摘要
建立了600MW三塔合一间接空冷塔的数学模型,通过数值模拟探究结构参数对热力性能的影响规律,并以进塔风量和出塔水温为评价标准,获得了最优的结构参数。研究结果表明:随着出口直径或喉部直径的增大,热力性能先增强后减弱;无风工况下,随着喉部高度的增大,热力性能先增强后减弱,4m/s工况与之相反;随着塔高度的增大,热力性能持续增强;随着排烟高度或烟囱直径的改变,热力性能的变化并不大;随着脱硫塔直径的增大,热力性能继续减弱;当出口直径与零米直径的比值R1/R2=0.8~0.85,喉部直径与零米直径的比值R0/R2=0.6~0.65时,空冷塔热力性能最优。
A numerical model was established for a 600MW indirect air cooling tower with three incorporate towers. The parameters which determine the structure were investigated using numerical calculation. Their influences on the thermal performance were studied in details with inlet air quantity and outlet water temperature for evaluation index. The best parameters were acquired. The results indicate： when outlet diameter or throat diameter increases, the thermal performance will increase first, but as outlet diameter or throat diameter increasing to some value the thermal performance begins to decrease. When there is no crosswind, the thermal performance will increase firstly and then decrease with the increase of throat height, as the crosswind velocity is 4m/s, the change law is opposite. With the increase of tower height, the thermal performance continues to increase. The influence of the height of flue gas or chimney diameter on the thermal performance can be negligible. With the increase of the diameter of desulfidation tower, the thermal performance continues to decrease. While the ratio of outlet diameter to base diameter R1/R2 = 0.8 - 0.85, and the ratio of throat diameter to base diameter Ro/R2 = 0.6 - 0.65, the air cooling tower achieves optimal thermal performance.
出处
《汽轮机技术》
北大核心
2017年第4期257-260,290,共5页
Turbine Technology
关键词
三塔合一
间接空冷塔
结构参数
热力性能
进塔风量
出塔水温
three incorporate towers
indirect air cooling tower
structural parameters
thermal performance
inlet air quantity
outlet water temperatur
