带填料型闭式冷却塔热力计算方法研讨

Discussion on Thermal Calculation Method of Closed Cooling Tower with Packing

市面上常见的带填料型闭式冷却塔目前研究较少,结合传统逆流闭式冷却塔和横流开式冷却塔的计算方法,建立了一种带填料型闭式冷却塔热交换模型,将盘管部分喷淋水与填料部分喷淋水分开计算热平衡,以求得从盘管段流出的喷淋水温,从而试算出所需盘管数量及填料数量。所得结果与AXIMA现有标准塔型相比,误差在10%~30%,分析原因可能是计算中所选用的经验公式及盘管、填料的布置方式有所差异,证明此种计算方法基本可行,只需根据相应设计情况选用合适的经验公式及布置方式,可用于冷却塔的选型及校核计算。

There is little research on the common closed cooling towers with packing on the market.This article combines the calculation methods of traditional counter-flow closed cooling towers and cross-flow open cooling towers to establish a heat exchange model with packed closed cooling towers.The spray water of the coil part and the spray water of the filler are calculated separately to calculate the heat balance to obtain the temperature of the spray water flowing from the coil section,so as to try to calculate the required number of coils and the number of fillers.Compared with the existing standard tower type,the obtained result has an error of no more than 10%,and can be used for the design and check calculation of this type of tower.