横流式冷却塔热力计算方法的研究

Study of Thermal Calculating Method on the Crossflow Cooling Tower

本文分析了横流式冷却塔的两种热力计算方法.从几种典型工况可以看出,在水汽比小于1时,焓差法和压差法得到的冷却数NTU不存在很大差别.但在水汽比大于1时,两者的NTU差别随水汽比的增大而增大.最后本文还用压差法分析了工况条件对冷却塔特性的影响.

This paper has analysed the two methods of thermal calculation on the cross-flow cooling towers. The results of some typical runs show that there is not any great difference between the NTUs obtained from the enthalpy potential method and the pressure potential method when the ratio of water to air(WGR) is smaller than one but the difference increases with the increase of WGR when WGR is greater than one. Finally, this paper has also analysed the influence of working condition on the characteristics of cooling towers using the pressure potential method.