Power Plant Spray Cooling: Design and Performance Studies

[+] Author and Article Information
S. J. Palaszewski

Bell Laboratories, Whippany, NJ 07981

S. Weinbaum, L. M. Jiji

Department of Mechanical Engineering, The City College of the City University of New York, New York, NY 10031

J. Eng. Gas Turbines Power 107(3), 582-589 (Jul 01, 1985) (8 pages) doi:10.1115/1.3239776 History: Received December 01, 1983; Online October 15, 2009


A new three-dimensional model for determining the flow and thermal characteristics of spray units is utilized in an effort to predict and improve the cooling efficiency of spray units. In a marked departure from present theories, which are based on the behavior of an average droplet in a uniform average environment, the model examines the local variation in properties of both the air and the droplets throughout the flow field encompassing the spray umbrella. Model predictions of droplet return temperature along the spray perimeter, downwind wet-bulb temperature, and downwind air-velocity were compared with field data on a commercial spray. Good agreement was observed. A parametric study was then performed to determine the optimum droplet size and discharge angle for a spray unit. It was found that substantial improvements in the cooling obtained for a given spray power input can be achieved over currently used floating spray units.

Copyright © 1985 by ASME
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