增湿型空冷器喷嘴热工特性比较实验研究

A Comparative Study of Thermal Property Among Different Nozzles of Spray Humidification Air Cooler

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，选用波纹板式增湿型空冷器对3种喷嘴布置方式的降温特性、空气侧与热水侧阻力、传热特性进行实验研究.结果表明，在空气冷却效果及热水冷却效果方面，压力式螺旋型喷嘴较优.得到了3种喷嘴布置方式的波纹板式空冷器阻力降关联式、换热系数关联式.通过对喷嘴喷雾降温特性的研究，拟合得到了接触系数与空气质量流速和水汽比关联式.

Abstract:

Aiming at the problem of air cooled condenser output limit under high temperature in summer, the spray humidification system is adopted here to reduce inlet air temperature. Therefore, experiments are presented to study cooling characteristics of three nozzle layouts, air side and hot water side resistance, heat transfer characteristics of corrugated plate spray humidification air cooler. Experiment results show pressure screw type nozzle is superior in both air side and hot water side cooling effects. Correlation expressions of pressure drop and heat transfer coefficient are obtained in three nozzle layouts. Through the research on spray cooling characteristics of nozzle, the correlation expression between contact coefficient and air mass velocity & water to air steam ratio is fitted and obtained.