Cooling tower performance evaluation: Merkel, Poppe, and e-NTU methods of analysis
Journal of Engineering for Gas Turbines and Power
Department of Mechanical Engineering, University of Stellenbosch, Stellenbosch 7600, South Africa
The heat rejected and water evaporated in mechanical and natural draft cooling towers are critically evaluated by employing the Merkel, Poppe, and e-number-of-transfer-units (e-NTU) methods of analysis, respectively, at different operating and ambient conditions. The importance of using a particular method of analysis when evaluating the performance characteristics of a certain fill material and subsequently employing the same analytical approach to predict cooling tower performance is stressed. The effect of ambient humidity and temperature on the performance of cooling towers employing the Merkel, e-NTU, and Poppe methods of analysis are evaluated. Copyright © 2005 by ASME.
Atmospheric humidity; Computational methods; Cooling systems; Evaporation; Cooling tower performance evaluation; Heat rejection; Water evaporation; Cooling towers; cooling