Compared with uniform fill layouts

non-uniform fill layouts show an improvement on the performance of the cooling tower. In order to investigate the influence of fill layouts on thermal performance and drag characteristic of the cooling tower

based on the original fill layouts of equal height and equal interval

optimization design of unequal height and unequal interval was carried out on the filler of the cooling tower. The threedimensional numerical models of three kinds of fill layouts were established to compare their performance under different working conditions. Then

four typical operating conditions in practice running were selected to compare the numerical simulation results and the measured data. The results show that

compared with the uniform fill layouts

both the unequal interval fill layouts and the unequal height fill layouts can improve the heat transfer performance of the cooling tower

which make the temperature drop increased by 0.7~1.0 ℃. Besides

compared with the unequal height fill layouts

the unequal interval fill layouts not only improve the cooling effect of the outside region of the cooling tower

but also significantly enhance the cooling performance of the central area of the cooling tower. Integrate various working conditions

the temperature drop of the unequal interval fill layouts increases by about 0.2 ℃ compared with the unequal height fill layouts. In addition

the numerical simulation results are consistent with the experimental data and both have the same trends. It indicates that the numerical simulation can reflect the actual operation of the cooling tower

and can be used to guide the design of the fill layouts.