TY  - EJOU
AU  - Geng, Zhe 
AU  - Feng,  
AU  - Zhang, Shuzhen 
AU  - Li, Jie 
AU  - Liu, Chengwei 
AU  - Li, Yang 
AU  - Liu, Tiantian 
AU  - He, Suoying 

TI  - Spray Effect on the Thermal Performances of a Dry Cooling Tower
T2  - Fluid Dynamics \& Materials Processing

PY  - 2023
VL  - 19
IS  - 9
SN  - 1555-2578

AB  - 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.
KW  - Natural draft dry cooling tower; spray strategy; thermal performance; simulation

DO  - 10.32604/fdmp.2023.026707