Flow deflectors to release the negative defect of natural wind on large scale dry cooling tower

doi:10.1016/j.ijheatmasstransfer.2018.09.009

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	Flow deflectors to release the negative defect of natural wind on large scale dry cooling tower
	Wu, Tao 1; Ge, Zhihua 1; Yang, Lijun 1; Du, Xiaoze 2
刊名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
	2019-01
卷号	128 页码:248-269
关键词	Natural draft dry cooling tower Thermo-fluid performance Natural wind Air flow deflectors
ISSN号	0017-9310
DOI	10.1016/j.ijheatmasstransfer.2018.09.009
英文摘要	In order to reduce the unfavorable impacts of natural wind, the arc curved air flow deflectors were proposed to be settled around the natural draft dry cooling tower. Based on 2 x 600 MW indirect air cooling power generating units, the thermo-fluid models of the natural draft dry cooling tower coupled with condenser of turbine are developed, by which the cooling performances are investigated at natural wind speed ranged from 0 to 20 m/s. The numerical results with experimental validations illustrate the thermo-fluid performance distributions of different cooling sectors around the dry cooling tower. It can be obtained that in the presence of ambient natural wind, the proposed deflectors could extend the positive effects of natural wind, leading to the decrease of outlet temperature of circulating water and back pressure of turbine. Compared to the case without deflectors, the total air mass flow rate could be increases by 50.26%, the outlet temperature of circulating water could be decreased by 10.73 degrees C and the back pressure of turbine could be decreases by 7.33 kPa when the wind speed is 20 m/s. In the absence of wind, the changes of air mass flow rate, heat rejection, outlet water temperature and back pressure are all no more than 0.5% compared with that without the deflectors, implying almost no negative impacts of the proposed deflectors under various operating conditions. The natural wind direction has little influence on the performance of natural draft dry cooling tower with deflectors. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目	National Basic Research Program of China (973 Program)[2015CB251503]
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000449445600022
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32220]
专题	兰州理工大学能源与动力工程学院
通讯作者	Du, Xiaoze
作者单位	1.North China Elect Power Univ, Key Lab Condit Monitoring & Control Power Plant E, Minist Educ, Beijing 102206, Peoples R China 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wu, Tao,Ge, Zhihua,Yang, Lijun,et al. Flow deflectors to release the negative defect of natural wind on large scale dry cooling tower[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2019,128:248-269.
APA	Wu, Tao,Ge, Zhihua,Yang, Lijun,&Du, Xiaoze.(2019).Flow deflectors to release the negative defect of natural wind on large scale dry cooling tower.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,128,248-269.
MLA	Wu, Tao,et al."Flow deflectors to release the negative defect of natural wind on large scale dry cooling tower".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 128(2019):248-269.