International Scientific Journal


Generated power of thermal power plant is closely related to efficient work of cooling towers, via condenser pressure affected by output temperature of cooling water. Performance characteristics of cooling system can be rated via several parameters such as: thermal effectiveness, Merkel number, number of transfer units, and overall heat and mass transfer coefficient. Results gathered during acceptance test of cooling system of thermal power plant Kakanj (unit 7) which consists of 12 wet counterflow induced draft cooling towers, are used to evaluate its most important performance characteristics. It is shown that some tower performance characteristic vary during the day more than others due to their dependence on climatic parameters, particularly air wet bulb temperature. Different approaches and methods (analytical and empirical) for evaluation of tower performance are discussed in order to define the most appropriate performance characteristic and calculation method which can be used for establishing the optimal working mode of analysed cooling system.
PAPER REVISED: 2019-06-24
PAPER ACCEPTED: 2019-07-01
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE Issue 2, PAGES [1423 - 1433]
  1. Delalic, N. et. al., Determination of key parameters in the process of optimization of the thermal power plant cooling system, Proceedings, International Conference on Innovative Technologies (IN-TECH), Ljubljana, 2017, pp. 173-176
  2. Kröger, D.G., Air-Cooled Heat Exchangers and Cooling Towers, PennWell Corporation, Tulsa, Okl., 2004
  3. Singham, J. R., Chapter 3.12 Cooling towers, in: Heat exchanger design handbook (Ed. E.U. Schlünder, Hemisphere Publishing Corporation, Washington, 1983, pp. 3.12.1-1 - 3.12.6-4
  4. Erens, P.J., Specific Heat Transfer Devices - N4 Cooling towers, in: VDA Heat Atlas, Springer, Berlin, Heidelberg, 2010, pp. 1485 - 1500
  5. Khan, J.R., Performance characteristics of counter flow wet cooling towers, Energy Conversion and Management, 44 (2003), pp. 2073-2091
  6. Li, Y., The study on the evaporation cooling efficiency and effectiveness of cooling, Energy Conversion and Management, 52 (2011), pp. 53-59
  7. Fisenko, S.P., Petruchik, A.I., Toward to the control system of mechanical draft cooling tower of film type, International Journal of Heat and Mass Transfer, 48 (2005), pp. 31-35
  8. Lakovic, M., Industrial cooling tower design and operation in the moderate-continental climate conditions, Thermal Science, 20 (2016), pp. 1203-1214
  9. Cooling Towers, in: ASHRAE Handbook - HVAC Systems and Equipment, ASHRAE Inc., Atlanta, United Stated of America, 2016
  10. Mansour, M.K., Hassab, M.A., Innovative correlation for calculating thermal performance of counterflow wet-cooling tower, Energy, 74, 2014, pp. 855-862
  11. Kadric, Dz., Heat and mass transfer coefficients in cooling towers, Proceedings, 8th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics, Lisbon, Portugal, 2013, paper n°117
  12. Zemanek, I., Heat and Mass Transfer in Cooling Tower Packing, National Research Institute for Machine Design, Prague, Czech Republic, 1989.

© 2022 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence