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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

FIELD TEST ON THE COOLING PERFORMANCE FOR HIGH LEVEL WATER COLLECTING WET COOLING TOWER UNDER CROSSWIND CONDITIONS

Get access (open in a dialog) DOI: 10.1615/IHTC16.cov.023003
pages 3535-3540

Abstract

Under crosswind conditions, field test was conducted on the high level water collecting wet cooling tower (HWCT) of a 1000MW unit to investigate cooling performance under circulating water flowrate Q, the change rules of cooling efficiency η and Merkel number N were analyzed. The results showed that crosswind appears a continuously adverse effect on the cooling performance with the rise of velocity. θ represents the angle between cross walls and crosswind direction, at the same crosswind velocity and circulating water flowrate, the cooling performance under θ1=5° is more superior than that under θ2=35°. In addition, at the same θ angle and circulating water flowrate, the higher the crosswind velocity is, the worse the thermal performance becomes. Taking 69553t/h condition as an example, when the crosswind velocity reaches to 3.74m/s, under θ1=5° conditions, compared with that of 0.28m/s condition, η and N reduced 18.29% and 12.54%, however, under θ2=35° conditions, η and N decreased 23.81% and 13.58%, respectively. Moreover, at the same crosswind velocity and θ angle, both η and N are inversely proportional to Q, however, the larger the circulating water flowrate is, the better the adaptability of HWCTs to the crosswind is.