Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 107, Issue -, Pages 271-280Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2016.11.046
Keywords
Natural draft dry cooling tower; Performance enhancement; Crosswind; Water distribution
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Funding
- Australian Government, through the Australian Renewable Energy Agency (ARENA)
- China Scholarship Council (CSC)
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Crosswind is a big challenge to the cooling performance of natural draft dry cooling towers (NDDCTs) and has attracted a lot of attention in previous research. This study proposed a new method to increase the performance of NDDCT under crosswind conditions by optimizing the hot water mass flow rate in the air-cooled heat exchangers. The 20 m UQ Gatton NDDCT was selected as a case study to test and validate this method. The cooling performance of this cooling tower under crosswind condition was evaluated by the 3-D CFD model. The results show that the crosswind redistributes the air flow and result in a non-uniform heat exchanger performance. By optimizing the hot water mass flow rate among the heat exchanger bundles, the cold fluids and hot fluids of the air-cooled heat exchanger can be better matched. The cooling performance of the NDDCT is increased by 18% when the crosswind speed is 4 m/s. (C) 2016 Elsevier Ltd. All rights reserved.
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