notes on pages 10 and 11.
Partial section showing the ClearSky plume abatement components
HOT WATER DISTRIBUTION SYSTEM
–Maintain uniform water distribution at the
nozzles (uniform spray cone). The amount of water circulated should approximate the
contract requirements and the nozzle pressure should be kept constant. Lower pres-
sures may indicate excessive losses in the piping system and/or insufficient pump
capacity; greater pressures might indicate clogged nozzles and/or overpumping. If a
greatly reduced water flow rate is desired, it may be advisable to change nozzle sizes
Caution
Note
Figure 3
operation
CLEARSKY
HEAT EXCHANGERS
DRY DAMPER
WET AIR DUCT
VENT DOOR—SHOWN OPEN TO
VENT WET AIR INTO DRY DUCT
WALL REMOVED AT DASHED
LINES TO SHOW INTERNAL
FEATURES
DRY AIR DUCT
WET AIR DUCT
