烟塔合一型湿式冷却塔填料非均匀布置数值模拟研究OA

To enhance the cooling performance of wet cooling towers with the chimney,this study proposed an optimization method based on the fillings non-uniform layout of screen fillings.The thermodynamic and resistance characteristics of S-wave fillings and screen fillings were compared using performance calculation formulas.A three-dimensional numerical model was established to investigate the effects of different fillings partition radius R1 on the flow field and heat-mass transfer performance.The results demonstrated that the 3D mesh structure of screen fillings significantly improved droplet dispersion and outperformed S-wave fillings in comprehensive performance.The fillings non-uniform layout strategy effectively enhanced the uniformity of gas-liquid two-phase flow in the tower.Under typical summer condition,the optimal configuration for fillings non-uniform layout was:1 m-high screen fillings in the inner zone,1.25 m-high screen fillings in the outer zone with R1=5 m.Compared to the original tower,the water temperature drop,the cooling efficiency,and the ventilation were improved by 0.76℃,5.28%,and 6.76%,respectively.The research could provide theoretical support for study of energy-saving and efficiency improvement in wet cooling towers.