自然通风高位收水冷却塔性能对比分析

Performance Analysis of high-level Water Collecting Cooling Tower

以某逆流式自然通风常规冷却塔为研究对象,对其相同尺寸的高位收水冷却塔进行对比仿真分析,研究布置高位收水装置对冷却塔效果的影响。在多种运行工况下分别对常规冷却塔和高位收水冷却塔进行模拟计算,分析高位收水装置布置前后塔内空气流动和温度变化,以及冷却水平均温降的变化。结果表明,相较于常规冷却塔,同种条件下高位收水塔内通风量增加了约20%,改善了空气与冷却水之间的传质传热,使得冷却水温降提高了约30%。

A conventional counter-current natural ventilation cooling tower was taken as the research object to simulate and analyze the cooling performance compared with the high-level water collecting cooling tower of the same size and study the influence of the arrangement of high-level water receiver on the cooling effect of the cooling tower.According to various working conditions,the conventional cooling tower and high-level water collecting tower are simulated and calculated respectively.The air flow and the temperature change in the tower between the conventional tower and high-level water collecting tower,as well as the change of the average temperature drop of cooling water are analyzed.The results show that,compared with the conventional cooling tower,the ventilation volume in the high-level water collecting tower under the same condition increases by about 20%,the mass transfer and heat transfer between air and cooling water improve significantly,and the temperature drop of cooling water increases by about 30%.