并联型复合式冷却塔工作性能研究

Experimental Study on the Performance of a Parallel Hybrid Cooling Tower

通过对并联型复合式冷却塔模型的实验操作,研究截面风速和喷淋密度对复合式冷却塔冷却性能与阻力性能的影响规律,与此同时探究干湿区流量配比对并联型复合式冷却塔的性能影响。研究结果表明,并联型复合式冷却塔干湿区的冷却性能均随截面风速的增大,先增强后减弱。随喷淋密度的增大,先增强后减弱。对于并联型复合式冷却塔的阻力性能,干湿区皆随截面风速增大而增大,湿区随喷淋密度的增大而增大,而干区阻力随喷淋密度的增大无明显变化,且阻力系数与气水比之间呈负相关关系,截面风速和喷淋密度对其没有直接的影响。对于并联型复合式冷却塔,在干湿区流量配比为3:7时冷却性能达到最佳,冷却效率可达57.44%。

The performance of a hybrid cooling tower is investigated through the experimental operation of a 2 t/h cooling tower model.The effects of air velocity and spray density on the cooling performance and resistance performance of the hybrid cooling tower were studied.At the same time,the flow ratio of dry and wet areas was investigated.The results demonstrate that the performance of the hybrid cooling tower increases and then decreases as the air velocity increases.Moreover,with the increase in spray density,the cooling performance increases and then weakens.The hybrid cooling tower resistance increases with the air velocity,and the wet section resistance increases with the spray density.However,the resistance of the dry section does not change significantly with the increase of the spray density.And the drag coefficient has a negative correlation with the gas-water ratio.The air velocity and spray density have no direct influence on the parallel type composite cooling tower.For the parallel path hybrid cooling tower,the cooling performance is optimal when the flow ratio is 3:7 in the dry and wet section,and the cooling efficiency can reach 57.44%.