压力式螺旋型喷嘴降温特性实验研究

Experimental Study on the Cooling Characteristic of Pressure-Type Spiral Nozzles

摘要:

针对空冷机组在夏季高温天气不能满发的问题，采用喷雾增湿以降低入口空气的干球温度。选用压力式螺旋型雾化喷嘴进行喷雾降温的实验研究，实验包括喷嘴流量特性实验及不同喷嘴布置方式的喷雾降温实验。通过整理实验数据，得到喷嘴流量特性曲线，在对降温过程进行热湿交换分析的基础上，拟合出以蒸发冷却为主要降温机理的降温效果关联式，通过比较喷嘴不同布置方式的降温效果，得出排间距为500mm的喷嘴布置方式降温效果略好于排间距为1000mm。

Abstract:

Aiming at the problem of air-cooled condenser output limit, the spray humidification system is presented here to reduce inlet air temperature. In this paper, pressure-type spiral nozzle is chosen for inlet spray cooling, and experiments include nozzle flow rate experiment and spray cooling experiment with different layout of nozzles. Through analysis of experiment data, characteristic curve of nozzle flow rate is acquired. And through heat and mass transfer analysis of spray cooling, the cooling effect fitting correlation which evaporative cooling is major cooling mechanism. And the results of experiments under different layout show that the 500mm of row distance is better than 1000mm.