Deposition and corrosion phenomena on aluminum surfaces under deluged dry cooling-tower condisions. Interim report
Deposition and corrosion on aluminum heat exchanger surfaces resulting from deluge in wet/dry cooling towers is simulated in a laboratory Corrosion/Deposition Loop (CDL). Heat exchanger deposition buildup was found to be linearly dependent on concentration factor and number of wet/dry cycles. Deionized water rising after deluge reduced rate of deposition. Laboratory data obtained from CDL relates directly to operation of the Advanced Concepts Test (ACT) demonstration cooling tower. Technology transferable to ACT shows that deposition from supersaturated solution can be effectively controlled by attention to water chemistry, pH, water conditioning, and good heat transfer design. The additional mechanism of deposition by water film evaporation is effectively managed by soft water rinsing and uniform surface wetting. Exposure of a model TRANE surface (the ACT wet/dry exchanger) produced short-term deposition extrapolating to 0.011 mm buildup in three years. Studies continue to verify 4X as maximum cycles of concentration through control of water chemistry and rinsing after deluge. Deluge water used at ACT facility is sufficiently aggressive to warrant use of Alclad to extend tube service life.
- Research Organization:
- Battelle Pacific Northwest Labs., Richland, WA (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6480582
- Report Number(s):
- EPRI-CS-1926; ON: DE81025483
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COOLING TOWERS
CORROSION
FOULING
THERMAL POWER PLANTS
ALUMINIUM
CHEMICAL COMPOSITION
EXPERIMENTAL DATA
HEAT EXCHANGERS
WATER
CHEMICAL REACTIONS
DATA
ELEMENTS
HYDROGEN COMPOUNDS
INFORMATION
MECHANICAL STRUCTURES
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
POWER PLANTS
TOWERS
200101* - Fossil-Fueled Power Plants- Cooling & Heat Transfer Equipment & Systems