An experimental study has been carried out on the water distribution system of a 160 m3/hr pilot cooling tower. The performances of different industrial water distributors have been evaluated by changing the operative conditions of the pilot tower. In particular, the efficiency and the uniformity of the water distribution have been investigated and compared with the results obtained in a small-scale loop, in which the single nozzles were tested. Measurements in both systems, pilot tower and small-scale loop, included the geometric characteristics of the jet umbrella by ensemble photography, the wetted zone by measuring the specific flow rate, and the drop size distribution and liquid concentration by high-speed photography. The results show that correlations exist between the nozzle behavior in single and pilot tower configurations. The uniformity of the water distribution in the pilot tower is strongly related to the nozzle installation pattern and to the operative conditions. Coalescence plays an important role in the drop size distribution in the pilot tower. Comments upon the influence of these parameters on the tower behavior are also included.
Characterization and performance of spray nozzles for water distribution in cooling towers
TOGNOTTI, LEONARDO;
1991-01-01
Abstract
An experimental study has been carried out on the water distribution system of a 160 m3/hr pilot cooling tower. The performances of different industrial water distributors have been evaluated by changing the operative conditions of the pilot tower. In particular, the efficiency and the uniformity of the water distribution have been investigated and compared with the results obtained in a small-scale loop, in which the single nozzles were tested. Measurements in both systems, pilot tower and small-scale loop, included the geometric characteristics of the jet umbrella by ensemble photography, the wetted zone by measuring the specific flow rate, and the drop size distribution and liquid concentration by high-speed photography. The results show that correlations exist between the nozzle behavior in single and pilot tower configurations. The uniformity of the water distribution in the pilot tower is strongly related to the nozzle installation pattern and to the operative conditions. Coalescence plays an important role in the drop size distribution in the pilot tower. Comments upon the influence of these parameters on the tower behavior are also included.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
