Performance enhancement for the natural draft dry cooling tower under crosswind condition by optimizing the water distribution

被引：47
|
作者：
Li, Xiaoxiao [1 ]
Xia, Lin [2 ]
Gurgenci, Hal [1 ]
Guan, Zhiqiang [1 ]
机构：
[1] Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld, Australia
[2] Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing, Jiangsu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2017年 / 107卷
关键词：
Natural draft dry cooling tower; Performance enhancement; Crosswind; Water distribution; THERMO-FLOW PERFORMANCES; VERTICAL DELTA RADIATORS; AMBIENT WINDS; EFFICIENCY; SYSTEM; SIMULATION; DESIGN; LAYOUT; WALLS;
D O I：
10.1016/j.ijheatmasstransfer.2016.11.046
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
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.
引用
收藏
页码：271 / 280
页数：10
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