Thermal performance of an open atmospheric spray pond or canal depends on the direct-contact evaporative cooling of an individual spray unit (spray nozzle or module) and the interference caused by local heating and humidification. Droplet parameters may be combined into a dimensionless group, number of transfer units (NTU) or equivalent, whereas large-scale air-vapor dynamics determine interference through the local wet-bulb temperature. Quantity NTU were implied from field experiments for a floating module used in steam-condenser spray canals. Previous data were available for a fixed-pipe nozzle assembly used in spray ponds. Quantity NTU were also predicted using the Ranz-Marshall correlations with the Sauter-mean diameter used as the characteristic length. Good agreement with experiments was shown for diameters of 1–1.1 cm (module) and 1.9 mm (fixed-pipe nozzle).
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Unit Thermal Performance of Atmospheric Spray Cooling Systems
R. W. Porter,
R. W. Porter
Illinois Institute of Technology, Chicago, Ill.
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M. Jain,
M. Jain
Illinois Institute of Technology, Chicago, Ill.
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S. K. Chaturvedi
S. K. Chaturvedi
Old Dominion University, Norfolk, Va.
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R. W. Porter
Illinois Institute of Technology, Chicago, Ill.
M. Jain
Illinois Institute of Technology, Chicago, Ill.
S. K. Chaturvedi
Old Dominion University, Norfolk, Va.
J. Heat Transfer. May 1980, 102(2): 210-214 (5 pages)
Published Online: May 1, 1980
Article history
Received:
July 27, 1979
Online:
October 20, 2009
Citation
Porter, R. W., Jain, M., and Chaturvedi, S. K. (May 1, 1980). "Unit Thermal Performance of Atmospheric Spray Cooling Systems." ASME. J. Heat Transfer. May 1980; 102(2): 210–214. https://doi.org/10.1115/1.3244262
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