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Spray Effect on the Thermal Performances of a Dry Cooling Tower

Zhe Geng1, Feng Feng1, Shuzhen Zhang1, Jie Li2, Chengwei Liu3, Yang Li4, Tiantian Liu4, Suoying He4,*

1 Research Institute of Intelligent Energy Technology, Shandong Hetong Information Technology Co., Ltd., Jinan, 250013, China
2 Information Office, Jinan Heating Group Co., Ltd., Jinan, 250011, China
3 Information Office, Jinan Energy Investment Holding Co., Ltd., Jinan, 250098, China
4 Shandong Engineering Laboratory of High-Efficiency Energy Conservation and Energy Storage Technology & Equipment, School of Energy and Power Engineering, Shandong University, Jinan, 250061, China

* Corresponding Author: Suoying He. Email:

(This article belongs to this Special Issue: Advances in Thermodynamic System and Energy Conservation Technology)

Fluid Dynamics & Materials Processing 2023, 19(9), 2289-2304.


Pre-cooling the inlet air of a dry cooling tower by means of a spray can improve the tower performance during periods of high temperature. To study the spray effect on the thermal performance of natural draft dry cooling towers (NDDCTs), in this study 3-D numerical simulations of such a process have been conducted using Fluent 16.2 (a two-way coupled Eulerian-Lagrangian approach). The considered NDDCT is 120 m high and only half system is simulated due to its structural symmetry. Three different spray strategies have been investigated at a typical crosswind speed of 4 m/s, which is the most frequent wind speed. The results have shown that: (1) The three implemented spray strategies can improve the thermal performance of the studied NDDCT with a varying degree of success. In one case, the heat rejection rate can be increased by 35.2%, and the tower outlet water temperature can be decreased by 2.1°C when compared with the no spray case; (2) To improve the thermal performance of the NDDCT using a small amount of water, the design of the spray pre-cooling system must include more nozzles on the windward and fewer or even no nozzles on the leeward sides of the NDDCT.

Graphical Abstract

Spray Effect on the Thermal Performances of a Dry Cooling Tower


Cite This Article

Geng, Z., Feng, F., Zhang, S., Li, J., Liu, C. et al. (2023). Spray Effect on the Thermal Performances of a Dry Cooling Tower. FDMP-Fluid Dynamics & Materials Processing, 19(9), 2289–2304.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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