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

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.

Key words:spray humidification air cooler; pressure drop; heat transfer coefficient; spray cooling correlation expression