干旱区生态环境知识资源中心(Arid): Numerical study identifies the interaction between two adjacent dry cooling towers on fluid flow and heat transfer performances of the radiators at different points of each tower

Arid

DOI	10.1016/j.ijthermalsci.2023.108351
	Numerical study identifies the interaction between two adjacent dry cooling towers on fluid flow and heat transfer performances of the radiators at different points of each tower
	Ma, Huan; Cai, Liang; Si, Fengqi
通讯作者	Ma, H ; Si, FQ
来源期刊	INTERNATIONAL JOURNAL OF THERMAL SCIENCES
ISSN	1290-0729
EISSN	1778-4166
出版年	2023
卷号	191
英文摘要	A reliable thermal power plant in arid area usually has twin power-generating units equipped with two dry cooling towers. For a twin-tower configuration, a three-dimensional numerical model was built to capture thermo-hydraulic characteristics of both towers and distribution patterns of heat transfer performances of their radiators. Results showed that the interaction between two adjacent towers is a combination of negative blocking effect and positive wind-breaking effect of one tower to another, and its influences on radiators of different orientations are distinct and dependent on wind direction and speed. As wind attack angle increases, the overall cooling performance of the upstream tower improves and its sensibility to wind speed declines, while performance variation of the downstream tower shows a decrease followed by an increase. The downstream tower performs worse than the upstream tower in most crosswind cases, except for the wind situation where the downstream tower is almost entirely blocked by the upstream one. For a given wind speed of 12 m/s, cooling efficiency of the upstream (downstream) tower rises from 69.4% to 73.7% (91.7%) as wind attack angle varies from 0 degrees to 90 degrees, causing condenser pressure of the associated power unit to reduce from 23.5 kPa to 20.5 kPa (14.4 kPa). As the tower spacing increases, the tower interaction mitigates and cooling performance difference between the two towers narrows. The decrease of ambient temperature barely impacts cooling efficiency of the tower, but does cause a drop in condenser pressure of the unit without changing the sensitivity of condenser pressure to crosswind. The increase in condenser heat load helps to improve cooling tower performance and reduces its sensitivity to crosswind. Whereas, the growth in condenser heat load dominates the increases in condenser pressure and its sensitivity to crosswind.
英文关键词	Dry cooling tower Thermo -hydraulic characteristic Cooling efficiency Ambient crosswind Numerical simulation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000987935900001
WOS关键词	VERTICAL DELTA RADIATORS ; THERMAL PERFORMANCE ; CROSSWIND ; WIND ; SYSTEM ; IMPROVEMENT ; EFFICIENCY ; ENHANCEMENT ; DEFLECTORS ; MECHANISM
WOS类目	Thermodynamics ; Engineering, Mechanical
WOS研究方向	Thermodynamics ; Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397047
推荐引用方式 GB/T 7714	Ma, Huan,Cai, Liang,Si, Fengqi. Numerical study identifies the interaction between two adjacent dry cooling towers on fluid flow and heat transfer performances of the radiators at different points of each tower[J],2023,191.
APA	Ma, Huan,Cai, Liang,&Si, Fengqi.(2023).Numerical study identifies the interaction between two adjacent dry cooling towers on fluid flow and heat transfer performances of the radiators at different points of each tower.INTERNATIONAL JOURNAL OF THERMAL SCIENCES,191.
MLA	Ma, Huan,et al."Numerical study identifies the interaction between two adjacent dry cooling towers on fluid flow and heat transfer performances of the radiators at different points of each tower".INTERNATIONAL JOURNAL OF THERMAL SCIENCES 191(2023).