Numerical study on performance improvement of air-cooled condenser by water spray cooling

doi:10.1016/j.ijheatmasstransfer.2018.05.006

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	Numerical study on performance improvement of air-cooled condenser by water spray cooling
	Xiao, Liehui 1; Ge, Zhihua 1; Yang, Lijun 1; Du, Xiaoze 2
刊名	International Journal of Heat and Mass Transfer
	2018-10-01
卷号	125 页码:1028-1042
关键词	Air Cooling Cooling systems Evaporation Liquid films Nozzle design Rocket nozzles Spray steelmaking Air-cooled condensers Back pressures Experimental validations Finned tube bundles Inlet air temperatures Power generating units Water consumption Water sprays
ISSN号	00179310
DOI	10.1016/j.ijheatmasstransfer.2018.05.006
英文摘要	Water spray cooling is an efficient way to enhance heat transfer of the air-cooled condenser (ACC) of power generating unit under high ambient temperatures. Taking the air-cooled 300 MW power generating unit as object, the flow and temperature fields of ACC with water spray cooling were analyzed by numerical simulation with experimental validation. Based on the air flow field inside ACC cell, an improved water spray nozzles arrangement was proposed to enhance the cooling capacity. The inlet air temperature and back pressure of turbine were compared with that under the original nozzles arrangement. The water consumptions including that of water droplets pre-cooling evaporation in air flow, liquid film evaporation on the finned tube bundles, and drainage of redundant water were obtained. The influences of water spray rate, spray direction and nozzles distance on cooling performance were investigated. The results showed that the improved nozzles arrangement is expected to provide efficient cooling performance and significant reduction in back pressure of the objective power generating unit. The improved nozzles arrangement with upward spray direction and nozzles distance of 0.8 m can be applied to the design of water spray system in ACC. In addition, the obtained redundant drainage water under various ambient conditions provided the evidence for spray water rate optimization. © 2018 Elsevier Ltd
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000440118600088
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114537]
专题	兰州理工大学能源与动力工程学院新能源学院
作者单位	1.Key Laboratory of Condition Monitoring and Control for Power Plant Equipment (North China Electric Power University), Ministry of Education, Beijing; 102206, China; 2.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Xiao, Liehui,Ge, Zhihua,Yang, Lijun,et al. Numerical study on performance improvement of air-cooled condenser by water spray cooling[J]. International Journal of Heat and Mass Transfer,2018,125:1028-1042.
APA	Xiao, Liehui,Ge, Zhihua,Yang, Lijun,&Du, Xiaoze.(2018).Numerical study on performance improvement of air-cooled condenser by water spray cooling.International Journal of Heat and Mass Transfer,125,1028-1042.
MLA	Xiao, Liehui,et al."Numerical study on performance improvement of air-cooled condenser by water spray cooling".International Journal of Heat and Mass Transfer 125(2018):1028-1042.