Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

NUMERICAL STUDY OF THERMAL PERFORMANCE FOR LARGE-SCALE WET COOLING TOWER EQUIPPED WITH A FAN DRIVEN BY WATER DROPPING POTENTIAL ENERGY

Get access (open in a dialog) DOI: 10.1615/IHTC16.cov.023243
pages 2891-2896

Abstrakt

For the super large-scale wet cooling towers, the higher rain zone produces the larger water dropping potential energy. In this paper, a three dimensional (3D) numerical model for a natural draft wet cooling tower was established and validated by experimental data. On the foundation of the model, a fan which is driven by water dropping potential energy is equipped above the drift eliminator to enhance the suction force, and then the thermal performance of cooling tower with fan is studied under different power and different fan diameters. The results manifest that compared with the traditional cooling tower, the air mass flow rate can enhance by approximately 1.62% at most and the outlet water temperature reduces by up to 0.128K under the same work conditions. In addition, the influence of different fan diameters on the thermal performance of the cooling tower is studied. Under the same rotation speed, the larger the fan diameter is, the better the thermal performance is. Here the dimensionless number n which is the ratio of the diameter between fan and tower on the same horizontal level is introduced to evaluate the thermal performance. The simulation results demonstrate that under the same power, the cooling tower has the better thermal performance when the dimensionless number n is 0.125 in this study.